If you can bike 15 miles per hour, how long will it take you to bike 5 miles?

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

The revenue each season from tickets at the theme park is represented by t(c)=5x. the cost to pay the employees each season is represented by r(x)=(1.5)^x. examine the graph of the combined function for total profit and estimate the profit after four seasons

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.