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Find all the real square roots of 0.0081 a.0.9 and -0.9 b. 0.0405 and -0.0405 c. 0.2846 and -0.2846 d. 0.09 and -0.09

Find all the real square roots of 0.0081 a.0.9 and -0.9 b. 0.0405 and -0.0405 c. 0.2846 and -0.2846 d. 0.09 and -0.09
asked 140k views
3 votes
Find all the real square roots of 0.0081

a.0.9 and -0.9
b. 0.0405 and -0.0405
c. 0.2846 and -0.2846
d. 0.09 and -0.09

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User Refaat
by
8.7k points

1 Answer

6 votes
The answer will be d. With decimals, the order of magnitude will decrease when multiplied. as 0.0081 is to the third decimal place you know the answer will be to the second decimal place leaving 0.09 and -0.09. It has to be 9 as 9^2 is 81
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User Facundo Corradini
by
8.2k points
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