)for a particular diamond mine, 77% of the diamonds fail to qualify as "gemstone grade". a random sample of 112 diamonds is analysed. find the probability that more than 81% of the sample diamonds fail to qualify as gemstone grade.

Which statements are true? check all that apply. the line x = 0 is perpendicular to the line y = –3. all lines that are parallel to the y-axis are vertical lines. all lines that are perpendicular to the x-axis have a slope of 0. the equation of the line parallel to the x-axis that passes through the point (2, –6) is x = 2. the equation of the line perpendicular to the y-axis that passes through the point (–5, 1) is y = 1.

Which expression is equivalent to 64 - 9x^2?

The diagram shows a cuboid abcdefgh abcd is a square with area 25cm². find the volume of the cuboid.