The price of an all-access ticket to the fair is $42.99 before tax. Ronny bought the all-access ticket for 50% off. He then paid 7% sales tax on the discounted price. (Sales tax is found after applying any discounts). Part A: How much did Ronny pay in sales tax? Show all work and steps in your solution. (5 points) Part B: What is the total amount that Roland paid for the ticket? Show all work and steps in your solution. (5 points)

A: $1.50 B: $22.99

Step-by-step explanation:

A: multiply 42.99 by 0.5 (50% in decimal) to get discounted price.. Then, multiply that #, 21.49, by 0.07 (7% in decimal) to get 1.50

B: add 21.49 to 1.50 to get 22.99

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;