An object is thrown upward at a speed of 64 feet per second by a machine from a height of 16 feet off the ground. the height h of the object after t seconds can be found using the equation h=−16t^2+64t+16when will the height be 73 feet? round to two places.

Write down two additional questions about earth's magnetic field that will make your presentation more informative.

Atennis player used a tennis racket to hit a tennis ball with a mass of 0.25 kg with a force of 5.25 newtons. how does the force the tennis racket exerted on the tennis ball compare with the force the tennis ball exerted on the tennis racket? a. the force of the tennis racket on the tennis ball is equal in magnitude and opposite in direction to the force the tennis ball exerted on the tennis racket. b. the force of the tennis racket on the tennis ball is equal in magnitude and in the same direction as the force the tennis ball exerted on the tennis racket. c. the force of the tennis racket on the tennis ball is less in magnitude and in the same direction as the force the tennis ball exerted on the tennis racket. d. the force of the tennis racket on the tennis ball is greater in magnitude and opposite in direction as the force the tennis ball exerted on the tennis racket.

3. which is not a primary color of light? blue red green yellow