Concept explainers
a.
To find:
The time required for a $1000 investment todouble at interest rate r, compounded continuously.Round your answer to two decimal places.
a.
Answer to Problem 145E
It will take approximately 27.73 years for the investment to double.
Explanation of Solution
Given:
Concept used:
Continuous compound interest formula-
A = Final amount after t years,
P = Principal amount,
r = Annual interest rate in decimal form.
Calculation:
Upon substituting our given values in continuous compound interest formula, we will get:
Therefore,it will take approximately 27.73 years for the investment to double.
b.
To find:
The time required for a $1000 investment to triple at interest rate r, compounded continuously.Round your answer to two decimal places.
b.
Answer to Problem 145E
It will take approximately 43.94 years for the investment to triple.
Explanation of Solution
Given:
Concept used:
Continuous compound interest formula-
A = Final amount after t years,
P = Principal amount,
r = Annual interest rate in decimal form.
Calculation:
Upon substituting our given values in continuous compound interest formula, we will get:
Therefore, it will take approximately 43.94 years for the investment to triple.
Chapter 3 Solutions
Precalculus with Limits: A Graphing Approach
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