Choose the One Alternative That Best Completes the Statement or Answers

question 91

Multiple Choice

Choose the one alternative that best completes the statement or answers the question.
-A can in the shape of a right circular cylinder is required to have a volume of 700 cubic centimeters. The top and bottom are made up of a material that costs $8 \%$ per square centimeter, while the sides are made of material that costs 5 e per square centimeter. Which function below describes the total cost of the material as a function of the radius $\mathrm { r }$ of the cylinder?

• A) \(\mathrm { C } ( \mathrm { r } ) = 0.16 \pi \mathrm { r } ^ { 2 } + \frac { 140 } { \mathrm { r } }\)
• B) \(C ( r ) = 0.08 \pi r ^ { 2 } + \frac { 70 } { r }\)
• C) \( \mathrm { C } ( \mathrm { r } ) = 0.16 \pi \mathrm { r } ^ { 2 } + \frac { 70 } { \mathrm { r } }\)
• D) \(C ( r ) = 0.08 \pi r ^ { 2 } + \frac { 140 } { r }\)

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Definitions:

Neurotransmitters

Chemical messengers in the brain that transmit signals from one neuron to another, influencing mental processes and behavior.

Knob-like Terminals

The expanded areas at the end of axons that are responsible for releasing neurotransmitters into the synapse.

Action Potential

A rapid change in electrical charge across a neuron's cell membrane, allowing for the transmission of nerve impulses.

Excitatory Signals

These are biochemical impulses that promote or increase neural activity or the firing of neurons.