Tuesday

January 27, 2015

January 27, 2015

Total # Posts: 1,720

**Statistics**

20. A study involves measuring the number of days absent from work for 216 employees of a large company during the preceding year. As part of the results, the researcher reports, “The number of days absent during the preceding year (M = 9.21; SD = 7.34) was . . . .” ...
*September 17, 2011*

**ochem**

Predict a reasonable melting point of a mixture prepared by combining 25mg of biphenyl (mp=70-71C) with 75mg of acetyl salicylic acid (mp=138-140C). Answer should have temps in it.
*September 15, 2011*

**Physics-can anyone check my work?**

A particle starts from the origin with velocity 2i m/s at t = 0 and moves in the xy plane with a varying acceleration given by 2 (sq root t) where is in meters per second squared and t is in seconds. (a) Determine the velocity of the particle as a function of time. So I ...
*September 14, 2011*

**Physics**

A particle starts from the origin with velocity 2i m/s at t = 0 and moves in the xy plane with a varying acceleration given by 2 (sq root t) where is in meters per second squared and t is in seconds. (a) Determine the velocity of the particle as a function of time. So I ...
*September 14, 2011*

**math**

So there are 6 different grade levels with 3 classes in each. So 6*3 = 18 classes total. If there are approximately 27 children in each class, than 27*18 = ? your answer.
*September 14, 2011*

**Calculus II**

Find the volume of the solid obtained by revolving the graph of y= 6x sqrt (9-x^2) over [0,9] about the y-axis.
*September 14, 2011*

**math math**

How do you write the solution to represent the point if intersection?
*September 13, 2011*

**algebra 11**

How do you write the solution to represent the point if intersection?
*September 13, 2011*

**Math **

When using the elimination method does it matter which variable you choose to eliminate? How do you write the solution to represent the point if intersection? I guess it doesnt matter
*September 13, 2011*

**sociology **

It needs to be formal.
*September 12, 2011*

**sociology **

I am writing an essay about my unique,distinctive and universal characteristics. I started my into and i was wondering if someone good proof read for an errors. Thank you
*September 12, 2011*

**physics**

A person walking with a speed of 1.44 m/sec releases a ball from a height of h = 1.28 m above the ground. Use the point on the ground, directly below where the ball is initially released at the origin of your coordinate system. (a) What is the ball's position at 0.25 ...
*September 11, 2011*

**Siddhartha**

Why was the ferryman, Vasudeva so important in the book Siddhartha?
*September 11, 2011*

**physics**

when the shuttle bus come to a sudden stop to avoid hitting a dog, it decelerates uniformly at 4.6 m/s^2 as is slows from 8.2 m/s to 0 m/s. How long does it take for the acceleration for the bus. Answer in units of s
*September 6, 2011*

**Physics**

A car moving with a constant acceleration covers the distance between two points 80 m apart in 8.0 s. Its velocity as it passes the second point is 14 m/s.How far behind the first point was the car at rest?
*September 5, 2011*

**Physics**

Police find skid marks 66 m long on the highway showing where the car made an emergency stop. Assuming that the acceleration was -10 m/s2 (about the maximum for dry pavement), how fast was the car going?
*September 5, 2011*

**Physics**

When would instantaneous speed be the same as average speed? would it be when the speed is constant? when the position changes linearly with time or would it be in the limit when the time interval goes to zero? I thought it would be when the speed is constant, but i'm not ...
*September 5, 2011*

**Physics**

When would instantaneous speed be the same as average speed? would it be when the speed is constant? when the position changes linearly with time or would it be in the limit when the time interval goes to zero? I thought it would be when the speed is constant, but i'm not ...
*September 5, 2011*

**statistics**

One year, professional sports players salaries averaged 1.6 million with a standard deviation of .7 million. Suppose a sample of 100 major league players was taken. Find the approximate probability that the average salary of the 100 players exceeded 1.1 million.
*September 4, 2011*

**PreCal**

x^2+y^2-4x-12y+31=0
*September 3, 2011*

**Math Algebra**

f(x)=x^3+4 f=1, f=-1 Are the answer to this 5 and 3 I must not understand
*September 2, 2011*

**math **

f(x)=x^3+4 f=1, f=-1 would the answer be 5 and 4? help Thought I knew this
*September 2, 2011*

**math **

Function M described by M(x)= 3x+16 can be used to predict the circumference of the waist of a male in x inches who is obese . Predict the circumference of a male’s waist whose inches are 49 would this be 3(49)+16=163 I hope I did this right
*September 2, 2011*

