Question
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(b) Marcus invests in an account that pays per year simpie in account for 6 years.
He leaves the money in the
At the end of 6 years there is in the account.

Ask by Page Byrd. in Singapore
Mar 22,2025

Upstudy AI Solution

Tutor-Verified Answer

Answer

Marcus initially invested $1,250.

Solution

Step 1: Write the formula for simple interest
The amount after years with a principal and an annual simple interest rate is given by:
Step 2: Substitute the given values into the formula
Here,
  • (since )
Substitute these into the formula:
Step 3: Simplify the equation
Calculate :
Thus,
Step 4: Solve for
To isolate , divide both sides of the equation by :
Step 5: Calculate the value of
Perform the division:
Final Answer:
Marcus’s initial investment was .

Answered by UpStudy AI and reviewed by a Professional Tutor

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The Deep Dive

To find out how much Marcus initially invested, you can use the formula for simple interest: , where is the total amount after time , is the principal amount (initial investment), is the rate, and is the time in years. Rearranging the formula gives you . Plugging in the values, . So Marcus initially invested approximately $1249.77.
Now, let’s take a little trip down memory lane! The concept of simple interest dates back to ancient civilizations, such as the Babylonians and Egyptians. They used their own versions of interest to encourage lending and borrowing. Fast forward a few centuries, and you’ll find that simple interest is still a fundamental concept in finance today, despite the more complex world of compound interest! Wouldn’t it be fun if those ancient lenders had a calculator?

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