Solve the Problem $t$ Seconds Is $h = - 16 t ^ { 2 } + 640 t$

question 297

Multiple Choice

Solve the problem.
-A projectile is thrown upward so that its distance above the ground after $t$ seconds is $h = - 16 t ^ { 2 } + 640 t$ After how many seconds does it reach its maximum height?

• A) \(10 \mathrm {~s}\)
• B) \(30 \mathrm {~s}\)
• C) \(40 \mathrm {~s}\)
• D) \(20 \mathrm {~s}\)

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Definitions:

Butylethylamine

A compound consisting of butyl and ethyl groups attached to an amine functional group.

Butylpropylamine

Butylpropylamine is an organic compound characterized by its structure comprising both butyl and propyl amine groups, and it's used in various chemical syntheses and applications.

Ethylpropylamine

A chemical compound which is an amine derivative from ethyl and propyl groups.

Compound

A compound created by the chemical combination of two or more elements bonded together.