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April 20, 2014

Homework Help: Math

Posted by Nicole on Tuesday, October 18, 2011 at 2:43pm.

A person standing close to the edge on the top of a 160-foot building throws a baseball vertically upward. The quadratic function

s(t) = -16t^2 +64t + 160

models the ball's height above the ground, s(t), in feet, t seconds after it was thrown.

After how many seconds does the ball reach its maximum height? What is the maximum height?



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A person standing close to the edge on the top of a 160-foot building throws a baseball vertically upward. The quadratic function

s(t) = -16t^2 +64t + 160

models the ball's height above the ground, s(t), in feet, t seconds after it was thrown.


How many seconds does it take until the ball finally hits the ground? Round to the nearest tenth of a second.

_______________________________________

The equation shown below models the head circumference of severely autistic children, y, in centimeters, at age x months.

y = 4(sqrt x) + 35

According to the model, what is the head circumference at birth?

_____________________________________


Write an equation in vertex form of the parabola that has the same shape as the graph of f(x) = 2x^2, but with the point (7, 4) as its vertex.

_____________________________________

Find the coordinates of the vertex for the parabola defined by the functionf(x) = -3(x-2)^2 + 12.

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Find the coordinates of the vertex for the parabola defined by the functionf(x) = -3(x-2)^2 + 12.

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