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Evaluate 0.0028213/0.634 in standard form
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Evaluate 0.0028213/0.634 and give your answer in standard form

A. 4.45 x 10-3

B. 4.45 x 10-6

C. 4.45 x 10-5

D. 4.45 x 10-4

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peter
Asked by peterrep:1.4K
University of Lagos Nigeria
06 May 2020

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judziy
Judziy answeredrep:1.4K
University of Benin Nigeria
13 May 2020
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0.0028213 = 2.8213 x 10-3

0.634 = 6.34 x 10-1

from indices, 

0.0028213/0.634 = (2.8213/6.34) x 10-3-(-1)

= (2.8213/6.34) x 10-3+1

= (2.8213/6.34) x 10-2

= 0.445 x 10-2

= 4.45 x 10-1 x 10-2

Also, from indices, 

= 4.45 x 10-1 + (-2)

= 4.45 x 10-1 - 2

= 4.45 x 10-3

Ans A

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