# Posts by Yu

Total # Posts: 26

**Math**

do you have the rest of the answers for the test?

**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 ...

**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.

**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.

**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 ...

**Chemistry**

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

**Chemistry**

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

**analytic**

11/2 and 9/2

**math**

15*15=225 x*x=x^2 (x+3)*(x+3)=X^2+9 225=x^2+x^2+9 225=2x^2+9 216=2x^2 108=x^2 10.39=x

**Engineering**

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

**Engineering**

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

**Physics**

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

**Physics**

BoobleGum, what is the value for U please?

**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 ...

**Quantum Physics**

Help please!

**Quantum Physics**

Help Please!

**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

**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 ...

**English**

foop

**statistics**

jhvhn

**physics**

20

**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...

**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'

**english**

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

**Economics(12 Multiple Choice)**

uy

**literature**

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