Solve
-A Rocket Is Launched from the Top of a Cliff

question 1

Multiple Choice

Solve.
-A rocket is launched from the top of a cliff that is 48 feet high with an initial velocity of 120 feet per second. The height, $h$ , of the rocket after $t$ seconds is given by the equation $h = - 16 t ^ { 2 } + 120 t + 48$ . How long after the rocket is launched will it strike the ground? Round to the nearest tenth of a second, if necessary.

• A) \(9.1 \mathrm { sec }\)
• B) \(8.5 \mathrm { sec }\)
• C) \(7.9 \mathrm { sec }\)
• D) \(9.5 \mathrm { sec }\)

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Definitions:

Night Terrors

A sleep disorder causing feelings of terror or dread, and typically involves screaming, flailing, and waking up in a frightened state without recalling the dream.

Nightmares

Disturbing dreams that can cause feelings of fear, terror, or anxiety, often waking the sleeper.

Psychological Problems

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Insomnia

A sleep disorder characterized by difficulty falling asleep, staying asleep, or experiencing restorative sleep.