Achild's piggy bank contains nickels, dimes, and quarters. altogether there are 50 coins totaling $5.75. if the number of nickels is twice the number of quarters, how many of each type of coin are in the piggy bank

What is the value of x? enter your answer in the box. (cm)

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.

Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?