7
QuizMultiple Choice

Modeling with Sequences and Series — Quiz

Question 7 • Precalculus

Tyrone opens a savings account by depositing 75 dollars in August. He increases each month’s deposit by 10 dollars compared to the previous month’s deposit. Which of the following shows the amounts in Tyrone’s account from August through December?

Answer
A
75 dollars comma 85 dollars comma 95 dollars comma 105 dollars comma 115 dollars
B
85 dollars comma 95 dollars comma 105 dollars comma 115 dollars
C
160 dollars comma 255 dollars comma 360 dollars comma 475 dollars
D
75 dollars comma 160 dollars comma 255 dollars comma 360 dollars comma 475 dollars

Explanation

Tyrone deposits $75 in August, then adds $10 to each monthly deposit: $85 in September, $95 in October, $105 in November, and $115 in December. So the amounts deposited from August through December are $75, $85, $95, $105, and $115, as shown in choice A. The larger totals in choices C and D come from adding the deposits together.

AI-written and checked against the verified answer.

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