Sergio runs 2 1/4 miles in 30 minutes. write the ratio in fractional form and determine sergio's speed in miles per hour.

The lengths of nails produced in a factory are normally distributed with a mean of 4.91 centimeters and a standard deviation of 0.05 centimeters. find the two lengths that separate the top 4% and the bottom 4%. these lengths could serve as limits used to identify which nails should be rejected. round your answer to the nearest hundredth, if necessary.

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?