Johnny barber took golf lessons. his clubs cost $425, balls cost $12.50, shoes cost $49.50, his golf shirt was $37, and his glove was on sale for $19.95. he paid 5% sales tax on his purchase. his lessons cost $20.00 per lesson for 12 lessons. what is the total cost of his purchase and lessons?

The weight of full–grown tomatoes at a farm is modeled by a normal distribution with a standard deviation of 18.4 grams. the 95 percent confidence interval for the mean weight of the tomatoes is calculated using a sample of 100 tomatoes. what is the margin of error (half the width of the confidence interval)?