What is 16 less 5 as a numerical expression?

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?

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

We have 339 ounces of jam to be divided up equally for 12 people how muny ounces will each person get