If the amplitude of a large quake is 1,000 times greater than the amplitude of a smaller quake, what is the difference in
their magnitudes on the Richter scale? Use the following formula to find the difference, where M, and Ms represent the
magnitudes of the larger and smaller quakes, respectively, and A, and As represent the amplitudes of the larger and
smaller quakes, respectively.

David is spreading mulch on a triangular area of his flower bed. the coordinates of the vertices of the area are (1, 3), (9, 3), and (4, 6). what is the area of the triangle if each square has an area of 3 square feet?

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.

Find the zeros of each function. f(x) = 6x^2 - 7x - 20