Ron is planning for the back-to-school rush at his store. Last year he estimated that he would need 168 notebooks, but he sold 200 notebooks. What was the percent error of Ron's estimate?

Question

Zhang

Mathematics

31 July, 06:33

Ron is planning for the back-to-school rush at his store. Last year he estimated that he would need 168 notebooks, but he sold 200 notebooks. What was the percent error of Ron's estimate?

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Answers (1)

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Colt Prince · Answer 1

I) 30 * 4 + (x - 30) * 5 < 200

(II) 20 * 4 + (x - 20) * 5 > 200

Restated:

(I) 120 + 5x - 150 < 200; 5x < 230

(II) 80 + 5x - 100 > 200; 5x > 220

220 < 5x < 230

44 < x < 46

There are exactly 45 students in the class.