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Sagot :
Answer:
A = 0.16
Step-by-step explanation:
Step 1) it is known that B^2 = A - therefore 8^2 = 64.
Step 2) since B in the question = 0.4 (see it as 4/10) - logically - you square the numerator and denominator to get (4^2/10^2) - then solve the exponents to get (16/100) or 0.16
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