Mr. Dominguez invests $3,000 in a savings plan. The savings account pays an annual interest rate of 4.2% on the amount he put in
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Given:
The equation is:
To find:
The solution for the given equation.
Solution:
We have,
It can be written as:
Taking square root on both sides, we get
[Radius cannot be negative]
Therefore, the value of r is about 6.36 cm.