document.write( "Question 1205874: A ball is thrown from the top of a building from a height of 75 feet
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document.write( "above the ground. The height of the ball, H, in feet from the
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document.write( "ground, and time, t, in seconds, can be modeled by the equation
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document.write( "H = −5(t−3)(t+5).
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document.write( "Select the true statement.
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document.write( "Ⓐ The ball reaches the ground in 3 seconds.
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document.write( "Ⓑ The ball reaches the ground in 5 seconds.
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document.write( "Ⓒ The ball reaches the ground in 15 seconds.
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document.write( "Ⓓ The ball reaches the ground in 25 seconds. \n" );
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Algebra.Com's Answer #842946 by ikleyn(52776)![]() ![]() You can put this solution on YOUR website! .\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "This equation in your post for height, H(t) = -5(*-3)*(t+5), does not work in feet,\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "because its leading coefficient at t^2 is -5 ft/s^2.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "A correct equation for height in feet has the leading coefficient -16 ft/s^2 at t^2.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "When a person comes and claims that the height equation for a projectile has the form as it is written in your post, \n" ); document.write( "it becomes clear that this person does not know the basics of Physics (kinematics), as well as the relevant part of Algebra.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |