Tuesday

September 1, 2015
Total # Posts: 2,313

**biochem**

The pKa of butanoic acid is 4.87. A student mixes 120 mL of 0.45 M butanoic acid with 50 mL of 0.3 M NaOH and adds water to give a final volume of 1 L. What is the pH of the final solution? Please show you work.
*August 31, 2015*

** AP economics **

Explain how each of the following people would talk about scarcity and trade-offs the president of the United States, the leader of a developing nation, a US citizen whose income is in the top 1% and US citizen whose income is in the bottom 5%
*August 26, 2015*

**PSY 202**

According to a 2011 report that is explained in our textbook, which of the following is one of the four overriding obstacles to gender equity in the workplace?
*August 26, 2015*

**algebra**

wright the slope-intercept formof the equation of each line given the slope and y- intercept slope=4/5, y-intercept=2
*August 19, 2015*

**Math 157**

Find the prime factorization of 33^5*39*25^12 Thanks!
*July 31, 2015*

**MTH 157**

Thank you!
*July 31, 2015*

**MTH 157**

A company will need $50,000 in five years for a new addition.To meet this goal the company deposits the money in an account today that pays 4% annual interest compounded quarterly. Find the amount that should be invested to total $50,000 in 5 years. Thanks for the help!
*July 31, 2015*

**Math**

What is the greatest prime you must consider to test whether 7356 is prime?
*July 26, 2015*

**psychology**

* Does life really start in prenatal development? * Who are the actual individuals involved in the prenatal stage of development?
*July 17, 2015*

**research paper**

am i doing it correctly ?? Importance & benefits of stretching & warm-up exercises: Warm-up is exercising at a lower intensity in order to get the blood circulating and let your body know that you are preparing for exercise. While Stretching is an exercise designed to extend ...
*July 13, 2015*

**research paper**

Can anyone help me in writing a research paper on the importance & benefits of stretching & warm-up exercises
*July 13, 2015*

**Statistics**

Thank you!!!!!
*July 9, 2015*

**Statistics**

Is my question to vague? I am an older college student struggling to do statistics with no algebra background!!
*July 9, 2015*

**Statistics**

Police stopped 527 drivers. Of those stopped, 298 were ticketed. Of those 298, exactly 127 were cited for more than one violation. Estimate the probability that a driver who was stopped got a ticket. Which way is the correct one? 1/527=.0018 or 1/298=.003 Or am I way off?
*July 9, 2015*

**Algebra**

Could someone just double check my work sqrt280x^6/sqrt7x I got 2x^3 sqrt10\sqrtx Also 1/5(30y+40)+2/3(9y-27)=18 I got 7/3
*July 9, 2015*

**Statistics**

If 67% of cars have automatic tranny's & 8 cars are selected at random what is the probability that fewer than 4 have an automatic tranny
*July 8, 2015*

**algebra**

Solve ln(x+8) + ln(x-8) =0.
*July 2, 2015*

**algebra**

Solve 14 - ln(2-x)=0. solve for x -ln(2-x)=-14 ln 1/(2-x)=-14 1=-14(2-x) 1=-28+14x 29=14x 29/14=x not sure where I'm going wrong
*July 1, 2015*

**algebra**

Solve 10* 2^{4 x -5} = 41 so 2^{4x-5}=41/10 ln 2 * {4x-5}= ln 41/10 ln 4.1 +5/ ln 2 not sure what I'm doing wrong Thanks
*July 1, 2015*

**math**

I have a question I would really appreciate the answer. If 15% of my grade is 74% and 96 is 15% of my grade and 40% of my grade is a 60.5% without the final counting for 30% what is my grade? Please help thank you.
*June 26, 2015*

**algebra**

Find all rational zeros of the polynomial function P(x)=x^4 + 2 x^3 - 13 x^2 + 4 x - 30. Enter the rational zeros in a comma separated list. If there are none, enter "none". -3| 1 2 -13 4 -30 -3 15 -6 30 1 -5 2 -10 0 so (x+3)(x^3-5x^2+2x-10 so 5| 1 -5 2 -10 5 0 10 1 ...
*June 23, 2015*

**algebra**

Find all zeros of the polynomial function P(x)=x^4 + 2 x^3 - x^2 - 2 x . If there is more than one zero write them separated by commas. x=
*June 23, 2015*

**Algebra**

Let f(x)=(x-3)^2(x - 9). The y-intercept is y= ?-81 or -15 The x-intercepts are x= ?0,3 The end behavior on the right is ?even so + (enter "+" for rises, "-" for falls) The end behavior on the left is ?positive so + (enter "+" for rises, "-&...
*June 20, 2015*

