document.write( "Question 459666: 1. Estimate the value of the square root:0.85\r
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document.write( "2.Write -4 x y x y x y using exponents \n" );
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Algebra.Com's Answer #315217 by Edwin McCravy(20056)![]() ![]() You can put this solution on YOUR website! 1. Estimate the value of the square root:0.85 \n" ); document.write( " \r\n" ); document.write( "To estimate the square root of 0.85, we know that the\r\n" ); document.write( "square root of 81 is 9 and therefore the square root\r\n" ); document.write( "of 0.81 is 0.9. So we begin with 0.9 \r\n" ); document.write( "\r\n" ); document.write( "Now we subtract the last digit of 0.81, which is 1,\r\n" ); document.write( "from the last digit of 0.85, which is 5, and get 4,\r\n" ); document.write( "then we take half of 4 and get 2.\r\n" ); document.write( "\r\n" ); document.write( "Then we put 2 on the end of 0.9 and get 0.92. That's\r\n" ); document.write( "the estimation.\r\n" ); document.write( "\r\n" ); document.write( "By the calculator we get 0.9219544457 so 0.92 is\r\n" ); document.write( "a very good approximation.\r\n" ); document.write( "\r\n" ); document.write( "-----------------------------------\r\n" ); document.write( " \n" ); document.write( "2.Write -4 x y x y x y using exponents \n" ); document.write( " \r\n" ); document.write( "Count the x's to be multiplied. There are 3 of them,\r\n" ); document.write( "so that's x³\r\n" ); document.write( "\r\n" ); document.write( "Count the y's to be multiplied. There are 3 of them\r\n" ); document.write( "also, so that's y³. So we write\r\n" ); document.write( "\r\n" ); document.write( "-4x³y³\r\n" ); document.write( "\r\n" ); document.write( "Edwin\n" ); document.write( " |