11/01/13

Interpreting a bell curve questions
The bell curve I am given is exactly the same as the one shown on the website listed... more
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10/31/13

Very complicated integral
I'm looking for a solution to the following integral:int (1/sqrt[1 - x^2 + a (x^6 - x^12)]) dxwhere a is a parameter.Could you help me to find a solution? please!
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10/30/13

Quarter 1 POW #5
Two cars race around a circular track, in opposite directions, at constant rates. They start at the same position and meet every 30 seconds. If they move in the same direction, they meet every 120... more
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10/30/13

finding the phase shift
let y = √20sin(4piex+7e-1) what is the amplitude? what is the period? what is the phase shift? 
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10/30/13

Trig Identities
Explain how you could determine the exact value of (sec 7pi/6) if you know the value of (sin 11pi/6). Prove with diagrams.I've no idea how to do this question that's worth 10 marks.
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10/29/13

what is the answer
x+2y+z=7 x-y+z=1 2x+3y-z=9
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10/29/13

Countercurrent Heat Exchanger
A countercurrent heat exchanger is being used to heat a liquid food from 15 to 70°C. The heat exchanger has a 23-mm internal and 10 km length with an overall heat-transfer coefficient, based on the... more
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10/29/13

Cd 13 tracks
Suppose a CD you bought has 13 tracks. After listening to the CD you decide you like 5 of the songs. the random feature on your CD player will play eah of he 13 songs once in random order. Find the... more
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10/29/13

Please help me with a few questions I don't understand from my homework. Thank you!
1. If a>0, show that the function f(x)=(x^5)+ax-1 has precisely one real root.   2. Find the critical points and apply the second derivative test (or state that it fails). (a)... more
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10/29/13

how to solve this
x²+15<5x
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10/28/13

inverse derivative: y=sec^-1 1/t
please answer, i dont understand how to go about this problem. 
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10/27/13

Please help with this problem! I've been stuck for two hours now....
A thief is 10 meters away (8 meters ahead of you, across a street 6 meters wide).  The thief runs on his side at 7 meters per second, you run 9 meters per second.  How fast are you approaching the... more
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10/27/13

Convective Heat Transfer
100 kg of water in a closed insulated autoclave is heated from 20 to 90 °C by a heating coil made of 12 m of 1-in O.D., 15-BWG-gauge copper tubing (ID=2.174 cm). When steam at 100 °C issued in the... more
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10/27/13

Intro to Food Engineering
Refrigerant is flowing though a ¾ inch O.D. copper tube under conditions such that its mixed temperature is 15 °F. Condensation of moisture from the atmosphere on the outside of the tube is... more
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10/27/13

The initial population of a town is 800 people and it grows with a doubling time of 7 years. What will the population be in 25 years?
I need to know what the population will be in 25 years.
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10/27/13

What is the limit of this question?
Lim x-->∞  (1+1/x)x
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10/26/13

Complex sequence
Given sequence is 1+2+2+3+3+3+4+4+4+4 find sum.
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10/26/13

Find four perpendicular unit vectors?
Find four perpendicular unit vectors with all components equal to 1/2 or -1/2.
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10/26/13

What is that least?
An overhead view of a 12 kg tire that is to be pulled by three horizontal ropes. One rope's force (F1=50 N) is indicated. The forces from the other ropes are to be oriented such that the tire's... more
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10/26/13

Could you help me to find a solution for this integral?
int {1/(x^2 Sqrt[1 - b^2/x^2 + (k/E) (exp[-2 a (x - c)] - 2 exp[-a (x - c)])])} dx   a,b,c,E,k are parameters
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10/26/13

Unsolved AP
Given sequence is 1,2,4,7,11,16... Find 125th term and also find sum.(good luck)
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10/25/13

How could you prove?
How could you prove cube root of (xyz)≤(1/3)(x+y+z)(geometric mean≤arithmetic mean)?
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10/25/13

What are the smallest and largest values?
If llvll=5 and llwll=3, what are the smallest and largest values of llv-wll? What are the smallest and largest values of v*w?
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10/24/13

Please help me with math?
Why is abs(cos θ) never greater than 1 in the first place?
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10/23/13

Where does 13 go in this sequence 8 11 5 4 9 1 7 6 10 3 12 2
Grade 3 problem that dad with a university degree can't solve
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