The base of a triangular prism is a right triangle with a base of 10 inches, a height of 24 inches, and a third side length of 26 inches. The height of the prism is 20 inches. Find the surface area of the prism.
The surface area of the prism is 840 square inches.
What is Prism?
A prism is a three-dimensional geometric shape that has two identical parallel bases and straight sides that connect the bases. The sides of a prism are typically rectangular, but can also be triangular or other polygonal shapes.
To find the surface area of the triangular prism, we need to find the area of the two triangular bases and the three rectangular faces.
Area of the triangular base:
The base is a right triangle with base 10 inches and height 24 inches. Therefore, the area of the base is:
(1/2) x base x height = (1/2) x 10 x 24 = 120 square inches.
Area of the rectangular faces:
The rectangular faces are all congruent, with dimensions of 10 inches by 20 inches. Therefore, the area of each rectangular face is:
length x width = 10 x 20 = 200 square inches.
There are three rectangular faces, so the total area of the rectangular faces is:
3 x 200 = 600 square inches.
Total surface area:
The total surface area of the prism is the sum of the areas of the two triangular bases and the three rectangular faces:
Total surface area = 2 x area of triangular base + 3 x area of rectangular face
= 2 x 120 + 3 x 200
= 240 + 600
= 840 square inches.
Therefore, the surface area of the prism is 840 square inches.
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Use the figure below to find the value of x and PT.
Answer:
x=2
PT=7
Step-by-step explanation:
set up the equation like this: PT=TQ
(4x-1)=(2x+3)
calculate to find x
x=2
put x into the equation for PT
4(2)-1=7
use technology or a z-score table to answer the question. the weights of boxes of rice produced at a factory are normally distributed with a mean of 24 ounces and a standard deviation of 1.3 ounces. consider a shipment of 1200 boxes of rice. how many of the boxes will weigh 25 ounces or less?
The value of expected number of the boxes that will weigh 25 oz or less from the 1200 boxes of rice in shipment is 935.
When we got a normal distribution, then we can convert it to standard normal distribution and its values will give us the z-score.
Since,
X ~ N (μ, σ)
Where, X is following normal distribution with mean and standard deviation.
When transformed into a typical normal distribution, it may be used as follows:
z = X - μ / σ
Z ~ N (0, 1)
so we can write
P (Z ≤ z) = P (Z < z)
Also, know that for Z = z in z tables, the p-value we get is
P (Z ≤ z) = p value
Let;
X is the weights of the rice boxes made at the hypothetical factory, expressed in ounces.
then, as stated in the issue, we have;
X ~ N (μ = 24, σ= 1.3)
The probability is:
P (X ≤ 25)
Converting X to standard normal distribution, we get:
Z = X - μ / σ = X - 24 / 1.3
The probability P (X ≤ 25) can be rewritten as:
P (X ≤ 25) = P (Z ≤ 25 - 24/1.3)
= P (Z ≤ 0.77)
Z = 0.77 has a p-value of 0.7794 according to the z-tables.
Thus, we get:
P (X ≤ 25) = P (Z ≤ 0.77) = 0.7794 = 77.94%
Let;
n = 1200 boxes being bernoulli experiments, each of them prone to success with probability p = 0.7794 or failure (weight > 25 oz) with probability
q = 1-p = 0.2206.
And, Y = the number of successes for 1200 trials.
Then we get:
Y ~ B (n = 1200, p = 0.7794)
The predicted value of Y is the anticipated number of successes, or the anticipated number of boxes that weigh 25 oz or less.
We get:
E (Y) = np = 1200 x 0.7794 = 935
Thus, Out of the 1200 boxes of rice being shipped, 935 are anticipated to weigh 25 ounces or less.
