Someone please help me!! I’m in a hurry

The graph below shows the height of a projectile t seconds after it is launched. if acceleration due to gravity is -16 ft/s2, which equation models the height of the projectile correctly?

Explain how you can find the missing fraction in 3 4/5 / (blank) 2 5/7. then find the missing fraction.

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?