Polygon pqrst shown below is dilated with a scale factor of 3, keeping origin as the center of dilation. which statement about polygon pqrst and its image after dilation, polygon p'q'r's't', is correct? select one:
a. the length of side pt is equal to the length of side p't'.
b. the measure of angle t is equal to the measure of angle t'.
c. the length of diagonal rt is equal to the length of diagonal r't'.
d. the measures of angle p and angle p' are in the ratio 1: 3.

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.