Thursday

May 26, 2016
Total # Posts: 158

**Chemistry-pH problem**

If a weak acid has a dissociation constant of 6.4 x 10(-6), what is the pH of a solution of this acid in 0.10 molar concentration?
*December 13, 2010*

**Chemistry-Confused by titration!!**

If a 28 mLs of a 0.25 molar NaOH solution is used to titrate 14 mLs of a nitric acid to its phenolphthalein endpoint, what is the molar concentration of the acid?
*December 13, 2010*

**Math**

Can 252/1663 be simplified? If it can be simplified, what is the new simplified fraction?
*November 22, 2010*

**math 11**

Please help this question is from my unit on linear programing and I'm having trouble completing it. A company manufactures bicycles and tricycles. The total number of frames the company manufactures cannot exceed 80 per month. It takes the company 1 hour to assemble a ...
*November 16, 2010*

**math (linear programing problem)**

Please help this question is from my unit on linear programing and I'm having trouble completing it. A company manufactures bicycles and tricycles. The total number of frames the company manufactures cannot exceed 80 per month. It takes the company 1 hour to assemble a ...
*November 16, 2010*

**AP Physics**

Jean, who likes physics experiments, dangles her watch from a thin piece of string while the jetliner she is in takes off from Dulles Airport (Fig. 4-55). She notices that the string makes an angle of 24° with respect to the vertical while the aircraft accelerates for ...
*November 14, 2010*

**AP Physics**

An 18.0 kg box is released on a 35.0° incline and accelerates down the incline at 0.269 m/s2. Find the friction force impeding its motion. How large is the coefficient of friction?
*November 14, 2010*

**6th grade**

They are all on at different times. None retelevised
*November 4, 2010*

**6th grade**

There are 3 parades on Cable Tv in the morning, 2 in the afternoon and 4 at night. How Many different combinations of parades can Ty watch?
*November 4, 2010*

**math**

your welcome
*November 3, 2010*

**math**

3/16=x/96 96(3)=16x 288=16x 288/16=16x/16 x=18
*November 3, 2010*

**Math**

-5+r=2r+3 what does r equal
*November 2, 2010*

**physics**

A daredevil leaves the end of a ramp with a speed of 32.0 m/s if his speed is 29.8 m/s when he reaches the peak of the path, what is the maximum height that he reaches? how do i do thiss?
*October 23, 2010*

**physics**

A daredevil leaves the end of a ramp with a speed of 32.0 m/s if his speed is 29.8 m/s when he reaches the peak of the path, what is the maximum height that he reaches? how do i do thiss?
*October 23, 2010*

**physics**

Find the height from which you would have to drop a ball so that it would have a speed of 6.4 m/s just before it hits the ground.
*October 23, 2010*

**math11**

I have several questions similar to this one and was wondering if you could walk me through this one. I'm totally lost on how to do it. Paramecia reproduce by splitting in two. In a laboratory flask, a colony of paramecia had an initial population of 500. Each day, the ...
*October 19, 2010*

**physics**

One of the fastest recorded pitches in major-league baseball, thrown by Billy Wagner in 2003, was clocked at 101.0 mi/h. If a pitch were thrown horizontally with this velocity, how far would the ball fall vertically by the time it reached home plate, 60.5 ft away? how do i do ...
*September 30, 2010*

**Physics**

HOW DO I DO THIS? A daredevil is shot out of a cannon at 45.0° to the horizontal with an initial speed of 28.0 m/s. A net is positioned a horizontal distance of 51.0 m from the cannon. At what height above the cannon should the net be placed in order to catch the daredevil?
*September 30, 2010*

**Math**

Teaneck High had an enrollment of 11040 in 1985 and an enrollment of 12100 in year 1998. What is the predicted enrollment of Teaneck High in 2014 if we assume a linear model?
*September 24, 2010*

**Math (Algebra Grade 8)**

x=-6
*September 21, 2010*

**Biology (muscle response)**

Suppose you are asleep and the doorbell rings. You stumble to your feet and move toward the door, open it and speek with your visitor. Think of the many changes occurring in your body as you awaken and respond. How does the three types of muscle tissue help? I'm having ...
*August 14, 2010*

**Geometry**

I;m so lost with these questiona. Any help will be appreciated. 1. Find the area of a square if one side measures 27 centimeters. 2. Exactly how many cubic inches of air can a fully inflated basketball hold if its radius is 4.2 inches? Use Pi 3. How many cubic centimeters can ...
*July 21, 2010*

**economics**

p=.2 Q=1540
*July 9, 2010*

**Physics**

Find the height from which you would have to drop a ball so that it would have a speed of 6.4 m/s just before it hits the ground.
*July 1, 2010*

**Physics**

A hypothesis says the upper limit in frequency a human ear can hear can be determined by the diameter of the eardrum, which should have approximately the same diameter as the wavelength at the upper limit. Using the hypothesis what would be the radius of the eardrumfor a ...
*February 21, 2010*

**Pre-Calc (Follow-up with Bob Pursley)**

For the below problem, I solved it as you suggested and got k=.0486 When I did 300,000 = 122,000e^.0486t I got about 18.5 years for when the sewer system would need to be updated. Next, for how many people will the new system have to accommodate for the system to last 15 years...
*January 10, 2010*