**algebra**

Solve | 4 x+ 4 | = 3. Enter your solutions in a comma-separated list. x = I came up with -1/4 which is wrong
*June 19, 2015*

**algebra**

Solve \sqrt{10-x} + x=8. Enter your solutions in a comma-separated list. I used the quadratic formula and ended up with-127+-(-215)/2
*June 19, 2015*

**algebra**

Solve 2 x^2 + 3 x - 6 = 0. The solutions are x_1 = and x_2 =
*June 16, 2015*

**Algebra**

In interval notation what is 20-|7x+1|>=6
*June 16, 2015*

**Algebra**

In interval notation what is |7-8x|<10
*June 16, 2015*

**Science**

Two 20.-newton forces act concurrently on an object. What angle between these forces will produce a resultant force with the greatest magnitude? (1) 0° (2) 45° (3) 90.° (4) 180.°
*June 12, 2015*

**physics**

If the force of the explosion was focused onto a smaller ___________ of the window, then the pressure of the explosion on the window would be even greater.
*June 11, 2015*

**Algebra**

Let \ f(x) = 16 - x^2. Compute the average rate of change of f(x) on each interval. (a) [0,2] (b) [2,4] (c) [0,4]
*June 9, 2015*

**Algebra**

The equation of the line that goes through the point ( 2, 5 ) and is parallel to the line going through the points ( -2 ,4 ) and ( 6 ,2 ) can be written in slope-intercept form y = mx+b with: m = b =
*June 9, 2015*

**Algebra**

An equation of a line through (-3, -6) which is perpendicular to the line y=-5 x +3 has slope: I know the slope is 1/5 having problem with y-intercept is
*June 9, 2015*

**algebra**

What is x/(x-5)-3=5/(x-5) I came up with 5 but that is undefined
*June 8, 2015*

**Algebra**

Use the above graph of f(x) to complete the following table for values of its inverse function, f^{-1}(x). The graph has a point on (2,2)the y-intercept is 4 the x intercept is 3 x =-4, 8, 0, -2, 2 f^{-1}(x) Note: You can earn partial credit on this problem...
*June 7, 2015*

**algebra**

if f(x)=10x+7/6x+3 what is the f inverse
*June 7, 2015*

**algebra**

if f(x)=square root of x-4 what is f inverse I came up with x^2+16
*June 7, 2015*

**Chemistry 12**

I thought we only add the first two because the first one was purposely overshot? 0.5M NaOH × 12.56666667= 6.283333333 =6.3 moles Thank you for replying!
*June 2, 2015*

**Chemistry 12**

Hi, I did the acid-base titration lab with HCl and 0.5M NaOH. I need to calculate the moles of NaOH from molarity of NaOH and the average volume used. My English isn't good but is it asking me to find the moles of NaOH using the molarity of NaOH and the average volume used...
*June 2, 2015*

**Science**

A plane is flying horizontally with speed 215 m/s at a height 2770 m above the ground, when a package is dropped from the plane. The acceleration of gravity is 9.8 m/s^2. Neglecting air resistance, when the package hits the ground, the plane will be _________. Can anyone ...
*June 1, 2015*

**Algebra**

If(x)=4*absolute value of x-7 what is f(x+1)I have tried many ways and do not understand what to do with the x+1.
*May 29, 2015*

**science**

What happens when a warm humid air mass meets a cold dry mass?
*May 27, 2015*

**Chemistry check my answers **

Please check my answers For each of the 7 reactions in this experiment, write a balanced equation and classify it as a synthesis, decomposition, single replacemnt, neutralization, or double replacement reaction. Reaction 1 1)Adjust a burner flae to high heat 2)using crucible ...
*May 25, 2015*

**Business Statistics**

The Bureau of Labor Statistics’ American Time Use Survey showed that the amount of time spent using a computer for leisure varied greatly by age. Individuals age 75 and over averaged 0.30 hour (18 minutes) per day using a computer for leisure. Individuals ages 15 to 19 ...
*May 5, 2015*

**health**

Healthy pregnant and postpartum women should get at least ________ of moderate-intensity aerobic activity a week.
*May 5, 2015*

**Computer Science**

Create a program that allows a user to select one of the following four menu options: a. Enter New Integer Value b. Display Pointer Address c. Display Integer Address d. Display Integer Value For this program you will need to create two variables: one integer data type and one...
*May 4, 2015*

**Science**

On what sides does a "bulge" in the earth's oceans appear on the earth?
*May 3, 2015*

**Physics Help Please**

Scientists at Oak Ridge National Laboratory confirmed the existence of element 104 by creating 3000 atoms of it. If radioactive decay caused the number of atoms to drop by half within 4.0 s, how many atoms were left after 12 s? Show work please! Thank you!
*May 2, 2015*

