Math Problem Statement
Most people do not have the choice to drive or fly to a destination close to home but perhaps we will in the future. Two companies, one in Massachusetts and one in Slovakia, are working on producing a flying car. A prototype has entered the testing phase in Slovakia and the Massachusetts company is working on perfecting retractable wings on their car model. Although mass production has not begun, the prototypes have successfully reached lift off with ranges of just over 400 miles and speeds just over 100 miles per hour. Source: Marquis, E. "Aeromobil 2.5 flying car makes first flight test." AolAutos. 25 Oct 2013. Retrieved from http://translogic.aolautos.com/2013/10/25/aeromobil-2-5-flying-car-makes-first-test-flight/ Question content area bottom Part 1 Suppose the sticker price on a particular car was 17,090. A consumer expects to qualify for a rebate of $4,500 and receive an additional $3,500 for trading in his current car. Six years ago the consumer invested $7,500 in a savings account earning 2% APR compounded monthly. To the nearest dollar how much would the consumer have saved to purchase the car? Total saved would be $ enter your response here. (Round to the nearest dollar as needed.)
Solution
To calculate how much the consumer would have saved in the savings account, we need to use the formula for compound interest:
where:
- is the amount of money saved after interest,
- is the initial principal (the amount the consumer invested),
- is the annual interest rate (2%),
- is the number of times the interest is compounded per year (monthly compounding),
- is the number of years the money was invested.
Let's calculate this.
The consumer would have saved $8,455 after six years in the savings account.
Would you like further details or have any other questions?
Here are five related questions:
- How would the amount change if the interest rate was 3% instead of 2%?
- What if the consumer had invested $10,000 instead of $7,500? How much would they have saved?
- How does compounding frequency (monthly vs. yearly) affect the final amount?
- How long would it take to double the investment with a 2% interest rate compounded monthly?
- How would the savings change if the consumer made additional contributions each month?
Tip: Always check how often the interest compounds, as more frequent compounding will increase your total returns!
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Math Problem Analysis
Mathematical Concepts
Compound Interest
Exponential Growth
Formulas
Compound Interest Formula: A = P(1 + r/n)^(nt)
Theorems
-
Suitable Grade Level
Grades 10-12
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