2/19/25, 11:44 AM Assessment 4
DSC1520-25-S1 Welcome Message Assessment 4
QUIZ
Question 1
Not yet answered
Marked out of 10.00
Integrate the function
2 3
f (x) = ∫ (20 + 3x + x ) dx.
a. 20x + x
3
+
1
x
4
+ C
4
b. 20x + x
3
+
1
x
4
4
2
c. 6x + 3x + C
2
d. 6x + 3x + C
e. None of the given options is correct.
Clear my choice
Question 2
Not yet answered
Marked out of 10.00
Integrate the function
12
t − √t
f (t) =
t
1
a. t 2
−
1
√t + C
12 2
1
b. t 2
−
2
+ C
12 √t
1
c. 1
11t 0 + + C
3
2√ t
1 1
d. t
12
− √t
12 2
e. None of the given options is correct.
Clear my choice
https://mymodules.dtls.unisa.ac.za/mod/quiz/attempt.php?attempt=23852412&cmid=1069590 1/5
,2/19/25, 11:44 AM Assessment 4
Question 3
Not yet answered
Marked out of 10.00
A tool hiring company has estimated that the rate of increase in the
maintenance cost of power drills is given by the equation
1,5
C (t) = 2 + t
where t is the time that the company is in operation for weeks. Calculate the
total maintenance cost during the first five weeks.
a. 32.4
b. 13.2
c. 13.2 + C
d. 32.4 + C
e. None of the given options is correct.
Clear my choice
Question 4
Not yet answered
Marked out of 10.00
Determine the integral
−−−−−− −
∫ √9x − 5dx.
−−−−−−−−
a. 2
√(9x − 5)3 + c
27
−−−−−−−
b. 2
√(9x − 5) + c
27
−−−−−−−
c. 1
√(9x − 5) + c
6
1 −−−−−−−−
d. √(9x − 5)3 + c
6
Clear my choice
https://mymodules.dtls.unisa.ac.za/mod/quiz/attempt.php?attempt=23852412&cmid=1069590 2/5
, 2/19/25, 11:44 AM Assessment 4
Question 5
Not yet answered
Marked out of 10.00
A firm’s marginal cost function is
2
Q + 2Q + 4.
Find the total cost function if fixed costs are 100.
3
a. Q 2
+ Q + 4Q + 100
3
3
b. Q 2
+ Q + 4Q + C
3
c. 2Q + 2
d. 2Q + 102
e. None of the given options is correct.
Clear my choice
Question 6
Not yet answered
Marked out of 10.00
Suppose the marginal revenue function for a good is
12 3
M R = 300 − 13q + 16q ,
where q is the number of units sold, and that total revenue from selling 1 unit is
R3 316. Find the total revenue function.
a. T R = 300q − q
13
+ 4q
4
+ 3 013
11 2
b. T R = 143q + 32q + 3 316
13 4 15
c. T R = 300q − q + 4q + 1, 95 × 10
13 4
d. T R = 300q − q + 4q
Clear my choice
https://mymodules.dtls.unisa.ac.za/mod/quiz/attempt.php?attempt=23852412&cmid=1069590 3/5
DSC1520-25-S1 Welcome Message Assessment 4
QUIZ
Question 1
Not yet answered
Marked out of 10.00
Integrate the function
2 3
f (x) = ∫ (20 + 3x + x ) dx.
a. 20x + x
3
+
1
x
4
+ C
4
b. 20x + x
3
+
1
x
4
4
2
c. 6x + 3x + C
2
d. 6x + 3x + C
e. None of the given options is correct.
Clear my choice
Question 2
Not yet answered
Marked out of 10.00
Integrate the function
12
t − √t
f (t) =
t
1
a. t 2
−
1
√t + C
12 2
1
b. t 2
−
2
+ C
12 √t
1
c. 1
11t 0 + + C
3
2√ t
1 1
d. t
12
− √t
12 2
e. None of the given options is correct.
Clear my choice
https://mymodules.dtls.unisa.ac.za/mod/quiz/attempt.php?attempt=23852412&cmid=1069590 1/5
,2/19/25, 11:44 AM Assessment 4
Question 3
Not yet answered
Marked out of 10.00
A tool hiring company has estimated that the rate of increase in the
maintenance cost of power drills is given by the equation
1,5
C (t) = 2 + t
where t is the time that the company is in operation for weeks. Calculate the
total maintenance cost during the first five weeks.
a. 32.4
b. 13.2
c. 13.2 + C
d. 32.4 + C
e. None of the given options is correct.
Clear my choice
Question 4
Not yet answered
Marked out of 10.00
Determine the integral
−−−−−− −
∫ √9x − 5dx.
−−−−−−−−
a. 2
√(9x − 5)3 + c
27
−−−−−−−
b. 2
√(9x − 5) + c
27
−−−−−−−
c. 1
√(9x − 5) + c
6
1 −−−−−−−−
d. √(9x − 5)3 + c
6
Clear my choice
https://mymodules.dtls.unisa.ac.za/mod/quiz/attempt.php?attempt=23852412&cmid=1069590 2/5
, 2/19/25, 11:44 AM Assessment 4
Question 5
Not yet answered
Marked out of 10.00
A firm’s marginal cost function is
2
Q + 2Q + 4.
Find the total cost function if fixed costs are 100.
3
a. Q 2
+ Q + 4Q + 100
3
3
b. Q 2
+ Q + 4Q + C
3
c. 2Q + 2
d. 2Q + 102
e. None of the given options is correct.
Clear my choice
Question 6
Not yet answered
Marked out of 10.00
Suppose the marginal revenue function for a good is
12 3
M R = 300 − 13q + 16q ,
where q is the number of units sold, and that total revenue from selling 1 unit is
R3 316. Find the total revenue function.
a. T R = 300q − q
13
+ 4q
4
+ 3 013
11 2
b. T R = 143q + 32q + 3 316
13 4 15
c. T R = 300q − q + 4q + 1, 95 × 10
13 4
d. T R = 300q − q + 4q
Clear my choice
https://mymodules.dtls.unisa.ac.za/mod/quiz/attempt.php?attempt=23852412&cmid=1069590 3/5
