You can prove the proofs by showing your work to prove the proofs.
Answer:
2 7/12
Step-by-step explanation:
Simple fraction problem
Solve the parenthesis firt.
17-9 = 8
3*2 = 6 now multiply 6 by 8 that equals 48
now divide 48 by 2
48÷2= 24
$21 because 3$x$7(numbers of days in a week)is $21. I hope this helps :)
Circumference =

When you plug that in you should have

Solve that and you have your answer(: I would recommend rounding to the nearest hundreth