20) Pythagorean Theorem A foot ladder rests against and reaches the top of a brick wall. The foot of the ladder is 4 feet away fro
the base of the wall. If the wall is 12 feet tall, how long is the ladder? Rourid to the nearest tenth of a
foot.
A. 11.3 feet
B. 12.6 feet
C. 16.0 feet
D. 74.0 feet

Equal numbers of moles of he(g), ar(g), and ne(g) are placed in a glass vessel at room temperature. if the vessel has a pinhole-sized leak, which of the following will be true regarding the relative values of the partial pressures of the gases remaining in the vessel after some of the gas mixture has effused?