Chad has to make 1000 toys. Each toys needs a zipper. Zippers packs are 100 pieces for $9.99. Chad wants to know how many packs he needs to buy to make his toys?​

{3 + i, 3 - i, 3, -1}

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;

yes

step-by-step explanation:

they have to be opposite and reciprocal of eachother.