8
13
88
20
25
1 over 5^2. which is 1/25
380
-8
m^4 n^5 - m^20 n^21
when they say a number is "to a power" like "5 to the second power" its the same thing as 52 read "5 squared" to solve this all you have to do is 5x5=25. if you have "3 to the fourth power" you would do 34 which is the same as 3x3x3x3=81.
log(202) = 2log(20) = 2*1.30103 = 2.60206
Solve the exponent first and then subtract it! Ex 5 to the 2 power-20 5 to the 2power = 25-20=5!!