Pls me get these answers: 7,8,9,10

An athlete performing a long jump leaves the ground at a 27.0 degree angle and lands 7.80m away. what was the takeoff speed?

In the absence of friction, gravity, and all other external forces, what kind of speed will an object display if it travels from the bottom to the top of an inclined plane? a. constant speed b. increasing speed c. decreasing speed d. speed increases and then decreases e. speed decreases and then increases

Many young black ambitious musicians migrated to harlem around 1940, where they found an alternative music scene in the after-hours that allowed them to play what they wanted to play, experiment with new harmonic concepts, and work on extending the technical mastery of their instruments.