Ris is building a model of the washington monument. her model measures 15 in. tall and is 1.5 in. wide at the base. the actual width measurement at the base of the washington monument is about 55 ft. about how tall is the washington monument? a) 500 ft b) 550 ft c) 600 ft d) 650 ft

The correct answer is B.  You can create a proportion using the information given and then solve for the missing height of the Washington Monument.

15 inches tall    =  x feet tall
1.5 inches wide     55 feet tall

Use cross products to solve for x.

15 x 55 = 1.5x
825 = 1.5x
1.5     1.5
x = 550 feet
The height of the Washington Monument is approximately 550 feet tall.

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