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Subhotosh Khan
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Subhotosh Khan
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Join Date
06-18-2007
Last Activity
Yesterday
09:11 PM
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Yesterday,
08:18 PM
Subhotosh Khan
replied to a thread
Difficulty proving a statement
in
Calculus
Can you please show us the process by which you had proved W(T) is increasing?
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1 replies | 16 view(s)
07-26-2017,
08:33 PM
Subhotosh Khan
replied to a thread
Can't Solve Equation ---> x(ln(975(0.93))) = ln(-7x+350)
in
Calculus
What is the value of: ln(975(0.93)) = ? Also notice: ln(-7x+350) = ln(7) + ln(50 - x)
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6 replies | 134 view(s)
07-26-2017,
08:30 PM
Subhotosh Khan
replied to a thread
finding the value of these given inputs?
in
Calculus
What are your thoughts? Please share your work with us ...even if you know it is wrong. If you are stuck at the beginning tell us and we'll...
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3 replies | 130 view(s)
07-26-2017,
12:09 PM
Subhotosh Khan
replied to a thread
Work rate problem. Gaz, Bert and Bob.
in
Beginning Algebra
You posted this problem in Arithmetic section. Do you know algebra? Rate problems are lot easier to do with algebra! Please let us know whether...
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8 replies | 245 view(s)
07-26-2017,
07:39 AM
Subhotosh Khan
replied to a thread
Solve the differential equation.
in
Calculus
You should know that: \displaystyle{e^{2ln(x)} \ = \ x^2} because: \displaystyle{e^{ln(x)} \ = \ x}
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6 replies | 121 view(s)
07-26-2017,
07:29 AM
Subhotosh Khan
replied to a thread
Graph sketch problem.
in
Calculus
What is the definition of concavity?
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5 replies | 99 view(s)
07-26-2017,
07:27 AM
Subhotosh Khan
replied to a thread
Work rate problem. Gaz, Bert and Bob.
in
Beginning Algebra
Please show us: How did you calculate Gaz's time of completion to be 108 minutes?
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8 replies | 245 view(s)
07-26-2017,
07:24 AM
Subhotosh Khan
replied to a thread
finding domain and range?
in
Beginning Algebra
What, for a function, are the definitions of (a) domain and (b) range?
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3 replies | 117 view(s)
07-25-2017,
07:15 PM
Subhotosh Khan
replied to a thread
Physical Applications of the Definite Inregrals
in
Calculus
What would be the shape of the area, if you were given first quadrant of: (x/a)^2 + (y/b)^2 = 1 Does that equation look familiar?
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4 replies | 107 view(s)
07-25-2017,
07:03 PM
Subhotosh Khan
replied to a thread
Finding zeros(dimensions) of a box using the rational zero theorem
in
Intermediate/Advanced Algebra
w2(w+2) = 96 →since only 1, 4 and 16 are possible square factors of 96, one of those possibly is a solution. Which one?
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10 replies | 241 view(s)
07-25-2017,
10:35 AM
Subhotosh Khan
replied to a thread
Finding zeros(dimensions) of a box using the rational zero theorem
in
Intermediate/Advanced Algebra
Can please tell us: What is rational root theorem (as you know it)?
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10 replies | 241 view(s)
07-25-2017,
09:55 AM
Subhotosh Khan
replied to a thread
Finding zeros(dimensions) of a box using the rational zero theorem
in
Intermediate/Advanced Algebra
Great! Now your equation is: 2w3+4w2 - 192 = 0 or f(w) = w3 + 2w2 - 96 Now apply rational root (zero) theorem. What are the possible...
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10 replies | 241 view(s)
07-24-2017,
07:49 PM
Subhotosh Khan
replied to a thread
How do I solve this problem
in
Intermediate/Advanced Algebra
First eliminate parentheses by distribution of (-1/9) and (1/3). Then collect the terms with 'x' on side of the equation and the numbers on the other...
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8 replies | 167 view(s)
07-24-2017,
10:56 AM
Subhotosh Khan
replied to a thread
IMO 2016, class 8 Chapter 5 question 3 Cubes and Cube roots
in
Beginning Algebra
If \displaystyle{ \sqrt{ 3 * \left{x} - \frac{1}{\sqrt{x}}\right]} =2\\ then\\ \sqrt{x} + \frac{1}{\sqrt{x}} =?} replace: y = x^(1/3) then you...
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6 replies | 188 view(s)
07-18-2017,
02:13 PM
Subhotosh Khan
replied to a thread
integral((t+3)/sqrt(t^3 +1))dt
in
Calculus
Substitute: t^3 = tan^2(Θ) 3t^2 dt = 2tan(Θ)*sec^2(Θ) dΘ dt = 2/3 * ^(-1/3) * sec^2(Θ) dΘ ...... continue....