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What is the value of x in this simplified expression 7^-9x 7^-3=7^x
Answer:
x = -12
Step-by-step explanation:
\( {7}^{ - 9} \times {7}^{ - 3} = {7}^{x} \)
the base is equal so we can add the number above
\( {7}^{ - 9 + ( - 3)} = {7}^{x} \)
\( {7}^{ - 12} = {7}^{x} \)
the base is equal so is the number above
-12 = x
Emilia clear a rectangular region in her yard for a garden if the length i a one digit whole number and the width i5. 5 meter what i the leat poible area explain how you found your anwer
If the length of the garden is one digit whole number and the width is 5 meter, then the lease possible area is 5 meters
The shape of the region is rectangular
The length of the garden is one digit whole number
One digit whole numbers are {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}
The width of the rectangular region = 5 meters
We know the area of the rectangle = Length × Width
Here we have to find the least possible area
So the width is given but the length of the garden is unknown but it is a one digit whole number
To get least possible area, the length should be least number, because the area is the product of length and width
The length of the garden = 1
The least possible area = 1 × 5
= 5 meter square
Therefore, the least possible area is 5 meter square
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the accompanying dataset provides data on monthly unemployment rates for a certain region over four years. compare​ 3- and​ 12-month moving average forecasts using the mad criterion. which of the two models yields better​ results? explain.
To compare the 3-month and 12-month moving average forecasts using the mean absolute deviation (MAD) criterion, we need to calculate the MAD for each model and then compare them. The MAD is a measure of the average magnitude of the forecast errors, and a lower MAD indicates a better forecast.
To calculate the MAD for the 3-month moving average model, we need to first calculate the forecasted values for each month by taking the average of the unemployment rates for the previous 3 months. For example, the forecasted value for April 2018 would be the average of the unemployment rates for January, February, and March 2018. We then calculate the absolute deviation between the forecasted value and the actual value for each month, and take the average of those deviations to get the MAD for the 3-month moving average model.
We can repeat this process for the 12-month moving average model, but instead of taking the average of the previous 3 months, we take the average of the previous 12 months.
Once we have calculated the MAD for both models, we can compare them to determine which model yields better results. Generally, a lower MAD indicates a better forecast. However, it is important to note that the MAD criterion only considers the magnitude of the forecast errors and does not take into account the direction of the errors (i.e., overestimation versus underestimation).
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Full Question ;
The accompanying dataset provides data on monthly unemployment rates for a certain region over four years. Compare 3- and 12-month moving average forecasts using the MAD criterion. Which of the two models yields better results? Explain. Click the icon to view the unemployment rate data. Find the MAD for the 3-month moving average forecast. MAD = (Type an integer or decimal rounded to three decimal places as needed.) A1 fx Year D E F G H I 1 2 3 1 с Rate(%) 7.8 8.3 8.5 8.9 9.4 9.6 9.4 9.5 9.7 9.9 9.8 10.1 9.9 9.7 9.8 9.91 9.7 9.4 9.6 9.4 9.3 9.5 9.9 9.5 9.2 9.1 8.9 A B Year Month 2013 Jan 2013 Feb 2013 Mar 2013 Apr 2013 May 2013 Jun 2013 Jul 2013 Aug 2013 Sep 2013 Oct 2013 Nov 2013 Dec 2014 Jan 2014 Feb 2014 Mar 2014 Apr 2014 May 2014 Jun 2014 Jul 2014 Aug 2014 Sep 2014 Oct 2014 Nov 2014 Dec 2015 Jan 2015 Feb 2015 Mar 2015 Apr 2015 May 2015 Jun 2015 Jul 2015 Aug 2015 Sep 2015 Oct 5 7 3 ) 1 2 3 1 5 7 9.1 ) 9. 1 2 3 1 5 7 ) 9.1 8.9 8.9 8.9 8.9 8.7 8.4 8.3 8.3 8.4 8.1 8.1 8.4 8.2 8.3 7.7 7.9 7.9 7.8 1 2 2015 Dec 2016 Jan 2016 Feb 2016 Mar 2016 Apr 2016 May 2016 Jun 2016 Jul 2016 Aug 2016 Sep 2016 Oct 2016 Nov 2016 Dec 3 1 5 3 2 2
Translation of (x-1)²+(y+3)²=36,2 units left and 4 units down
Identify the centers and radii of the two circles. To find the transformation rule, we need to find how many units horizontally and vertically to move the center of one circle to the center of the other circle.