**social studies**

for revolutionaries like sam adams,the term------embraced a way of life, a core ideology, and an uncompromising commitment to liberty and equality
*May 2, 2015*

**chemistry**

Write the balanced net ionic equation for the following reaction and determine the conjugate acid-base pairs. HNO3(aq)+Li2CO3(aq)<--->LiNo3(aq)+LiHCO3(aq) Which component in the net ionic equation is the acid, the base, the conjugate base, and the conjugate acid Thank ...
*April 30, 2015*

**chemistry **

CH4 (g) + 2 O2 (g) --> CO2 (g) + 2 H2O (g), (triangle)H rxn =-802.3 kj How much heat is produced by the complete combustion of 237 g of CH4?
*April 29, 2015*

**chemistry**

Write the balanced net ionic equation for the following reaction and determine the conjugate acid-base pairs. HNO3(aq)+Li2CO3(aq)<--->LiNo3(aq)+LiHCO3(aq) Which component in the net ionic equation is the acid, the base, the conjugate base, and the conjugate acid Thank ...
*April 29, 2015*

**chemistry**

Write the balanced net ionic equation for the following reaction and determine the conjugate acid-base pairs. HNO3(aq)+Li2CO3(aq)<--->LiNo3(aq)+LiHCO3(aq) Which component in the net ionic equation is the acid, the base, the conjugate base, and the conjugate acid Thank you
*April 29, 2015*

**math **

35 percent of the total length of the screen at the movies is 51.8 feet. What is the total length of the screen? Please give full details.
*April 28, 2015*

**MATH**

35 PERCENT OF THE TOTAL LENGTH OF THE SCREEN AT THE IMAX IS 51.8 FEET. wHAT IS THE TOTAL LENGTH OF THE SCREEN?
*April 28, 2015*

**MATH**

IF THE LOAN IS FOR $18000 AND THE INTEREST RATE IS 6.5%. iF THE INTEREST PAID IS $4680.0 HOW MANY MONTHS IS THE LOAN FOR?
*April 28, 2015*

**chemistry**

In a 1.00 L container at 272 degrees C 1.3 mol of N2 and 1.65 mol of H2 are added at equilibrium 0.100 mol NH3 is present calculate the equilibrium concentrations of N2 and H2 2NH3(g)<-->N2(g)+3H2(g)
*April 24, 2015*

**Pschology 202**

True or False? According to the textbook, occupational achievement is a newer phenomenon for women than for men.?
*April 23, 2015*

**Chemistry**

2H2S(g)+3O2(g)<-->2SO2(g)+2H2O SO2(g)+Cl2(g)<-->SO2Cl2(g) I balanced so how do I find the overall equation
*April 20, 2015*

**differniate**

f(x)= (12x-18x^4+3)/(5ã6x^2-11x^4+2)
*April 20, 2015*

**Science**

*Round answer to 2 decimal places.*
*April 15, 2015*

**Science**

A student is walking at 3.3 meters per second along a straight sidewalk. At a time of 6.8 seconds his position is at 19.7 meters right of the starting point. Later, the student is 52.5 meters to the right of the starting point. What was the time that the student walked to get ...
*April 15, 2015*

**chemistry**

d(g)--->3/2 e(g)+5/2 f(g) when e increases by .25 mol/l*s how fast is f increasing
*April 14, 2015*

**science**

how many seconds does it take for Mercury to go from 0 degrees Celsius to 300 degrees Celsius? 1. 5 seconds 2. 10 seconds 3. 30 seconds 4. 357 seconds
*April 8, 2015*

**Algebra**

12. Determine if the following is a conjuction or disjunction. y + 4 < -1 or y + 2 > 8 (Points : 1) 13. State how you determined if the combination above was a conjunction or disjunction. (Points : 2) 14. Solve the problem. (Hint: You should have two answers). y + 4 <...
*April 7, 2015*

**Statistics**

In the past year, Jack's Pizaa Resturant grossed more than $1500 a day for about 83% of its business days. Suppose 8 days are randomly selected, approximate the probablity that exactly 6 days will gross more than $1500 in a day.
*March 31, 2015*

**chemistry**

what is the delta Hvap of a liquid that has a vapor pressure of 612 torr at 77.6 degrees C and a boiling point of 94.9 degrees C at 1 atm
*March 29, 2015*

**chemistry**

What is the delta Hvap of a liquid that has a vapor pressure of 612 torr at 77.6 degrees C and a boiling point of 94.9 degrees C at 1 atm
*March 29, 2015*

**chemistry**

What is the delta Hvap of a liquid that has a vapor pressure of 612 torr at 77.6 degrees C and a boiling point of 94.9 degrees C at 1 atm
*March 29, 2015*

