ou deposit $1,000 in an account. The account earns 10.5% interest compounded yearly, so after 12 years the value has risen to $3,314.  a) Use 70 over R appromixation to estimate the doubling time for the account. The value doubles about every ____ years. (Round to nearest tenth of a year) b) The higher the interest rate, the less accurate approximation in part a. Use logs, raxicals, or iretation to calxulate the exact doublig time for the account.    The value doubles every ____ years.  Round answer to nearest tenth of a year.

College Algebra
1st Edition
ISBN:9781938168383
Author:Jay Abramson
Publisher:Jay Abramson
Chapter9: Sequences, Probability And Counting Theory
Section9.4: Series And Their Notations
Problem 56SE: To get the best loan rates available, the Riches want to save enough money to place 20% down on a...
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You deposit $1,000 in an account. The account earns 10.5% interest compounded yearly, so after 12 years the value has risen to $3,314. 

a) Use 70 over R appromixation to estimate the doubling time for the account.

The value doubles about every ____ years. (Round to nearest tenth of a year)

b) The higher the interest rate, the less accurate approximation in part a. Use logs, raxicals, or iretation to calxulate the exact doublig time for the account. 

 

The value doubles every ____ years. 

Round answer to nearest tenth of a year. 

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