Problem:
The value of the expression (29.7)(399)4(304)5 is closest to
Answer Choices:
A. .003
B. .03
C. .3
D. 3
E. 30
Solution:
Estimate each of the quantities to obtain the approximation:
30(400)4(300)5=30300(400300)4=10(43)4=10(25681)≈10(31)≈3.
Answer: D.
The problems on this page are the property of the MAA's American Mathematics Competitions