Alex bought six books priced at $8 each. He got a discount of 20% off the total cost. How much did Alex pay for the books? Write
2 answers:
Answer: Alex paid $38.4 for the books.
Step-by-step explanation: Given that Alex bought six books priced at $8 each and he got a discount of 20% off the total cost.
We are to find the amount paid by Alex for the books.
We have
Price of 1 book = $8.
So, price of 6 books = $ (8 × 6) = $ 48.
After a discount of 20%, the cost of 6 books will be
Thus, Alex paid $38.4 for the books.
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The amount that is the closest to the account balance at the end of 4 years is given by: Option B: $5,860. 53 (approx)
<h3>How to calculate compound interest's amount?</h3>If the initial amount (also called as principal amount) is P, and the interest rate is R% per unit time, and it is left for T unit of time for that compound interest, then the interest amount earned is given by:
The final amount becomes:
For the considered case, we're given that:
- Initial amount Laura deposited = $5,500 = P
- Type of interest: Compound interest
- Unit of time: Annually
- Rate of interest = 1.6% annually = R
- Total unit of time for which amount is to be calculated: 4 years = T
The final amount at the end of 4 years in the considered account of Laura is evaluated as:
Thus, he amount that is the closest to the account balance at the end of 4 years is given by: Option B: $5,860. 53 (approx)
Learn more about compound interest here: