Whats the quickest way to solve this?
5^21x4^11= 2x10^n
answer:21
this is from the Gmac practice test
5^21x4^11= 2x10^n
answer:21
this is from the Gmac practice test
5²¹ * 4¹¹ = 2 * 10^navada wrote:Whats the quickest way to solve this?
5^21x4^11= 2x10^n
answer:21
this is from the Gmac practice test
5²¹ * 4¹¹ = 2 * 2^n * 5^n.
Since the lefthand side has 5²¹, so must the righthand side.
Thus, n=21.
