Cocaine users commonly snort the powder up the nose through a rolled‑up paper currency bill. spain has a high rate of cocaine use, so it's not suprising that euro paper currency in spain often shows traces of cocaine. researchers collected 20 euro bills in each of several spanish cities. the plus four method is particularly useful when there are no successes or no failures in the data. the study found that in seville, all 20 of a sample of 20 euro bills had cocaine traces. (a) what is the sample proportion p^ of contaminated bills? (enter your answer rounded to a whole number.)

If f(x)= 3x+6 which of the following is the inverse of f(x)

The accompanying table shows the numbers of male and female students in a particular country who received bachelor's degrees in business in a recent year. complete parts (a) and (b) below. business degrees nonbusiness degrees total male 189131 634650 823781 female 169539 885329 1054868 total 358670 1519979 1878649 (a) find the probability that a randomly selected student is male, given that the student received a business degree. the probability that a randomly selected student is male, given that the student received a business degree, is nothing. (round to three decimal places as needed.) (b) find the probability that a randomly selected student received a business degree, given that the student is female. the probability that a randomly selected student received a business degree, given that the student is female, is nothing. (round to three decimal places as needed.)

Abcd is a square. what is the measure of angle bac