What is the initial upward velocity of a projectile fired at an angle of 40 m/s at an angle of 20o? a) 2 m/s b) 13.68 m/s c) 14.55 m/s d) 38 m/s

Let f(x) = x4- 8x2 . find the relativeextrema of this function using the second derivative test.

Which car has the most kinetic energy? a. a car of mass 1000 kg with a speed of 3 m/s b. a car of mass 2000 kg with speed 7 m/s c. a car of mass 1000 kg with speed 7 m/s d. a car of mass 2000 kg with speed 3 m/s

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid