Math120 f07 test3

Math120 f07 test3 - 1. 2. t - h N : l The following foreign...

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Unformatted text preview: 1. 2. t - h N : l The following foreign exchange rates were printed in the newspaper, where 1; denotes US dollars, J denotes Jodanian diners, and M denotes German mark . _d.l_ = 9.11.! __CLM_ = 1.03M. d$ 1$ d$ 1$ Compute the following ratios and express them in "propeyform. Z) a) d$/dJ = EH 7 ’ 6/00 b) dM/dJ c) dJ/dM ll d) Write out the correct equation (e.g. y = mx) for changing marks to dinars,i.e., the equation for how many dinars you get for so many marks. \ Consider the function f(x) = (x - 2)(x2 - x - 2) + 1 on the interval [0, 5]. Find the coordinates (x, f(x)) of the point where fog) assumes (\l ’ my,“ “H. 2 [f a) its maximumon [0, 5], \_' ’l' ti; * l ,1“ All y ) l O (Q ., b) its minimum on [06 M's limits u I “' ‘\. - hi 4,. For each function f(><), calculate f’(x) and f "(x) and simplify. Then, for each number x = a, calculate f(a), f’(a), and f "(a), l.e., the three fan‘s. Finally, graph the point (a,f(a)), the tangent line at (a,f(a)), and the graph of f(x) (from the three facts). 3. f(x) = e(2>< — 4) and a = (2). 4 , a} 2X" 5?}: e2“ “.2 X? ‘ Q '2 r m l:'”¥.?'-i)"l) 1(2)” Eéi . A, L @ a) . W . = Z , 7‘: f(x)=x4—4x2+2x and azl. ’2 . $1fi4x3_ gm: \ZX axe) 5. Elasticity of Demand. A video club has estimated that the demand equation for the rental of tapes is given by 45; ab: r(p) = 104/40 «p12 -.-. 3419):. l0'(‘I'0-"1°)J where p is the price, $0 < p < $6.25, and %_is rentals per week. Currenth the rental Price is $2. ‘ Q m: 40' (z 1. f(2) = .1: 3— (2-). 5. Is the demand elastic, unitary, pr inelastic at this price? amt-(Md 6. If the rental price is increased by 4. 51, what will probany be the Change in the number of rentals 1E'er week? “ “EN 09 ...
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This test prep was uploaded on 02/15/2008 for the course MATH 120 taught by Professor Staff during the Fall '06 term at UCSD.

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Math120 f07 test3 - 1. 2. t - h N : l The following foreign...

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