Help plz! I don't understand this problem?

a) f(-20)
b) f(0)
c) f(15)

Which exponential function has an initial value of 2? f(x) = 2(3x) f(x) = 3(2x)

John kept track of how many baskets were made in a basketball game. after 4 minutes, 5 baskets were made. how many baskets were made between 9 and 10 minutes? a. 0 b. 1 c. 2 d. 3

Adoughnut shop charges $0.50 for each doughnut and $1 for a carryout box. shirley has $10 to spend. which inequality can be used to find d, the number of doughnuts she could have bought if she also wants them in one carryout box?