Unit 5 Lesson 2 Homework Answer Key - rogowiczprecalc - …€¦ ·  · 2014-12-094000 5000 6000...

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Unit 5 Lesson 2 Homework Pg 296297 #(1, 3, 7, 1921, 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

Transcript of Unit 5 Lesson 2 Homework Answer Key - rogowiczprecalc - …€¦ ·  · 2014-12-094000 5000 6000...

Page 1: Unit 5 Lesson 2 Homework Answer Key - rogowiczprecalc - …€¦ ·  · 2014-12-094000 5000 6000 7000 8000 9000 1!104 1.1!104 1.2!10 4 1.3!104 1.4!10 4 1.5!10 4 1.6!104 1.7!104 ...

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    

                               

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 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  

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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  

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 39.    

200 = 100(!)!.!"#!    

x  =  1  in  about  1  hour    

   

 

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(1,200)

Hours     Bacteria        xmin:  0     ymin:  0    xmax:  24   ymax:  250