In May, Xavier, Yu Xuan and Zeta saved a total of $1830. In June, Xavier increased his savings by $270, Yu Xuan doubled her savings and Zeta reduced her savings by $150. Each of them had the same amount of savings in the end. How much did Zeta saved in June?

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

Which of the following equations is of the parabola whose vertex is at (4, 3), axis of symmetry parallel to the y-axis and focus at (4, -3)? a.) y+3=1/24 (x+4)^2 b.)y-3=-1/24 (x-4)^2 c.)x-4=-1/24 (y-3)^2

Mr.walker is looking at the fundraiser totals for the last five years , how does the mean of the totals compare to the median?