What's the perimeter of a semicircle with a diameter of 12 miles?

The perimeter, or circumference, of a circle is pi x diameter. A semicircle would just be 1/2pi x diameter. In this case, that would equal 6 pi. If you are supposed to use 3.14 as pi, then it would equal 18.84.

24 is the correct answer.

Ithink you're supposed to multiply 12.50 which is how much he makes per hour and then multiply it by each number then add whats left togrther and there's your answer