Is -3/4 greater or less than -.75

Which graph shows a function with a range of all real numbers greater than or equal to -1

How can you decide witch operations to use to slice a two step equation

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.