For that answer i got 3 -2/120 but I'm not sure about it
I'm working on the same thing right now and I'm using every resource in my hands right now to find a solution. I will edit this post when I have more. If you need any more help I have completed the previous activity and most of this one.
EDIT:
Ok so I checked with somebody who is pretty good with math and they said that 5x=5x would be right. Not too sure but that's what I'm putting.
I put EVERYTHING for this assignment in comments down below. Geez all of this for 5 freakin points.

Step-by-step explanation:
d=20
r=10
π=3



49.75
50%=.50
99.50 x .50 = 49.75