document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=158736>Question 158736</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 2.	Biologists want to set up a station to test alligators in the lake for West Nile Virus. Suppose that the costs for such a station are $2,500 for setup costs and $3.00 to administer each test. \r<BR>\n" );
document.write( "\n" );
document.write( "a.	Write an expression that gives the total cost to test x animals.\r<BR>\n" );
document.write( "\n" );
document.write( "b.	You can find the average cost per animal by dividing total costs by number of animals. Write the expression that gives the average cost per animal.\r<BR>\n" );
document.write( "\n" );
document.write( "c.	Find the average cost per animal for 10 animals. 100 animals. 1,000 animals.<BR>\n" );
document.write( "d.	As the number of animals tested increases, what happens to the average cost to test the animals? Would the average cost ever fall below $3.00? If so, identify a value that supports your answer. If not, explain how you know. \r<BR>\n" );
document.write( "\n" );
document.write( "e.	How many animals should be tested for the average cost to be $5.00 per animal? <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #203349 by </B><A HREF=/tutors/aboutme.mpl?userid=yourtutorssuck><B>yourtutorssuck(1)</B></A><img src=\"/images/stars/iconNewId_16x16.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=yourtutorssuck><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=203349\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 2.	Biologists want to set up a station to test alligators in the lake for West Nile Virus. Suppose that the costs for such a station are $2,500 for setup costs and $3.00 to administer each test. \r<BR>\n" );
document.write( "\n" );
document.write( "a.	Write an expression that gives the total cost to test x animals.\r<BR>\n" );
document.write( "\n" );
document.write( "3x+2500\r<BR>\n" );
document.write( "\n" );
document.write( "b.	You can find the average cost per animal by dividing total costs by number of animals. Write the expression that gives the average cost per animal.\r<BR>\n" );
document.write( "\n" );
document.write( "3x+2500 / x\r<BR>\n" );
document.write( "\n" );
document.write( "c.	Find the average cost per animal for 10 animals. 100 animals. 1,000 animals.\r<BR>\n" );
document.write( "\n" );
document.write( "3(10)+2500/10 = 30+2500/10= 2530/10=$253<BR>\n" );
document.write( "3(100)+2500/100 = 300+2500/100 = 2800/10=$28<BR>\n" );
document.write( "3(1000)+2500 / 1000 = 3000+2500 / 1000= 5500 / 1000 = $5.50\r<BR>\n" );
document.write( "\n" );
document.write( "d.	As the number of animals tested increases, what happens to the average cost to test the animals? Would the average cost ever fall below $3.00? If so, identify a value that supports your answer. If not, explain how you know. \r<BR>\n" );
document.write( "\n" );
document.write( "no\r<BR>\n" );
document.write( "\n" );
document.write( "e.	How many animals should be tested for the average cost to be $5.00 per animal? \r<BR>\n" );
document.write( "\n" );
document.write( "5=3x+2500/x<BR>\n" );
document.write( "first multiply by the denominator on both sides.<BR>\n" );
document.write( "5x=3x+2500<BR>\n" );
document.write( "now solve.<BR>\n" );
document.write( "2x=2500<BR>\n" );
document.write( "x=1250 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );