A 10-ounce package of cashews costs $8.11, and a 16-ounce package of cashews costs $12.Calculate the cost per ounce of each package. Which package, the 10-ounce or the 16-ounce package, is the better buy? In the box below write the cost per ounce of each package and state which package is the better buy.

Step-by-step explanation:

Step one:

given data

we are told that 10 ounces cost $8.11

and also 16 ounces cost $12

Required

The unit cost per ounce

for the 10 ounce package

the unit cost = 8.11/10=$0.81 per ounce

for the 12 ounce package

the unit cost = 12/16=$0.75 per ounce

the better buy is  12-ounce package because the unit cost is cheaper than that of  the 10-ounce package by $0.06

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;