Please give me the correct answer. T^T

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

The fence around a quadrilateral-shaped pasture is 3a^2+15a+9 long. three sides of the fence have the following lengths: 5a, 10a-2, a^2-7. what is the length of the fourth side of the fence?

Complete the conditional statement. if a + 2 < b + 3, then a < b b < a a – b < 1 a < b + 1