document.write( "Question 1156441: The height of a projectile fired upward from the ground with a velocity of 128 feet per second is given by the formula: h=-16t squared + 128t.\r
\n" ); document.write( "\n" ); document.write( "a. When will the projectile be 256 feet above the ground?\r
\n" ); document.write( "\n" ); document.write( "b. Will the projectile ever be 300 feet above the ground? Explain.\r
\n" ); document.write( "\n" ); document.write( "c. When will the projectile be 240 feet above the ground?\r
\n" ); document.write( "\n" ); document.write( "d. In how many seconds will the projectile hit the ground? \n" ); document.write( "
Algebra.Com's Answer #779139 by ikleyn(52803)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "            The last part d) in the post by @MathLover1 should be corrected.\r
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document.write( "-16*t^2 + 128t = 0\r\n" );
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document.write( "16t*(t-8) = 0\r\n" );
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document.write( "t = 0  is not the solution.\r\n" );
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document.write( "t = 8   is the ANSWER.\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solved (correctly).\r
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\n" ); document.write( "\n" ); document.write( "In this site,  there is a bunch of lessons on a projectile thrown/shot/launched vertically up\r
\n" ); document.write( "\n" ); document.write( "    - Problem on a projectile moving vertically up and down\r
\n" ); document.write( "\n" ); document.write( "    - Problem on an arrow shot vertically upward\r
\n" ); document.write( "\n" ); document.write( "    - Problem on a ball thrown vertically up from the top of a tower \r
\n" ); document.write( "\n" ); document.write( "    - Problem on a toy rocket launched vertically up from a tall platform\r
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\n" ); document.write( "\n" ); document.write( "Consider these lessons as your textbook,  handbook,  tutorials and  (free of charge)  home teacher.
\n" ); document.write( "Read them attentively and learn how to solve this type of problems once and for all.\r
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\n" ); document.write( "\n" ); document.write( "Also,  you have this free of charge online textbook in ALGEBRA-I in this site\r
\n" ); document.write( "\n" ); document.write( "    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.\r
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\n" ); document.write( "\n" ); document.write( "The referred lessons are the part of this textbook under the topic \"Projectiles launched/thrown and moving vertically up and dawn\".\r
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\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Save the link to this online textbook together with its description\r
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\n" ); document.write( "\n" ); document.write( "Free of charge online textbook in ALGEBRA-I
\n" ); document.write( "https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson\r
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\n" ); document.write( "\n" ); document.write( "to your archive and use it when it is needed.\r
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