A delivery truck is purchased new for $54,000 . a. Write a linear function of the form y = m t + b to represent the value y of the vehicle t years after purchase. Assume that the vehicle is depreciated by $6750 per year. b. Suppose that the vehicle is depreciated so that it holds 70 % of its value from the previous year. Write an exponential function of the form y = V 0 b t , where V 0 is the initial value and t is the number of years after purchase. c. To the nearest dollar, determine the value of the vehicle after 4 yr and after 8 yr using the linear model. d. To the nearest dollar, determine the value of the vehicle after 4 yr and after 8 yr using the exponential model.
A delivery truck is purchased new for $54,000 . a. Write a linear function of the form y = m t + b to represent the value y of the vehicle t years after purchase. Assume that the vehicle is depreciated by $6750 per year. b. Suppose that the vehicle is depreciated so that it holds 70 % of its value from the previous year. Write an exponential function of the form y = V 0 b t , where V 0 is the initial value and t is the number of years after purchase. c. To the nearest dollar, determine the value of the vehicle after 4 yr and after 8 yr using the linear model. d. To the nearest dollar, determine the value of the vehicle after 4 yr and after 8 yr using the exponential model.
a. Write a linear function of the form
y
=
m
t
+
b
to represent the value y of the vehicle t years after purchase. Assume that the vehicle is depreciated by
$6750
per year.
b. Suppose that the vehicle is depreciated so that it holds
70
%
of its value from the previous year. Write an exponential function of the form
y
=
V
0
b
t
,
where
V
0
is the initial value and t is the number of years after purchase.
c. To the nearest dollar, determine the value of the vehicle after 4 yr and after 8 yr using the linear model.
d. To the nearest dollar, determine the value of the vehicle after 4 yr and after 8 yr using the exponential model.
What is a solution to a differential equation? We said that a differential equation is an equation that
describes the derivative, or derivatives, of a function that is unknown to us. By a solution to a differential
equation, we mean simply a function that satisfies this description.
2. Here is a differential equation which describes an unknown position function s(t):
ds
dt
318
4t+1,
ds
(a) To check that s(t) = 2t2 + t is a solution to this differential equation, calculate
you really do get 4t +1.
and check that
dt'
(b) Is s(t) = 2t2 +++ 4 also a solution to this differential equation?
(c) Is s(t)=2t2 + 3t also a solution to this differential equation?
ds
1
dt
(d) To find all possible solutions, start with the differential equation = 4t + 1, then move dt to the
right side of the equation by multiplying, and then integrate both sides. What do you get?
(e) Does this differential equation have a unique solution, or an infinite family of solutions?
Ministry of Higher Education &
Scientific Research
Babylon University
College of Engineering -
Al musayab
Automobile Department
Subject :Engineering Analysis
Time: 2 hour
Date:27-11-2022
کورس اول تحليلات
تعمیر )
1st month exam / 1st semester (2022-2023)/11/27
Note: Answer all questions,all questions have same degree.
Q1/: Find the following for three only.
1-
4s
C-1
(+2-3)2 (219) 3.0 (6+1)) (+3+5)
(82+28-3),2-
,3-
2-1
4-
Q2/:Determine the Laplace transform of the function t sint.
Q3/: Find the Laplace transform of
1,
0≤t<2,
-2t+1,
2≤t<3,
f(t) =
3t,
t-1,
3≤t 5,
t≥ 5
Q4: Find the Fourier series corresponding to the function
0
-5
Ministry of Higher Education &
Scientific Research
Babylon University
College of Engineering -
Al musayab
Subject :Engineering Analysis
Time: 80 min
Date:11-12-2022
Automobile Department
2nd month exam / 1" semester (2022-2023)
Note: Answer all questions,all questions have same degree.
کورس اول
شعر 3
Q1/: Use a Power series to solve the differential equation:
y" - xy = 0
Q2/:Evaluate using Cauchy's residue theorem,
sinnz²+cosz²
dz, where C is z = 3
(z-1)(z-2)
Q3/:Evaluate
dz
(z²+4)2
Where C is the circle /z-i/-2,using Cauchy's residue theorem.
Examiner: Dr. Wisam N. Hassan
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