Amy runs 1 mile in 7.6 minutes so in 57 minutes she will have run 7.5 miles
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Add sides 1


Subtract sides 4z



Divide sides by 6


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Subtract sides y


Divide sides by 2


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Thus the correct answer is :

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V=bh/3
V=(2*32)/3
V=64/3
V=21.3333 ( Round answer as needed)
Note: a² - b² = (a-b)(a+b)
9x² - 16y² = (3x)² - (4y)² = (3x - 4y)(3x + 4y)