How do i do this question
9q - 15 = -78

Asales representative from a local radio station is trying to convince the owner of a small fitness club to advertise on her station. the representative says that if the owner begins advertising on the station today, the club's total number of members will grow exponentially each month. she uses the given expression to model the number of club members, in hundreds, after advertising for t months.

Percent increase and decrease. original number: 45 new number: 18

When steve woke up. his temperature was 102 degrees f. two hours later it was 3 degrees lower. what was his temperature then?