it took marjorie 15 minutes to drive from her house to her daughter's school. If the school was 4 miles away from her house, what was her unit rate of speed?

16 Miles / Hour

Step-by-step explanation:

Distance / Time = Speed

If 4 miles are travelled in 15 minutes then,

16 miles are travelled in 1 Hour

This put together is 16 Miles / Hour

or Turn 15 minutes into a decimal Which is 0.25

divide 4 by 0.25 to get 16

16 Miles/Hour