**math **

You deposit $2200 in an account that pays 3% annual interest. After 15 years, you withdraw the money, what is the balance if the interest is compounded quarterly? so I figure you would get 2650.00 help please
*September 2, 2011*

**math **

So is the function, f(x)= 2x²- 3x + 4 linear or nonlinear? Find f(-3) and f(3) for this function. I have the answer f(x)= 2(3)²- 3(3) + 4 =29 and f(x)= 2x²- 3x + 4 =49 I hapo this is correct and this is non linear?
*September 1, 2011*

**math **

What are three points that you can plot to graph the function f(x)=2x²- 5? I dont understand this
*September 1, 2011*

**Math Graphs**

If you were going to graph this function what would be the coordinates of the points that you would plot? Is this a linear or nonlinear function? Explain. f(x)= 2x+5 inputs (5) and (8) f(8)= 2(8)+5=16+5=21 f(5)= 2(5)+5=10+5=15 Would the points be (5,15) and (8,21)?
*September 1, 2011*

**math **

If you were going to graph this function what would be the coordinates of the points that you would plot? Is this a linear or nonlinear function? Explain. f(x)= 2x+5 inputs (5) and (8) f(8)= 2(8)+5=16+5=21 f(5)= 2(5)+5=10+5=15 Would the points be (5,15) and (8,21)?
*September 1, 2011*

**Math **

Thank you I think I forgot to sqaure and cube the first time.
*September 1, 2011*

**Math **

Then when I use five it iwould be the same way 25+10^3=46656
*September 1, 2011*

**Math **

y=(x^2+10)^3 using 4 and 5 would the answer be 4 and 7?
*September 1, 2011*

**math**

A fisherman had to be at an appointment at 10:30. He went fishing at 7:00 and was 20 miles from the boat dock. If the fisherman's boat goes 80 miles per hour,what time will he reach the dock if he left at 9:30 from his current position?
*August 30, 2011*

**math**

f(x)= 2x+5 inputs (5) and (8) So would the answer be 15 and 21
*August 30, 2011*

**Math **

An example of a nonlinear function would be f(x) = 2x² + 3. What do you think makes it a nonlinear function? Is this because when itis graphed it would curve instead of make a straight line?
*August 30, 2011*

**Math**

do I have the right answers? f(x) = (5 - x)² Find f(2) and f(-2) I end up with 24 on both equations
*August 30, 2011*

**calculus (PLEASE HELP!)**

f(x)=((x+1)^3)-2 1. Describe the long term behavior of this function. Give the power function that f resembles. 2. Determine the number of turning points f has.
*August 30, 2011*

**math**

68 810 116
*August 29, 2011*

**math **

would the answer be 5/3? 5divided by 5-2 is 3 5/3 the answer?
*August 29, 2011*

**math **

what is the answer to f(x)=5/(x-2) if f(5)?
*August 29, 2011*

**algebra**

Can someone help me Create an equation of a nonlinear function and provide two inputs for your classmates to evaluate.
*August 29, 2011*

**math**

is it 15 yards
*August 29, 2011*

**Calculus**

infinite not infamous my bad :)
*August 22, 2011*

**Calculus**

Find the points of intersection for y=e^x and y=sin(2x). are there an infamous (sp?) number of points of intersection for these equations?
*August 22, 2011*

**Chemistry**

How many milliliters of a 0.1 Molar NaOH solution is needed to neutralize 1 liter of lemonade containing 25% citric acid?
*August 5, 2011*

**world history**

During the fourteenth century, Japanese women of aristocratic rank
*August 2, 2011*

**Math**

The length of a rectangle is 6 inches less than 3 times its width. Find the dimensions of the rectangle if its area is 45 square inches.
*July 27, 2011*

**Chemistry**

an electron has an uncertainty in its position of 552 pm. what is the uncertainty in its velocity?
*July 25, 2011*

**AP Bio (but its a question about chemistry)**

no idea how to do this... describe how you would prepare from the specified stock solution: 400 mL of 0.45 M urea starting with a 6 M urea stock solution
*July 24, 2011*

**AP Bio (but its a question about chemistry)**

i have no idea how to do this! Calculate the volume of the specified titrant required to neutralize 35 ml of .4 M NaOH. Titrant: 0.75 M H2SO4 [2NaOH + H2SO4 „» 2H2O + Na2SO4]
*July 24, 2011*

