Answer
a) Precalculus
Area= 10 sq. units
b) Calculus required
Area= 5 sq. units
Work Step by Step
a) Area = \frac{1}{2}bh = \frac{1}{2}(5)(4) = 10 sq. units
b) Area = bh = 2(2.5) = 5 sq. units
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