Basic College Mathematics (10th Edition)

Published by Pearson
ISBN 10:
ISBN 13:

Chapters 1-4 - Decimals - Test - Page 328: 28

Answer

Estimate: $(8\times20)+(10\times30)$=160+300=460 students Exact: 488 students

Work Step by Step

8 classrooms with 22 students each 12 classrooms with 26 students each Total Students: $(8\times22)+(12\times26)$ Now, Let's find estimate 22 (round to) 20 12 (round to) 10 26 (round to) 30 $(8\times20)+(10\times30)$=160+300=460 students Exact: $(8\times22)+(12\times26)$ = 176+312 = 488 students
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