document.write( "Question 650148: I need help with a Precalculus problem:\r
\n" ); document.write( "\n" ); document.write( "The weight, W, of an object varies inversely as the square of the distance, d, from the center of the earth. At sea level (3978 mi from the center of the earth), an astronaut weighs 220 lb. Find their weight when they are orbiting 400 mi above sea level. \n" ); document.write( "

Algebra.Com's Answer #407256 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"+W+=+k%2A%281%2Fd%29+\"$
\n" ); document.write( " $\"+k+\"$ is called the constant of proportionality
\n" ); document.write( "given:
\n" ); document.write( " $\"+W+=+220+\"$ pounds
\n" ); document.write( " $\"+d+=+3978+\"$ mi
\n" ); document.write( " $\"+220+=+k%2A%28+1%2F3978+%29+\"$
\n" ); document.write( " $\"+k+=+220%2A3978+\"$
\n" ); document.write( " $\"+k+=+875160+\"$
\n" ); document.write( "---------------
\n" ); document.write( " $\"+W+=+875160%2A%281%2F%28+3978+%2B+400+%29%29+\"$
\n" ); document.write( " $\"+W+=+875160+%2F+4378+\"$
\n" ); document.write( " $\"+W+=+199.8995+\"$
\n" ); document.write( "The astronaut weighs about 200 pounds
\n" ); document.write( " \n" ); document.write( "

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