C = 2πr
C = 2(3.14)(2.5)
C = 15.7 = 16 cm is your answer.
282.6 m = πD
282.6 m = (3.14)D
282.6 m/3.14 = 3.14/3.14 x D
90 m = D
90 meters is the diameter.
hope this helps you!!!
685/5 = 137
137 doesn't factor at all, so your factors are 5 and 137.
Answer:
−3X−30
Step-by-step explanation:
Answer: 84
<u>Step-by-step explanation:</u>
Set up a proportion as follows: 

Cross multiply: 12x = 7 × 144
Divide by 12: x = 7 × 12
Simplify: x = 84