Andy would like to put a row of decorative title around his circular pool. the radius of the pool is 5 ft if the titles cost 12 per foot how much will the title cost? select the correct
250
377
435
350

B

Step-by-step explanation:

Use the circle circumference formula.

C = 2*pi*r

Plug in 5 for r.

C = 2*pi*5 or about 31.42

Multiply 31.42 by 12.

31.42 * 12 = 377.04

So the answer is B

The title cost 377

Step-by-step explanation:

The arc of a circle can be calculated by using the following formula:

s = rθ

Where S is the arc of the circle, r the radius and θ the angle. According to the statement, the radius of the pool is 5ft and the angle θ= 2π given that he wants to put a row of decorative title around the whole pool.

Then s=2π*5ft = 31,415 ft.

Given that the cost of the titles is 12 per foot, the cost will be:

Cost = 12*31,415 = 376,98 which is aprox 377.

The title cost 377

8(-10x+3.5y-7)

8×-10x + 8×3.5y + 8×-7

-80x + 28y - 56

therefore

-80x+28y-56 is the correct answer