O borrow​ money, you pawn your guitar. Based on the value of the​ guitar, the pawnbroker loans you ​$840 .
One month​ later, you get the guitar back by paying the pawnbroker ​$1270
.
What annual interest rate did you​ pay?

Answer: r=4.5  feetexplanation: radius  r  is half of the diameter  d,⇒r=d2=92=4.5  feetidk i could be wrong

What is the last question i don’t see it?

1. isolate the variable, in this case, d. subtract 35.5 on both sides of the equation.2. 52 subtracted by 35.5 is 16.53. therefore your answer would be d= 16.5this is the basics of pre algebra, isolating variable through adding, subtracting, multiplying, and dividing, if you have any other questions to ask just comment!