document.write( "Question 550610: calculating hang time. find the hangtime for a golfball hit 80 feet into the air? I have t + 80 so far \n" ); document.write( "

Algebra.Com's Answer #358949 by richard1234(7193) $\"\"$ $\"About$

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t+80 has nothing to do with anything. In fact, t is a time and 80 is a distance, so you can't add them.\r
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(assume x_0 = 0) where g is approximately -32 ft/s^2.\r
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\n" ); document.write( "\n" ); document.write( "You want to find the value of t such that (t,80) is the vertex of a quadratic polynomial. This occurs when t = -v0/g (recall that the vertex of a polynomial in the form ax^2 + bx + c occurs at x = -b/2a). Replace t with this expression, solve for v0, then find t.\r
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