I really need help! If the world has 2120 billion barrels of oil now and decreases 23 billion barrels a year And the slope-intercept form equation is R=-23t + 2120. (t being how many years) How many years will it take to use it all up? You also need to would do the nearest 2 decimal places

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

Write an inequality and solve each problem.for exercises 11 and 12, interpret the solution.

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.