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? Show your work.

Answer 1

To find the number of accidents in 2013, we first need to determine the increase in accidents over the four year period.

20% increase over four years means that the number of accidents has increased by 20% each year. To calculate this increase, we can use the formula:

Accidents in 2013 = Accidents in 2009 * (1 + increase rate)^number of years

Accidents in 2013 = 5120 * (1 + 0.20)^4
Accidents in 2013 = 5120 * (1.20)^4
Accidents in 2013 = 5120 * 2.0736
Accidents in 2013 = 10,610.432

Therefore, there were approximately 10,610 highway accidents in Miami in 2013.