Rosa bought 90 feet of rope for ​$20.70. She needs 50 more feet. If the unit price is the​ same, how much will she pay for the extra 50 feet of rope​?

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.

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?

Which of the following contains a variable?