Answer:
1.462 × 10^20
Step-by-step explanation:
Multiplication proceeds in the usual way. The rules of exponents apply. A final exponent adjustment is needed to put the number in scientific notation form. (Your calculator can do all of this for you.)
(4.3×10^12)(3.4×10^7) = (4.3×3.4)×(10^12×10^7) = 14.62×10^(12+7)
= 14.62×10^19
= (1.462×10)×10^19 = 1.462×10^(1+19)
= 1.462×10^20
_____
The rule of exponents used is ...
(a^b)(a^c) = a^(b+c)
_____
I find it works well to estimate whether the product of the mantissas will be more than 10, then make adjustments to exponents before the multiplication:
(4.3×10^12)(3.4×10^7) = (4.3×10^12)(0.34×10^8) = 1.462×10^(12+8)
= 1.462×10^20
1. Explain how to write 1.25 divided by 0.8 three ways.
Answer:
Step-by-step explanation:
1.25/.8=a
\(\frac{5}{4} /\frac{4}{5}\)
1.25/4/5
what is the slope of the line shown
out of 139 7th graders, 86 voted math as their favorite subject. what percent is this?
Answer:
61.9%
Step-by-step explanation:
percent = part/whole × 100%
part = 86
whole = 139
percent = 86/139 × 100%
percent = 61.9%
Answer:
The percent is:
61.87%
Step-by-step explanation:
86 / 139 = 0.6187
0.6187 * 100 = 61.87%
Jalen and his 2 brothers each ate 3/4 of a cupcake how many cupcakes did they eat altogether
Answer:
9/4 cupcakes or 2 and 1/4
Step-by-step explanation:
3/4 times 3 or 3/1
T=PV/k, determined P when T=80, V=20 and K= 0.5
We have the following equation:
\(T=\frac{PV}{k}\)since we need P, we must move k and V to the left hand side as
\(P=\frac{k\cdot T}{V}\)By substituting the given values, we get
\(\begin{gathered} P=\frac{(0.5)(80)}{20} \\ P=\frac{40}{20} \\ P=2 \end{gathered}\)that is, P is equal to 2.
someone tell me the slope
Answer:
-8/3
Step-by-step explanation:
since it's going downwards it's negative and it does 4y by x square so it would be -8/3
, hope it helps
In 2005, the population of a state was 31,006,000. If the population grows at 1.2% per year, approximately how
many years (from 2005) will it take the population to reach 40,000,000? (Assuming it grows at the same rate)
use the continuous growth function:
A=pen
150 years
249 years
21 years
26 years
Answer:
Step-by-step explanation:
Population of the state will reach 40,000,000 in 21 years from year 2005.
Option (3) will be the correct option.
Exponential growth of the poulation: Exponential growth for the population growth is given by the expression,
F = I(1 + r)ⁿ
Here, F = Final population
I = Initial population
r = Growth rate
n = Number of years for population growth
Given in the question,
Initial population = 31006000Growth rate = 1.2%Final population = 40000000To find the number of years for population growth, substitute the values,
F = I(1 + r)ⁿ
40000000 = 31006000(1 + 0.012)ⁿ
40000 = 31006(1.012)ⁿ
\((1.012)^n=\frac{40000}{31006}\)
\(\text{log}(1.012)^n=\text{log}(1.29)\)
nlog(1.012) = log(1.29)
0.00518n = 0.11059
n = \(\frac{0.11059}{0.00518}\)
n = 21.34
n ≈ 21 years
Therefore, population of the state will reach 40,000,000 in 21 years from 2005. Option (3) will be the answer.
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Simplify the following and express your answers in positive exponent form:
Qii)
one over y squared multiply by t squared
Find the unit rate (constant of proportionality) of the distance traveled.
Number of hours
0.25 1.5 2.5 3
Distance traveled (km) 3 18 30 36
Answer:
12.
Step-by-step explanation:
if to re-write the given condition, then
\(\frac{3}{0.25} =\frac{18}{1.5} =\frac{30}{2.5} =\frac{36}{3} ;\)
it is clear, the required constant is 12 (12 per hour).
The map shows an obstacle course at a school fair. The units are given in yards.
What is the total distance of
the obstacle course?
? yards
Start
(-40, -10)
Tire
Race
(-40, -30)
Finish
(10, 20)
Monkey
Bars
(40,20)
Rope
Climb
(40,-30)
The total distance of the obstacle course can be calculated by finding the distance between each pair of consecutive points and adding them up. The distance between two points (x1, y1) and (x2, y2) can be calculated using the formula: distance = sqrt((x2 - x1)^2 + (y2 - y1)^2).
