Answer:
Step-by-step explanation:
689.50/98.50 = 7 trampolines they sold
The 1st and the last options
5:10 can be simplified to 1:2. Other figures that fit this ration are A, or 2:4, and D, or 4:8.
The radius was divided by 2.
31.4 = 2pi * r
31.4/2pi = 15.7/pi
15.7 = 2pi * r
15.7/2pi = 7.85/pi
(7.85/pi) / (15.7/pi) = 1/2