The equation for the shifted circle is
(x+2) ^2+(y+4) ^2=36.
Description: The standard shape of a circle is
(x−h)2+(y−k)2=r2,
where r is the circle's radius and (h,k) is the circle's center.x2+y2=36 centered at (0,0). If the circle is shifted two units to the left, it means that the new center is h = -2. If we move the circle down four units, the new center is k = −4. So, the shifted circle has the equation (x+2)2+(y+4)2=36.
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Which of the following sets of numbers could represent the three sides of a right triangle? a. {13, 48, 50} b. {49, 55, 73} c. {16, 63, 65} d. {20, 72, 75}
Pythagorean theorem states that in a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides. Correct answer is option (c).
To determine which set of numbers could represent the three sides of a right triangle, we can use the Pythagorean theorem:
a. {13, 48, 50}:
Using the Pythagorean theorem: 13² + 48² = 169 + 2304 = 2473 ≠ 50²
Therefore, this set of numbers does not represent the sides of a right triangle.
b. {49, 55, 73}:
Using the Pythagorean theorem: 49² + 55² = 2401 + 3025 = 5426 ≠ 73²
Therefore, this set of numbers does not represent the sides of a right triangle.
c. {16, 63, 65}:
Using the Pythagorean theorem: 16² + 63² = 256 + 3969 = 4225 = 65^²
Therefore, this set of numbers represents the sides of a right triangle.
d. {20, 72, 75}:
Using the Pythagorean theorem: 20² + 72² = 400 + 5184 = 5584 ≠ 75²
Therefore, this set of numbers does not represent the sides of a right triangle.
Based on the Pythagorean theorem, the set of numbers {16, 63, 65} represents the sides of a right triangle.
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Which is the inverses I still don’t get this
Answer:
C.
\({ \tt{f(x) = \frac{12}{x} - 18}} \: and \: { \tt{g(x) = \frac{12}{x + 18} }}\)
Step-by-step explanation:
\({ \tt{f(x) = \frac{12}{x} - 18}}\)
Let inverse be m:
\({ \tt{m = \frac{12}{x} - 18 }} \\ { \tt{x(m + 18) = 12}} \\ { \tt{x = \frac{12}{m + 18} }} \\ \\ { \boxed{ \sf{f {}^{ - 1} (x) = g(x) = \frac{12}{x + 18} }}}\)
Sofia ordered S pizzas for 24 guests at a party. Each guest will have 1/6 of a pizza. FIND S
Answer:
4 pizzas are needed.
Step-by-step explanation:
See image. You could totally think this through and use mental math to figure out how many pizzas are needed. See first image. Picture a pizza, cut it into 6 slices. It feeds 6 people. 2 pizzas feed 12 people. 3 pizzas feed 18 people. 4 pizzas feed 24 people.
If you have to write equations and show math work, you can write a single-variable equation or use a proportion. See image.
-Snow skis were first used in northern Europe and Asia thousands of
from the bones of large animals
years ago. They were probably (18)
and strapped with strips of leather to the boots of skiers. These primitive
skis were used primarily on flat ground as a means of traveling from one
(19) for rapid
place to another. The loose bindings made them too
downhill movement. Not until the development of better skis, more secure
(20) as a
19
fastening methods, and ski lifts did skiing attain
recreational and competitive sport.
18 F diverted
G dissected
H fashioned
J manufactured
A annoying
B laborious
C precarious
D inaccurate
20 F projection
G productivity
H perspective
J prominence
Answer:
no
Step-by-step explanation:
If a/2 = b/3, then b/a = ?
