A ball is thrown vertically upward with an initial velocity of 80 feet per second. The distance s (in feet) of the ball from the ground after t seconds is s=80t−16t2. (a) At what time t will the ball strike the ground? (b) For what time t is the ball more than 84 feet above the ground?
A ball is thrown vertically upward with an initial velocity of 80 feet per second. The distance s (in feet) of the ball from the ground after t seconds is s=80t−16t2. (a) At what time t will the ball strike the ground? (b) For what time t is the ball more than 84 feet above the ground?
Chapter6: Exponential And Logarithmic Functions
Section6.1: Exponential Functions
Problem 60SE: The formula for the amount A in an investmentaccount with a nominal interest rate r at any timet is...
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A ball is thrown vertically upward with an initial velocity of
80
feet per second. The distance s (in feet) of the ball from the ground after t seconds is
s=80t−16t2.
(a) At what time t will the ball strike the ground?
(b) For what time t is the ball more than
84
feet above the ground? |
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