Friday

April 29, 2016
Total # Posts: 1,019

**Chemistry**

imagine that you have a 100 ml of HCl, after adding 50 ml of 1M NaOH, how many moles of OH did you add
*April 29, 2013*

**Chemistry**

imagine that you have a 100 ml of HCl, after adding 50 ml of 1M NaOH, how many moles of OH did you add
*April 29, 2013*

**Math**

A quarter has a diameter of approximately 24 millimeters. What is the area of the quarter? Did I work this right? A= 3.14 (12) A=3.14 (144) A-452.16 mm Thanks
*April 26, 2013*

**math**

Jeff takes a loan of R25000 in a period of 5years calculate the interest rate?
*April 26, 2013*

**math**

9 fair coins are independently tossed in a row. Let X be the random variable denoting the number of instances in which a Head is immediately followed by a Tail during these 9 tosses. The variance of X has the form ab, where a and b are coprime integers. What is the value of a+b?
*April 18, 2013*

**math 4th grade**

then what do i do with 16/24 and 15/24
*April 16, 2013*

**math 4th grade**

how do you add 2/3 plus 5/8
*April 16, 2013*

**science**

calculate the time taken by a train to travel 1000m if its initial speed is 30m/s and it has an acceralation of 0.1m/s
*April 16, 2013*

**Chemistry**

DrBob222's answer is wrong. You mean to put Cd/Cd^2+ is -0.403, not 0.403. Answer is: 3Cd^2+(aq) + 2In(s) --> 3Cd(s) + 2In^3+(aq) this is right because the short hand notation is: In(s)|In^3+ (aq)||Cd^2+ (aq)|Cd(s) And the Anode is always on the left. ~Information valid...
*April 14, 2013*

**Math**

If (Y x 15+20=245), what does Y equal?
*April 14, 2013*

**Calculus**

Estimate the area under the graph of 25−x 2 from x = 0 to x = 5 using 5 left rectangles. b. Sketch for yourself the graph of f and the rectangles. Is this left sum an overestimate or underestimate? Enter OVER or UNDER. c. Now use 5 right rectangles to estimate the area. ...
*April 12, 2013*

**Math**

In 1800, the area of the United States was 891,364 square miles. After the Louisiana Purchase in1803,the area increased by about 93%. What was the area of the United States after the Louisiana Purchase? Round to the nearest square mile
*April 11, 2013*

**Calculus**

An animal population is increasing at a rate of 150+20t animals per year. By how much does the animal population increase between year 5 and year 8?
*April 11, 2013*

**Calculus**

An animal population is increasing at a rate of 150+20t animals per year. By how much does the animal population increase between year 5 and year 8?
*April 11, 2013*

**english**

Mrs. Jones said that we will have a fire drill at 8:45 on Thursday. I am confused is what she said in quotes and should the word that be taken out - the instructions says to correct sentence.
*April 9, 2013*

**english**

Sam and John are building a new house in Florida. is it house or home?
*April 9, 2013*

**english**

How many fish do you want to catch?" The fishing guide asked us. is the T in the capitalized
*April 9, 2013*

**math**

Wondering the answers to these: Find the value of each of the following. Leave your answers as fractions where appropriate. [I did these myself but need to answer-check] a) log[base4](1/8) b) 10^(-10log3) c) 2log[base3](9) d) log[base3](3)^(2x) ans: a) -3/2 b)(1/3)^10 c) 4 d)...
*April 7, 2013*

**chemistry**

What are the freezing point and boiling point of an aqueous solution of 15.5 g glucose(C6H12O6) dissolved in 150 g of water?
*April 7, 2013*

**chemistry**

How many grams of H2SO4 are contained in 4.5 L of .30N (N standing for normality) sulfuric acid? Help would be much appreciated.
*April 7, 2013*

**math**

Great this helps alot, was worried I screwed up something
*April 7, 2013*

**math**

The Question is: The value of a new car depreciates at a rate of 12% per year. 1)Write an equation to represent the approximate value of a car purchased for $23 000. 2)Determine the value of the car two years after it is purchased. 3)Approximately how many years will it take ...
*April 7, 2013*

**math**

Thanks, glad I can correct that!
*April 7, 2013*

**math**

One more question: Beginning with the function f(x) = (0.8)^(x), state what transformations were used on this to obtain the functions given below. a) g(x) = - (0.8)^(x) - 2 b) h(x) = (1/2) (0.8)^(x-2) c) k(x) = (0.8)^(-3x+9) These are the answers I have, (may be incorrect) a) ...
*April 7, 2013*

