Algebra and Trigonometry (6th Edition)
Algebra and Trigonometry (6th Edition)
6th Edition
ISBN: 9780134463216
Author: Robert F. Blitzer
Publisher: PEARSON
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I need help with questions 1-6

al Decay
been used
ccounts of
had a
bunt after
l decay
ar 0.008
account
loss
,
ne
9.
Practice
S
Example 1
exponential function for a graph that passes through the points.
Write an
1. (2,16) and (3, 32)
2. (1, 1) and (3, 0.25)
4. (-2, 4) and (1, 0.5)
Example 2
Write an exponential function for the graph.
7.
10
-2
4
31
4-3-2-10
S
3
85
-3
1
y
Name:
1 2 3 4 x
1 2 3 4x
5. (1, 12) and (3, 192)
8.
Go Online You can complete your homework online,
10.
4
3
2
1Q
y
4
4
3
2
1
-4-3-2-10
P
-3
3. (2, 90) and (4, 810)
6. (1, 18) and (3, 72)
2 3 4x
AX
Example 3
11. BIOLOGY A certain species of bacteria in a laboratory culture begins with 50 cells
and doubles in number every 30 minutes. Write a function to model the situation.
12. DEPRECIATION Amrita bought a new delivery van for $32,500. The value of this
van depreciates at a rate of 12% each year. Write a function to model the value of
the van after x years of ownership.
13. COMMUNICATION Cell phone usage grew about 23% each year from 2010 to
2016. If cell phone usage in 2010 was 43 million, write a function to model U.S. cell
phone usage over that time period.
Lesson 8-3 Writing Exponential Functions 457
R
expand button
Transcribed Image Text:al Decay been used ccounts of had a bunt after l decay ar 0.008 account loss , ne 9. Practice S Example 1 exponential function for a graph that passes through the points. Write an 1. (2,16) and (3, 32) 2. (1, 1) and (3, 0.25) 4. (-2, 4) and (1, 0.5) Example 2 Write an exponential function for the graph. 7. 10 -2 4 31 4-3-2-10 S 3 85 -3 1 y Name: 1 2 3 4 x 1 2 3 4x 5. (1, 12) and (3, 192) 8. Go Online You can complete your homework online, 10. 4 3 2 1Q y 4 4 3 2 1 -4-3-2-10 P -3 3. (2, 90) and (4, 810) 6. (1, 18) and (3, 72) 2 3 4x AX Example 3 11. BIOLOGY A certain species of bacteria in a laboratory culture begins with 50 cells and doubles in number every 30 minutes. Write a function to model the situation. 12. DEPRECIATION Amrita bought a new delivery van for $32,500. The value of this van depreciates at a rate of 12% each year. Write a function to model the value of the van after x years of ownership. 13. COMMUNICATION Cell phone usage grew about 23% each year from 2010 to 2016. If cell phone usage in 2010 was 43 million, write a function to model U.S. cell phone usage over that time period. Lesson 8-3 Writing Exponential Functions 457 R
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