At a carnival the tea cups spin at a rate of 10 rpm how long will it take for the tea cups to spin 43.5 times

The length of the line segment joining the midpoints of sides ab and bc of the parallelogram abcd is 10. find the length of diagnol ac

The serenity and the mystic are sail boats. the serenity and the mystic start at the same point and travel away from each other in opposite directions. the serenity travels at 16 mph and the mystic travels at 19 mph. how far apart will they be in 3 hours?

Given the net of the rectangular prism, what is its surface area?