**math**

Wow thanks guys, perfect feedback. Much appreciated
*April 7, 2013*

**math**

Confused! So here is the question: Inflation is currently causing the cost of items to increase by about 2.5% per year. In 2009 a litre of gasoline costs approximately $0.90. What will it cost to fill a 60 litre gas tank 10 years from now. Round your answer to the nearest ...
*April 7, 2013*

**math**

Thank you very much.
*April 7, 2013*

**math**

An antique dresser was purchased for $7500 in 2005. The dresser increases in value by 9% per year. Find the value of the dresser in 2025. So i thought it would be : A = 7500(1+0.09)^(20) A = 42033... However I have been told it could be: Value = 7500 + 7500*0.09*20 = $21,000 ...
*April 7, 2013*

**math**

..?
*April 6, 2013*

**math**

1) A rancher wants to enclose two rectangular areas near a river, one for sheep and one for cattle. There is 240m of fencing available. Express the area of the enclosures as a function of its dimension. No there is no common side (lets say.) Thanks
*April 6, 2013*

**math**

1) A rancher wants to enclose two rectangular areas near a river, one for sheep and one for cattle. There is 240m of fencing available. Express the area of the enclosures as a function of its dimension. No there is no common side (lets say.) Thanks
*April 5, 2013*

**math**

No there is no common side (lets say.) Thanks by the way.
*April 5, 2013*

**math**

That is the question, it can be solved in multiple ways from what I understand.
*April 5, 2013*

**math**

1) A rancher wants to enclose two rectangular areas near a river, one for sheep and one for cattle. There is 240m of fencing available. Express the area of the enclosures as a function of its dimension.
*April 5, 2013*

**math**

it would be appreciated
*April 5, 2013*

**math**

This is for calculus and its a practice assignment. I need a how-to on solving these. Each answer must be a function.
*April 5, 2013*

**math**

1) A rancher wants to enclose two rectangular areas near a river, one for sheep and one for cattle. There is 240m of fencing available. Express the area of the enclosures as a function of its dimension. 2) A container company is designing on open-top, square-based, rectangular...
*April 5, 2013*

**CHM 0001**

Put some sample of the salt in a dry test tube, and heat. You will observed that water vapour is giving out which turn white copper sulphate blue. That shows that the salt contain some water of crystalization. Add distilled(5cm3) water to some of the sample into a test tube ...
*April 4, 2013*

**math**

Inflation is currently causing the cost of items to increase by about 2.5% per year. In 2009 a litre of gasoline costs approximately $0.90. What will it cost to fill a 60 litre gas tank 10 years from now. Round your answer to the nearest dollar. Name at least one thing other ...
*April 2, 2013*

**Statistics**

Hello. I would like to ask a college statistics question. Q. One hundred draws are made at random with replacement from the box [1,2,2,5]. The draws come out as follows:17 [1]'s, 54 [2]'s, 29 [5]'s. Fill in the blanks, using the options below; show work. (a) For ...
*March 28, 2013*

**Math**

What are five numbers that have a median of 71,300
*March 25, 2013*

**University of Ghana**

• A car moves 26 km due east then 14 km due north. It then turns along a path running north-west with 15 km, then 17 km due west. If the time for the entire journey is 2 hrs. • Find; • (a) the car’s average speed in m/s • (b) the car’s average ...
*March 23, 2013*

**geometry**

Please help what are the answers right now
*March 16, 2013*

**math 3rd grade**

Input X Output Y 1 1 3 9 5 25 write a rule for each function table 8x - 15 is this correct??? HELP
*March 13, 2013*

**calculus**

find the exact length of the curve y = ln(1-x^2), 0 <= x <= (1/2) So by doing the work I eventually get down to integral from 0 to 1/2 (1 + x^2)/(1-x^2) dx but I keep getting -1 + 1/(x-1) - 1/(x+1) after partial fractions which gives the answer ln(1/3) - 1/2 when I ...
*March 13, 2013*

**science**

what is the momentum of a 0.60 g bumble bee flying at 15km/h
*March 12, 2013*

**Social Studies**

Number 1 is actually D ok
*March 11, 2013*

**World Mythology**

Discuss what the Egyptian stories of Isis, Osiris, and Horus reveal about Egyptian culture and what The Enuma elish reveals about Babylonian culture. How, in particular, do their stories reflect the beliefs of their respective peoples?
*March 10, 2013*

**Statistics**

In the quiz in Exercises 1 and 2, the grading scheme is as follows: each right answer is awarded 5 points, and 1 point is taken off for each wrong answer. Recall that the quiz consists of 10 questions, and that in the class, the average number of right answers is 6.2 and the ...
*March 7, 2013*

