A hammer thrower can spin at 1.5 rps. If the length of the hammer is 5 feet and his arms are 32 inches long, how fast does the hammer leave his hand in
ft/sec?

Elena and her husband marc both drive to work. elena's car has a current mileage (total distance driven) of 15,000 and she drives 23,000 miles more each year. marc's car has a current mileage of 46,000 and he drives 9,000 miles more each year. will the mileages for the two cars ever be equal? explain.

Which one ? is the answer and how to find this answer

Evaluate cos2θ for cosθ = square root of 3/2