Question

a lawn is in the shape of a trapeziod with a height of 60 ft and bases of 30 ft and 170 ft. how many bags of fertilizer must be purchased to cover the lawn if each bag covers 3200 sq. ft
Ms. Sue
b1 = base 1
b2 = base 2

A = [(b1 + b2) * h] / 2

A = [(30 + 170) * 60] / 2

A = 12,000 / 2

A = 6,000 square feet

Take it from there.

http://www.mathgoodies.com/lessons/vol1/area_trapezoid.html

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