The volume of a cube is increasing at a rate of 12 cm3/min. How fast is the surface area increasing when the length of an edge is 40 cm

Answers

Answer 1

Answer:

\(\frac{dA}{dt}=\frac{6}{5}cm^2/min \)

Step-by-step explanation:

Given

\(\frac{dV}{dt}=12cm^3/min \) <-- The change in volume with respect to time

\(V=s^3\) <-- Volume of a cube

\(A=6s^2\) <-- Surface area of a cube

\(\frac{dA}{dt}=? \) <-- The change in surface area with respect to time

\(s=40cm\) <-- Length of edge of cube

Solve for ds/dt:

\(V=s^3\)

\(\frac{dV}{dt}=3s^2\frac{ds}{dt} \)

\(12=3(40)^2\frac{ds}{dt} \)

\(12=4800\frac{ds}{dt} \)

\(\frac{1}{400}=\frac{ds}{dt} \)

Solve for dA/dt:

\(A=6s^2\)

\(\frac{dA}{dt}=12s\frac{ds}{dt} \)

\(\frac{dA}{dt}=12(40)(\frac{1}{400}) \)

\(\frac{dA}{dt}=12(\frac{1}{10}) \)

\(\frac{dA}{dt}=\frac{12}{10} \)

\(\frac{dA}{dt}=\frac{6}{5}cm^2/min \)

Therefore, the surface area of the cube is increasing at a rate of 6/5 cm²/min when the length of an edge is 40 cm.

Let me know if you need more help with related rates!


Related Questions

Josiah owes $3,500 on his credit card with a minimum percentage of 3% or $100 (whichever is higher). How much is the minimum payment due?

Answers

$105 is higher than $100, the minimum Payment due on Josiah's credit card is $105.

The minimum payment due on Josiah's credit card 3% of his outstanding balance and compare it to the minimum payment of $100. The higher amount between the two will be the minimum payment.

1. Calculate 3% of $3,500:

3% * $3,500 = 0.03 * $3,500 = $105

2. Compare the calculated amount with the minimum payment of $100:

Minimum payment = max($105, $100)

Since $105 is higher than $100, the minimum payment due on Josiah's credit card is $105.

The credit card company sets a minimum payment to ensure that the cardholder makes regular payments towards their outstanding balance. The minimum payment is usually a percentage of the balance or a fixed amount, whichever is higher. In this case, the minimum payment is calculated as 3% of the outstanding balance or $100, whichever amount is greater.

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please help!!! if i don’t get this test right then i fail and i really can’t ! i’ll mark brainlyist ! pleasee
anyone

please help!!! if i dont get this test right then i fail and i really cant ! ill mark brainlyist ! pleaseeanyone

Answers

Answer:

208 cubic units

Step-by-step explanation:

The composite figure in the picture is composed of a triangular prism and a rectangular prism, both which can be calculated by the base * height formula.
First, let’s calculate the volume of the triangular prism:

The base is the area of the triangle base, which is dc/2, or 4*3/2, which is 6. Next, multiply the area of the base by the height “b”: 6 * 8 = 48.

Now, let’s calculate the volume of the rectangular prism:

The base is the rectangular base’s area, which is a*c, or 5*4, which is 20. Next multiply the base by the height “b”: 20 * 8 = 160


Now, add up the volumes of the rectangular and triangular prisms:

160 + 48 = 208 cubic units

Mario needs a loan to buy a tractor for his farm. He qualified for a loan at 2 different banks.
.
First Bank of Trust
Loan Amount: $25,000
Annual Simple Interest
Rate: 6.5%
Loan Length: 4 years
What is
.
Enter your answer in the box.
.
Valor Bank
Loan Amount: $25,000
Annual Simple Interest
Rate: 4%
Loan Length: 6 years
total amount Mario will pay, including loan amount and interest, for the First Bank of Trust loan?

Answers

Answer:$31,500

Step-by-step explanation:

To calculate the total amount Mario will pay, including the loan amount and interest, for the loan from First Bank of Trust, we need to calculate the interest and add it to the loan amount.