**Statistics**

A quiz consists of 10 questions. Each question is marked either “right” or “wrong.” For each student in the class, the instructor keeps a record of the number of right answers the student got. In the class, the average number of right answers is 6.2 and the...
*March 7, 2013*

**Statistics**

A list of numbers has an average of 48 and an SD of 12. The list is transformed by subtracting 3 from each entry and then dividing the result by 5. (1) Find the average of the transformed list. (2) Find the SD of the transformed list.
*March 7, 2013*

**calculus**

Sorry I typed out the wrong answer. Why would I have 3 fractions though? Because it's x^2?
*March 2, 2013*

**calculus**

Integral of 10 / (5x^2 - 2x^3) Do not determine the numerical values of the coefficients. Just wanted to know why when I write out the form of the partial fraction decomposition there is A/x + B/x^3 + C/ (x^2 + 4) Why isn't it just A/x^3 + B/ (x^2 + 4)?
*March 2, 2013*

**Algebra 1**

Clearly show and explain each step for full credit. solve the inequality |4x-3|=5
*February 28, 2013*

**maths help**

The largest prime less than 100 is 97 so the largest four digit number with 3 factors is 97^2=9409.
*February 27, 2013*

**Chemistry**

Experimentaly discribe how to determine the formula of magnesium.
*February 24, 2013*

**calculus**

How is the integral of cos(2x) = sinxcosx?
*February 21, 2013*

**Physics**

Two negative charges each of unit magnitude and a positive charge q are placed along a straight line. At what value of q will the system be in equilibrium? Check whether it is stable, unstable or neutral equilibrium.
*February 16, 2013*

**Math**

Actual lengths of pregnancy terms are nearly normally distributed about a mean pregnancy length (of about 38-39 weeks) with a standard deviation of 15 days: about what percentage of births would be expected to occur within 15 days of the mean pregnancy length?
*February 12, 2013*

**Math**

.0279775281
*February 12, 2013*

**cherokee**

12.00*.25=3 so 12.00-3.00= sale price of $9.00
*February 12, 2013*

**calculus**

I'm talking about in a general sense. Let's say it's y = x^2 and y = 2x- x^2. Will it always be the upper bound curve that is the top one?
*February 3, 2013*

**calculus**

How do I tell which curve is the top/bot or right/left? I keep getting confused about this. Is it just the right/top most intersection and the bot/left most one?
*February 3, 2013*

**Chemistry**

For the reaction of hydrazine (N2H4) in water, Kb is 3.0 10-6. H2NNH2(aq) + H2O(l)--> H2NNH3+(aq) + OH-(aq) Calculate the concentrations of all species and the pH of a 1.6 M solution of hydrazine in water. [OH-] = [H2NNH3+] = [H2NNH2] = [H+] = pH =
*February 3, 2013*

**American History**

docs(DOT)google(DOT)com/file/d/0B3_sydO5xXRZOUpwTVZIbUdvNXM/edit I have to write a childrens book(3rd-4th grader) for a history project. I have to somehow incorperate/represent the cold war, containment, truman doctrine, domino theory, and korean war. I don't even have any...
*January 24, 2013*

**English**

Because of the lawyer's long experience in legal matters, we left it to his BLANK how to proceed with the case
*January 22, 2013*

**chemistry**

since 315g of Pb(NO3)2 is yielded 278g of PbCl2 hence, xg of Pb(NO3)2 would yield 9g of PbCl2 it can be represented as below; 315g Pb(NO3)2 = 278g of PbCl2 xg of Pb(NO3) = 9g of PbCl2 cross multiply x = 315g x 9g divided by 278g x= 10.197g therefore, 10.197g of Pb(NO3)2 would ...
*January 20, 2013*

**Geometry honors**

the endpoints of AB are a(-3,5) and b(9,15). find the coordinates of the points that divide AB into 4 congruent segments
*January 16, 2013*

**Physics**

For a certain transverse wave, the distance between two successive maxima is 1.82 meters and eight maxima pass a given point along the direction of travel every 14.2 seconds. Calculate the wave speed. Answer in units of m/s
*December 31, 2012*

**Physics**

is 41 degrees east of north the exact degree number??? because a computer program wants the exact number and i cant round over or under 1%...
*December 30, 2012*

**Physics**

An airplane ﬂies at airspeed (relative to the air) of 430 km/h . The pilot wishes to ﬂy due North (relative to the ground) but there is a 43 km/h wind blowing Southwest (direction 225◦). In what direction should the pilot head the plane (measured clockwise ...
*December 30, 2012*

