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
20 to the second power is more commonly known as 202 or 20 squared. Squaring is calculated by taking two of the number and multiplying them together. In this case, 20x20=400 and so 20 to the 2nd power is 400.