If n is an integer and 5^n > 40,000,000,000, what is the least possible value of n?  Select:  A) 16  B) 8  C) 9  D) 10  E) 11
When you seperate the 40000000000 into factors of 5 and 2 you get - &gt; 10^10 x 2^2 = 5^10 x 2^12   2 to the ^ 8 = 4096 so its4096 x 5^10   that means 5^10 x 5^x must be greater   5^x &gt; 4096   5^1=5   5^2=25   5^3= 125   5^6= 15625 - &gt; so x must be at least 6   5^(10+6)= 5^16   16
<result>A</result>
If n is an integer and 5^n > 40,000,000,000, what is the least possible value of n?