Find the surface area of the triangular pyramid

I'm so close to finishing all these.

Choosing a booth location: your manager is sending two people to work at the conference. she wants a booth that will give your company good visibility for no more than 35% of the total budget ($3000). the conference coordinator just told you there are only five booths left. which booth will you choose? write the inequality that shows how much money you can spend on the booth simplify the inequality that shows how much money you can spend on the booth.

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.