document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1183721>Question 1183721</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 𝑓(𝑥) = {2, if 0 ≤ 𝑥 ≤ 5<BR>\n" );
document.write( "-------{𝑥 + 𝑏, 𝑖f 5 < 𝑥 < 20\r<BR>\n" );
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document.write( "a)Deduce the value of 𝑏 so that 𝑓 (𝑥) is continuous at 𝑥 = 5.<BR>\n" );
document.write( "Answer: b=-3 \r<BR>\n" );
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document.write( "b)Find the volume of this solid of revolution.<BR>\n" );
document.write( "c)Calculate the area of the generated surface. </SPAN>\n" );
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document.write( "For parts b) and c), you need to specify the axis of revolution for the graph.<br><BR>\n" );
document.write( "Presumably, since you specify 5 < x < 20, the revolution is about a horizontal axis.  But it could equally well be y=2 or y=0.<br><BR>\n" );
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