In a survey sample of 83 respondents, about 30.1 percentof the sample work less than 40 hours per week. calculate a 68 percent confidence interval for the proportion of persons who work less than 40 hours per week.

Select the correct answer from the drop-down menu. subtracting 3xy^2 from 8xy^2 gives the same result as the expression. [tex]3xy ^{2} - 8xy ^{2} [/tex][tex] { - 7xy}^{2} - {2xy}^{2} [/tex][tex] {7xy}^{2} - {2xy}^{2} [/tex]

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

Donald has x twenty-dollar bills and 11 ten-dollar bill. how much money does donald have? write your answer as an expression.