Identify two types of simple machines in this compound machine

F(x) = (x^2 + 3x − 4) and g (x) = (x+4) find f/g and state the domain.

What is the volume of the sphere shown below with a radius of 3?

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.