Each Saturday, a store reduces the price of any unsold item by
10%. If an item was priced at $80, on Saturday of the first week it
is marked down to $72. At the end of the second week, it drops
to $64.80, and at the end of the third week the price is decreased
to $58.32. If this continues for 10 weeks, what should be the
selling price for an item that was originally priced at $80?

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.