If you roll a 6-sided die, what is the probability of not getting a 4?

What three-dimensional solid have 6 rectangular faces, 2 equal bases that are not rectangles and 18 edges

Atest consists of 10 multiple choice questions, each with 5 possible answers, one of which is correct. to pass the test a student must get 60% or better on the test. if a student randomly guesses, what is the probability that the student will pass the test?

Find the volume of the solid bounded by the plane z=0 and the paraboloid z=1-x^2 –y^2