The temperature of boiling water decreases as it is removed from a hot stove according to the equation T=-71m+212, where [T] is the temperature of the water and [m] is the number of minutes since the water was taken off the stove. What is the rate of change in this problem?

temperature goes down 71 LaTeX: ^\circ per second

temperature goes down 71LaTeX: ^\circ per hour

temperature goes down 71LaTeX: ^\circ per minute

temperature goes up 71LaTeX: ^\circ per minute

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.