Question

The speed limit in the school parking lot is 15 miles per hour. Nannette drove into school at a speed of 19 miles per hour. By how many miles per hour did Nannette exceed the speed limit?

Answer 1

So 19-15.
19 - 15 = 4
The answer is 4 miles per hour.

Answer 2

4 miles per hour.

Explanation:

In order to calculate this you just need to withdraw from the speed at which Nannette was driving in the school parking lot the speed limit:

Excess of speed: Nannettes speed-speed limit

Excess of speed: 19 mph-15mph

Excess of speed:4 mph

So now we know that she was driving 4 miles over the speed limit.