**Chemistry**

What mass of water, in grams, would have to be decomposed to produce 25.1 L of molecular oxygen at STP?
*July 22, 2011*

**Chemistry**

4 FeS(s) + 7 O2(g) ==> 2 Fe2O3(s) + 4 SO2(g) 7.82 moles of FeS are required to produce 3.91 moles of Fe2O3 What is the maximum number of liters of Fe2O3(s) that can be made from 10.95 L of O2(g) and 18.64 L of FeS(s) at STP?
*July 22, 2011*

**Chemistry 101 college**

you have 10 mL of a 1.0 M Ba(OH)2 solution and add it to 2.5 L of water. What is the concentration of hydroxide ionsin the diluted Ba(OH)2 solution?
*July 19, 2011*

**Chemistry 101 college**

How many grams of chloride ions are in a 2.5L of a 1.0 M calcium chloride solution?
*July 19, 2011*

**Chemistry 101 college**

you have 10 mL of a 1.0 M Ba(OH)2 solution and add it to 2.5 L of water. What is the concentration of hydroxide ionsin the diluted Ba(OH)2 solution?
*July 19, 2011*

**Calc 3**

intersect x^2+y^2=36-8x^2-8y^2
*July 13, 2011*

**physics**

Number of beats heard per second = 15/5 = 3 beats/sec. We know number of beats heard per second = difference in frequency of the two sound waves. So 3 = 440 - fp, where fp is the frequency of the piano key which is slightly lower than 440 Hz. Solving for fp, we get fp = 337 Hz.
*July 9, 2011*

**math**

what is the arithmetic average of the following numbers: 16, 35, 42, 57, and 60?
*July 5, 2011*

**geometry**

In rectangle ABCD, if the coordinates of A are (0, 0) and the coordinates of C are (r, s), what are the coordinates of B.
*July 5, 2011*

**Chemistry**

PLease help how many grams of potassium chlorate decomposes to potassium chloride and 638 mL of O2 at 128°C and 752 torr? the formula given: 2KClO3(s) 2KCl(s) + 3O2(g)
*July 5, 2011*

**chem**

how many grams of potassium chlorate decomposes to potassium chloride and 638 mL pf o2 at 128°C and 752 torr? 2KClO3(s) 2KCl(s) + 3O2(g)
*July 5, 2011*

**geometry**

In parallelogram ABCD, A (0,0),B(a,b)and D(c,0)are three of it's vertices, what are the coordinates of C in terms of a,b,c
*July 4, 2011*

**geometry**

In parallelogram ABCD, A (0,0),B(a,b)and D(c,0)are three of it's vertices, what are the coordinates of C in terms of a,b,c
*July 4, 2011*

**geometry**

In parallelogram ABCD, A (0,0),B(a,b)and D(c,0)are three of it's vertices, what are the coordinates of C in terms of a,b,c
*July 3, 2011*

**geometry**

in an equilateral triangle RST, R has coordinates (0.0)and T has coordinate of (2a,0).Find the coordinates of S in terms of a.
*July 3, 2011*

**Algebra 2**

In(e^16x)=8 Solve for x.
*June 29, 2011*

**algebra**

The number of computers sold by BCC depends on the dollar amound,x, that they spend on advertising. How much must they spend to sell 200 computers? Round to the nearest dollar and do not include units in your answer. N(x)=100+20 * In(0.25x)
*June 29, 2011*

**Physics**

The gauge pressure at the bottom of a vertical tube (open to the atmosphere) filled with mecury is 100kPa. How high is the column of mecury in the tube? I used the formula pressure=density * gravity * height which i reaaranged to find h= 100000Pa/(13570kg/m3*9.8)=0.75m but ...
*June 15, 2011*

**chemistry**

-7.81 × 103 kJ/mol
*June 14, 2011*

**maths**

simply fully sp to the power 4 divide by 10p to the power 3
*June 5, 2011*

**maths**

it just says work out the nth term for the those numbers
*June 5, 2011*

**maths**

what is the answer
*June 5, 2011*

**maths**

dont understand
*June 5, 2011*

**Math Probability**

3) For years, ocean going ships have been using colored flags for signaling. By changing the order of the colored flags, the ships can send out different signals. If most ships carry six flags (each of different colors) how many different signals are possible if... a) all six ...
*June 5, 2011*

**busness math**

A is better
*June 3, 2011*

**civics**

Cabinet members are nominated by the President and confirmed by Secretary of State House of Reps Senate Supreme Court is it Supreme Court?
*May 26, 2011*

