If he uses 1 quarter, he has 40 cent left to make.He can do that in two ways, by using 2 dimes andall four nickels, or all 3 dimes snd 2 nickels.That's 2 ways.
If he uses both quarters, he has 15 cent left to make.He can do that in two ways by using 1 dime and 1 nickel,or no dimes and 3 nickels.That's 2 more ways. So there are four ways to make 65 cents.
1. Ratio- 91:21
2. Reduce- the common factor is 7
3. Answer- 13:3
Answer:
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Step-by-step explanation:
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When written in scientific notation, 3,900 = 3.9 x 10^3