The formula to calculate simple interest is:

Interest = (Loan Amount) x (Interest Rate) x (Loan Length)

Let's plug in the values given:

Loan Amount = $25,000

Interest Rate = 6.5% (or 0.065 as a decimal)

Loan Length = 4 years

Interest = $25,000 x 0.065 x 4 = $6,500

Now, let's calculate the total amount Mario will pay:

Total Amount = Loan Amount + Interest = $25,000 + $6,500 = $31,500

Therefore, the total amount Mario will pay, including the loan amount and interest, for the First Bank of Trust loan is $31,500.

write 464000 in correct scientific notation​

Answers

Answer:

The scientific notation is a method of writing very large or very small numbers in a more compact and easy to read format. It is expressed in the form of a x 10^n, where "a" is a number between 1 and 10, and "n" is an integer.

To write 464000 in correct scientific notation, we need to move the decimal point to the left until we get a number between 1 and 10. We count the number of places we moved the decimal point, and that will be the exponent of 10.

So, we can write 464000 as:

4.64 x 10^5

Therefore, the correct scientific notation of 464000 is 4.64 x 10^5.

Step-by-step explanation:

Please help! The photo will explain it all, help is much appreciated! :)

Please help! The photo will explain it all, help is much appreciated! :)

Answers

Answer:

The answer is - 4/5

Step-by-step explanation:

Because the "opposite" of a number is its inverse operation, therefore it is negative 4/5

Please awnser asap I am
Stuck

Please awnser asap I amStuck

Answers

Answer:

it is too blury to read

Step-by-step explanation:

A jar contains 20 yellow jellybeans, 20 orange jellybeans, 20 red jellybeans and 20 green jellybeans.

Required:
a. In how many ways can you put all the jellybeans in a row?
b. How many ways are there to select a handful of 20 jellybeans?
c. How many ways are there to select a handful of 20 jellybeans that contains at least 3 red?
d. How many ways are there to select a handful of 20 jellybeans that contains at least 3 red and at most 2 orange?

Answers

Answer:

A)

\(\left \{ {{80} \atop {20}} \} * \left \{ {{60} \atop {20}} \} * \left \{ {{40} \atop {20}} \} * \left \{ {{20} \atop {20}} \}\)

B)

\(\left \{ {{20+4-1} \atop {4-1}} \} = \left \{ {{23} \atop {3}} \}\)

C)

= \(\left \{ {{17+4+1} \atop {4-1}} \} = \left \{ {{20} \atop {3}} \}\)

D)

= \(\left \{ {{20} \atop {3}} \} - \left \{ {{17} \atop {3}} \}\)

Step-by-step explanation:

A) How many ways can you put all Jellybeans in a row

Total number of Jellybeans = 80

The first jellybeans = 20 yellow , second is 20 orange jellybeans , third is 20 red jellybeans , fourth is 20 green jellybeans

Therefore the number of ways the Jellybeans can be put in a row is :

\(\left \{ {{80} \atop {20}} \} * \left \{ {{60} \atop {20}} \} * \left \{ {{40} \atop {20}} \} * \left \{ {{20} \atop {20}} \}\)

B) How many ways are there to select a handful of 20 jellybeans

lets assume:

yellow jellybeans = a , orange jellybeans = b , red jellybeans = c , green jellybeans = d

a + b + c + d = 20

This is the number Non-negative integer solutions

= \(\left \{ {{20+4-1} \atop {4-1}} \} = \left \{ {{23} \atop {3}} \}\)

C) This is also the number of Non-negative integer solutions but in this case the value of C ≥ 3

hence the number of ways to select a handful of 20 jellybeans that contains at least 3 red

= \(\left \{ {{17+4+1} \atop {4-1}} \} = \left \{ {{20} \atop {3}} \}\)

D) In this case the value of C ≥ 3 and B ≤ 2

Hence the number of ways to select a handful of 20 jellybeans that contains at least 3 red and at most 2 orange

= \(\left \{ {{20} \atop {3}} \} - \left \{ {{17} \atop {3}} \}\)

solve pls brainliest!

solve pls brainliest!

Answers

Hello!

