Use mental math to figure out
1. 28+ 65.

2. 14+ 6+ 57

3. 80 + 40 + 170

4. 432 +250

5. 82 - 37

6. 1245 - 320

7. 532 - 116

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 is the model?

step-by-step explanation:

answe: it will take 4.5 hours for naomi and clair to paint an equal number of square feet

hope i

-lavira : )