Answer each part. If necessary, round your answers to the nearest hundredth. At Hoffman's Bike Rentals, it costs $21 to rent a bike for 4 hours.
How many hours of bike use does a customer get per dollar?
hours per dollar

Standard deviation of 19,29,21,22,23

Aproduction manager test 10 toothbrushes and finds that their mean lifetime is 450 hours. she then design sales package of this type of toothbrush. it states that the customers can expect the toothbrush to last approximately 460 hours. this is an example of what phase of inferential statistics

What are the measures of angles a, b, and c? show your work and explain your answers. 25 points