Lacy is shoveling driveways. She has shoveled 9 driveways out of the 12 driveways in her neighborhood. What percent of the driveways does Lacy still have left to shovel?

chase is right because he already been to the swings and he know how far it will be to get there

step-by-step explanation:

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;

15 / 2 = 7.5

100 / 7.5 = 13.