3 years ago

Exspress 6489 in standard form

Mathematics

1 answer:

ycow [4]3 years ago

8 0

Hi! The answer is
6.489 * 10^3

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3 years ago

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3 years ago

Simplify. (-2)^-3 A.-8 B.-1/8 C.1/8 D.8

DiKsa [7]

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We want to simplify;

${( - 2)}^{ - 3}$

Recall that,

${a}^{ - m} = \frac{1}{ {a}^{m} }$

${( - 2)}^{ - 3} = \frac{1}{{( - 2)}^{ 3}}$

We multiply out to get,

${( - 2)}^{ - 3} = \frac{1}{{- 2} \times - 2 \times - 2}$

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The correct choice is B.

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3 years ago