Cho hình chóp SBCDA có đáy ABCD là hình vuông cạnh a , mặt bên (SAD) vuông góc vs (SAD) và SAD là tam giác đều . M là trung điểm của AD . Tính góc giữa (SAB) với (ABCD)

Hey free points ! people i have a few math questions on my profile consider looking at them i have to get done in 30 mins!

The serenity and the mystic are sail boats. the serenity and the mystic start at the same point and travel away from each other in opposite directions. the serenity travels at 16 mph and the mystic travels at 19 mph. how far apart will they be in 3 hours?

Marking brainliest rewrite the equation x = 65 - 60p by factoring the side that contains the variable p.