document.write( "Question 122206: for a bakery the cost of making each day's batch of doughnuts is given by the equation below, where C is the total cost in dollars of making a batch of doughnuts and N is the number of doughnuts in the batch.\r
\n" ); document.write( "\n" ); document.write( "C=30+0.1N\r
\n" ); document.write( "\n" ); document.write( "If the number of doughnuts in a batch is increased by 20 dougnuts, by how much will the cost of the batch increse? \n" ); document.write( "
Algebra.Com's Answer #89704 by rajagopalan(174)\"\" \"About 
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cost of making each day's batch of N doughnuts=C=30+0.1N
\n" ); document.write( "cost of making each day's batch of N+20 doughnuts=C=30+0.1(N+20)
\n" ); document.write( "Increase in cost ( step2-step1=30+0.1(N+20) minus 30+0.1N
\n" ); document.write( "=30+0.1N+(0.1*20)-30-0.1*N
\n" ); document.write( "=30+0.1N+2-30-0.1N
\n" ); document.write( "30and -30 cancel
\n" ); document.write( "0.1N and -0.1N cancel
\n" ); document.write( "Leaving 2 as remainder\r
\n" ); document.write( "\n" ); document.write( "So Additional cost =2 Dollars
\n" ); document.write( "The batch cost will increase by only 2 dollars
\n" ); document.write( "okay
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