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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
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Feb 14, 2018
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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
Mathematics
high-school
Refaat
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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
Facundo Corradini
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Feb 21, 2018
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Facundo Corradini
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