# Khan/khan-exercises

Merge branch 'issue9158'

```Conflicts:

close #11025 fix #9158```
beneater committed Apr 12, 2012
2 parents ae6ef9c + c07a876 commit c93633a8556cccd178859adf91a3191e0ab27d77
Showing with 2 additions and 2 deletions.
 @@ -71,13 +71,13 @@

{On Monday|Last week}, person(1) and person(2) decided to see how fast they could sprint meters meters. They asked their friend person(3) to time them with a stopwatch.

{After time_3 minutes, person(3) agreed to time the runners.|} person(1) sprinted first and ran meters meters in time_1 seconds. When it was person(2)'s turn, he(2) sped off and completed the run in time_2 seconds.

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How much faster was person(2) than person(1)?

+

How much faster was person(2) than person(1) in seconds?

time_1-time_2 seconds

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To find how much faster person(2) was than person(1), we need to find the difference between their times. +

To find how much faster person(2) was than person(1), we need to find the difference between their times in seconds.

person(1)'s time - person(2)'s time = difference in times.

graph.subtractor = new DecimalSubtractor( time_1_integer, time_1_decimal, time_2_integer, time_2_decimal );