How can I solve this question?
What is n?
5^21 * 4^11 = 2 * 10^n
I know the answer is 21. How do I get there?
Thanks
What is n?
5^21 * 4^11 = 2 * 10^n
I know the answer is 21. How do I get there?
Thanks
feeet wrote:How can I solve this question?
What is n?
5^21 * 4^11 = 2 * 10^n
I know the answer is 21. How do I get there?
Thanks
Exponents keyword : SIMPLIFY
5^21 * 2^11 * 2^11 = 2 * 2^n * 5^n
5^21 * 2^22 = 2^(n+1) * 5^n
compare exponents since bases are same
compare the power raised to 2
n+1 = 22
n= 21
or
compare the power raised to 5
n=21
Hope this helps.
