document.write( "Question 1183035: Weather balloons are filled with hydrogen and released at various sites to measure and transmit data about conditions such as air pressure and temperature. A weather balloon is filled with hydrogen at the rate of 0.5 ft3/s. Initially, the balloon has 4 ft3 of hydrogen.
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Algebra.Com's Answer #813182 by ikleyn(52776) $\"\"$ $\"About$

You can put this solution on YOUR website!
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document.write( "(a)  Write the function as you read the problem\r\n" );
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document.write( "         V(t) = 4 + 0.5*t  cubic feet,\r\n" );
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document.write( "     where \"t\" is the time in seconds from the starting moment.\r\n" );
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document.write( "     Each second, the volume increases by 0.5 cubic feet.\r\n" );
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document.write( "(b)  To answer this question, you solve the equation\r\n" );
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document.write( "         V(t) = 21 ft^3,   \r\n" );
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document.write( "     or\r\n" );
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document.write( "        4 + 0.5*t = 21.\r\n" );
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document.write( "     The solution is   t =  =  = 34 seconds.    ANSWER\r\n" );
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