Question
You can earn .54 percent per month at your bank. If you deposit
, how long must you wait until your account has grown
?
Note: Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16 .
Number of months
Note: Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16 .
Number of months
Ask by Evans Hampton. in the United States
Jan 26,2025
Upstudy AI Solution
Tutor-Verified Answer
Answer
It will take approximately 110.25 months for your account to grow to $6,700.
Solution
To find out how long you need to wait until your account has grown to $6,700, we can use the formula for compound interest:
where:
-
is the final amount ($6,700), -
is the principal amount ($3,700), -
is the monthly interest rate (0.54% or 0.0054), -
is the number of months.
We need to solve for
when
and
.
Substitute the values into the formula:
Now, we can solve for
using logarithms:
Let’s calculate the value of
using logarithms.
Calculate the value by following steps:
Calculate the value by following steps:
- step0: Calculate:
- step1: Add the numbers:
- step2: Convert the expressions:
- step3: Subtract the terms:
- step4: Use the logarithm base change rule:
- step5: Rewrite the expression:
The number of months it will take for your account to grow to $6,700 is approximately 110.25 months.
Answered by UpStudy AI and reviewed by a Professional Tutor
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Mind Expander
To solve this, you’ll want to use the formula for compound interest, which is given by:
where:
-
is the amount of money accumulated after n months, including interest. -
is the principal amount (the initial deposit). -
is the monthly interest rate (as a decimal). -
is the number of months the money is invested or borrowed.
In your case:
-
-
-
(which is 0.54% expressed as a decimal)
Plugging in the values we have:
Solving for
:
-
Divide both sides by 3700:
-
Now take the logarithm on both sides:
-
Solve for
:
Calculating this gives:
So, you’ll have to wait approximately 110.18 months for your account to grow from $3,700 to $6,700. If you round this to two decimal places, you’re looking at 110.18 months.