Question

Mandip buys a phone card with a value of $60. For each minute he uses the card, $0.15 is deducted from the balance. If he uses the card for 10 minutes, the balance will be $58.50. Which equation shows the remaining balance, b(t), on the card in dollars as a function of t, the time in minutes the card has been used?

b(t) = 0.15t + 60
b(t) = 0.15t
b(t) = –0.15t + 60
b(t) = –0.15t

Answer 1

@bibby @magbak

Answer 2

we want to pick from c or d because the problem states that we lose $0.15 for every "t" (minute)

Answer 3

D ?

Answer 4

yeah*