Using this formula, we can calculate the distances between each pair of consecutive points as follows:
Start to Tire Race: distance = sqrt((-40 - (-40))^2 + (-30 - (-10))^2) = 20 yards
Tire Race to Rope Climb: distance = sqrt((40 - (-40))^2 + (-30 - (-30))^2) = 80 yards
Rope Climb to Monkey Bars: distance = sqrt((40 - 40)^2 + (20 - (-30))^2) = 50 yards
Monkey Bars to Finish: distance = sqrt((10 - 40)^2 + (20 - 20)^2) = 30 yards
Adding up all these distances, we get a total distance of 20 + 80 + 50 + 30 = 180 yards for the obstacle course.
Kerry invited 23 friends to his pool party. They played a game where everyone had to separate into groups. Each group had the same number of children.The game could not be played with all 24 children in one group and each group had to have more than two children. Which of the following are ways that they could divide into groups? Choose all that apply.
Answer:
24:
6 of 4
or
8 of 3
Step-by-step explanation:
6x4=24
8x3=24
Deion was the lucky journalist assigned to cover the Best Beard Competition. He recorded the contestants' beard colors in his notepad. Deion also noted if the contestants were signed up for the mustache competition later in the day. Dark beard Light beard Only in the beard competition 4 3 Also in the mustache competition 3 2 What is the probability that a randomly selected contestant is only in the beard competition and has a light beard?
a survey shows that in every hour of television,13 minutes are taken up by advertising.what fraction is this?
the fraction of the hour that is taken up by advertising is 13/60.
Define fractionA fraction is a measure of a ratio between two numbers or a portion of an entire. The numerator is the number above the line, while the denominator is the number below the line. The numerator is the number of the equal parts that make up the whole that are being taken into consideration, whereas the denominator is the total number of equal parts into which the whole is split.
convert 13 minutes to hours.
1 hour = 60 minutes
So, 13 minutes is = 13/60 hours
We can now express this as a fraction:
13/60
Therefore, the fraction of the hour that is taken up by advertising is 13/60.
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A shirt normally costs $22.50 and is on sale for 12% off. What is the sale price?
Answer:
$19.8($2.7 subtracted off)
Step-by-step explanation:
\(P = 22.5(1 - 12\%)\\P = 22.5(1 - 0.12)\\P = 22.5(0.88)\\P = 19.8\)
(easy points)
If it is now November, what month will it be in 17 months? *
November
January
March
April
Answer:
April
Step-by-step explanation:
If you add 12 months it will be November once more. Then add 5 months which is April.
In the figure, side AB is given by the expression 1 + 3, and side BC is 21 – 4.
The simplified expression for the area of rectangle ABCD is
Answer:
\(\text{Area}=\frac{15(x+1)}{2(x-2)}\)
Step-by-step explanation:
Length of the rectangle given in the picture = \(\frac{5x+5}{x+3}\)
Width of the rectangle = \(\frac{3x+9}{2x-4}\)
Area of the rectangle = Length × Width
= \(\frac{5x+5}{x+3}\times \frac{3x+9}{2x-4}\)
= \(\frac{5(x+1)}{x+3}\times \frac{3(x+3)}{2(x-2)}\)
= \(\frac{15(x+1)(x+3)}{2(x+3)(x-2)}\)
= \(\frac{15(x+1)}{2(x-2)}\)
Therefore, area of the given rectangle is \(\frac{15(x+1)}{2(x-2)}\).
(x4 – x² – 30) ÷ (x² + 5)
Answer:
To divide (x^4 - x^2 - 30) by (x^2 + 5), we can use long division. The steps are as follows:
x² - 1
---------------------
x² + 5 | x⁴ - x² - 30
- (x⁴ + 5x²)
---------------
-6x² - 30
-(-6x² - 30)
-------------
0
Therefore, the quotient is x² - 1 and there is no remainder.
So, (x^4 - x^2 - 30) ÷ (x^2 + 5) = x^2 - 1.
I need help with that one anyone can help me please
Answer:
11: 1 tens, 1 ones 17: 1 tens, 7 ones 17 is greater number, it is greater by 6
The unemployment compensation is calculated by finding the total of the quarterly wages of two consecutive quarters and dividing by 26. The weekly employment is 60% of that amount. In the quarter of January, February, and March, Roger made a total of $12,950.80. In the quarter of April,May, and June, he made a total of $12,250.10. Find Roger’s weekly unemployment amount.
Therefore , the solution of the given problem of percentage comes out to be $387.704 is the weekly unemployment amount.
Define percentage.In mathematics, a percentage is any amount that can be stated as a proportion of 100. Also occasionally used are the abbreviations "pct.," "pct," or "pc." But the "%" mark is usually used to indicate it. The proportional amount is flat and lacks any dimensions. Since percentages have a numerator of 100, they can be thought of as fractions. A number should be preceded by the percent sign (%) to denote it is a percent.