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5 replies | 204 view(s)
07-18-2017,
11:51 AM
Subhotosh Khan
replied to a thread
Average driving time: A car is driving to a destination that is 350km's away...
in
Arithmetic
I am going to assume that when they say - "The car travelling is averaging 120km/hr" - they did not include the breaktime in that average Suppose...
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5 replies | 436 view(s)
07-18-2017,
08:45 AM
Subhotosh Khan
replied to a thread
summation of series (method of differences): when we use ∑ f(r)- f(r-1),then it will
in
Intermediate/Advanced Algebra
Is your assignment: ∑ f(r)- f(r-1)] = Sum If it is, then those parentheses are super important. Without those, the meaning of the problem...
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1 replies | 135 view(s)
07-18-2017,
04:43 AM
Subhotosh Khan
replied to a thread
Labour and the unit price for equipment: Backhoe rental rate is $135.00 per hour...
in
Finance/Business Math
How long does it take for the dump truck to take load to the dump-site, dump it and come back - ready to carry the next load?
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5 replies | 354 view(s)
07-17-2017,
04:02 PM
Subhotosh Khan
replied to a thread
Area in Circle with two chords
in
Geometry and Trig
Flip the triangle around its base (within the circle) and look at the resulting figure....
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15 replies | 851 view(s)
07-17-2017,
10:09 AM
Subhotosh Khan
replied to a thread
Understanding summation notation: (1/n) sum[i=1 to n] X_i
in
Intermediate/Advanced Algebra
What is the problem?
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4 replies | 251 view(s)
07-17-2017,
06:09 AM
Subhotosh Khan
replied to a thread
Marginal cost: what is meaning of term "one unit"?
in
Finance/Business Math
It depends on the total span of time under consideration. If only one day is being considered - then the rate could be (10001/24 =) 417 units/hr....
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11 replies | 544 view(s)
07-16-2017,
03:16 PM
Subhotosh Khan
replied to a thread
Finding unknown variable in a Limit problem
in
Calculus
Note that the as x → 1, the denominator → 0.
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6 replies | 322 view(s)
07-16-2017,
12:55 PM
Subhotosh Khan
replied to a thread
[HELP] Factoring 4 terms: x^3 - x^2 - x + 10
in
Intermediate/Advanced Algebra
What are the rules that you have been taught (e.g. rational root theorem, polynomial division, etc.) to assist you in such problems?
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3 replies | 290 view(s)
07-16-2017,
12:49 PM
Subhotosh Khan
replied to a thread
Rate of Change in Distance: Two persons are running along separate path....
in
Intermediate/Advanced Algebra
What are your thoughts? Please share your work with us ...even if you know it is wrong. If you are stuck at the beginning tell us and we'll...
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4 replies | 329 view(s)
07-16-2017,
10:35 AM
Subhotosh Khan
replied to a thread
Gauss Vanzel's theorem is outdated ?
in
Geometry and Trig
I could not find Gauss-Vanzell theorem in the internet! Is this same as the Gauss's divergence theorem (or Ostrogradsky's theorem - as known in...
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6 replies | 476 view(s)
07-16-2017,
09:01 AM
Subhotosh Khan
replied to a thread
Probability of a birthday being on a Monday for 3750 people
in
Probability / Statistics
Now think about these three scenarios: A firm employs 3750 people. One person is chosen at random. What is the probability that only that...
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5 replies | 278 view(s)
07-15-2017,
07:30 PM
Subhotosh Khan
replied to a thread
% question: service ratings rec'vd: Overall % rated at 4.85 out of possible 5.00
in
Beginning Algebra
You did not answer my question!!! You scored 5 points from each of the 12 respondents. How many total points (from 12) is that ?
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12 replies | 628 view(s)
07-15-2017,
06:24 PM
Subhotosh Khan
replied to a thread
% question: service ratings rec'vd: Overall % rated at 4.85 out of possible 5.00
in
Beginning Algebra
That was a typo - fixed it.... So you got total 63 points from 13 respondents. You scored 5 points from each of the 12 respondents. How many...
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12 replies | 628 view(s)
07-15-2017,
05:49 PM
Subhotosh Khan
replied to a thread
% question: service ratings rec'vd: Overall % rated at 4.85 out of possible 5.00
in
Beginning Algebra
Okay ... I'll start you off... Please calculate: total points received = 4.85 * 13 = 63.05 → probable total points received = 63 ...............
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12 replies | 628 view(s)
07-15-2017,
05:36 PM
Subhotosh Khan
replied to a thread
% question: service ratings rec'vd: Overall % rated at 4.85 out of possible 5.00
in
Beginning Algebra
What are your thoughts? Please share your work with us ...even if you know it is wrong. If you are stuck at the beginning tell us and we'll...
see more
12 replies | 628 view(s)
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About Subhotosh Khan
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“... mathematics is only the art of saying the same thing in different words” - B. Russell
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09:11 PM
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