Solve the Problem $t$ Seconds Is $h = - 14 t ^ { 2 } + 560 \mathrm { t }$

question 58

Multiple Choice

Solve the problem.
-A projectile is thrown upward so that its distance above the ground after $t$ seconds is $h = - 14 t ^ { 2 } + 560 \mathrm { t }$ . After how many seconds does it reach its maximum height?

• A) \(28 \mathrm { sec }\)
• B) \(40 \mathrm { sec }\)
• C) \(14 \mathrm { sec }\)
• D) \(20 \mathrm { sec }\)

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Definitions:

Hydrophobic Region

A part of a molecule that is repelled by water and typically soluble in nonpolar solvents.

Hydrogen Bond

A weak bond formed between a hydrogen atom in one molecule and an electronegative atom, such as oxygen or nitrogen, in another molecule, important in the structure of water and biological molecules.

Polar Covalent Bond

A type of chemical bond where a pair of electrons is unequally shared between two atoms.

Water Molecule

A chemical compound consisting of two hydrogen atoms bonded to one oxygen atom, essential for all known forms of life.