A bird is flying upwards such that its height in feet after t seconds is given by h=4t. at an instant the bird passes the height of the ball being held out the window, the ball is thrown upward with an initial velocity of 80 feet per second. the height in feet of the ball after t seconds is given by h=-16t^2+80t. find the time it takes for the ball and the bird to reach the same height

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the function makes a strait line horizontally with no x intercept but a y intercept at 9.

answer: 7 x 2/5 = 2.8 hours, is your answer. your welcome! : 3

step-by-step explanation: first work out how long it took to hose 1/7 of the lawn which is 2/5 hours. times that by 7 to get the whole lawn.

sorry i don't know the other answer. i didn't learn what a proportional relationship is.