There are 500 500500 students in a high school senior class. Of these 500 500500 students, 300 300300 regularly wear a necklace to school, 200 200200 regularly wear a ring, and 125 125125 regularly wear a necklace and a ring. Using this information, answer each of the following questions. Let N NN be the event that a randomly selected senior regularly wears a necklace and R RR be the event that a randomly selected senior regularly wears a ring.

If x=-3 is the only x-intercept of the graph of a quadratic equation, which statement best discribes the discriminant of the equation?

Estimate the area under the curve f(x) = 16 - x^2 from x = 0 to x = 3 by using three inscribed (under the curve) rectangles. answer to the nearest integer.

According to the 2008 u. s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of california was approximately two times the population of florida. b. the population of florida was approximately twenty times the population of california. c. the population of florida was approximately two times the population of california. d. the population of california was approximately twenty times the population of florida.