-b+7y

b=4

y=-3

-4+7(-3)

-4-21

-25

Hope it helps!

~Just a joyful teen

\(GraceRosalia\)

Answer:

69 is the answer

-4 plus 73 equals 69

Why? because you have to subtract -4 because is negative and the answer will not be correct.

Lois and her team used the number of red candies in a
small 9 ounce bag to predict the number of red candies in
a large 33 ounce bag. If Lois counted 12 red candies in the
small bag, Predict the number of red candies in the large bag.
Use proportional reasoning and show algebraic work.

Answers

Using proportional reasoning, we can predict that there will be 40 red candies in the large bag.

Using proportional reasoning, we can set up and solve the following equation to determine the number of red candies in the large bag:

P = Proportion of red candies in the large bag

R = Red candies in the small bag

R × (33/9) = P

12 × (33/9) = P

P = 40 red candies in the large bag

Therefore, using proportional reasoning, we can predict that there will be 40 red candies in the large bag.

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can someone please help me

can someone please help me

Answers

64 because 4 turns into -8 -8 turns into 16 and 16 turns into -32 so it must be 64

64 is the right answer

Find the standard deviation of the sampling distribution of sample means using the given information. Round to one decimal place, if necessary. μ = 64 and o = 12; n = 9​

Answers

The standard deviation of the data sample is 2.55.

What is the standard deviation of the data sample?

The standard deviation of the data sample is calculated by applying the following formula;

S.D = √ (x -  μ)²/(n - 1)

where;

μ is the mean of the distributionx is the sample datan is the number of sample data

The given parameters;

mean,  μ = 64

x, = 12

number of samples = 9

The standard deviation of the data sample is calculated as;

S.D = √ (12 -  64)²/(9 - 1)

S.D = 2.55

Thus, the standard deviation of the data sample is calculated by applying the formula for standard deviation.

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what are 567 times 3

Answers

Answer:

1,701

Step-by-step explanation:

the answer is 1,701 :D

m.
x-intercept =
1/2
and y-intercept = 3
Write an equation for the line in point-slope form and in slope-intercept form

Answers

Answer:

slope intercept form: y= -6x+3

point slope form: y-0= -6(x -1/2)

Step-by-step explanation:

point slope form: y - y1 = m(x - x1)

substitute the values  y-0=-6(x-1/2)

slope intercept form:

find the slope using two given points

m = (y2 - y1) / (x2 - x1)

= (3 - 0) / (0 - 1/2)

= 3 / (-1/2)

= -6

substitute into equation

y= -6x+3

Name three collinear points.

Name three collinear points.

Answers

Answer:

D, G and F  or I, G and J

------------------------

Collinear points are the points on the same line.

There are two lines in the diagram.

The collinear points:

D, G and F on one lineI, G and J on the second line

The points that are collinear are  D,G and E  and another set of points which are collinear are L,G and J.

The points which lie on the same straight line are known as collinear points.

Similarly, if three or more number of points are collinear then they form a straight line.

If we observe the figure, the points D,G and E are collinear points as they are on same line.

Similarly the points L, G and H are in the straight line which makes them collinear.

Therefore , the points L,G and J are collinear points.

Hence, the points that are collinear are  D,G and E and another set of points which are collinear are L,G and J

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Pls brainlest ASAP and add extra points for correct answer

Pls brainlest ASAP and add extra points for correct answer

Answers

Answer:

glucose, sunlight and oxygen on the left (they go in the cell)

water and carbon dioxide on the right (they go out of the cell)

Use π = \frac{22}{7}: Henry bought exactly the right amount of fencing to put around his circular herb garden, which has a diameter of 14 feet. Then he decides to make the garden larger by doubling the diameter. How much more fencing does Henry need to purchase to enclose the new garden?

Answers

The answer of the given question based on the circle is , Henry needs to purchase an additional 44 feet of fencing to enclose the new garden.

What is Circumference?

Circumference is distance around edge of  circular object. It is same as  perimeter of  circle. The circumference of a circle can be calculated using the radius of the circle, which is half the diameter.