A. 3/2
B. 2/3
1. The second derivative of the function ƒ is given by ƒ" (a) = x² cos (2²+22).. the interval (-4,3) does the graph of ƒ have a point of inflection?A. 2.229 onlyB. 0 and 2.229C. -2.357 and 0.987D -3.259, 0, and 1.603
The graph of ƒ has a point of inflection is (D) -3.259, 0, and 1.603
To determine if a function has a point of inflection, we need to find the values of x where the second derivative changes sign from positive to negative or vice versa. The sign of the second derivative at a point determines the concavity of the function at that point. If the second derivative is positive, the function is concave up, and if it is negative, the function is concave down.
Since ƒ"(a)=x² cos(2a+22), we can see that the second derivative is positive for x²>0. So the function is concave up when x²>0, which means when x is in the interval (-∞,0)∪(0,∞).
Since the interval (-4,3) includes both negative and positive values of x, the graph of ƒ may have a point of inflection within this interval. To determine the exact points of inflection, we need to find the values of x where the second derivative equals zero or is undefined.
Therefore, the answer is (D) -3.259, 0, and 1.603.
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for what values of x is the inequality -5x - 3 + 2x > -18 true
The solution to the inequality is all values of x less than 5. We can write the solution set using interval notation as (-∞, 5).
How to solve this inequality ?To solve the inequality -5x - 3 + 2x > -18, we need to isolate the variable x on one side of the inequality sign.
Starting with the given inequality:
-5x - 3 + 2x > -18
Simplifying the left-hand side by combining the like terms:
-3x - 3 > -18
Adding 3 to both sides:
-3x > -15
Dividing both sides by -3, and reversing the inequality sign since we are dividing by a negative number:
x < 5
Therefore, the solution to the inequality is all values of x less than 5. We can write the solution set using interval notation as (-∞, 5).
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Hi i need help, What is:
(3r-4)- (-5b-3)
(-4k-1)-(-6k-6)
(-6k+7)-(7k+5)
Please help :)
9514 1404 393
Answer:
5b +3r -12k +5-13k +2Step-by-step explanation:
It looks like you want to simplify the sums.
1. (3r -4) -(-5b -3) = 3r -4 +5b +3 = 5b +3r +(-4+3)
= 5b +3r -1
__
2. (-4k -1) -(-6k -6) = -4k -1 +6k +6 = (-4+6)k +(-1+6)
= 2k +5
__
3. (-6k +7) -(7k +5) = -6k +7 -7k -5 = (-6-7)k +(7-5)
= -13k +2
A local college basketball team will play a 30-game schedule this season. Assume that the team has a probability of 0.6 of winning each game. Type the labels "Binomial"in cell C16 and "Distribution"in cell D16. Type "n" in E16, 30 in F16, "p" in G16, and 0.6 in H16.•Starting with the first probability statement in cell C18 and the result in cell D18, continue in columns C and D to find the following probabilities. The variable x represents the number of wins. You may use functions and combinations of functions of the form binom.dist, (binomdistin earlier Excel), and binom.dist.rangedepending on your version of Excel and your personal preference. Please use the help function if you’re not sure how to use a particular function. Since the binomial distribution is discrete, you’ll have to pay special attention as to whether endpoints should be included. Use cell references F16 and H16 whenever possible.
Round your answers to four decimals.
oP(x = 21)
oP(x ≤16)
oP(x > 10)
oP(15 ≤ x ≤23)
oP(15 < x < 23)
Part 3: Normal Distribution•Scores on a national statistics exam are normally distributed with a mean of 74 and a standard deviation of 12. Type the labels "Normal" in cell C24 and "Distribution" in cell D24. Type "mean" in E24, 74 in F24, "standard deviation" in G24, and 12 in H24.•Starting with the first probability statement in cell C26and the result in cell D26 continue in columns C and D to find the following probabilities. Assume that one person is selected at random from the population. You may use functions and combinations of functions of the form norm.dist, (normdistin earlier Excel), norm.inv, and (norminvin earlier Excel) dependingon your version of Excel. Please use the help function if you’re not sure how to use a particular function. Use cell references F24 and H24 whenever possible.
Round your answers to four decimals.
oP(x < 80)
oP(x > 65)
oP(55 < x < 85)
o x2 such that P(x
o x2 such that P(x > xc) = 0.05
Binomial Distribution:
Label "Binomial" is typed in cell C16 and "Distribution" in cell D16.
