Elena bikes 20 minutes each day for exercise. Write an equation to describe the relationship between
her distance in miles, D, and her biking speed, in miles
per hour, when she bikes at a constant speed of 15
miles per hour for the first 5 minutes, then at 12 miles
per hour for the last 15 minutes.

Acable company wants to provide cell phone service for residents on an island. the function for the cost of laying the cable from the island to the mainland is c(x)= 6.500 square root x2+4, where x represents the length of the cable in feet. what are the domain and range of the function? a) domain: all real numbers range: all real numbers greater than or equal to 17,000 b) domain: all real numbers greater than or equal to 0 range: all real numbers greater than or equal to 17,000 c) domain: all real numbers greater than or equal to 0 range: all real numbers greater than or equal to 13,000 d) domain: all real numbers greater than or equal to 13,000 range: all real numbers greater than or equal to 0

Astudent simplified a rational expression as shown.

Math each whole number with a rational, exponential expression