A(r)=3.12r2. what is the value of a(5)

i leave the calculator work to you.

7. diameter 4 miles, circumference 4π miles

8. radius 0.2 miles, circumference 0.4π miles

[this is a bad problem because the actual radius of a car on the track is less than 0.2 miles so the answer is less than 0.4π miles]

9. radius 6 feet, circumference 12π feet

10. diameter 14 cm, circumference 14π cm

11. diameter 4.8 feet, circumference 4.8π feet

$450

step-by-step explanation:

first, you have to multiply 150x2=300

next, you have to add 150+300= 450

cant open file sorry!

step-by-step explanation:

answer: i dont know but if you try hard you will get it right : )

step-by-step explanation: