Two cars start at the same point and at the same time. One travels
west at 65mph and the other travels north at 50mph. At what rate is
the distance between the two cars changing after 1/2 hour?

In the following situation, determine whether you are asked to determine the number of permutations or combinations. then do the calculation how many ways are there to pick a starting five from a basketball team of twelve members? a. permutation; ps - 2520 b. combination; 1c, - 792 c. combination: 2cs - 2520 d. permutation; ps - 95040

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

Does the point (1, sqrt 7) lie on circle shown.