A Coin Is Tossed Upward from a Balcony 390 $h ( t ) = - 16 t ^ { 2 } + v _ { 0 } t + h 0$

question 56

Multiple Choice

A coin is tossed upward from a balcony 390 ft high (h₀) with an initial velocity (v₀) of 16 ft/sec , according to the formula $h ( t ) = - 16 t ^ { 2 } + v _ { 0 } t + h 0$ . where t is time in seconds. During what interval of time will the coin be at a height of at least 70 ft ?

• A) \(4 \sec \leq t \leq 5 \mathrm { sec }\)
• B) \(0 \mathrm { sec } \leq \mathrm { t } \leq 5 \mathrm { sec }\)
• C) \(5 \mathrm { sec } \leq \mathrm { t } \leq 10 \mathrm { sec }\)
• D) \(0 \sec \leq t \leq 1 \mathrm { sec }\)

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Definitions:

Antiport

A mechanism of membrane transport where two substances are moved in opposite directions across a cell membrane, usually by a protein transporter.

Uniport

A type of transporter in cell membranes that moves a single type of molecule in one direction across the membrane.

Embarrassment

A feeling of self-consciousness, shame, or awkwardness that occurs when private aspects of the self are exposed or when failing to meet social expectations.

Participating

The act of taking part or being actively involved in an activity or event.