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

You receive 15% of the profit from a car wash how much money do you receive from a profit of 300

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

Rhombus adef is inscribed into a triangle abc so that they share angle a and the vertex e lies on the side bc . what is the length of the side of the rhombus if ab=c, and ac=b.