High-density lipoprotein (HDL) cholesterol is some-times referred to as the "good" cholesterol. A sample of 13 female volunteers had their HDL cholesterol levels measured (in mgydL), giving
the following data: 58 60 48 55 56 46 54 50 49 51 53 54 53. Assume that the data come from a
normal distribution. Do the data suggest that the population mean cholesterol level is 50
mgydL?

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.

*let m∠cob = 50°30’, m∠aob = 70° and m∠aoc = 20°30’. could point c be in the interior of ∠aob? why?

Which equation is y = -6x2 + 3x + 2 rewritten in vertex form?