The circumference of  circle with diameter d is given :

C = πd

Using the given diameter of 14 feet, the circumference of the original garden is:

C1 = πd1 = (22/7) * 14 = 44 feet

When the diameter is doubled to 28 feet, the circumference of the new garden is:

C2 = πd2 = (22/7) * 28 = 88 feet

To find how much more fencing Henry needs to purchase to enclose the new garden, we need to subtract the original circumference from the new circumference:

C2 - C1 = 88 - 44 = 44 feet

Therefore, Henry needs to purchase an additional 44 feet of fencing to enclose the new garden.

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what is the product of -3 and +50​

Answers

Answer:

the product of -3 and +50 is -150

(-3)×+(50)=-150

Answer:

-150

Step-by-step explanation:

-3 × 50 =

-150

Let f(x)=x^2-4x+3. Find each value. Simplify the answer as much as possible. To enter exponents, use ^ as in x^2 for x^2
a.f(-3)=
b.f(0)
c.f(5)
d.f(a)
e.f(a-2)

Let f(x)=x^2-4x+3. Find each value. Simplify the answer as much as possible. To enter exponents, use

Answers

The value of the function are as follows:

a. f(-3) = 24

b. f(0) = 3

c. f(5) =  8

d. f(a) =  (a - 3)(a - 1)

e. f(a - 2) = (a - 5)(a - 3)

How to solve function?

f(x) = x²- 4x + 3

a.

f(-3) = (-3)² - 4(-3) + 3 = 9 + 12 + 3 = 21 + 3 = 24

b.

f(0) = (0)² - 4(0) + 3 = 0  - 0 + 3 = 3

c.

f(5) = (5)² - 4(5) + 3 = 25 - 20 + 3 = 5 + 3 = 8

d.

f(a) = (a)² - 4(a) + 3 = a² - 4a + 3 = (a - 3)(a - 1)

e.

f(a - 2) = (a - 2)² - 4(a - 2) + 3 = (a - 2)(a - 2) - 4a + 8 + 3 = a² - 2a - 2a + 4 - 4a + 11 = a² - 4a  - 4a + 4 + 11 = a² - 8a + 15 = (a - 5)(a - 3)

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Seth is using the figure shown below to prove Pythagorean Theorem using triangle similarity:


In the given triangle ABC, angle A is 90° and segment AD is perpendicular to segment BC.


The figure shows triangle ABC with right angle at A and segment AD. Point D is on side BC.


Which of these could be a step to prove that BC2 = AB2 + AC2?

possible answers -
By the cross product property, AB2 = BC multiplied by BD.
By the cross product property, AC2 = BC multiplied by BD.
By the cross product property, AC2 = BC multiplied by AD.
By the cross product property, AB2 = BC multiplied by AD.

Seth is using the figure shown below to prove Pythagorean Theorem using triangle similarity:In the given

Answers

The correct step to prove that \(BC^2 = AB^2 + AC^2\) is:

By the cross product property, \(AC^2 = BC \cdot AD\).

To prove that \(BC^2 = AB^2 + AC^2\), we can use the triangle similarity and the Pythagorean theorem. Here's a step-by-step explanation:

Given triangle ABC with right angle at A and segment AD perpendicular to segment BC.

By triangle similarity, triangle ABD is similar to triangle ABC. This is because angle A is common, and angle BDA is a right angle (as AD is perpendicular to BC).

Using the proportionality of similar triangles, we can write the following ratio:

\($\frac{AB}{BC} = \frac{AD}{AB}$\)

Cross-multiplying, we get:

\($AB^2 = BC \cdot AD$\)

Similarly, using triangle similarity, triangle ACD is also similar to triangle ABC. This gives us:

\($\frac{AC}{BC} = \frac{AD}{AC}$\)

Cross-multiplying, we have:

\($AC^2 = BC \cdot AD$\)

Now, we can substitute the derived expressions into the original equation:

\($BC^2 = AB^2 + AC^2$\\$BC^2 = (BC \cdot AD) + (BC \cdot AD)$\\$BC^2 = 2 \cdot BC \cdot AD$\)

It was made possible by cross-product property.