The values of n, p, and x are taken from cells F16, H16, and the desired cell, respectively.
The following probabilities are calculated:
o P(x = 21) = 0.0402
o P(x ≤ 16) = 0.0138
o P(x > 10) = 0.9983
o P(15 ≤ x ≤ 23) = 0.7063
o P(15 < x < 23) = 0.6359
Normal Distribution:
Label "Normal" is typed in cell C24 and "Distribution" in cell D24.
The values of mean and standard deviation are taken from cells F24 and H24, respectively.
The following probabilities are calculated:
o P(x < 80) = 0.8413
o P(x > 65) = 0.9332
o P(55 < x < 85) = 0.8664
o The values of x1 and x2 are calculated using the norm.inv function, with a probability of 0.05 in cell H29. The value of x1 is found to be 58.9293 and x2 is found to be 89.0707.
In part 2, the binomial distribution is used to find the probabilities of a local college basketball team winning certain number of games in a 30-game season. The probability of winning a single game is given, and the number of games won is treated as a discrete variable. The binom.dist function is used to calculate the probabilities.
In part 3, the normal distribution is used to find probabilities of scores on a national statistics exam. The mean and standard deviation of the exam scores are given, and the scores are treated as a continuous variable. The normal dist function is used to calculate probabilities of a score being below or above a certain value, or within a certain range. The norm.inv function is used to find the corresponding value of the score given a certain probability.
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which terms are used to describe events that have NO outcomes in COMMON?
Events that have no outcomes in common are said to be disjoint or mutually exclusive.
Two sets are known to be mutually exclusive when they have no common elements. Mutually exclusive events are those that cannot take place at the same moment.
If two events are considered disjoint events, then the probability of both events occurring at the same time will be zero.
Set A = {2, 4, 6, 8, 10, 12, 14, 16}
Set B = {1, 3, 5, 7, 9, 11, 13, 15}
A and B do not have any numbers in common, so P (A ∩ B) = 0. Therefore, A and B are mutually exclusive.
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https://hegartymaths.com/assessment
Several points are given on the graph below.
a) A, B and C are three corners of a rectangle.
Write the coordinates of the other corner.
b) C, D and E are three vertices of a rhombus.
Write the coordinates of the other vertex.
5 ty
А.
В.
4
.
3
2
1.
-5
-4
-3
-1
2
3
4
-2
E
5
-1
D.
-2
-3
-4
-5
Answer:
??????????
Step-by-step explanation:
Answer:
need more clarification
Step-by-step explanation:
?????????????????????????????????????????????????????????????????????
Victoria drove 76 miles, burning 4 gallons of gasoline. She knows the total number of miles she can drive is proportional to the number of gallons of gas she burns and wants to create an equation that can be used to predict the number of miles she can drive for any number of gallons of gas used. Drag the correct values to create an equation which will accurately represent the total number of miles, m, Victoria should expect to be able to drive if she uses g gallons of gasoline
The equation that represents the total number of miles, m, Victoria should expect to be able to drive if she uses g gallons of gasoline is m = (19g).
We can determine the proportionality constant by dividing the total number of miles driven (76) by the number of gallons of gasoline burned (4), which gives us 19 miles per gallon (76/4 = 19).
We can then use this proportionality constant to create the equation m = (19g), where m represents the total number of miles Victoria should expect to be able to drive if she uses g gallons of gasoline. This equation tells us that for every additional gallon of gasoline burned, Victoria should expect to be able to drive an additional 19 miles.
For example, if Victoria were to burn 6 gallons of gasoline, she should expect to be able to drive 114 miles (6 x 19 = 114). This equation assumes that Victoria's car has a constant fuel efficiency of 19 miles per gallon.
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24. Paul's car holds a maximum of 19 gallons of gas. About how many
liters of gas does Paul need to fill his gas tank?
no
Answer:
71.915
Step-by-step explanation:
3.785= how many liters that are in a gallon X 19= gallons of gas needed to fill the tank
The number of liters in 1 gallon is 3.78541 therefore,71.92 liters Paul needs to fill in his tank.
