February 23, 2012 math 130 exam 1 (21-4 & 3. 1-4) You must show all appropriate algebra work in order to receive full credit for an answer: before handing in your test: on your first answer sheet only, please copy the pledge and sign. Answers should be exact and in simplest form unless otherwise indicated. Please answer question 1 on answer page 1. Your answer should be in the form kxe. 1. b. (7 points) suppose ln(x) = 5 and ln(y) = 2. Use logarithm properties to simplify and evaluate ln y. Find the exact value of the decay constant then use it to write the exponential decay equation for. 1. d. (7 points) use your equation from 1. c. i to answer the following question: if you start with 18 grams of. Give both an exact answer in simplest form and a decimal approximation to the nearest hundredth.
