Thomas is saving pennies in a jar. the first day he saves 3 pennies, the second day 12 pennies, the third day 48 pennies, and so on. how many pennies does thomas have on the eighth day?

An ulcer medication has 300 milligrams in 2 tablets. how many milligrams are in 3 tablets?

The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?

If f(x)=x+7 and g(x)=1/x what is (fog)(x)