Please help!

Tell if each of the following numbers is rational or irrational, providing a
reason to justify your
(a) 0.3
(b) 5/13
(c) square root of 8
(d) cube root of 8

The height of a flare fired from the deck of a ship in distress can be modeled by h(t)= -2(8t^2-52t-28), where h is the height of the flare above water and t is the time in seconds. a. find the time it takes the flare to hit the water.

I’m on question 7 it says a covered water tank is in the shape of a cylinder the tank has a 28 inch diameter and a height of 66 inches to the nearest square inch what is the surface area of the water tank

What is mean median mode and range?