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alexira [117]
3 years ago
5

Find surface area of shape.

Mathematics
1 answer:
svp [43]3 years ago
3 0

SA = 2 x pi x r (h + r)

SA = 2 x 3.14 x 5 (8 + 5)

SA = 31.4 (13)

SA = 408.2

SA = 408

The answer is B) 408 m².

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If the area of a square is 36 square unit what si the length of a side of the square​
kodGreya [7K]

Answer:

The length of the square is 6 units.

Step-by-step explanation:

Given that all sides of the square are the same and the area of square formula is A = length×breadth. So let's make x as the sides :

area = length \times breadth

let \: area = 36 \\ let \: sides \:  = x

36 = x \times x

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x = ± \sqrt{36}

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6 0
2 years ago
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The sum of two numbers is 39 and the difference is 3. What are the numbers?
frosja888 [35]

Answer: 21 & 18

Step-by-step explanation:

Sum of two numbers is 39

Difference is 3

Let the numbers be x & y

X+y=39........equation 1

X-y=3...........equation 2

X=3+y............equation 3

Substitute equation 3 into equation 1

(3+y)+y=39

3+y+y=39

3+2y=39

2y=39-3

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Y=18

Substitute for y in equation 2

X-y=3

X-18=3

X=3+18

X=21

The two numbers are 21 & 18

8 0
3 years ago
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2 years ago
What is correct about F-test of overall validity of the model?
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Step-by-step explanation:

It is one sided test of R-squared being zero versus being greater than zero.

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