7 Select the correct answer from each drop-down menu. Complete the statements about these similar pyramids. Pyramid A E Pyramid B W 15 m 5 m 1 H Z Z F G х Y The ratio of the heights is The ratio of the base areas is The ratio of the volumes is Net

If x + 10 = 70, what is x? a. 40 b. 50 c. 60 d. 70 e. 80

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?

Given the points a(-2, 1) and b(8, 6), find the coordinates of the point c on directed line segment ab, that partitions ab in the ration 2: 3.