Concept explainers
Find the amount of money in her account originally.
Answer to Problem 75STP
She had $32,000 in the savings account originally.
Explanation of Solution
Given:
Danette has a savings account. She withdraws half of the contents every year. After 4 years, she has $2000 left. How much did she have in the savings account originally?
Concept Used:
The amounts in the account form a geometric sequence with
Use the formula for the nth term of a geometric sequence:
Calculation:
The amounts in the account form a geometric sequence with
Use the formula for the nth term of a geometric sequence:
Thus, she had $32,000 in the savings account originally.
Chapter 10 Solutions
Glencoe Algebra 2 Student Edition C2014
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