Not sure how to due this problem.

a vehicle factory manufactures cars. the unit cost (the cost in dollars to make each car) depends on the number of cars made. if x cars are made, then the unit cost is given by the function c (x) = x^2 - 320x + 40,052 . what is the minimum unit cost? do not round your answer.

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;

answer: x=60

answer: 1inch=7days  

12inch=12*7=84days

step-by-step explanation: