Julia Made a Purchase at a Furniture Store, but It

question 73

Multiple Choice

Julia made a purchase at a furniture store, but it was too big and did not fit into her car. So, she arranged to have the store deliver the purchase for her. She paid for her purchase, plus the sales taxes, plus the fee. The taxes are 5 % and the fee is $25. Write a function t ( x ) for the total, after taxes, on the purchase amount x . Write another function f ( x ) for the total, including the delivery fee, on the purchase amount x . How much money did Julia spend, if she made a $440 purchase?

• A) t ( x ) = 0.05 x ; f ( x ) = x + 25 ; $47
• B) t ( x ) = 1.05 x ; f ( x ) = x + 25 ; $487.00
• C) t ( x ) = 1.05 x ; f ( x ) = x + 25 ; $488.25
• D) t ( x ) = 0.05 x ; f ( x ) = x + 25 ; $487.00

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Definitions:

Hypothesized Value

A specific value proposed as existing or being true within the context of a statistical hypothesis test.

Null Hypothesis

A default statement that indicates no effect, difference, or relationship between two or more variables in an experiment.

Alternative Hypothesis

The hypothesis that is tested against the null hypothesis, usually representing the notion of a difference or effect.

Type I Error

Erroneously dismissing a true null hypothesis, often called a "false positive."