Two commercial jets flying at 40,000 ft. are flying towards an airport. Plane A, 100 miles from the airport, is flying south at 520 mph while plane B, 240 miles from the airport, is 240 is flying west at 450 mph. How fast is the distance between the two planes changing at this time?

Alex drew a circle with right triangle prq inscribed in it, as shown below: the figure shows a circle with points p, q, and r on it forming an inscribed triangle. side pq is a chord through the center and angle r is a right angle. arc qr measures 80 degrees.

Abaker makes 186 cookies. some are chocolate chip and some are oatmeal raisin, and both kinds are made with and without nuts, as shown in the table above. because they are more popular, the baker made 2/3 of the cookies chocolate chip. if a chocolate chip cookie is chosen at random, what is the probability that it will have nuts? a) 21/93 b) 21/62 c) 41/93 d) 21/41

What is the equation of the graph below? y=sec(x)-4