document.write( "Question 862633: An arrow is shot vertically upward from a platform 10 ft high at a rate of 185 ft per sec. When will the arrow hit the ground? Use the formula: h=16t^2+vt+h. (round off answer to the nearest tenth. Find seconds. \n" ); document.write( "

Algebra.Com's Answer #519771 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( "h= -16t^2+185t+10, h = 0 when it hits the ground
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document.write( " 16t^2+185t+10 = 0
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document.write( "t = 11.6sec (to nearest tenth)
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document.write( "Solved by pluggable solver: SOLVE quadratic equation with variable
Quadratic equation  (in our case ) has the following solutons:
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document.write( "  For these solutions to exist, the discriminant  should not be a negative number.
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document.write( "  First, we need to compute the discriminant : .
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document.write( "  Discriminant d=34865 is greater than zero. That means that there are two solutions: .
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document.write( "    Quadratic expression  can be factored:
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document.write( "  Again, the answer is: -0.0538036897701293, 11.6163036897701.\n" );
document.write( "Here's your graph:
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