THE CORRET IS THE LETTER C
Powerss of three are 3&+^x
lets try trial and error
3^1=3
3^2=9
3^3=27
3^4=81
3^5=243
3^6=729
3^7=2187
3^7 is more than 100 so the answer would be the powers up to 6
100,200,300,400,500,600,700,800,900.
To do the mean of the numbers, you have to add them all together and divide them by the number of numbers:
65 + 125 + 90 + 100 = 380
There are 4 numbers, so you have to do
380 ÷ 4 = 95
The mean of those numbers is 95
All you have to do is find 40% or .4 of 90.
90 x .4 = 36
36$ is the mark up, so the total price would be 126$.
