17
QuizMultiple Choice

Exponential Functions — Test

Question 17 • Mathematics I

Yui makes a list of the balances in her savings account at the end of each month. She notices that each month’s total is 5 percent greater than the previous month’s total. She writes a recursive formula to describe the account balances. Which value should she use as the common ratio?

Answer
A
0 point 5
B
5 point 0
C
1 point 0 5
D
0 point 0 5

Explanation

A 5 percent increase means each balance is the previous balance plus 5 percent of it: 100% + 5% = 105% of the previous balance. As a decimal multiplier, 105% is 1.05, so the common ratio is 1.05, choice C.

AI-written and checked against the verified answer.

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