Your classmate is starting a new fitness program. he is planning to ride his bicycle 45 minutes every day. he burns 10 calories per minute bicycling at 11mph and 13.75 calories per minute bicycling at 15 mph. how long should he bicycle at each speed to burn 600 calories per hour?

The lengths of two sides of a triangle are 9 and 15. what can be said about the length of the third side? a. it must be greater than or equal to 6 and less than 24. b. it must be greater than or equal to 6 and at most 24. c. it must be greater than 6 and less than 24. d. it must be greater than 6 and at most 24.