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It takes Heidi's cats about seven days to finish a 3.5-pound bag of cat food. Which is the best estimate of the number of pounds of cat food Heidi's cats eat in one year?

A90
B180
C360
D730

Verified Answer :

A year has a little more than 52 weeks, so we need to multiply the amount they eat in a week by 52, let's make it 50 to make it easier:

3.550=355=150+25=175, which is about 180, so the correct answer is b. 180.

doing this problem mentally
7 days= 1week
1 year= 52 week
estimate
50 x 4= 200
closest would be 180 pounds

hope this method helps you

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