The bill for dinner at a restaurant was $81.75. A sales tax of 7.5% was first added to the bill, and then an 18% gratuity will be added. What was the total bill for dinner?

Atown has a population of 12000 and grows at 3.5% every year. what will be the population after 7 years, to the nearest whole number?

Arandom sample of 15 observations is used to estimate the population mean. the sample mean and the standard deviation are calculated as 172 and 63, respectively. assume that the population is normally distributed. a. with 99 confidence, what is the margin of error for the estimation of the population mean? b. construct the 99% confidence interval for the population mean. c. construct the 95% confidence interval for the population mean. d. construct the 83% confidence interval for the population mean. hint: you need to use excel function =t. inv.2t to find the value of t for the interval calculation.

Arecipe calls for 3 ounces of flour for every 2 ounces of sugar. find the constant of proportionality.