**chemistry**

What is the delta Hvap of a liquid that has a vapor pressure of 612 torr at 77.6 degrees C and a boiling point of 94.9 degrees C
*March 29, 2015*

**fluid mechanics**

A dam has been constructed of a large cylindrical pipe 10ft in diameter an 3ft long. Calcualte the net vertical and horizontal components of the fluid(water) force on this dam.
*March 22, 2015*

**fluid mechanics**

A dam has been constructed of a large cylindrical pipe 10ft in diameter and 3ft long. Calculate the net vertical and horizontal components of the fluid(water) force on this dam.
*March 22, 2015*

**chemistry**

A proton in a linear accelerator has a de Broglie wavelength of 138pm . What is the speed of the proton?
*March 20, 2015*

**economic**

1) Explain the meaning of the notation [a, b, r, w] used in Bayes Theorem 2) Explain how the (r, w) probabilities determine the quality of information: for perfect, worthless, and imperfect better than pure chance information
*March 19, 2015*

**Finance**

As an investor, you are considering an investment in the bonds of the Conifer Coal Company. The bonds, which pay interest semiannually, will mature in 8 years, have a coupon rate of 9.5% on a face value of $1,000. Currently, the bonds are selling for $872. a. If you required ...
*March 10, 2015*

**chemistry**

how many liters of SO2 measured at STP are produced in the reaction of 6.27 kilogrrams with 234 Liters of O2 at 220 degrees celsius and 2 atm?
*March 8, 2015*

**Math**

Help plzzzz😖😖😖😖😖
*March 2, 2015*

**Math**

Sam rolls a strike in 6 of the 10 frames of bowling What is the experimental probability that Sam will roll a strike in the first frame of the next game ? Explain why a number cube would not be a good way to simulate this situation Please help !!!!😖
*March 2, 2015*

**math**

The coach uses a scale drawing of the soccer field. the diagram uses a scale of 1/4 inches : 30 feet.What are the actual dimensions? What is the length and width of the field? What us the area of the field?
*February 26, 2015*

**precalculas**

-x+4x-2 list all levels of concavity
*February 24, 2015*

**Phsyics**

How much heat is required to raise the temperature of a 4.1-kg block of steel by 64 K? (The specific heat of this steel is 450 J/kg · K.)
*February 18, 2015*

**science**

What effects or potential effects do technologically based communication modalities between patients and health carer providers and between health care providers only have on health care cost
*February 16, 2015*

**Physics**

Two objects of same material are travelling near you. Object A is a 1.5 kg mass traveling 13.5 m/s; object B is a 2 kg mass traveling 5 m/s. Which object would make you feel worse if you are hit by it? 1. B 2. A 3. Unable to determine 4. the same
*February 14, 2015*

**government**

what court hears specific cases?
*February 14, 2015*

**criminal investigations**

why advances are paramount to the historical evolution of criminal investigations
*February 11, 2015*

**Physics**

Please someone help me. This is due in 30mins
*February 9, 2015*

**Physics**

Using the conservation of momentum law.
*February 9, 2015*

**Physics**

How do I find the recoil velocity of the earth immediately after the popper popped?
*February 9, 2015*

**Physics**

A constant force is exerted for a short time interval on a cart that is initially at rest on an air track. This force gives the cart a certain final speed. Suppose we repeat the experiment but, instead of starting from rest, the cart is already moving with constant speed in ...
*February 6, 2015*

**ela**

Is there such a word as poetries?
*February 5, 2015*

**Algebra**

Sarah mixes cashews that cost $9.00 per pound with 50 lb of peanuts that cost $5.00 per pound. How many pounds of cashews should she mix to make a nut mixture that cost $6.50 per pound?
*February 4, 2015*

**Algebra 1B**

Explain and provide an illustrative example of factoring a trinomial.
*February 4, 2015*

**Algebra 1B**

Factor the following equation: 3y^3-9y^2+4y-12 Thanks for the help!
*February 4, 2015*

**Algebra 1B**

Find the Greatest Common Factor of: 6x^4-12x^3 Thanks for your help!
*February 4, 2015*

**Math**

.85km/s=m/min
*February 1, 2015*

**fin**

what are the reason behind m&a waves of the 1980 and 1990
*January 30, 2015*

**Math**

What is -a^-2 if a equals -5
*January 28, 2015*

**law**

how they can determine whether or not the jury's decision was right or wrong. Does it come down to matter of opinion by the judge? Is it biased? How does that work with posttrial motions.
*January 24, 2015*

**Law**

I need help understanding diversity of citizenship
*January 23, 2015*

**law/history**

when the supreme court makes a law is there a way to appeal their decision?
*January 23, 2015*