it takes esther 12 minutes to ride a roller coaster four times. write an rquatio to represent the proportional relationship between the number of rides and the total amount of time

The difference of 2 numbers is 21 and the quotient of the equation is 4 then what are the two numbers?

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.

Ahyperbola centered at the origin has a vertex at (-6,0) and a focus at (10,0)