SOLUTION: If a and b are positive and 16a^3 * b^-4 = 2a what is a^-2 in terms of b?
(A) -8b
(B) 1/(8b^4)
(C) 8/(b^4)
(D) 4b
(E) 4b^4
Algebra.Com
Question 1202587: If a and b are positive and 16a^3 * b^-4 = 2a what is a^-2 in terms of b?
(A) -8b
(B) 1/(8b^4)
(C) 8/(b^4)
(D) 4b
(E) 4b^4
Answer by greenestamps(13198) (Show Source): You can put this solution on YOUR website!
On both sides, multiply by b^4 and divide by 2a to separate the a's and b's.
We want the value of a^-2; so take the reciprocal of both sides of the equation.
Multiply by 8 to get the desired expression on the left.
ANSWER: (C)
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