exam Maths Puzzle Numerical Ability

A ball is thrown vertically upward from the ground with an initial speed of 80 ft/sec. Its height is given by h=80t-16t^2. How high does the ball go? When does the ball hit the ground?

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exam Other Question
Solve each of the following systems by graphing.

x - 2y = 8
3x - 2y = 12
This also has a graph t o do also. Find each percent. Round to the nearest tenth.

1.)294.3% of 81 =
2.) 0.006% of 13,712 =