3. (Cumulative Distribution Function, 30 points) Suppose a random variable X has CDF F(x) =    0, x < −10 0.25, −10 ≤ x < 30 0.75, 30 ≤ x < 50 1, x ≥ 50 Compute the following (a) P(X ≤ 50). (b) P(X ≤ 40). (c) P(40 ≤ X ≤ 60). (d) P(X < 0). (e) P(0 ≤ X < 10). (f) P(−10 < X < 10).

In the figure below, segment ac is congruent to segment ab: triangle abc with a segment joining vertex a to point d on side bc. side ab is congruent to side ac which statement is used to prove that angle abd is congruent to angle acd? segment ad bisects angle cab. triangle acd is similar to triangle abd. segment ad is congruent to segment ac. angle cab is congruent to angle cba.

You eat 8 strawberries and your friend eats 12 strawberries from a bowl. there are 20 strawberries left. which equation and solution give the original number of strawberries?

Aresearch group wants to find the opinions’ of city residents on the construction of a new downtown parking garage. what is the population of the survey downtown shoppers downtown visitors downtown workers city residents