A rectangular pyramid has a base that is 10 millimeters long and 10 millimeters wide. The pyramid's slant height is 11 millimeters. What is its surface area?

Find the solution of system of equation y= x-4 y=4x+2

The krasnapolski is a top-of-the-line hotel in amsterdam, the netherlands. among their many services, they rent bicycles to guests. the bicycle checkout is open 24 hours per day 7 days per week and has 50 bicycles on hand. on average, 10 guests request a bicycle each day, arriving completely randomly at all times of the day during the spring and summer seasons. guests keep bicycles for four days on average, with a standard deviation of two days. how long does a guest on average have to wait for a bike? a. approximately 24 hours b. approximately 0.033 hours c. approximately 4 days d. approximately 47 minutes

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.