Question

Need help please!!!!!!

The altitude of an airplane is decreasing at a rate of 42 feet per second. What is the change in altitude of the airplane over a period of 27 seconds?
A.
-69 feet
B.
1,134 feet
C.
69 feet
D.
-1,134 feet

Answer 1

You know that it decreased 42 feet a second, so all you have to do is multiply by 27 to get 1134 feet. Since it's decreasing, it would be represented as a negative number, making the answer D. Next time, take it slow and draw a unit rate, as shown below!