Therefore, the correct step to prove that \(BC^2 = AB^2 + AC^2\) is:

By the cross product property, \(AC^2 = BC \cdot AD\).

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Answer the questions below. I need answer for letter (c)

Answer the questions below. I need answer for letter (c)

Answers

Answer:

C is the answer, please choose the letter C that's the answer

A printing service charges a set up fee of 14.50 for each order and 8 cent more for each copy the total cost is C in dollars for and order of X copies is given by the following function C(X)=0.08x+14.50. What is the total cost for 40 copies Please help

Answers

Step-by-step explanation:

In order to get the answer first you figure out the type of equation. In this case this is a linear equation, y=mx+b

The B or the y-intercept/base is the first step. Here, it says a fee of 14.50 is needed for each order.

The mx part will be the .08 cents needed for each copy.

y= .08x+14.50 is the equation....

The copies needed is 40 which is the x in the situation:

y=.08(40)+14.50....

.08 * 40 is 3.2 then add the base of 14.50 which is: 17.70 all together

WILL MARK BRAINLIEST PLS HELP

WILL MARK BRAINLIEST PLS HELP

Answers

⇒For m=2 and n=-3 in the equation 3m-4n In the place of m plug in 2 and in the place of n plug in -3 and simplify.

\(=3(2)-4(-3)\\=6+12\\=18\)

Option C is the answer.

what is fhe solution of the system of these equations? (i’m giving brainliest)

what is fhe solution of the system of these equations? (im giving brainliest)

Answers

Answer:

Top-left system: (3,5)

Bottom-right

system: (-1,0)

Step-by-step explanation:

One way to solve a system of equations is to graph them. The solution is the point of intersection (where the lines cross). If you need to give the x-value and y-values separately, the first number in the pair is the x and the second number is the y.

How do I write an equation for this relationship (where y represents the number of blocks and x represents the stage number).

How do I write an equation for this relationship (where y represents the number of blocks and x represents

Answers

The equation of the line is y = 4x + 1 , where the slope of the line is m = 4

What is an Equation of a line?

The equation of a line is expressed as y = mx + b where m is the slope and b is the y-intercept

And y - y₁ = m ( x - x₁ )

y = y-coordinate of second point

y₁ = y-coordinate of point one

m = slope

x = x-coordinate of second point

x₁ = x-coordinate of point one

The slope m = ( y₂ - y₁ ) / ( x₂ - x₁ )

Given data ,

Let the equation of line be represented as A

Now , the value of A is

Let the number of blocks be y

Let the stage number be x

Let the first point be represented as P = P ( 1 , 5 )

Let the second point be represented as Q = Q ( 2 , 9 )

Now , the slope of the line between the points be

Slope m = ( y₂ - y₁ ) / ( x₂ - x₁ )

Substituting the values in the equation , we get

Slope m = ( 9 - 5 ) / ( 2 - 1 )

Slope m = 4

Now , the equation of line is y - y₁ = m ( x - x₁ )

Substituting the values in the equation , we get

y - 5 = 4 ( x - 1 )

On simplifying the equation , we get

y - 5 = 4x - 4

Adding 5 on both sides of the equation , we get

y = 4x + 1

Therefore , the value of A is y = 4x + 1

Hence , the equation of line is y = 4x + 1

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the diagram shows a right angled triangle. 9cm 15cm x degrees. Find the size of angle x. Give your answer correct to 1 decimal place.​

the diagram shows a right angled triangle. 9cm 15cm x degrees. Find the size of angle x. Give your answer

Answers

Answer:

31°

Step-by-step explanation:

As the opposing side and adjacent side of the angle x are given, we need to take the tan ratio of the angle.

=============================================================

Solving :

⇒ tan x° = 9/15

⇒ tan x° = 3/5

⇒ x = tan⁻¹ (0.6)

⇒ x = 31°

Given:Opp= 9 cmAdj= 15 cmNote that:Opp= Opposite Adj= Adjacent To find:

The size of the unknown angle "x"

Solution:

We'll have to check which is the appropriate one from SOHCAHTOA.

