An observatory is shaped like a cylinder standing on one of its bases with a dome on top. The diameter of the floor of the observatory is 64 feet, as shown in the
diagram
64 ft
Which measurement is closest to the circumference of the base of the
observatory in feet?

Which values for a and b will create infinitely many solutions for this system of equations? ax-y=8 2x+y=b

The random variable x is the number of occurrences of an event over an interval of ten minutes. it can be assumed that the probability of an occurrence is the same in any two-time periods of an equal length. it is known that the mean number of occurrences in ten minutes is 5.3. the appropriate probability distribution for the random variable

If value of cos330° is √3/2 then find tan165°.