**pre-calc**

The city planners of bakersfield, CA are studying the current and future needs of the city. The sewage system they have in place now can support 300,000 residents. The current population of the city is 180,000, up from 122,000 eight years ago. Assuming that the population will...
*January 8, 2010*

**scientist**

who was the greatest 20th century scientist?
*July 15, 2009*

**5th grade math**

$4.25 Was how much he made per hour
*April 15, 2009*

**math**

Farmer Brown had ducks and cows. One day she noticed that the animals had a total of 12 heads and 32 feet. How many of the animals were ducks and how many were cows?
*March 16, 2009*

**alegbra**

First find the slope, by using y2-y1/x2-x1,and then plug in either one of the ordered pairs into y=mx+b, to find b,the y-intercept. then plug in the slope for m and the y-intercept for b, and youve got it!
*March 16, 2009*

**1st grade**

Is this sentence correct Breakfast Is Served Between 6:30 AM & 10:30 AM
*March 13, 2009*

**1st grade**

I would agree that this is not first grade math at all. The only thing that I could come up with is a cube. I didn't learn anything like this when I was in first grade.
*March 13, 2009*

**math**

I need to know if the following are independent dependent or inconsistent, y=-3x+19 y=2x-1 y=-4x-7 y=3x
*November 17, 2008*

**math**

solve: perimenter of triangle perimeter is 12 meters determine values x, x+1, and x+2 x(x+1)+(x+2)=12
*November 5, 2008*

**Math**

Need help in solving 0.5b+3.4=0.2b+12.4
*November 3, 2008*

**algebra with pizzazz**

i have this work sheet right now, and i dont know the answer
*October 19, 2008*

**pre- algebra**

i have tried and i cant figure it out. why do you think i posted it on here?
*September 8, 2008*

**pre- algebra**

Use the digits 1-9 in order. Insert operation signs and grouping symols to get a value of 100.
*September 8, 2008*

**Math**

What are the like terms in the exprression 3ac = ab - ac = 2ab? Explain. Simplify the expression. Show your work.
*September 2, 2008*

**Math**

What are the like terms in this expression. 3ac + ab - ac + 2ab? Explain please?
*September 1, 2008*

**math**

thank you so much<3
*August 11, 2008*

**math**

which of the following represents a change from 32 to 40? a- an increase of 20% b- an increase of 25% c- an increase of 8% d- a decrease of 20% i dont want to know the answer to the question i would just like to know how to solve it. please help! thank you!!
*August 11, 2008*

**Econ**

For d) the text this question is from uses the formula i(home)=i(foreign)+[E(expected)+E]/E. Assuming the question is just meant to recall knowledge of the formula from earlier in the chapter: i(foreign) = (1/E)-1 and expected depreciation = 0.1.
*July 21, 2008*

**math riddle ALGEBRA WITH PIZZAZZ**

it has something to do with a swim coach or polo or water
*April 6, 2008*

**Algebra**

If your answer is 8 is zero of f(x), no we had this problem and that is not the answer if I remember
*April 3, 2008*

**History**

What is the best ways to organize a dbq and a thematic essay for the AP US Test?
*March 9, 2008*

**SOSE**

List reasons we should ban having non-native animals as pets (Australia)
*February 1, 2008*

**Information systems**

Exctly What are you asking??
*February 1, 2008*

**SOSE**

Why should we ban people from having non native animals as pets (Australia)
*February 1, 2008*

**Science**

Hi What Alkalis In The House ??? Ect. Gavasoon
*November 11, 2007*

**Algebra**

Solve the problem. A rectangle with width 2x + 5 inches has an area of 2x4 + 9x3 - 12x2 - 79x - 60 square inches. Write a polynomial that represents its length. I got x^3+2x^2-11x-12 inches. is this correct? I used long division.
*October 15, 2007*

**Algebra**

please help me with this question and check my answers. Solve the problem. A rectangle with width 2x + 5 inches has an area of 2x4 + 9x3 - 12x2 - 79x - 60 square inches. Write a polynomial that represents its length. ( I dont know how to solve this problem) Use synthetic ...
*October 15, 2007*

**math**

math you mow 1/3 of a lawn, and your sister mows 2/5 of the lawn. what is the area of the entire lawn? what is the length of the section left to mow? From 30 ft by width & 121 ft (1/3 in one box , 2/5 in the second box, what is the ft in the third box?
*September 17, 2007*

**Social Studies**

I need a table about Silver mining rise during the last five years. PLEASE post me where I can find a DECENT one. Thanks Maddy It looks as if what you need to do is learn how to conduct thorough and effective searches for yourself. That's what research is. You are ...
*May 11, 2007*

**biology**

What chemical fuel powers all cell activities? Since this is not my area of expertise, I searched Google under the key words "cell metabolism chemical" to get these possible sources: http://www.answers.com/topic/cell-metabolism I hope this helps. Thanks for asking.
*February 28, 2007*

**Math coin riddle need help please**

I have 56 coins consisting of nickels and quarters. The total value of the coins is $5.60. How many of each coin do I have? Algebra to the rescue... NN is number of nickles ND is the number of quarters. NN*.05 + ND*.25=$5.60 but NN + ND=56 two equations, two unknowns, solve. ...
*August 31, 2005*