Which statement is true for all regular pyramids? a) the length of the altitude is equal to the length of the slant height***
b) all lateral faces are congruent isosceles triangles
c) the base and the faces are similar polygons d) all edges are equal in lenght

(-9,7), (6,2) write an equation in point-slope form of the line that passes through the given points, then write the equation in slope-intercept form

If the measure of xyz is 81 what is the measure of yz

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?