IAT SOLUTIONS - C_7.pdf

Chapter 7, continued12. A 5 P 1 1 1 r } n 2 nt , A 5 6000, P 5 5000, r 5 0.03, andn 5 4y 5 500011 1 }0.034 2 4xX Y15.8 5946.45.9 5964.26 5982.16.1 60006.2 6017.96.3 6035.96.4 6054X=6.1IntersectionX=6.100147 Y=60004. 263(0.96) x < 227X Y120.73 -27.0320.74 -27.0220.75 -27.0120.76 -2720.77 -26.9820.78 -26.9720.79 -26.96X=20.76The solution is x < 20.765. 95(1.6) x ≤ 1620IntersectionX=20.755915Y=-27The balance will reach $6000 after about 6.1 years.0.1226x 2 7.82813. y 5 1.0245 2 eX Y1-2 1.0242-1 1.02410 1.02411 1.0242 1.0243 1.02394 1.0238X=0IntersectionX=.03225112 Y=1.0241Deep water in the South Atlantic Ocean off Antarcticahas a temperature of about 0.038C.7.6 Extension (p. 527)1. 3 x ≤ 20X Y12.68 18.9972.69 19.2072.7 19.4192.71 19.6342.72 19.852.73 20.072.74 20.291X=2.72IntersectionX=2.726833 Y=20X Y16 1593.86.01 1601.36.02 1608.96.03 1616.56.04 1624.16.05 1631.76.06 1639.4X=6.03The solution is x ≤ 6.03.6. 22841 }9 72 x > 2135X Y1-2.98 -134.3-2.97 -134.6-2.96 -135-2.95 -135.3-2.94 -135.7-2.93 -136-2.92 -136.3X=-2.96The solution is x < 22.96.7. log 3x ≥ 3IntersectionX=6.0346439 Y=1620IntersectionX=-2.959239Y=-135Copyright © by McDougal Littell, a division of Houghton Mifflin Company.The solution is x ≤ 2.727.2. 281 }2 32 x > 9X Y12.75 9.18142.76 9.14422.77 9.10722.78 9.07042.79 9.03372.8 8.99712.81 8.9607X=2.79The solution is x < 2.799.3. 244(0.35) x ≥ 50X Y11.48 51.5951.49 51.0571.5 50.5231.51 49.9961.52 49.4741.53 48.9571.54 48.446X=1.51The solution is x ≤ 1.51.IntersectionX=2.7992049 Y=9IntersectionX=1.5099179 Y=50X Y125 2.929926 2.965627 - 328 3.033129 3.06530 3.095931 3.1257X=27The solution is x ≥ 27.8. log 5x < 2X Y121 1.891722 1.920623 1.948224 1.974625 226 2.024427 2.0478X=25The solution is 0 < x < 25.9. log 6x 1 9 ≤ 11X Y132 10.93433 10.95134 10.96835 10.98436 1137 11.01538 11.03X=36IntersectionX=27 Y=3IntersectionX=25 Y=2IntersectionX=36 Y=11The solution is 0 < x ≤ 36.Algebra 2Worked-Out Solution Key449