A square pyramid and a triangular pyramid each have a base that measures 36 square inches. The volume of the square pyramid is twice as large as that of the triangular pyramid. What can be said about the heights of the pyramids?

The ages of personnel in the accounting department of a large company are normally distributed with a standard deviation of 7 years. there is a 0.02275 probability that the age of any randomly chosen person in the department is less than 22 and 0.15866 probabilty that the age of any randomly chosen person is greater than 43. what is the mean of this distribution?