Wednesday

January 18, 2017
Total # Posts: 2,411

**Math- steve or ms. sue**

does the data in the table represent a direct variation or an inverse variation? x 2 4 8 12 y 4 2 1 2/3 Choices: inverse variation; xy = 8 direct variation; y = 8x inverse variation;y/x = 8 *direct variation; y = 8/x Thank You.

*April 17, 2013*

**Clinical Chemistry**

DrBob???

*April 16, 2013*

**Clinical Chemistry**

Anyone here good with clinical chemistry, particularly separation assays and high performance liquid chromatography?

*April 16, 2013*

**College Algebra**

Ahh I can't believe I didn't see that! I appreciate your help!

*April 16, 2013*

**College Algebra**

Theres this chemistry problem im getting stuck in because i'm confusing myself with the math. Equation given = %O2 saturation = 100 x (pO2/(pO2 + K) %O2 = 35 K = 1.51 how do I calculate pO2?? I can't seem to cancel them out correctly. Answer = 0.813

*April 16, 2013*

**calculus**

Determine the maximum and minimum of each function on the given interval. a) = 2x^3 − 9x^2 ,−2 ≤ x ≤ 4 b) = 12x − x^3 , x∈ [−3,5]

*April 16, 2013*

**Grade 12 Calculus**

Determine the absolute extrema of each function on the given interval. Illustrate your results by sketching the graph of each function. a) f(x) = x^2 − 4x + 3 , 0 ≤ x ≤ 3 b) f(x) = (x − 1)^2&#...

*April 15, 2013*

**MATH**

Find all solutions of the equation tan^5 x - 9tan x =0. The answer is Ak\pi where k is any integer, the constant A=???

*April 14, 2013*

**math**

4 * 15.00= $60

*April 14, 2013*

**pre calculus**

Simplify and write the trigonometric expression in terms of sine and cosine: ((2+tan^2 x)/(sec^2 x))-1 = (f(x))^2 f(x)= ??

*April 14, 2013*

**pre calculus please help**

Find all solutions of the equation tan^5 x - 9tan x =0. The answer is Ak\pi where k is any integer, the constant A=???

*April 14, 2013*

**pre calc**

Find all solutions of the equation 3sin^2 x -7sin x +2 = 0 in the interval [0,2pi). The answer is x_1= ?? and x_2= ?? with x_1<x_2.

*April 14, 2013*

**pre calculus**

Simplify and write the trigonometric expression in terms of sine and cosine: sin x + (cot x cos x) = 1/(f(x) f(x)= ???

*April 14, 2013*

**math**

Find all solutions of the equation tan^5 x - 9tan x =0. The answer is Ak\pi where k is any integer, the constant A=???

*April 14, 2013*

**Math**

2 divide 69.28 plz give work too!

*April 8, 2013*

**PHILOSOPHY**

Who claimed that our subjection to pain and pleasure should be the foundation for our lives?

*April 8, 2013*

**Math**

kkk thanks? i don't see how to do it tohugh.................................. though* ...........................................

*April 4, 2013*

**foundations of algebra**

if 950 watts gives a 164 mile radius, how much power is needed to get a 150,000 square mile area?

*April 4, 2013*

**Geography**

Why did East Pakistan feel discriminated against by west Pakistan

*April 4, 2013*

**advance functions gr12 HELP ASAP**

use the asymptotes and intercepts to make a quick sketch of the function f(x)= x-2 (numerator) x+4(denominator) and its reciprocal f^r = x+4 (numerator) x-2 (denominator) on the same set of axes. b) describe the symmetry in the graphs in part a) c) determine the intervals of ...

