The cost to mail a letter is a base charge of $0.42 plus $0.17 for each ounce. write an equation that could be used to find how many ounces a letter that costs $0.93 weighs. (let x represent the number of ounces.) 0.59x = 0.93 0.42x + 0.17 = 0.93 0.59 = 0.93x 0.42 + 0.17x = 0.93

I'm not 100% sure on this but I believe the answer is D.) 0.42 + 0.17x = 0.93

Please correct me if I'm wrong.. Hope this helps!

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;