Use the Given Information to Write an Equation

question 31

Multiple Choice

Use the given information to write an equation. Let x represent the number described in the exercise. Then solve the
equation and find the number.
-The monthly cost of a certain long distance service is given by the formula C = 0.08t + 6.95 where C is in dollars and t is the amount of time in minutes called in a month. Find the cost of calling long distance for 160 minutes in
A month.

• A) $18.75
• B) $22.95
• C) $19.75
• D) $12.80

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Definitions:

Sampling Distribution

The probability distribution of a given random-sample-based statistic, used to make inferences about a population.

Mean

The arithmetic average of a set of numbers, calculated by adding all the values together and dividing by the number of values.

Number of Successes

This term refers to the count of times an outcome of interest occurs in a statistical experiment.

Standard Deviation

A measure of the amount of variation or dispersion of a set of values.