Question

Will Give Medal!!

Water coming out from a fountain is modeled by the function f(x) = −x2 + 5x + 4 where f(x) represents the height, in feet, of the water from the fountain at different times x, in seconds.

What does the average rate of change of f(x) from x = 3 to x = 5 represent?

The water falls down with an average speed of 3 feet per second from 3 seconds to 5 seconds.
The water falls down with an average speed of 5 feet per second from 3 seconds to 5 seconds.
The water travels an average distance of 3 feet from 3 seconds to 5 seconds.
The water travels an average distance o

Answer 1

f(3) = 10, so at a flight time of 3 sec, height = 10 feet.
f(5) = 4, so at a flight time of 5 sec, height = 4 feet.
This shows that in the 2 seconds of time that elapsed, water dropped down 6 feet, or 3 feet in 1 sec.

Answer 2

so which one do you choose?

Answer 3

ok... so the first one...?

Answer 4

So I choose (A) YES!

Answer 5

Thank (:

Answer 6

i dont know why the caps were on lol

Answer 7

yw