In 3 months harold watched a total of 40 movies if he watch 12 movies in june and 13 movies in july how many movies did he watch an august write an equation using the variable a to model your work

15 movies because 12+13=25 and 40-25 is 15 movies in august

40=12+13+a

40=  15+a

-15   -15

25=a

2

step-by-2step 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;