Roberto purchased airline tickets for his family. the tickets cost $1,250. the airline also charged a luggage fee, bringing the total cost to $1,400. what is the percent increase in the cost due to the luggage fee?

Factor x2 – 8x + 15. which pair of numbers has a product of ac and a sum of what is the factored form of the

What is the absolute value of the complex number -4- 2 v14 3.15 14 18

Arandom sample of 45 observations results in a sample mean of 68. the population standard deviation is known to be 23 a. compute the margin of error at a 959% confidence interval. b. compute the 95% confidence interval for the population mean c. compute the 90% confidence interval for the population mean. d. compute the 75% confidence interval for the population mean