**physics**

6 seconds
*December 23, 2012*

**english**

ok umm thanks....
*November 29, 2012*

**english**

what is the subject and verb phrase of "Go to the snack bar before the movie"
*November 29, 2012*

**algebra - absolute value**

it could be a no solution answer??
*November 29, 2012*

**math**

Please explain the order of operations for the formula 30 divided by 5 times 6 Do I do the multiplication first, or do I do the the operations from left to right?
*November 28, 2012*

**financial accounting **

eckman company purchased equipment for $80,000 on january 1,2011 and will use the double declining balance method of depreciation. it is estimated that the equipment will have a 5 year life and a $4,000 salvage value at the end of its useful life. the amount of depreciation ...
*November 19, 2012*

**Chemistry**

How many possible orbitals are there for n= 4?
*November 18, 2012*

**Chemistry**

Calculate the energy change associated with the transition of an electron from the n=2 shell to the n=5 shell in a Bohr hydrogen atom.
*November 18, 2012*

**math**

the width in cm of a rectangle is the same as the slope of the line 5x-6y=-14, and its length in cm is the same as the slope of the line that is perpendicular to the line 9x+4y=87. Find the perimeter of the rectangle.
*November 17, 2012*

**math**

the width in cm of a rectangle is the same as the slope of the line 5x-6y=-14, and its length in cm is the same as the slope of the line that is perpendicular to the line 9x+4y=87. Find the perimeter of the rectangle.
*November 17, 2012*

**math**

Find the equation of the line that passes through the points (2/3, -5/4)and (-3, -5/6). Write the answer in slope-intercept form and standard form with integer coefficients. Thank you.
*November 16, 2012*

**math**

If there are 8 boys and 9 girls in a classroom , what is the ratio of boys to girls ?
*November 6, 2012*

**History**

What made iroquois headwomen different from regular Iroquois woman
*November 3, 2012*

**mg495**

You learn that 25 percent of the cost of goods sold and operating expense figures for 2009 are fixed costs that will not change in 2010. Reconstruct the pro forma income statement.
*November 1, 2012*

**akgebra**

when do you reverse an inequality sign?
*October 31, 2012*

**CHEMISTRY**

Are you always solving for final volume in the combined gas law?
*October 23, 2012*

**Physics**

2. Contrast the metric units of distance, time, and speed. Describe the relationship between them.
*October 23, 2012*

**College Physics**

A uniform horizontal rod of mass M and length l rotates with angular velocity w (omega) about a vertical axis through its center. Attached to each end of the rod is a small mass m. Determine the angular momentum of the system about the axis. Write you're answer in terms of...
*October 20, 2012*

**English grammar **

"Will you lend me seven dollars for my lunch today? " asked Shannon. Is there a question mark after today or a comma
*October 18, 2012*

**finance**

a company paid dividend of $7 per share and has announced that it will increase the dividend by $4 per share each of the next 4 years and then never pay another dividend again. the required rate of return is 11 percent on the company's stock. How much will you pay today?
*October 17, 2012*

**algebra**

need the answers dumby
*October 15, 2012*

**physics**

An arrow is shot horizontally from a 50 m cliff with a velocity of 15 m/s. As the arrow travels in its parabolic path, its new height some time later, is 24 m. Calculate the instantaneous velocity of the moment it reaches is new height.
*October 15, 2012*

**Word study slash english**

What are some words with the ay slash igh sound
*October 7, 2012*

**english**

how would you divide the following verse of scripture: "For I have not shunned to declare unto you all the counsel of God." like this: For I have not shunned to declare unto you all / the counsel of God. or For I have not shunned to declare unto you / all the counsel...
*October 3, 2012*

**math**

but what about the quantity of cards in each pile? figuring out that each pile adds up to 50 is the easy part!
*October 2, 2012*

**Maths**

Keith and Shawn each have some money. If Keith spends $38, the ratio of the amount of money Keith has to the amount of money Shawn has will become 2:5. If Shawn spends $38, the ratio will become 8:13. How much money does each boy have?
*October 2, 2012*

**Maths**

The ratio of the number of cheesecakes to the number of mango cakes was 3:2. After Baker Lam sold 144 cheesecakes, the ratio became 3:5. A) How many cheesecakes did Baker Lam bake at first? B)Baker Lam decided to deliver the remaining cakes to 4 charity homes. How many cakes ...
*October 2, 2012*

**math**

Booty
*September 30, 2012*