A Rock Is Propelled Upward from the Top of a Building

question 192

Multiple Choice

A rock is propelled upward from the top of a building 270 feet tall at an initial velocity of 168 feet per second. The function that describes the height of the rocket in terms of time t is $( t ) = - 16 t ^ { 2 } + 168 t + 270$ Determine the
Time at which the rock reaches its maximum height.

• A) 8.4 sec
• B) 10.5 sec
• C) 4.2 sec
• D) 5.25 sec

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Definitions:

Umbilical Cord

The flexible cord-like structure connecting a fetus to the placenta, delivering nutrients and removing waste.

Placenta

A structure that forms in the uterus while pregnant, which supplies the fetus with oxygen and nourishment while eliminating its waste.

Developing Organism

refers to an organism in the stages of growth and development, from conception through to maturity.

Amnion

A thin, tough, transparent membrane that holds the amniotic fluid and surrounds the embryo.