Mrs. Hernanadez is covering the top of a kitchen shelf that is 26 3/8 inches long and 15 1/2 inches wide. She incorrectly measures the length to be 25 inches long. How will this error affect her calculations?
a.
It will cause her to overestimate the shelf by about 25 square inches
c.
It will cause her to overestimate the shelf by about 21 square inches
b.
It will cause her to underestimate the shelf by about 25 square inches
d.
It will cause her to underestimate the shelf by about 21 square inches

Question

jhonyy9 · Answer

do you can reposting these jpg. files here please using the Attach File button below to this window ?

Vocaloid · Answer

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Vocaloid · Answer

the entire rectangle is the actual area of the shelf
the left rectangle is what she estimated the shelf to be

clearly she underestimated a bit so eliminate choices A+B

you can find the area she "missed" by calculating the area on the rectangle on the right

it has length 15 and a 1/2, and width (26 and 3/8 - 25)
calculate this area (try estimating first, and if that doesn't narrow it down enough, try an exact solution)