What is the sale price of a $40 shirt that is on sale for 30% off?

According to the normal model, what percent of receivers would you expect to gain fewer yards than 2 standard deviations below the mean number of yards

Prove that 3: 8 is equivalent to 12: 32.a. use diagrams to support your answer.

Which is the focus of a parabola with equation y2=4x