100 free points and free brainliest to whoever answers 1st also how are u doing?

Have a amazing day and god bless you! <3

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

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

Find the area of the triangle formed by the origin and the points of intersection of parabolas y=−3x^2+20 and y=x^2−16.