Sunday

September 21, 2014

September 21, 2014

Posted by **Melissa** on Monday, October 17, 2011 at 10:28pm.

a) Determine the max height of the ball

b) how long does it take for the ball to reach its max height

c) How high is the rooftop

- Math( help please ! ) -
**Steve**, Tuesday, October 18, 2011 at 4:39amy = 5(10 + 4t - t^2)

max height achieved where t = -b/2a = 2

y(2) = -5(4) + 20(2) + 50 = 70

as above, when t=2

The rooftop is the ball's initial height. That is, when t=0. So, 50 ft.

- Math( help please ! ) -
**Melissa**, Tuesday, October 18, 2011 at 8:37amthank you so much

**Answer this Question**

**Related Questions**

Math( help please ! ) - The height of a ball thrown vertically upward from a ...

math - An object that is falling or vertically projected into the air has it ...

Algebra - If a ball is thrown vertically upward from a height of 56ft. above ...

Physics - A red ball is thrown down with an initial speed of 1.3 m/s from a ...

physics - A red ball is thrown down with an initial speed of 1.2 m/s from a ...

Pre-Calc - ball thrown vertically upward with an initial velocity of 80 ft per ...

college - A blue ball is thrown upward with an initial speed of 19.8 m/s, from ...

math - A person standing on the roof of a building throws a ball directly upward...

Math - A ball is tossed straight upward with an initial velocity of 80 ft per ...

phy - A blue ball is thrown upward with an initial speed of 20.6 m/s, from a ...