ABCD is a non-isosceles trapezoid with AB || CD. PQRS is a quadrilateral formed by joining, in order, the midpoints of the sides of ABCD. Prove that PQRS is a parallelogram.

Jose predicted that he would sell 48 umbrellas. he actually sold 72 umbrellas. what are the values of a and b in the table below? round to the nearest tenth if necessary

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?

Find the area of a parallelogram with base 15 yards and height 21 2/3