Bill measures the circumference of a circular fish pond to be 28 ft. what is the diameter of the fish pond, rounded to the nearest foot? use 3.14 to approximate pi. ft

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?