82.) a varies directly as b and inversely as the square of c, and a=10, when b=8 and c=2. Find a when b=20 and c=5.
83.) During a canoe trip, Roberto paddled twice as many hours as Edward, and Jim paddled for one hour. If the three of them paddled less than a total of ten hours, what is the number of hours Roberto could have paddled?
+37159 a ~ b/ c2 k k is proprtionality constant calculate k by subbing in the initial values
10 = 8/2^2 k
k =5
a = 5b/c2
a = 5(20)/52 = .........
