Chloe baked 4 dozen tarts in 3 hours. at this rate, how many tarts did chloe bake per hour

1 dozen=12
4 dozen =48
To find the number she made per hour, divide 48 by 3. You should get 16.

A dozen= 12X 4 in 3 hours = 48 divided by 3 = 16

For this case we will first look for the total cost of the purse.
 We then have the following rule of three:
 14.95 $ > 100%
 x > 105%
 Clearing x we have:
 x = (105/100) * (14.95)
 x = 15.6975 $
 The amount needed to buy the purse is:
 15.6975 - 10 = 5.6975 $
 
 holley needs 5.6975 $ to buy the purse