# prealgebra

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At the same time that a 60-foot tall building casts a shadow that is 21.5 feet long, a nearby tree casts a shadow that is 18 feet long. Which measure is closest to the height of the tree?

• prealgebra -

Cross multiply and solve for x.

60/21.5 = x/18

• prealgebra -

2

• prealgebra -

60/21.5 =x/18

• prealgebra -

50.2

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