1.)simplify the expression: 4 times start root 18 end root plus 5 times start root 32 end root 2.)simplify the expression: 7 times start root 5 end root minus 3 times start root 80 end root 3.)simplify the expression: start root 21 end root times left parenthesis start root 3 end root plus start root 14 end root right parenthesis. 4.)simplify by rationalizing the denominator: start fraction 4 over start root 10 end root minus start root 6 end root end fraction i will make you the brainiest!

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.

List x1, x2, x3, x4 where xi is the midpoint endpoint of the five equal intervals used to estimate the area under the curve of f(x) between x = 0 and x = 10.

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