Question: Example 2: Mr. Curley is fired from a catapult positioned at the top of a building. His height (in metres) over time (in seconds) is

 Example 2: Mr. Curley is fired from a catapult positioned at

Example 2: Mr. Curley is fired from a catapult positioned at the top of a building. His height (in metres) over time (in seconds) is represented by h(t) = -5t2 + 35t +90. (a) When does Mr. Curley hit the ground

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