Here,
Given :
A weekly unemployment amount is calculated using the following three components:
1. Determine the quarterly wage total (consecutive)
2. Multiply the sum by 26.
3.Multiplying by the rate of unemployment
Calculate the total of a quarterly salaries first:
=> (12950.80 + 12250.10) / 26
=> 25,200.9/26
=> 969.26 * 40 %
=> 387.704
Therefore , the solution of the given problem of percentage comes out to be $387.704 is the weekly unemployment amount.
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HELP ME PLEASE! DUE TODAY
NUMBER 14
file:///C:/Users/rmadh/Downloads/Geo%20Unit%208%20Test%20(1).pdf
Answer:
Sorry it did not load
Step-by-step explanation:
Answer:
the file includes stragetic sth
Step-by-step explanation:
EASY POINTS!
Winter has just begun. After one week, the temperature decreased by 46.8° with a
percent change of 72%. What was the temperature at the beginning of the week and
what is the temperature now?
Answer:Can somebody also help me with this. i'm confused please hurry!
Step-by-step explanation:
A letter is randomly chosen from the word bell and another letter is chosen randomly from the word beep. How do I draw a tree diagram for this
To draw a tree diagram for randomly choosing a letter from the word "bell" and another letter from the word "beep," follow these steps:
Step 1: Start by drawing a horizontal line. This line represents the first letter selection.
Step 2: Label the branches of the first letter selection with the letters from the word "bell": b, e, l, and l. Each branch represents one of these letters being selected.
Step 3: Extend each branch from Step 2 by drawing vertical lines. These lines represent the second letter selection.
Step 4: Label the branches of the second letter selection with the letters from the word "beep": b, e, e, and p. Each branch represents one of these letters being selected.
Step 5: Connect each branch of the first letter selection (from Step 2) to the corresponding branches of the second letter selection (from Step 4). This creates the complete tree diagram.
Thus, this way, one can create tree diagram.
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5x5=? someone help please
Answer:
25
Step-by-step explanation:
Makesha lost 60 pounds in 16 weeks. Find her rate of loss in pounds per week
Her rate loss in pounds per week is given as follows:
3.75 pounds per week.
How to obtain her rate loss?Her rate loss in pounds per week is obtained applying the proportions in the context of the problem.
A proportion is applied as the rate loss is given by the division of the loss by the number of weeks.
The parameters are given as follows:
Loss of 60 pounds.Time of 16 weeks.Hence the rate loss is given as follows:
r = 60/16
r = 3.75 pounds per week.
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A Norman window has the shape of a rectangle surmounted by a semicircle. Suppose the outer perimeter of such a window must
be 600 cm. In this problem you will find the base length a which will maximize the area of such a window. Use calculus to find
an exact answer.
When the base length is zero, the area of the window will be zero. There is also a limit on how large scan be: when x is large
enough, the rectangular portion of the window shrinks down to zero height. What is the exact largest value of r when this
occurs?
Largest x = ?
The base length that will maximize the area for such a window is 168.03 cm. The exact largest value of x when this occurs is 233.39 cm
Suppose we make an assumption that:
(x) should be the width of the rectangle base;(h) should be the height of the rectangleAlso, provided that the diameter of the semi-circle appears to be the base of the rectangle, then;
the radius \(\mathbf{r = \dfrac{x}{2}}\)and, the perimeter of the window can now be expressed as:
\(\mathbf{x + 2h + \pi r = x + 2h + \dfrac{\pi x }{2}}\)
\(\mathbf{= \Big ( 1 + \dfrac{\pi}{2}\Big) x + 2h}\)
Given that the perimeter = 600 cm
∴
\(\mathbf{ \Big ( 1 + \dfrac{\pi}{2}\Big) x + 2h= 600}\)
\(\mathbf{ h = 300 - \Big( \dfrac{1}{2} + \dfrac{\pi}{4}\Big) x}\)
Since h > 0, then:
\(\mathbf{ h = 300 - \Big( \dfrac{1}{2} + \dfrac{\pi}{4}\Big) x>0}\)
By rearrangement and using the inverse rule:
\(\mathbf{ x< \dfrac{ 300}{\Big( \dfrac{1}{2} + \dfrac{\pi}{4}\Big) } }\)
\(\mathbf{ x= \dfrac{ 1200}{\Big( 2 +\pi \Big) } }\)
\(\mathbf{ x= 233.39 \ cm }\)
Thus, the largest length x = 233.39 cm
However, the area of the window is given as:
\(\mathbf{A(x) = xh + \dfrac{1}{2} \pi r^2}\)
\(\mathbf{A = x \Big [ 300 - \Big ( \dfrac{1}{2}+\dfrac{1}{4} \Big) x \Big ] +\dfrac{1}{2}\pi \Big(\dfrac{x}{2} \Big )^2}\)
\(\mathbf{A (x) = 300x - \Big( \dfrac{1}{2} + \dfrac{\pi}{8}\Big) x^2 \ cm^2}\)
Now, at maximum, when the area A = 0. Taking the differentiation, we have:
\(\mathbf{\dfrac{d}{dx} 300x - \dfrac{d}{dx} \Big( \dfrac{1}{2} + \dfrac{\pi}{8}\Big) x^2 \ =0}\)
\(\mathbf{ 300 - 2x \Big( \dfrac{1}{2} + \dfrac{\pi}{8}\Big) \ =0}\)
Making x the subject of the formula, we have:
\(\mathbf{x = \dfrac{1200}{4 +\pi}}\)
x = 168.03 cm
Taking the second derivative:
\(\mathbf{\dfrac{d}{dx} \Big [300 -2x \Big( \dfrac{1}{2} + \dfrac{\pi}{8}\Big) \Big]}\)
\(\mathbf{= -2 \Big( \dfrac{1}{2}+\dfrac{\pi}{8}\Big ) <0}\)
Therefore, we can conclude that the maximum area that exists for such a window is 168.03 cm
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An arrow is shot from 3 ft above the top of a hill with a vertical upward velocity of 108 ft/s. If it strikes the plain below after 9.5 s, how high is the hill?
