Question

Mrs.Sloan is purchasing 3.4 pounds of trail mix that costs $4.25 per pound. How much change will Mrs.Sloan receive if she gives the cahier $20.00

Answer 1

1 pound = $4.25

3.4 pound = $4.25 x 3.4
3.4 pound = $14.45

Change = $20.00 - $14.45
Change = $5.55

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Answer: Mrs Sloan will receive $5.55 change.
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Answer 2

3.4 pounds times 4.25 gives you how much it costs. 14.45 is how much it costs which you subtract from 20 to know that he will get $5.55 of change.