garcialopez162017
06.12.2019 •
Mathematics
An astronaut on the moon throw the baseball upward. the astronaut is 6’6” tall, and the initial velocity of the ball is 40 ft./s. the height s of the ball in feet is given by the equation s equals -2.7t^2+40t+6.5, where t is the number of seconds after the ball was thrown how many seconds is the ball 18 feet above the moon surface?
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