**civics**

what was the major difference between Greek and Roman democracy? A The Romans elected people to run their govt B The Greeks had everyone who was eligible participate in govt decisions C Roman democracy included everyone while Greek democracy included only free, white men D ...
*May 26, 2011*

**Physics**

A runner travels 100 m in 10.9 s. Assume that it takes him 1.35 s to reach his top speed, which is then maintained for the rest of the race. Find the following values: a) acceleration during the first 1.35 s b) maximum speed
*May 26, 2011*

**english**

For Grapes of Wrath and the American Dream, how did the setting affect the characters vision of the dream? Is it sort of brutal because there was starvation, poverty, and death?
*May 25, 2011*

**english**

How does the valley of ashes give a vision of the American Dream? Is it like that it showed prosperity?
*May 25, 2011*

**english**

How did the settings of The Great Gastby and Grapes of Wrath affect the characters' version of the American Dream?
*May 24, 2011*

**Chemistry (Electrons in Atoms)**

are the units for energy J*s
*May 23, 2011*

**Chemistry (Electrons in Atoms)**

The wavelength of visible light varies from 0.40 μm to 0.70 μm as the color of the light changes from violet to red. Calculate the energy of a photon whose wavelength is 0.67 μm HINT: From the wavelength and the speed of light, we can get the frequency. Then the...
*May 23, 2011*

**Chemistry (Electrons in Atoms)**

is the answer 780373.3333
*May 23, 2011*

**Chemistry (Electrons in Atoms)**

What is the wavelength of the emitted photon, when the electron in the hydrogen atom makes a transition from the ni = 5 state to the nf = 3 state?
*May 23, 2011*

**Civics (The American President Movie)**

In the movie the American Dream President Andrew Shepard (Michael Douglas) shows the roles of the President. What are examples of him being 1. Chief of State 2. Chief Executive 3. Chief Adminstrator 4. Chief Diplomat 5. Commander in Chief 6. Chief Legislator 7. Chief of Party ...
*May 23, 2011*

**Physics**

i mean 80 microfarads
*May 22, 2011*

**Physics**

How long will it take a charged 80-ìF capacitor to lose 20 percent of its initial energy when it is allowed to discharge through a 45 ohm resistor?
*May 22, 2011*

**physics**

Resistance in a Series Circuit lab: Determine the coded value of your resistors. (I found 270 ohms, 560 ohms and 750 ohms) ***Enter the toleranace value as indicated by the color of the fourth band. (all were gold) How do I find TOLERANCE VALUE of the gold band??? Thank you.
*May 19, 2011*

**physics**

three resistors of 10, 15, and 20 ohms are connected in parallel to a source of current. In which resistor is the current greatest How do I set this up?
*May 18, 2011*

**exp in math**

I see where I made a mistake thanks!
*May 15, 2011*

**exp in math**

convert 110010 to base 10 2 I'm not sure about this one is it 60 or 62 I did all the steps, but it seems like I'm still missing something
*May 15, 2011*

**exp in math**

convert 1100 two to base 10 I came up with 1100 2 = 12 is this correct?
*May 15, 2011*

**explorations in math**

the question reads covert the numeral to a numeral in base 10 2068 12
*May 15, 2011*

**explorations in math**

covert 2068 twelve to base 10
*May 15, 2011*

**explorations in math**

4.5 + 1.1 20 + 1 21
*May 15, 2011*

**explorations in math**

convert the numeral to a numeral in base 10 14 5
*May 15, 2011*

**Math**

1) use the M method to solve the following linear programming problem: Minimize C+ -5x+10x+15x Subject to 2x+3x+x <(or equal to) 24 x-2x-2x >(or equal to) 1 x,,x,x>(and equal to) 0
*May 14, 2011*

**Chemistry **

A solution contains an unknown amount of dissolved calcium . Addition of 0.112 mole of K3PO4 causes complete precipitation of all the calcium. How many moles of calcium were dissolved in the solution?
*May 14, 2011*

**Chemistry**

A solution contains 0.133 g of dissolved Lead. How many moles of soduim chloride must be added to the solution to completly precipitate all of the disolved lead? What mass of sodium chloride must be added?
*May 14, 2011*

**Calculus**

Give the domain of each of the functions listed below : a) f(x)= ln (tanh^-1 (x)) b) g(x) = cos ^-1 (e^x) I just don't know how to set them up to solve for x ...I'm doing a Calc course online on my own, and would really appreciate the help :) Thanks
*May 13, 2011*

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