Please help thank you so much

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180

Find the value. a. 0.003 b. 0.03 c. 0.3 d. 3

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?