Ok, so
We know that the car is travelling at a speed of 39miles/hour. The car's speed in miles per minute will be:
[tex]39\frac{miles}{hour}\cdot\frac{1hour}{60minutes}=0.65\frac{miles}{\min ute}[/tex]
Now, we're asked to find how many miles the car will travel in 20 minutes. This is:
[tex]0.65\frac{miles}{\min ute}\cdot20\min utes=13miles[/tex]
