Use for questions 37-40: The 100-meter dash times in the girls track meet were normally distributed with a mean of 13 seconds and a standard deviation of 0.3 seconds. Lana finished the race in 13.2 seconds. If 84 other girls ran in the event, approximately how many runners did she beat?

Which values for a and b will create infinitely many solutions for this system of equations? ax-y=8 2x+y=b

One expression below in undefined, and the other expression has a well defined value. which expression is undefined and explain why it has no value. which expression is defined? what is the value of that expression and how do you know? what is a different expression using a trig inverse function that is also undefined?

Josephine has a great garden with and area of 2x2 + x - 6 square feet