Which graph represents exponential decay?

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

Raymond just got done jumping at super bounce trampoline center. the total cost of his session was $43.25 . he had to pay a $7 entrance fee and $1.25 for every minute he was on the trampoline. write an equation to determine the number of minutes (t) that raymond was on the trampoline.

Can someone answer this question for me