*April 2, 2013*

**advance functions gr12 HELP ASAP**

Using rational functions solve 7+ (1)/x = 1/(x-2) thank you

*April 2, 2013*

**advance functions gr12 (SORRY LAST ONE HAD A TYPO)**

Using rational functions solve 7+ (1)/x = 1/(x-2)

*April 2, 2013*

**advance functions gr12**

Using rational functions solve (7+ 1)/x = 1/(x-2)

*April 2, 2013*

**advance functions gr12**

use the asymptotes and intercepts to make a quick sketch of the function f(x)= x-2 (numerator) x+4(denominator) and its reciprocal f^r = x+4 (numerator) x-2 (denominator) on the same set of axes. b) describe the symmetry in the graphs in part a) c) determine the intervals of ...

*April 2, 2013*

**advance functions gr 12**

Using rational functions solve 7+ 1(numerator) x (denominator) = 1 (numerator) x-2(demominator)

*April 2, 2013*

**advance functions gr 12**

use the asymptotes and intercepts to make a quick sketch of the function f(x)= x-2 (numerator) x+4(denominator) and its reciprocal f^r = x+4 (numerator) x-2 (denominator) on the same set of axes. b) describe the symmetry in the graphs in part a) c) determine the intervals of ...

*April 2, 2013*

**advance functions gr 12**

use the asymptotes and intercepts to make a quick sketch of the function f(x)= x-2 (numerator) x+4(denominator) and its reciprocal f^r = x+4 (numerator) x-2 (denominator) on the same set of axes. b) describe the symmetry in the graphs in part a) c) determine the intervals of ...

*April 1, 2013*

**Math advance functions gr 12**

use the asymptotes and intercepts to make a quick sketch of the function f(x)= x-2 (numerator) x+4(denominator) and its reciprocal f^r = x+4 (numerator) x-2 (denominator) on the same set of axes. b) describe the symmetry in the graphs in part a) c) determine the intervals of ...

*April 1, 2013*

**advance functions gr 12**

Using rational functions solve 3(numerator) 2x-4 (denominator) < (with a "-" underneath) 4 (numerator) x-2(demominator)

*April 1, 2013*

**Maths**

Suppose that a boat moves in a straight line with speed v through water with resistance proportional to the square of its speed v with initial speed v0 and initial position x0. Find its speed v(t) and position x(t) and conclude that the boat travels an infinite distance.

*March 25, 2013*

**chemistry**

An electron of wavelength 1.74*10-10m strikes an atom of ionized helium (He+). What is the wavelength (m) of the light corresponding to the line in the emission spectrum with the smallest energy transition?

*March 25, 2013*

**chemistry**

An electron of wavelength 1.74*10-10m strikes an atom of ionized helium (He+). What is the wavelength (m) of the light corresponding to the line in the emission spectrum with the smallest energy transition?

*March 25, 2013*

**Chemistry (Immunoassays)**

What is the common component that makes a homogeneous competitive immunoassay? Describe one.

*March 24, 2013*

**calculus**

A polynomial function p(x) has a relative maximum at (3, -4) a relative minimum at (-1, -6), a relative maximum at (-5, 2) and no other critical points. How many zeros does p(x) have?

*March 23, 2013*

**College Chemistry/Lab Math**

Thanks for the help!

*March 17, 2013*

**College Chemistry/Lab Math**

Why did you multiply 0.0001g of gold/mL by 0.10mL? Shouldnt it be .50 mL? I say this because .10 is the volume of serum added, which does not contribute to the total amount of gold in the final solution.

*March 17, 2013*

**College Chemistry/Lab Math**

Sorry, in my 3rd step it should be "(.5ml)/(1)"

*March 17, 2013*

**College Chemistry/Lab Math**

I think I have this problem figured out correctly, but is there anyone who can tell me if I'm doing something wrong. The question is... "One troy ounce of gold is worth $380. There are 33.8 grams per troy ounce. You have a stock colloidal solution of a very fine gold ...

*March 17, 2013*

**math**

The diagram shows a sector OAB of a circle, centre O and radius10 cm. Angle AOB is theta radians. The point C lies on OB and iss such that AC is perpendicular to OB. The region R is bounded by the arc AB and by the lines AC and CB. The area of R is 22cm^2 1. show that theta=0....

