You order an appetizer for $8.99, 2 entrees for $9.99 each, and a dessert for $5.49. the sales tax is 4% and you leave a 15% tip based on the bill with sales tax. what is your total cost of your restaurant outing?

Danielle earns a 7.25% commission on everything she sells at the electronics store where she works. she also earns a base salary of $750 per week. what were her sales last week if her total earnings for the week were $1,076.25?

I’m confused on how to work the pie charts

The coverage of a base station of a telecommunication company forms a disk with a radius of (kilometers). let be the distance of a cellphone from a base station. assume that the location of cellphones in use are randomly uniformly distributed within the disk. calculate the mean and variance for the random variable.