Question

A business owner wants to have a rectangular parking lot resurfaced. The lot is 93 feet long by 58 feet wide. Basesd on a cost of $2.47 per square foot, the owner incorrectly estimated that it would cost $12,000 to have the lot resurfaced. Which could be used to get an estimate that is closest to the actual cost of resurfacing the parking lot?



Choices:

100 x 60 x 1.5
100 x 60 x 2
90 x 60 x 2
90 x 60 x 1.5

Answers

Steve
Rounding each value to the nearest single-significant-digit approximation, that would be

90x60x2

I'd choose that instead of 100*60 because in that case both values are rounded up, making the estimate too high.
Damon
LOL, well there is one sure way to find out

93 * 58 * 2.47 = 13,323.18
now
6000*1.5 = 9,000
6000*2 = 12,000
the last two are even lower
moby
Thanks guys that makes sense now. And especially thank you because you explained it in detail not just giving me the answer so i can really understand. :)) You guys are awesome:) Hope I can ask another question later if needed.
Damon
You are welcome :)
Steve
Good call, Damon. By rounding down to 90 I neglected the rather sizable underestimate of 2.47 by 2.00.

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