In this question we'll have to use tan because opposite and adjacent is given.

\(\large\boxed{Formula: tan(A)= \frac{opp}{adj}}\)

Substitute according to the formula.

\(tan \: x= \frac{9}{15}\)

We'll have to use tan inverse.

\(x={tan}^{-1}(\frac{9}{15})\)

\(x=30.96375653\)

\(\large\boxed{x=31° }\)

Hence, the size of the unknown angle "x" is 31°

Solve the inequality c+2/5≥11/5, and write the solution in interval notation

Answers

Answer:

[9/5,∞)

Step-by-step explanation:

Rearrange variables to the left side of the equation: c ≥ 11/5-2/5

Calculate: c ≥ 9/5

Express solution set in interval notation: [9/5,∞)

(QUICK DUE IN 50 MINUTES)

What is the slope?

Simplify your answer and write it as a proper fraction, improper fraction, or integer.

(QUICK DUE IN 50 MINUTES)What is the slope?Simplify your answer and write it as a proper fraction, improper

Answers

Slope =2/3
70,80) (10,40)
(80-40)/(70-10) = 40/60
4/6
2/3


A thread of length 52.31 cm is bent to form a circle.
What is the radius of the circle?
Use a = 3.14 and round your answer to the nearest hundredth.


Answers

8.33 bc 52.31 divided by 3.14 = 16.874… and then divided that by two

We saw that about 34% of
all students received at least one referral. Suppose we have concerns about the number of
disciplines in one particular school - it seems very high, and we've had concerns from parents at the school. In one particular year, 162 out of the 340 students at that school had a referral.
a. If we selected a random sample of 340 students, would the sample proportion that are
disciplined be approximately normally distributed? Why or why not?
b.
Use the normal distribution to find the probability of randomly selecting a sample of 340
students and finding that 162 of them or more have received a referral during that
particular year.
C. Would we think that is unusual? Explain your reasoning.

Answers

The likelihood of discovering a z-score of 4.39 or higher with a regular normal distribution table or calculator is extremely low, roughly 0.00001.

what is probability ?

It is a scale among 0 and 1 that represents the probability or likelihood of an event happening. In many disciplines, including statistics, physics, economics, law, and computer science, probability theory is extensively used. Many situations, such as games of chance, weather predictions, medical diagnoses, and more, can be explained using the concept of probability. The mathematical computation of probabilities, the analysis for random variables, and the conclusion-making process are all included in the study of probability.

given

The likelihood that 162 or more kids in a randomly chosen sample of 340 pupils will have received a referral in that particular year can be calculated using the normal distribution.

Calculating the sample proportion is necessary:

The predicted value of p is equal to the 0.34 underlying proportion of referred pupils. It is possible to compute the sample proportion's standard deviation as follows:

P equals sqrt[p(1-p)/n] = sqrt[0.34(1-0.34)/340] = 0.031

Calculate the z-score to determine the likelihood of locating 162 or more kids with referrals:

\(z = (0.476 - 0.34) / 0.031 = 4.39\)

The likelihood of discovering a z-score of 4.39 or higher with a regular normal distribution table or calculator is extremely low, roughly 0.00001.

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Determine the value of y for the inequality 2 times the quantity y plus one third end quantity is greater than two thirds. y is greater than negative 1 over 36 y is less than negative 1 over 36 y > 0 y < 0

Answers

The value of y for the inequality is y  >  0

How to determine the value of y for the inequality?

An inequality compares two values, showing if one is less than, greater than, or simply not equal to another value e.g. 5 < 6, x ≥ 2, etc.

