What is the mass of an object that has a density of 3.2 g/cm^3 and a volume of 5.5cm^3? (the density of an object has the equation d = m/v.)

A6.0-kilogram cart initially traveling at 4.0 meters per second east accelerates uniformly at 0.50 meter per second squared east for 3.0 seconds. what is the speed of the cart at the end of this 3.0 second interval? (1) 1.5 m/s (3) 3.0 m/s (2) 5.5 m/s (4) 7.0 m/s