Answer:
13
Step-by-step explanation:
if y = 4, then 4 + 9 = 13
the margin of error is 0.05
Margin of error = confidence interval ÷ 2
MOE = CI ÷ 2
Confidence interval CI = 0.2 - 0.1 = 0.1
MOE = CI ÷ 2 = 0.1 ÷ 2 = 0.05
(12*2)/2+1 > 24/2+1 > 12+1 > 13