Ella Vader (Darth's other daughter) rides a Ferris wheel. As the wheel turns, her distance, y, from the ground, measured in feet, varies sinusodially with time, t, measured in seconds, according to the equation

Fatima plans to spend at least $15 and at most $20 dollars on sketch pads and pencils. if she buys 2 sketchpads, how many pemcils can she buy while staying in her price range? fatima can buy between and pencils. ? (type whole numbers. use ascending? order.)