(c) What was the yearly percentage growth rate of the cost of chemistry and physics periodicals? (Use the model found in part (a). Round your answer to one decimal place.) (d) If this exponential trend continues, what will be the expected average cost of physics and chemistry periodicals in 2021? Round your answer to the nearest dollar. (Use the model found in part (a).)
(c) What was the yearly percentage growth rate of the cost of chemistry and physics periodicals? (Use the model found in part (a). Round your answer to one decimal place.) (d) If this exponential trend continues, what will be the expected average cost of physics and chemistry periodicals in 2021? Round your answer to the nearest dollar. (Use the model found in part (a).)
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
Related questions
Question
100%
PART C & D ONLY
Transcribed Image Text:For this exercise, round all regression parameters to three decimal places.
The table below shows the average cost C, in dollars, of chemistry and physics periodicals t years after 1980.
t = years since 1980
C = cost in dollars
140
5
250
10
410
15
780
20
1300
22
1520
(a) Make an exponential model of C as a function oft.
OC = 87,324 x 0.527t
Oc = 191.584 x 1.864t
O C = 141.894 x 1.116
O c = 121.987 x 1.054
O c = 95.486 x 0.987t
(b) Plot the data and the exponential model.
1500
1500
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Transcribed Image Text:JUU
t
10
15
20
25
10
15
20
25
C
1500
1500
1000
1000
500
500
t
25
10
15
20
10
15
20
25
(c) What was the yearly percentage growth rate of the cost of chemistry and physics periodicals? (Use the model found in part (a). Round your answer to one decimal place.)
%
(d) If this exponential trend continues, what will be the expected average cost of physics and chemistry periodicals in 2021? Round your answer to the nearest dollar. (Use the model found in part (a).)
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