# Posts by Yu

Total # Posts: 25

**S.S ( Please help me Ms. Sue!! )**

Melody, what were the answers?

*March 15, 2017*

**Maths**

2/5 of the boys don't know how to swim, so 2/5 * 1/3= 2/15 of the total people are boys who cannot swim. Likewise for girls, 3/5 * 2/3= 6/15 of the total people are girls who cannot swim. Thus, 1- 2/15 - 6/15= 7/15 of the total people are swimmers. Thus, there are 490 ...

*July 9, 2014*

**Math**

Parametrically represent a Mobius strip. Since I am very unfamiliar with this topic, Math jargon should appear as little as possible and please provide step by step working.

*July 9, 2014*

**Math logarithms**

The graph, y=lg x is rotated 90 degrees anticlockwise around the origin. What is the equation of the new graph? Please provide proof.

*April 30, 2014*

**Chemistry**

Which method(High Performance Liquid Chromatography or Gas Liquid Chromatography) would be suitable for the separation of the following mixtures? 1) Mixture of paracetamol, codeine and caffeine. 2) Mixture of alpha-pinene, beta-pinene, eucalyptol, alpha-terpineol. Please ...

*January 12, 2014*

**Chemistry**

How is the high performance liquid chromatography column designed to ensure greater efficiency?

*January 11, 2014*

**Chemistry**

How can reaction intermediates in an organic synthesis be separated and recovered using thin layer chromatography?

*January 11, 2014*

**analytic**

11/2 and 9/2

*November 26, 2013*

**Engineering**

Thanks simonsay, in q1_2_1: 300 is wrong for me, is there maybe a -300?

*May 23, 2013*

**Engineering**

Trustee thanks the first two answers right but third one is wrong, can you check please?

*May 23, 2013*

**Physics**

Can someone explain with values for I = dQ/dt please?

*May 22, 2013*

**Physics**

BoobleGum, what is the value for U please?

*May 22, 2013*

**math**

In a manufacturing process, each item leaving an assembly line will be examined by two inspectors: A and B individually. Based on past experiences, Inspector A detects 60% of the defective items. If the defective items are not detected by Inspector A, 90% of them will be ...

*April 9, 2013*

**Quantum Physics**

Help please!

*March 24, 2013*

**Quantum Physics**

Help Please!

*March 24, 2013*

**statistics help please!**

maximize p = 2x+3y subject to 1.25x+y<=100 x+y>=30 x<=50 y<=75 x>=0 y>=0) graphic method for linear programing

*January 20, 2013*

**Computer Science**

I need some help about Turing Machines, and prove by reductions. Here are the 2 questions: 1. Sketch the construction of a Turing Machine that decides the language L = a^i where i is not prime. 2. Show that the language 2Strings is not recursive by reducing any one of the two ...

*December 8, 2012*

**English**

foop

*November 20, 2012*

**statistics**

jhvhn

*November 5, 2012*

**calculus**

Tower 1 is 90 ft high and tower 2 is 40 ft high. The towers are 200 ft apart. A guy wire is to run from point A to the top of each tower. [See a picture of this situation on page 274 of the textbook.] How many feet from tower 1 should point A be so that the total length of guy...

*November 9, 2010*

**Calculus**

Use Chain Rule 1=cos(xy^2)(y^2+2xyy') 1=cos(xy^2)y^2+(2xy)cos(xy^2)(y') [1-cos(xy^2)y^2]/[(2xy)cos(xy^2)]=y'

*November 9, 2010*

**english**

can anyone give me a thesis statement on conscience in hamlet. pls

*April 21, 2010*

**Economics(12 Multiple Choice)**

uy

*November 26, 2009*

**literature**

An effort to bring civilization with them... I just took the test. This answer is 100% correct, I promise!

*May 19, 2009*

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