There is a new treatment to help smokers stop smoking. In an experiment, 90% of 300 smokers quit after 15 days of treatment. Which of the following is the 95% confidence interval?

x = 12

y = 15

step-by-step explanation:

x =±sqrt(1/3)

step-by-step explanation:

x+4/6x=1/x

multiply each side by 6x to get rid of the fractions

6x*(x+4/6x)=1/x*6x

distribute

6x^2 +4 = 6

subtract 4 from each side

6x^2 +4-4 = 6-4

6x^2 =2

divide by 6

6x^2/6 = 2/6

x^2 = 1/3

take the square root of each side

sqrt(x^2) = ±sqrt(1/3)

x =±sqrt(1/3)

if you was gonna solve for a, a is a   < -12

a

step-by-step explanation: