In Miami, the number of highway accidents increased by 20% over a four year period. How many accidents were there in 2013 if there were 5,120 in 2009?

explain your answer

To find the number of accidents in 2013, we need to first calculate the 20% increase from 2009 to 2013.

20% of 5,120 accidents in 2009 is:
0.20 x 5,120 = 1,024

Now, we can add this increase to the number of accidents in 2009:
5,120 + 1,024 = 6,144

Therefore, there were 6,144 highway accidents in Miami in 2013.