If 5^21 * 4^11 = 2*10^n, what is the value of n?
A. 11
B. 21
C. 22
D. 23
E. 32
OA B
5^21 * 4^11 = 2*10^n
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Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001
www.manyagroup.com