The answer is:
The airplane will travel 8800 feet in 10 seconds.
It's a conversion exercise, we need to be careful in order to solve it with no mistakes.
First:
We need to remember that 1 hour is equal to 60 minutes, and 1 minute is equal to 60 seconds, so, to calculate how many seconds are in one hour, we need to perform the following operation:
[tex]Time=1hour*\frac{60minutes}{1hour}*\frac{60seconds}{nminute}=3600seconds[/tex]
Second:
We need to convert from miles to feet, we need to remember that 1 mil is equal to 5280 feet.
So, solving we have:
[tex]Speed=600\frac{miles}{hour}*\frac{1hour}{3600seconds}*\frac{5280ft}{1mile}=880\frac{ft}{seconds}[/tex]
Now, calculating how many feet does it travel in 10 seconds, we have:
[tex]distance=speed*time\\\\distance=880\frac{ft}{seconds}*10seconds=8800ft[/tex]
We have that the airplane will travel 8800 feet in 10 seconds.
Have a nice day!
