Help fast <3 An oil company fills 1 over 10 of a tank in 1 over 5 hour. At this rate, which expression can be used to determine how long will it take for the tank to fill completely?

a 1 over 5 ⋅ 10 hours
b 1 over 10 ⋅ 5 hours
c 1 over 5 ⋅ 1 over 10 hours
d 5 ⋅ 10 hours

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.