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Exam 1 Practice 1

# Exam 1 Practice 1 - M ATH 1 27 M IDTERM 1 2 0 O ctober 2...

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MATH 127 MIDTERM #1 20 October 2005 SPECIAL CODE: 102005 p.2of 6 1. If f(x):2x2+x-2 then f(2) is ^ ) z b ) 4 The line with equation slope, y-intercept and a) 2,12 andl2 d) -l/2, -3 and -6 a) Qoe 02' Ifthe function a) Po:37 and d) Po: 9.5 and c) -2 d ) 0 e ) 4 2. 4 y + 2 x + 1 2 : 0 h a s x-intercepf in that order, equal to: b) -2,3 and -6 e) 2,4 and 2 b) 100 (1.2)t c) 100 (0.8)t d) 20 (0.8)' e) r00 (1.2) ' P(t) : 37 (0.95)t is rewritten as P(t) : Poek', then the values of Pe and k are: k:0.051 b) Po = 37 and k: -0.051 c) Po:95 and k = 0.05 k: -1.051 e) Po :37 and k: .95 c\ ll2, -3 and 6 3. Theaveragerateofchangeof f(x):2ln(x) between x:land x:2 (roundedto2decimals)is: a) 1.33 b) r.77 c) 7.27 d) 0.69 e) 1.39 4. A coffee shopsells cups ofcoffee for \$1.50 each. Suppose the fixed cost is \$10,000 and the variable cost is \$0.10 per cup. The number of cupssold at the break even point is closest to: A f 00 mg dose of a certain drug is metabolized by the body in a manner so that 20"h of the remaining amountof the drug is eliminated eachhour. Which of the following formulas bestdescribes the amount of the drug remaining in the body after t hours? 7. \$2000is invested in an account where 4oh annual interest is compounded continuously. The number of yearsrequired for the value of this account to reach \$10,000 is closest to: PDF Creator - PDF4Free v2.0 http://www.

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