Mean is just the average of all of them
So... 5 + 4 + 18 + 19 + 12 + 20 + 12 + 12 = 102
Then you divide that number by the amount of numbers you have so 102 / 8 = 12.75 or rounding it up to 13
For median you have to first put them in order from smallest to largest.
So 4 5 12 12 12 18 19 20
Then you have to find the middle number between them but in this case we have two... 12 and 12. Since they're the same number, the median is 12.
The rational exponent will have the root as the deminator and the power as the numerator.
So for this one the expression is
x^5/6
1/3 ÷ 3 =
for each
Luke will stay with a total of:
(x 3) =
Hope it helped!
