Two fishing boats leave a marina at the same time. one boat travels north at a speed of 12 miles per hour. the other boat heads east at a speed of 9 miles per hour. approximately how far apart are the two boats 15 minutes after they leave the marina

5.25 miles

Step-by-step explanation:

15 min=1/4 of hour

12/4=3

9/4=2.25

3+2.25=5.25

the mistake in the pattern is that :

b. the decimal point was moved one too many place values each time

the correct pattern could be made by :

b. moving the decimal point to the right the same numbers of place values as the exponents