Solve for x. Please help

Answer this question only if you know the answer! 30 points and

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section

Clarence wants to buy a new car. he finds an ad for a car that costs 27,200 dollars. suppose his local sales tax is 7%. -how much would he have to pay? -what is the cost of the car including tax? -if clarence has 29,864 saved, can he pay cash to buy the car?