The Answer is that the present value of $100 is $100. Because this $100 dollar is deposited today so the time is equal to zero and when time is zero the value of amount is the value of amount itself.
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In this problem, we know that Harry saved $100 each week for 8 weeks. In other words, he saved a total amount of money:

We know that he earned $48 on his savings of $800, so for every $100 the interest (I) he earns is:

So, in conclusion Harry did earn $6 in interest for every $100
6 x 10 =60
40 x 24=960
maybe
I REALLY DON'T KNOW
Answer: The sales tax rate is 3%.
Step-by-step explanation: $12.90 is 3% of $430.