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Mariulka [41]
3 years ago
7

12.) Last week on

Mathematics
1 answer:
Yuri [45]3 years ago
3 0

Answer:

75 feet long

Step-by-step explanation:

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Calculate the value of x(trigonometry)<br> X=29.7<br> X=6.3<br> X=0.2<br> X=14.5
tekilochka [14]

Answer:

5.5369

Step-by-step explanation:

tan(64) = 13/x

2.3478 = 13/x

Multiply both sides by x

2.3478x = 13

Divide both sides by 2.3478

5.5369 = x

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2 years ago
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What is the volume of a pyramid that has a base with an area of 81 square feet and a height of 4 feet?
Zina [86]

Answer:

108ft³

Step-by-step explanation:

V=(base area) (h/3)   =    81 (4 /3) =108ft³

4 0
2 years ago
What is the answer for each sentence
Harman [31]

Answer:

1. surface area, 2. volume. 3. surface area, 4. volume

Step-by-step explanation:

The stain means it's just the surface of the box, and not what can go in it.

the question is asking how many shoe boxes can fit IN

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2 years ago
Assume that you have paired values consisting of heights​ (in inches) and weights​ (in lb) from 40 randomly selected men. The li
HACTEHA [7]

Answer:

R^2 = r^2 = 0.445^2= 0.198

B. The coefficient of determination is 0.1980, 19.8​% of the variation is explained by the linear​ correlation, and 80.2​% is explained by other factors.

Step-by-step explanation:

Previous concepts

The correlation coefficient is a "statistical measure that calculates the strength of the relationship between the relative movements of two variables". It's denoted by r and its always between -1 and 1.  

Solution to the problem

In order to calculate the correlation coefficient we can use this formula:  

r=\frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2 -(\sum x)^2][n\sum y^2 -(\sum y)^2]}}  

On this case we got that r =0.445

The determinaton coefficient is just:

R^2 = r^2 = 0.445^2= 0.198

And we can put it on % and we got 19.8%. And represent the variation explained by a linear model. The best option on this case would be:

B. The coefficient of determination is 0.1980, 19.8​% of the variation is explained by the linear​ correlation, and 80.2​% is explained by other factors.

Since the explained variation is 19.8% and the remain 100-19.8= 80.2% is explained by other factors.

6 0
2 years ago
Find the slope between the following points: (-5,2) and (3,9)
Kay [80]

Answer:

M=7/8

Step-by-step explanation:

The equation used to solve this is yz-y1/x2-x1.

This applied to the problem would look like 9-2/3--5

Simplified this would be, 7/8 as your slope

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3 years ago
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