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Unformatted text preview: Name : Section : UFID: Show all of your work to receive credit. Please use a pen with blue or black ink. When you are nished, FOLD your paper in half lengthwise and write your name on the back. MAC1140, Quiz 18 1. Simplify: log3 (a) 5 (b) 3 (c) 1 32 9-1/2 2. Given that log e 0.4, evaluatelog100 e4 . (a) 0.4 (b) 0.8 (c) 1.2 3. The radioactive decay of an element is given by the model: y = a0 e-.07t . Find the half-life of the element.
ln 2 .07 .07 (b) ln 2 (c) (.07) ln 2 (a) (d) Not enough information 4. Express as a single logarithm with no coecient: (a) ln
xz 2 y3 z 2 x1/3 y 1 3 ln x - 3 ln y +2 ln z (b) ln(yz 2 x1/3 ) (c) ln 5. Find the domain of log ex-3 - 2) (a) (-, ) (b) x > 3 + ln 2 (c) x > 3 - ln 2 ...
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