Answer:
9:5
ratios are just putting the numbers next to each other with ':' in the middle
Step-by-step explanation:
radius = diameter/2
so 28/2=14
using 3.14 for PI
2*3.14*14 = 87.92 = 88 inches
You know that BC is congruent to x so you need to solve for x using the ratio:

So then we need to find BC.
We know:


Therefore BC =8
Then:

-7+(9)=2
you can do the opposite of what is given (9-7)