The Best Base

• Depreciation (HW)
   
• Absolute vs. relative growth rate (CD)
   
• More on population growth (birth rate – death rate = growth rate; CD)
   
• A Basis for Disguise (changing bases; 3⁴ = 81; 81^? = 3; 7 = 5^?; 5 = 7^?; 7^x = 5^?; approximations, calculators; SG)
   
• Curve fitting by substitution (CD)
   
• California population growth (model by exponential function; HW)
   
• Find the base (f^'(b^x) = b^x; SG)
   
• Doubling and quadrupling time (HW)
   
• Compound interest (SG)
   
• e as limit of (1 + 1/x)^x
   
• f^'(e^x) = ?
   
• ln, log, e^x on the calculator