What is unit conversion?To convert any unit into another is called a unit conversion.
In order to convert units, we need to care about their dimensions their dimension should not be changed.
Given that,
The amount of fuel Paul's car holds = 19 gallons.
We know that,
1 gallon = 3.78541 liter
Multiply both sides by 19
19 gallon = 71.92 liter.
Hence "The number of liters in 1 gallon is 3.78541 therefore,71.92 liters Paul needs to fill in his tank".
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What is 6(x-6)=x(16-7) as well as the steps?
Answer:
x = -12
Step-by-step explanation:
6x - 36 = 9x
-36 = 3x
3x = -36
x = -12
Answer:
x = -12
Step-by-step explanation:
6(x-6) = x(16-7) given
6x - 36 = 16x -7x distributive multiplication
6x - 36 = 9x simplify
-3x - 36 = 0 subtract 9x to both sides of equality
-3x = 36 add 36 to both sides of equality
x = -12 divide by -3 to both sides of equality
in a standard deck of 52 playing cards, there are 4 queen cards. use this information to answer the following. (1 point each) a. what is the probability of drawing two queens in a row (a queen and a queen) without replacement? b. what is the probability of drawing two queens in a row (a queen and a queen) with replacement? c. are your chances of drawing two queens in a row better with or without replacement?
a.) Probability of drawing two queens in a row (a queen and a queen) without replacement = 0.00452
b.) Probability of drawing two queens in a row (a queen and a queen) with replacement = 0.00592
c.) Chances of drawing two queens in a row better with replacement
Define Probability
Simply put, probability is the likelihood that something will occur.
When we don't know how an event will turn out, we can discuss the likelihood or likelihood of several outcomes.Statistics is the study of events that follow a probability distribution.
Given,
Total possible outcome = 52
There are 4 queens in a deck of 52 cards
a.)
Find, Probability of drawing two queens in a row (a queen and a queen) without replacement.
let, P stands for probability.
P (of drawing 1st queen) = 4 / 52
P(of drawing 2nd queen) = 3 / 51
P(drawing 2 queens in a row without replacement) = 4 / 52 * 3 / 51
= 0.000452
Hence, Probability of drawing two queens in a row (a queen and a queen) without replacement = 0.00452
b.)
Find, Probability of drawing two queens in a row (a queen and a queen) with replacement
P (of drawing 1st queen) = 4 / 52
P(of drawing 2nd queen) = 4 / 52
P(drawing 2 queens in a row with replacement) = 4 / 52 * 4 / 52
= 0.00592
Probability of drawing two queens in a row (a queen and a queen) with replacement = 0.00592
c.) Hence, the probability of with replacement is more so that's why
chances of drawing two queens in a row better with replacement
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Which term matches the definition? one that can be answered with
data and for which it is anticipated that the data collected to answer the
question will vary.
A. symetrical graphs
B. skewed right
C. skewed left
D. statistical question
help me please please please!!!
What formula should be used to calculate an unknown side of a right angled triangle
when the hypotenuse (c) and one other side (b) are known?
a) Oa^2 = b^2-c^2
b) Oa^2 = c^2 + b^2
c) Oa^2 = c^2-b^2
d) Oc^2 = a^2 - b^2
e) Oc^2 = b^2- a^2
Answer:
c) Oa^2 = c^2-b^2
Step-by-step explanation:
the formula of finding hypotenuse (c) is
c^2 = a^2 + b^2
that means c^2 - b^2 = a^2
a^2 = c^2 - b^2.
please help its do now
...
..
.
Answer:
21.
Step-by-step explanation:
The diagram shows a figure made of two right rectangular prisms.
3 yd
9 yd
4 yd
8 yd
6 yd
22 yd
What is the total volume of the figure?
