Thursday

February 23, 2017
Total # Posts: 2,422

**physics**

Kelli weighs 392 N, and she is sitting on on a playground swing that hangs 0.4 m above the ground. Her mom pulls the swing back and releases it when the seat is 1.1 m above the ground. If Kelli moves through the lowest point at 1.5 m/s, how much work was done on the swing by ...

*April 23, 2013*

**accounting**

B 100000

*April 20, 2013*

**History**

4. What Reagan policy resulted in an increase in the federal budget deficit? *supply-side economics deregulation increased defense spending increased spending on social programs Thank You.

*April 19, 2013*

**3rd grade math**

What does 5 fracture each 1/2 mean?

*April 18, 2013*

**History**

Thanks. i figured it out. its high inflation.

*April 18, 2013*

**History**

4. Which of the following influenced the presidential election of 1980? high inflation low gas prices racial tensions *a war with Iraq Thank You.

*April 18, 2013*

**physics**

An 11-mm wide diffraction grating has rulings of 550 lines per mm. Light is incident normally on the grating. The longest wavelength that forms an intensity maximum in the fifth order is closest to? The correct answer is 488nm but I cant seem to get that answer.

*April 17, 2013*

**physics**

An 11-mm wide diffraction grating has rulings of 550 lines per mm. Light is incident normally on the grating. The longest wavelength that forms an intensity maximum in the fifth order is closest to? The correct answer is 488nm but I cant seem to get that answer.

*April 17, 2013*

**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*

**geometry**

6. Is D

*March 16, 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*