Can someone me answer 7, 8, and 9. you!
i don’t really get the circle concept

Part 7) Option C. The approximate perimeter of the patio is

Part 8) Option G.

Part 9)

Step-by-step explanation:

Part 7) we know that

The perimeter of the figure is equal to the circumference of the larger half circle plus the circumference of the smaller half circle plus two times the length of 8 ft

step 1

Find the circumference of the larger half circle

The circumference of the larger half circle is

we have

substitute

step 2

Find the circumference of the smaller half circle

The circumference of the smaller half circle is

we have

substitute

step 3

Find the perimeter of the figure

assume

so

Part 8) we know tat

The area of a circle is equal to

we have

assume

substitute the values and solve for r

Find the diameter D

Divide the width of the pool by the diameter of the floats

so

Part 9)

step 1

Find the circumference of one coaster

The circumference of circle is

we have

assume

substitute

step 2

Find the circumference of 48 coasters

so

step 3

we know that

The laser cut woods at the rate of 3 inches per minute

By proportion find how many minutes will it take to cut out 48 coasters