Tennis balls cost $7 for a can of 3 he gives the cashiet $40 for the balls and receives$12 in change how many balls did steve buy?

If a clock aboard a space ship traveling at 0.900 c of the speed of light relative to earth chimes once at the beginning of the hour and again when it reads one hour later, how much time would an observer on earth say elapsed between the two chimes?

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest

Acar drives toward the right over the top of a hill, as shown below. which arrow represents the centripetal acceleration? w x y z