If 5^21 X 4^11 = 2x10^n. What is the value of n?
Answers: A) 11 B) 21 C) 22 D) 23 E) 32
If 5^21 x 4^11 = 2x10^n what is the value of n   4^11 = (2^2)^11 = 2^22   10^n = (5x2)^n = 5^n x 2^n   5^21 x 2^22 = 2x 2^n x 5^n = 2^n+1 x 5^n = 2^22 x 5^21   n = 21   Option 21
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If 5^21 X 4^11 = 2x10^n. What is the value of n?