I don’t understand this at all tbh

Your family has $745 for vacation. they spend 40℅ of the money on a hotel. they spend the remaining 1/3 on food. enter the amount of money your family will have left for activities

Which of the following situations represents a linear relationship? a. theresa increases the distance she runs by 0.1 miles every week. b. the volume of a box depends on the length of box. c. the amount of money in a bank account increases by 1 percent each year. d. the population of a town doubles every 5 years.

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?