Consider five vendors at a swap meet. christine sells blankets and buys sunglasses. dyanne sells sunglasses and buys socks. eric sells pillows and buys sneakers. german sells socks and buys blankets. amanda sells sneakers and buys pillows. which of the following pairs of vendors has a double coincidence of wants?

Question 9 of 10 2 points suppose your sat score is 1770. you look up the average sat scores for students admitted to your preferred colleges and find the list of scores below. based on your sat score of 1770, which average score below represents the college that would be your best option? o a. 1790 o b. 2130 o c. 2210 od. 1350

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables

Which of the following vectors are orthogonal to (2,1)? check all that apply