Wei is standing in wavy water and notices the depth of the waves varies in a periodic way that can be modeled by a trigonometric function. He starts a stopwatch to time the waves.
After 1.1 seconds, and then again every 3 seconds, the water just touches his knees. Between peaks, the
water recedes to his ankles. Wei's ankles are 12 cm off the ocean floor, and his knees are 55 cm off the
ocean floor
Find the formula of the trigonometric function that models the depth D of the water t seconds after Wei
starts the stopwatch. Define the function using radians.
D(t) =
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Sasha drank 8 bottles of water everyday for a week. how many bottles of water did she drink in total?

Which of the following describes the symmetry of the graph of y = x3?

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.