document.write( "Question 914718: I have a test tomorrow and for some reason i just can't understand these problems!! Please help! \r
\n" ); document.write( "\n" ); document.write( "A car is moving at a rate of 28 miles per hour, and the diameter of its wheel is about 2 1/3 feet.
\n" ); document.write( "A.) find the number of revolutions per minute the wheels are rotating.
\n" ); document.write( "B.) find the angular speed of the wheels in radians per minute.\r
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Algebra.Com's Answer #555265 by LinnW(1048)\"\" \"About 
You can put this solution on YOUR website!
A.) find the number of revolutions per minute the wheels are rotating.
\n" ); document.write( "For this question, convert miles per hour feet per minute.
\n" ); document.write( "SO \"28+miles%2F+Hour\" = \"%2828%285280%29+feet%29%2F+%2860+minutes%29\"
\n" ); document.write( "= \"%28147840+feet%29%2F+%2860+minutes%29\"
\n" ); document.write( "\"%282464+ft%29+%2F+minute\"
\n" ); document.write( "If we divide 2464 by 2 1/3 we will have the number of revolutions.
\n" ); document.write( "2464 by (2 1/3) = \"2426%2F%287%2F3%29\"
\n" ); document.write( "\"2426%2A%283%2F7%29\"
\n" ); document.write( "7278/7 = 1039.71 revolutions
\n" ); document.write( "One revolution per minute = 6.283 radians per minute
\n" ); document.write( "So 1039.71*6.283 = 6532.5 radians per minute
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