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TZand
2,330 points (Ranked #17)
Member Information
Name:
Toby Zandur
Location:
Auckland, New Zealand
Age:
Over 40 years old
School:
Member Since:
9/8/2008
About Me:
Nature lover. You would be too if you lived in NZ!
TZand Administers 0 Study Groups
TZand does not administer any study groups
TZand is a member of 2 Study Groups
The History of Women
6 Members
This is a study group to cover the history of women in the world and their struggle for equality.
Real Estate License
432 Members
This is a study group dedicated to those wishing to become real estate Sales Agents or brokers.
Member Points
Complete registration
10 Points
Worth 10 points. Achieved 1 time.
Author a public question
120 Points
Worth 5 points. Achieved 24 times.
Create an exam that is taken 25 times
600 Points
Worth 300 points. Achieved 2 times.
Create an exam that is taken 100 times
1600 Points
Worth 800 points. Achieved 2 times.
Total
2,330 Points
How Points Work
TZand Administers 2 Exams
Calculus
Founded by
TZand
This is a calculus exam where one will need to know the quotient rule, the chain rule, and the product rule.
Details
Trees - Easy
Founded by
TZand
This is an easy exam covering various trees. I have added pictures to each question to help show the beauty of each tree.
Details
TZand’s Activity
TZand
Founded the exam
Calculus
which has been taken 100 times
TZand
Founded the exam
Trees - Easy
which has been taken 100 times
TZand
Founded the exam
Calculus
which has been taken 25 times
TZand
Founded the exam
Trees - Easy
which has been taken 25 times
TZand
Added the question
A little girl buys a spherical balloon of total volume 1 cubic foot. She starts blowing to fill the balloon at a rate of .1 cubic feet per minute. How fast is the radius of the balloon increasing when she has the ballon halfway blown up?
to the exam
Calculus
TZand
Added the question
Implicitly differentiate at (1,1).
to the exam
Calculus
TZand has Authored 24 Questions
Authored by
TZand
Please solve the following:
A.
B.
C.
D.
Replace 6 with 2 · 3, so
6
20
= (2 · 3)
20
2
20
· 3
20
Now just collect the powers of 2 and 3 and subtract the exponents:
Details
|
Answer
Authored by
TZand
Implicitly differentiate
at (1,1).
A. -3/14
B. 3/14
C. -4/12
D. -12/4
We differentiate term-by-term to get
.
Substituting
x
=1,
y
=1 we get
4 + 2
y
' +
y
' + 9
y
'=0,
so
y
'=-4/12
Details
|
Answer
Authored by
TZand
A little girl buys a spherical balloon of total volume 1 cubic foot. She starts blowing to fill the balloon at a rate of .1 cubic feet per minute. How fast is the radius of the balloon increasing when she has the ballon halfway blown up?
A.
B.
C.
D.
The relationship between radius and volume for a sphere of radius
r
is
, so we differentiate implicitly with respect to
t
to get the relationship for the rates
. The balloon is half full (one half of a cubic foot) when
, which we solve to get
, and we have that
so we have
which we solve to get
Details
|
Answer
Authored by
TZand
Suppose the position of an accelerating bobsled is given by
feet . What is the acceleration of the bobsled when t = 1?
A.
B.
C.
D.
The acceleration is given by
so when
t
=1the acceleration is
Details
|
Answer
Authored by
TZand
Which of the following options is NOT a derivative of
y
= (1+2
x
)
4/5
A.
y
'(
x
) = (2) (4/5) (1+2
x
)
-1/5
=(8/5)(1+2
x
)
-1/5
B.
y
''(
x
) = (2)(-1/5)(8/5)(1+2
x
)
-6/5
= (-16/25)(1+2
x
)
-6/5
C.
y
'''(
x
) = (2)(-9/25)(-7/5)(1+2
x
)
-11/5
= (197/125)(1+3
x
)
-11/5
D.
y
'''(
x
) = (2)(-16/25)(-6/5)(1+2
x
)
-11/5
= (192/125)(1+2
x
)
-11/5
y
'''(
x
) = (2)(-9/25)(-7/5)(1+2
x
)
-11/5
= (197/125)(1+3
x
)
-11/5
is not a derivative of
y
= (1+2
x
)
4/5
Details
|
Answer
Authored by
TZand
Differentiate the following function:
A.
B.
C.
D.
Using the quotient rule we find that,
Hence,
Details
|
Answer
View All 24 Questions TZand Has Authored
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