If the arrow is launched at t0, then write an equation describing velocity as a function of time?
The height of the hill is approximately 25.73 ft. Where v0 is the initial velocity (108 ft/s), g is the acceleration due to gravity \((-32.2 ft/s^2)\),
To find the height of the hill, we can use the formula for the vertical position of an object under constant acceleration:
h = h0 + v0t + 1/2at^2
where h is the final height, h0 is the initial height, v0 is the initial velocity, t is the time, and a is the acceleration due to gravity (-32.2 ft/s^2).
In this case, we are given that the initial height h0 is 3 ft, the initial velocity v0 is 108 ft/s, and the time t is 9.5 s. We want to find the height of the hill, which we can denote as h_hill. The final height is the height of the plain, which we can denote as h_plain and assume is zero.
At the highest point of its trajectory, the arrow will have zero vertical velocity, since it will have stopped rising and just started to fall. So we can set the velocity to zero and solve for the time it takes for that to occur. Using the formula for velocity under constant acceleration:
v = v0 + at
we can solve for t when v = 0, h0 = 3 ft, v0 = 108 ft/s, and a = -32.2 ft/s^2:
0 = 108 - 32.2t
t = 108/32.2 ≈ 3.35 s
Thus, it takes the arrow approximately 3.35 s to reach the top of its trajectory.
Using the formula for the height of an object at a given time, we can find the height of the hill by subtracting the height of the arrow at the top of its trajectory from the initial height:
h_hill = h0 + v0t + 1/2at^2 - h_top
where h_top is the height of the arrow at the top of its trajectory. We can find h_top using the formula for the height of an object at the maximum height of its trajectory:
h_top = h0 + v0^2/2a
Plugging in the given values, we get:
h_top = 3 + (108^2)/(2*(-32.2)) ≈ 196.78 ft
Plugging this into the first equation, we get:
h_hill = 3 + 108(3.35) + 1/2(-32.2)(3.35)^2 - 196.78
h_hill ≈ 25.73 ft
If the arrow is launched at t0, the equation describing velocity as a function of time would be:
v(t) = v0 - gt
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the sum of two numbers is 61 the smaller number is 21 less than the larger number what are the numbers
Divide 17.9 by 2.38. Round your answer to the nearest tenth.
7.5
0.7
0.8
7.6
Answer:
7.5
Step-by-step explanation:
7.52100840336
The figure shows four box-and-whisker plots. These represent variation in travel time for four different types of transportation from the beginning to the end of one route.
Conrad is at one end of the route. He is trying to decide how to get to an appointment at the other end. His appointment is in 30 minutes. Which type of transportation is LEAST likely to take more than 30 minutes?
Select one:
a.
bus
b.
car
c.
subway
d.
train
Comparing the median of each box-and-whisker plot, the type of transportation that is LEAST likely to take more than 30 minutes is: d. train.
How to Interpret a Box-and-whisker Plot?
In order to determine the transportation that is LEAST likely to take more than 30 minutes, we have to compare the median of each data set represented on the box-and-whisker plot for each transportation.
The box-and-whisker plot that has the lowest median would definitely represent the the transportation that is LEAST likely to take more than 30 minutes, since median represents the typical minutes or center of the data.
Therefore, from the box-and-whisker plots given, the one for train has the lowest median. Therefore train would LEAST likely take more than 30 minutes.
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I need help! This is due in 30 minutes!!!
Answer:
Complementary
Step-by-step explanation:
You are correct.
Answer:
Complementary
Step-by-step explanation:
b + a = 90 degrees.
complementary is 2 angles that add up to 90 degrees