2. Selena manages a landscaping company and purchases her materials from the local lumberyard, where she has a charge account. Last week, Selena's
company purchased 48 landscaping timbers at $4.55 each, 80 cubic yards
of mulch at $29.95 per cubic yard, and 90 flats of bedding plants at $4.88
per flat. She must also pay a 6.5% sales tax on all purchases. What was the
balance of Selena's landscaping company's charge account at the end of the
week?

answer: f = 32.2m

step-by-step explanation: that is the 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;