*March 16, 2013*

**math**

How do I measure 5.25% of a 6% bleach for 1 gallon?

*March 15, 2013*

**math**

How do I measure 5.25% of a 6% bleach for 1 gallon?

*March 15, 2013*

**Chemistry**

For the reaction ? FeCl2 + ? Na3PO4 → ? Fe3(PO4)2 + ? NaCl what is the maximum mass of Fe3(PO4)2 that could be formed from 5.25 g of FeCl2 and 1.62 g of Na3PO4? Answer in units of g

*March 13, 2013*

**math**

16/28 as a percent and round to the nearest percent

*March 11, 2013*

**College Physics**

Well, Angular acceleration is just a measure of how many radians does the object's speed change by every second it moves around the center of a circle(α = rads/s^2). You are given a track radius, diameter, and coefficient of friction. F = Ma emulates motion in a ...

*March 9, 2013*

**Statistics**

The 60th percentile of a normal distribution is 110. The 70th percentile is 120. Find the 90th percentile.

*March 7, 2013*

**Statistics**

Find the 35th percentile of the normal distribution with mean 270 and SD 25.

*March 7, 2013*

**Statistics**

Fill in the blank: 50% of the area under the standard normal curve is between -0.5 and _____________.

*March 7, 2013*

**Statistics**

The average weight of a group of people is 156 pounds and the SD is 25 pounds. A statistician wants to transform the weights so that the transformed weights have an average of 100 pounds and an SD of 10 pounds. Fill in the blanks; both blanks must be filled in correctly for ...

*March 7, 2013*

**Fin 3oo**

The Lo Tech Co. just issued a dividend of $ 2.20 per share on its common stock. The company is expected to maintain a constant 6 percent growth rate in its dividends indefinitely. If the stock sells for $ 43 a share, what is the company’s cost of equity?

*March 3, 2013*

**maths and physics**

A particle of mass 4 kg is attached to one end of an inelastic string and a particle of mass 2 kg is attached to the other end of the string.The string has length 4m and is hung over a smooth pivot at its midpoint. The Pivot lies 3m above the ground.How long does it take for ...

*March 3, 2013*

**science**

What is the density of the baseball?

*March 3, 2013*

**Math**

There are 38 animals at a farm .some are cows and some are chickens . All together there are 124legs. How many cows and how many chickens?

*March 2, 2013*

**Math**

There are 38 animals at a farm.some are cows some are chickens all together there are 124 legs . How many cows and how many chickens?

*March 2, 2013*

**Math**

Thanks Steve I understand

*February 27, 2013*

**Math**

George walks 3 km on Monday and 4 km of Tuesday and 2.5 km on Thursday . On Monday, he walked 25 mins., Tuesday 40 mins., and Thursday 30 mins. What is his average speed? t= D=

*February 27, 2013*

**Spanish: PLEASE HELP**

Please help. Thank You. 1. The stem-changers in the current section are similar to those in the previous section except these stem-change "o" to "oe." *A.) true B.) false 2. Of the following, which is not a stem-changing verb? A.) almorzar *B.) comer C.) ...

*February 26, 2013*

**math**

6. Solve by factoring. m² + 8m + 7 = 0 (1 point)8, 7 –7, 1 *–7, –1 7, 1 7. Solve by factoring. n² + 2n – 24 = 0 (1 point)–12, 2 –2, 12 *–6, 4 –4, 6 Please Help

*February 26, 2013*

**Spanish: Please help**

Please help. Thank You. 1. The stem-changers in the current section are similar to those in the previous section except these stem-change "o" to "oe." A.) true B.) false 2. Of the following, which is not a stem-changing verb? A.) almorzar B.) comer C.) ...

