(1)

a. f(-4) = 3(-4) + 20 = -12 + 20 = 8

b. f(10) = 3(10) + 20 = 30 + 20 = 50

(2)

a. h(2) = 50(2) − 4.9(2)² = 100 − 19.6 = 80.4

b. h(5) = 50(5) − 4.9(5)² = 250 − 122.5 = 127.5

(3)

a. V(4) = 3(4) − 1.02⁴ = 12 − 1.08 = 10.92

b. V(c + 10) = 3(c + 10) − 1.02^{c + 10} = 3c + 30 − 1.02^{c + 10}