Question: hi tutor help me with this handwritten solution complete please thanks including graphs subject: calculus Find the volume of the solid that results when the



hi tutor help me with this handwritten solution complete please thanks including graphs subject: calculus



Find the volume of the solid that results when the region under the curve y = 1 +23 between a = 1 and r = 2 is revolved about (a) the r-axis; and (b) the y-axis. Use the method of cylindrical shells to find the volume of the solid generated by revolving about the y-axis the region bounded by the graph of y = 2x - 12 and the r-axis. Sketch the region. Forty five percent of a radioactive substance disappears in 20 years. Find the half-life of the substance. (The half-life of a substance is the time for half of it to decay)
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