*February 26, 2013*

**Spanish**

Please help. Thank You. 1. The stem-changers in the current section are similar to those in the previous section except these stem-change "o" to "oe." A.) true B.) false 2. Of the following, which is not a stem-changing verb? A.) almorzar B.) comer C.) ...

*February 26, 2013*

**Spanish: Please help**

Please help. Thank You. 1. The stem-changers in the current section are similar to those in the previous section except these stem-change "o" to "oe." A.) true B.) false 2. Of the following, which is not a stem-changing verb? A.) almorzar B.) comer C.) ...

*February 26, 2013*

**Spanish: Please check answers**

Thank You.

*February 26, 2013*

**Spanish: Please check answers**

Please check my answers. The answers are at thebottom. 11. Choose the most logical sentence completion. Yo _______ el libro a la biblioteca. vuelvo devuelvo puedo duermo 12. Choose the most logical sentence completion. Ellos __________ en el café. cuestan cuentan ...

*February 26, 2013*

**Physics -Conservation of Momentum-**

1) here, conservation of momentum , V(1+.7) = 1*1 V =0.588 m/s for further help , please refer to besthomeworkhelp . com

*February 24, 2013*

**Chemistry**

A 0.010M solution of base B is 15% dissociated. Calculate the Kb for base B.

*February 24, 2013*

**physics**

You are working in an ice skating rink and have been asked to hang a new banner on the wall. Your friend is helping you so that the ladder does not collapse by exerting a force FAL at an angle relative to the horizontal. how do you set this up?

*February 24, 2013*

**physics 12**

a certain binary star system consists of two stars of masses m and 3m respectively separated by a distance of 1.5 x 10^12 m, measured between their centres. Theres stars revolve in sync with each other around their common centre of mass like a giant dumbbell. If the smaller ...

*February 19, 2013*

**math**

. A bag contains 3 marbles: a red one, a white one, and a green one. Suppose that two marbles are selected without replacement. (a) How many outcomes are in the sample space? List them (b) What is the probability that a red marble, and then a green marble (in that order) are ...

*February 19, 2013*

**math**

If you invested a penny on Jan 1,1776 at 10% interest compounded daily, how much would you have on jan 1 2011?

*February 18, 2013*

**math**

if you invest $25,000 in an account that gets 12% annual interest compounded quarterly, how much would you have in 10 years?

*February 18, 2013*

**Inter. Reading**

Are the answers below correct: My aunt has only rigor success in quitting smoking. Every few months she succumb to temptation, and then she has to quit all over again. Choose from: Intermittent,Succumb and rigor.

*February 18, 2013*

**Ap calc**

Consider the function h(x) = a(-2x+1)^5-b, where a doesn't equal 0 and b doesn't equal 0 are constants. A. Find h'(x) and h"(x) B. show that h is monotonic ( that is, that either h always increases or remains constant or h always decreases or remains constant...

*February 18, 2013*

**Euclid's Geometry , geometric constructions**

Find the area of the triangle whose vertices (on cartesian graphs) are (-1,5) , (-2,-3) & (10,1)

*February 18, 2013*

**ap calc**

a particle moves along the x-axis so that its velocity at any time t is equal to or > 0 is given by v(t)= (2pie-5)t-sin(piet) a.find the acceleration at any time t. b.find the minimum acceleration of the particle over the interval [0,3] c.find the maximum velocity of the ...

*February 17, 2013*

**ap calc**

a particle moves along the x-axis so that its velocity at any time t is equal to or > 0 is given by v(t)= (2pie-5)t-sin(piet) a.find the acceleration at any time t. b.find the minimum acceleration of the particle over the interval [0,3] c.find the maximum velocity of the ...

*February 17, 2013*

**Drama**

I'm just wondering why are the senses important in drama?

*February 14, 2013*

**Math**

A taxi company charged $4.40 for a 2 mile trip. It charges certain amount for each 1/5 mile traveled. It charges twice as much for the first 1/5 mile. How muchis charged for the first 1/5 mile and each 1/5 mile after the first one?

