Melaniedawson334 Melaniedawson334

20-02-2017
Mathematics

contestada

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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brittneyrost brittneyrost

20-02-2017

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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