HELPPP QUICK!! let f(x) = -.5(x-8)^2 - 2. what is the average rate of change for the quadratic function from x = -4 to x = 8

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

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.

We have 339 ounces of jam to be divided up equally for 12 people how muny ounces will each person get