*February 13, 2013*

**calculus**

Consider the given function and the given interval. f(x) = 4 sin x − 2 sin 2x, [0, π] (a) Find the average value fave of f on the given interval. fave = (b) Find c such that fave = f(c). (Round your answers to three decimal places.) c = (smaller value) c = (larger ...

*February 11, 2013*

**physics**

8. Electric field lines arising from two small charged particles P and Q. Consider the following two statements: i.The charge on P is smaller than the charge on Q. ii.The electrostatic force on P is smaller than that on Q. Which of the above statements are true? A) Only i. B) ...

*February 9, 2013*

**physics**

1. When an ideal gas is expanded adiabatically in volume at constant pressure, the average kinetic energy of the gas molecule: A. Increase B. decreases C. Does no change i know the answer is B but can someone explain why please? i thought it does not change since its ...

*February 9, 2013*

**MAth**

A model length of 12 cm. represents an actual length of 102 feet. What is the scale model?

*February 8, 2013*

**physics**

A football player runs the pattern given in the drawing by the three displacement vectors A, B, and C. The magnitudes of these vectors are A = 5.0 m, B= 15 m, and C = 18 m. Using the component method, find the magnitude and direction è of the resultant vector

*February 8, 2013*

**HARD PHYSICS**

which way do electric-field lines point, from high to low potential or from low to high? Explain please

*February 7, 2013*

**chemistry**

Calculate the molarity of a solution that contains 48g of NaCl in 250ml of solution.

*February 7, 2013*

**Organic chemistry**

ok. Thank you so much for your help.

*February 6, 2013*

**Organic chemistry**

Well .4ml of ethyl acetate, But then it tells you to to .4 ml pf ligroin

*February 6, 2013*

**Organic chemistry**

So if ethyl acetate was the solvent, then what was the ligroin used for?

*February 6, 2013*

**Organic chemistry**

A diels-Alder reaction of cyclopentadiene with Maleic Anhydride experiment was conducted in lab. But I was wondering why we added ligroin to the maleic anhydride and ethyl acetate. I know ligroin can be used as a solvent and it is also nonpolar, though ethyl acetate is also a ...

*February 6, 2013*

**math**

input/output 0 0 2 0 6 0 8 0 -3 -6 -4 -8

*February 6, 2013*

**chemistry**

a 0.25 mol sample af neon gas at 18 C and 0.700 atm is heated to 40 C. the new gas pressure is 1.11 atm. what is the change in volumn of the neon gas?

*February 4, 2013*

**english**

Howard likes birds. simile or not simile?

*January 30, 2013*

**ss**

What was the significance of the court case of Plessy vs. Ferguson

*January 29, 2013*

**Math**

f(x)=x+4; f(x^2), (f(x))^2

*January 28, 2013*

**Analytical Chemistry**

The question: The pH of a solution is defined as pH = -log[H3O+]. If the pH of a solution is 3.72(+/- 0.03), what is the [H3O+] and its absolute standard deviation? Answer: How would I carry this out? I know to find the hydronium concentration wouldn't i just take e^3.72? ...

*January 28, 2013*

**6th grade math**

I read 1/5 of a book Monday. plan to read 1/10 everyday after that. how many days will the book be finished?

*January 28, 2013*

**precal**

If the half-life of a certain radioactive substance is 2000 years, estimate how many years must elapse before only 35% of the radioactive substance remains?

*January 22, 2013*

**algebra 1**

3v-4

*January 19, 2013*

**math 209**

find the value of annuity for a 1=$3000, I=0.09, n= 25

*January 15, 2013*

**its urgent math i need the answer fast**

Fist what is a better buy

*January 14, 2013*

**its urgent math i need the answer fast**

Price: 5.49 Unit Rate: 0.04 Price: 1.50 Unit Rate: 0.02 how much would you save in one year?

*January 14, 2013*