Alast year survey conducted to 200 participants showed that the average cell phone bill for an individual user was $105 with a standard deviation $12. in order to estimate the population mean for this year, at 95% confidence and a margin of error not greater than $2, how much should the sample size be? use last year’s standard deviation as your planning standard deviation.

an

y = 6x -3y -12

y +3y +12 = 6x

=> . x = { 2y / 3 +2 } this is equation of line in terms of x

=> . if line meets the x-axis the co-ordinates of meeting point would be ( x , 0 )

=> . x = 2 ( 0 ) / 3 + 2

=> . x = 2

so, the point is ( 2 , 0 )

step-by-step explanation:

i think the answer is c sorry if it's wrong

      2

  2 is to go somewhat to the top right of a because it is squared    

v= a h/3