Peter paid $12.83 for a dvd. the price of the dvd was $11.99. how much sales tax did peter pay?

The ratio pv to nrt is plotted against pressure for ch4 at 0°c and 200°c. why does the curve for 0°c drop below the horizontal line for an ideal gas whereas the curve for 200°c does not?

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

Aconstruction worker has rope 9 m long he needs to cut it in pieces that are each 3 /5 m long how many such pieces can he cut without having any rope leftover?