An equilateral triangle is circumscribed about a circle with a radius of 15 ft. Find the area of the shaded region shown.

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?

Find the zero function by factoring (try to show work) h(x)=-x^2-6x-9

Table which ratio is equivalent to 3: 7? 6: 7 3: 21 24: 56 15: 30