Lauren found the difference between 15.91 and 8.32 and got an answer of 7.59. Which expression below can be used to check her work? a. 8.32-7.59
b. 8.32+7.59
c. 15.91+8.32
d. 15.91+7.59​

The answer is B

Step-by-step explanation:

After subtracting 8.32 from 15.91, you get 7.59. If you add 8.32 and 7.59 you get back 15.91

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;

what level of math? also i don't need to be paid if i can you.