Can anyone please help me with this please

1. A rocket carrying fireworks is launched from a hill 80 feet above a lake. The rocket
will fall into lake after exploding at its maximum height. The rocket's height above
the surface of the lake is represented by h = – 16+ 64 t + 80. How many
seconds after the rocket launched will it hit the lake?

After two years, how much has been paid into interest?

Find an equation for the linear function which has slope -10 and x-intercept -7

Aclassroom is made up of 11 boys and 14 girls. the teacher has four main classroom responsibilities that she wants to hand out to four different students (one for each of the four students). if the teacher chooses 4 of the students at random, then what is the probability that the four students chosen to complete the responsibilities will be all boys?