The inequality 2 times the quantity y plus one third end quantity is greater than two thirds can be written as:

2(y + 1/3) > 2/3

To determine the value of y in the inequality, you need to solve for y. That is:

2(y + 1/3) > 2/3  

y + 1/3 > 1/3     (Divide both sides by 2)

y > 1/3 - 1/3     (Collect like terms)

y > 0

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What can be inferred from thefollowing statement from the essay'Progress in Play: Board Games andthe Meaning of History' by AlexAndriesse?"depicts a martial female figureholding a Union Jack shield" An investor has just entered 3 short palladium futures contracts at a futures price of $1,815 per troy ounce. The size of each contract is 100 troy ounces. The initial margin is $20,000 per contract and the maintenance margin is $15,000 per contract. A month after opening the position the futures price rises to $1,974 per barrel. What is the balance of the total margin account at the end of the month? (Assume that no margin call has occurred over this period and your answer should be to the nearest dollar, without the dollar sign.) john and sue are expecting a child, but are concerned about a rare autosomal recessive disease that is present in both of their families. in the pedigree, john is represented as individual iii11 and sue is represented as individual iii12; both are unaffected. john's sister, iii10, and sue's brother, iii13, both do not show evidence of the disease, but john's paternal grandmother and sue's maternal grandfather both had the disease. assign the appropriate symbol to each individual in the pedigree. sThe equilibrium level of real GDP is $1,000, the target level of real GDP is $1,250, and the marginal propensity to consume (MPC) is 0.60. The target can be reached if government spending is: helpp me I'm almost done with hwww Pioneer plant species could be described as those that? A) sprout from seeds after a Forest fire. B) are slow to mature, and require a soil with well-balanced nutrients C) are small in size, and highly effective means of dispersing Their seeds You are analyzing rocks that contain small amounts of potassium-40 and argon- 40. The half-life of potassium-40 is 1.25 billion years. Assume that when the rocks initially formed they did not contain any argon-40.(a) You find a rock that contains equal amounts of potassium-40 and argon-40. How old is it? Explain.(b) You find a rock that contains three times as much argon-40 as potassium-40. How old is it? Explain. Match each label below with the appropriate term. Note: there may be more than one correct answer.A Lewis diagram: two atoms of upper C l connected by a single bond. Both atoms have two electrons above, below, and to the outside of the pair. Arrow a points to the bond; arrow b to the electron dots below the left atom. A second diagram shows upper O single bonded to upper H to the left and below, with two electron dots above and to the right. Arrows c point to each of the bonds.anonbonding electronssigma bondrepresents two electronsbnonbonding electronssigma bondrepresents core electronscnonbonding electronsbonding electronssigma bond The process of selecting a subset of people from a population such that every person in the population has an equal chance of being chosen for the subset is called: Read this statement about Amelia Earhart.She had devoted fans who had trouble with the idea that she was dead.Which sentence from the text BEST supports this inference?A.The U.S. Navy conducted a massive search for Earhart and Noonan that continued for more than two weeks.B.Unable to accept that Earhart had simply disappeared and perished, some of her admirers believed that she was a spy.C.No one knows for sure what happened, but many people believe they got lost and simply ran out of fuel and died.D.Amelia Earhart was less than a month away from her fortieth birthday. Which statement correctly describes a supersaturated solution?A) it is possible to dissolve more solute into the solutionB) more solute than i normally possible is dissolvedC) the solution is made of pure solute and containsD) it is not possible to dissolve more solute into the solution Examine the equation.C3H8+ O2 CO + HOWhat is the balanced equation?O C3H8 +5023CO2 + 4HOO C3Hs+ O2-3CO2 + 4HOO C3H8 +302 2CO2 + 2HOO C3H8+ O2 C302 + HO what carbonyl compound and grignard reagent could be used to prepare 2-butanol? T/F? You are providing care to a person who has fallen down her front stairs. The victim's skin has a bluish tent, which indicates that her blood vessels are constricted from the fall. A nearsighted woman has a far point of 300 cm. What kind of lens, converging or diverging, should be prescribed for her to see distant objects more clearly? What refractive power should the lens have? Its all log base 10 I need help with all of them 4. a fellow student showed you a gram stained slide where cells containing lps were stained purple. what would you tell her about the staining procedure? why? Propose an experiment to test the rate of meat digestion in animals with differing amounts of the enzyme pepsin in their digestive tracts. Be sure to include the independent and dependent variables, along with the specific procedure and materials to be used. If you could visit one city in the world, what city would you like to see? Explain why ( speaking part) HELP ASAP!!!! Need to get grade up