O A. 52 cubic yards
B. 108 cubic yards
O c. 1,056 cubic yards
O D. 1,164 cubic yards
O E. 1,584 cubic yards
Answer: O A.52 cubic yards
Step-by-step explanation: if u add 3+9+4+8+6+22= 52 cubic yards in the total volume of the figure :>
Use the net of the square pyramid to calculate its surface area. 2. Find the Surface Area of the Square Pyramid, 10 yd 16:10 Solution: Find the Surface Area of this ruha ini
To calculate the surface aarea, we will use the formula;
T.S.A = 1/2 (pl) + B
where;
p= perimeter of the base
l= slant height
B= area of the base
From the diagram
l= 10 yard
P= 4(16) = 64 yard
B= 16 x 16= 256 yards
Substitute the value into the formula;
T.S.A = 1/2 (64)(10) + 256
=320 + 256
=576 inches²
Watermelon A is 2 kg lighter than watermelon B and 5 times lighter than watermelon C. Watermelons A and C together are 3 times heavier than watermelon B. Find the weight of each watermelon.
Answer:
Watermelon A weighs 2 kg, watermelon B weighs 4 kg and watermelon C weighs 10 kg.
Step-by-step explanation:
Watermelon A is 2 kg lighter than watermelon B and 5 times lighter than watermelon C. This means that:
A = B - 2
and
A = C / 5 => C = 5A
Watermelons A and C together are 3 times heavier than watermelon B. This means that:
A + C = 3*B = 3B
Put C = 5A:
A + 5A = 3B
6A = 3B
=> B = 6/3 A = 2A
=> A = 2A - 2
=> 2A - A = 2
=> A = 2 kg
B = 2 * 2 = 4 kg
C = 5 * 2 = 10 kg
Therefore, watermelon A weighs 2 kg, watermelon B weighs 4 kg and watermelon C weighs 10 kg.
??? Please
Which point represents -2 3/8 on the number line?
Answer:B
count 2 and ~1/4 back and you get b
Another of Bhaskara's problems results in a quadratic equation Parthava was enraged and seized a certain number of arrows to slay Karna. He expended one-half of them in defending himself. Four times the square root of the number of arrows were discharged against the horses. With six more, he transfixed Shalya, the charioteer. With three more, he rent the parasol, the standard, and the bow; and with the last one he pierced the head of Karna. How many arrows did Parthava have?
Answer:
Parthava had 100 arrows.
Step-by-step explanation:
Let's define N as the number of arrows that Parthava originally has.
He uses one-half of them in defending himself, so he used N/2 arrows
Now he uses four times the square root of the number of arrows, so now he uses:
4*√N
Then he uses 6
Then he uses 3
Then he uses the last one.
If we add all these numbers of arrows that he used, we should get the initial number of arrows that he used, then:
N/2 + 4*√N + 6 + 3 + 1 = N
Now we have an equation that we can try to solve.
First, let's move all the terms to the same side:
N/2 + 4*√N + 6 + 3 + 1 - N = 0
now we can simpify it:
(N/2 - N) + 4*√N + (6 + 3 + 1) = 0
-(1/2)*N + 4*√N + 10 = 0
Now we can define a new variable x = √N
Then we have: x^2 = N
now we can replace these new variables in our equation to get:
-(1/2)*x^2 + 4*x + 10 = 0
Now we just have a quadratic equation.
Remember that for a quadratic equation of the form:
0 = a*x^2 + b*x + c
The solutions were given by:
\(x = \frac{-b \pm \sqrt{b^2 - 4*a*c} }{2a}\)
Then in our case, the solutions will be:
\(x = \frac{-4 \pm \sqrt{4^2 - 4*(-1/2)*10} }{2*(-1/2)} = \frac{-4 \pm 6 }{-1} = 4 \pm 6\)
So there are two solutions:
x = 4 + 6 = 10
x = 4 - 6 = -2
And remember that x = √N
Then x should be positive, then we take x = 10 as our solution here.
then we can use the equation:
x = 10 = √N
then
10^2 = √N^2 = N
10^2 = 100 = N
Parthava had 100 arrows.