Please help me I don’t know! the bottom numbers are 0,4,8

Atriangular bandana has an area of 46 square inches. the height of the triangle is 5 3 4 inches. enter and solve an equation to find the length of the base of the triangle. use b to represent the length of the base.

Last one and the bottom answer choice is y=(x-4)^2+1 you guys!

Acd that is originally priced at $15.85 red-tagged for the sale. what is the sale price of the cd