3
QuizMultiple Choice

Equations of Exponential Functions

Question 3 • LVA - Mathematical Modeling - Spring

You just obtained a credit card. You immediately purchase a stereo system for $200. Your credit limit is $1000. Let’s assume that you make no payments and purchase nothing more and there are no other fees. The monthly interest rate is 1.42%.What is the growth rate of your credit card balance?

Answer
A
0.42
B
0.0142
C
14.2
D
142

Explanation

A monthly interest rate of 1.42% written as a decimal is 1.42 ÷ 100 = 0.0142. Therefore, the balance grows by 0.0142 of its current amount each month, which is choice 0.0142.

AI-written and checked against the verified answer.

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