document.write( "Question 1123206: The cost of running a ship at a constant speed of v km/h is 160 + 1/100* v^3 dollars per hour.
\n" ); document.write( "a) find the cost of a journey of 1000 km at a speed of 10km/h.
\n" ); document.write( "b) find the cost, C dollars, of a journey of 1000km at a speed of v km/h. \n" ); document.write( "
Algebra.Com's Answer #739488 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
I will say \"+c+\" = rate of spending in dollars/hr
\n" ); document.write( "Also \"+C+\" = spending in dollars
\n" ); document.write( "Also,
\n" ); document.write( "\"+c+=+160+%2B+%281%2F100%29%2A1000+\"
\n" ); document.write( "\"+c+=+170+\"
\n" ); document.write( "———————-
\n" ); document.write( "[ time in hrs ] = [ km ] / [ km/hr ]
\n" ); document.write( "[ cost in dollars ] = [ dollars/hr ]x[ hrs ]
\n" ); document.write( "———————-
\n" ); document.write( "a)
\n" ); document.write( "\"+C+=+c%2At+\"
\n" ); document.write( "\"+t+=+1000%2F10+\"
\n" ); document.write( "\"+t+=+100+\" hrs
\n" ); document.write( "\"+C+=+170%2A100+\"
\n" ); document.write( "\"+C+=+17000+\"
\n" ); document.write( "$17,000
\n" ); document.write( "————————-
\n" ); document.write( "b)
\n" ); document.write( "\"+t+=+1000%2Fv+\"
\n" ); document.write( "\"+c+=+160+%2B+%281%2F100%29%2Av%5E3+\"
\n" ); document.write( "\"+C+=+%28+160+%2B+%281%2F1000%29%2Av%5E3+%29%2A%28+1000+%2Fv+%29+\"
\n" ); document.write( "\"+C+=+160000+%2Fv+%2B+v%5E2+\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
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