In survey conducted by quinnipiac university from october 25-31, 2011, 47% of a sample of 2,294 registered voters approved of the job barack obama was doing as president. what is the 99% confidence interval for the proportion of all registered voters who approved of the job barack obama was doing as president? (0.443, 0.497) correct. we can be 99% confident that the proportion of all registered voters who approved of the job barack obama was doing as president is between 0.443 and 0.497. (0.460, 0.480) (0.453, 0.487) (0.450, 0.490)

Martha has a deck of cards. she has lost some of the cards, and now the deck only contains nine spades, eleven diamonds, eight clubs, and twelve hearts. martha predicts that whenever she draws a card from the deck without looking, she will draw a club one-fifth of the time. which activity would best allow martha to test her prediction? a. randomly draw a card from the box and see if it is a club. b. randomly draw a card. then, continue to draw another card until all eight clubs are drawn. c. randomly draw and replace a card 120 times. then, observe how close to 30 times a club is drawn. d. randomly draw and replace a card 100 times. then, observe how close to 20 times a club is drawn.

Select the two pairs of figures that are similar.

y=2x−1 5x−4y=1 is (1,1)(1,1) a solution of the system?