Hey there! This is my last math question of the day! Please, do me a favor and help me out! Please remember I need an inequality for this answer! Thanks!

Select all the statements that apply to this figure

The power generated by an electrical circuit (in watts) as a function of its current c (in amperes) is modeled by p(c)= -15c(c-8) what current will produce the maximum power?

When you find the area of a triangle do you use in. or in2