Which property makes a rectangle a special type of parallelogram?

a. the opposite angles are congruent.
b. the diagonals are congruent.
c. the opposite sides are parallel.
d. the consecutive sides are congruent.

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.

Let event a = you roll an even number on the first cube.let event b = you roll a 6 on the second cube.are the events independent or dependent? why?