Find the perimeter and the area of the composite figure a. what is the approximate perimeter of the concrete region? use 3.14 for π b. what is the exact area of the concrete region? leave answers in terms of π.

Part A) The approximate perimeter of the concrete region is

Par B) The exact area of the concrete region is

Step-by-step explanation:

Part A) What is the approximate perimeter of the concrete region?

we know that

The perimeter of the composite figure is equal to

The radius of semicircle is

substitute

Part B) What is the exact area of the concrete region?

we know that

The area of the composite figure is equal to the area of semicircle plus the area of rectangle plus the area of triangle

so

The radius of semicircle is

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

step-by-step :