Unit 5 Lesson 2 Homework Answer Key - rogowiczprecalc - …€¦ · · 2014-12-094000 5000 6000...
Transcript of Unit 5 Lesson 2 Homework Answer Key - rogowiczprecalc - …€¦ · · 2014-12-094000 5000 6000...
Unit 5 Lesson 2 Homework Pg 296-‐297 #(1, 3, 7, 19-‐21, 31, 34, 39)
1. Growth
9% increase
3. Decay 3.2%
7. ! = 5(1.17)!; where x is in year. 19. !(!) = 2.3(1.25)! 20. ! ! = −5.8(0.8)! 21.
8.05 = 4(!)! 2.0125 = (!)! 2.0125! = (!)!! ! = 1.15
! = 4(1.15)! 31. a.)
!(!) = 6250(1.0275)!
1930 -‐ ! 20 = 6250 1.0275 !" = 10,752 people
1940 -‐ ! 30 = 6250 1.0275 !" = 14,103 people
31. b.)
6250 1.0275 ! = 20,000
t = 42.855 in 1953 the population will reach 20,000.
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 1001000
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90001!1041.1!1041.2!1041.3!1041.4!1041.5!1041.6!1041.7!1041.8!1041.9!1042!1042.1!1042.2!1042.3!1042.4!1042.5!104
(42.855,20000)
Years Population xmin: 0 ymin: 0 xmax: 100 ymax: 25,000
34. 1 = 3.5(0.5)!/!"
x = 117.48 in about 118 days
0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 3600.1
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(117.84,1)
Days Grams xmin: 0 ymin: 0 xmax: 365 ymax: 2
39.
200 = 100(!)!.!"#!
x = 1 in about 1 hour
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 2410
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(1,200)
Hours Bacteria xmin: 0 ymin: 0 xmax: 24 ymax: 250