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Approximating Cube Roots
Worksheet
Grade Level
Grade 8
8.11 Approximating Cube Roots
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Which statement best justifies that the cube root of 999 rounds to 10.0 to the nearest tenth?
A
Because 9.0
3
= 729, so 999 rounds to 9.0.
B
Because 10.0
3
= 1000 and 9.9
3
= 970.299, so 999 is much closer to 1000.
C
Because 999 is almost 100, so the cube root is about 10.
D
Because 999 divided by 3 is 333, and 333 is near 10.
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