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anonymous
 one year ago
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?
anonymous
 one year ago
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?

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The 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 of 5 feet from 3 seconds to 5 seconds.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@welshfella anything

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0plug in x = 3 and x = 5 into the equation to see the height of the water at these times f)3) = (3)^2 + 5(3) + 4 = 9+15+4 = 10 feet can you work out the height for x = 5?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0just plug in x=5 and work it out as above

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0what exactly do i have to solve

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0do as I have done but replace the 3 by 5 f(5) = (5)^2 etc

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0dw:1437683865329:dw

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0No 5 replaces x in the formula then you work it out

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0(5)^2 + 5(5) + 4 = ?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0you REPLACE the x in x^2 + 5x + 4 by 5

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0so the height of the water goes from 10 to 4 feet in 53 = 2 seconds it decreases 6 feet in 2 seconds so which choice is correct?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0average speed will be 6/2 = 3 feet per second

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0its falling and average speed is 3

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0yea its got to be A
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