Saturday
July 4, 2015

Posts by Daniel


Total # Posts: 905

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
90
March 14, 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

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

math
a baseball diamond is actually a square. the distance between bases is 90 feet. when a runner on first base tries to steal second, a catcher has to throw from home to second base.how far is it between home and second base?
September 18, 2012

math
a 25 foot ladder leans against the wallit touches the wall 24 feet off the ground if you slide the base of the ladder back 10 feet off the ground how far does it slide down the wall?
September 13, 2012

math
im confused how do u get 7
September 13, 2012

math
but there is an extra number
September 13, 2012

math
a 25 foot ladder leans against the wallit touches the wall 24 feet off the ground if you slide the base of the ladder back 10 feet off the ground how far does it slide down the wall?
September 13, 2012

Chemistry
How many moles of H2PO4 and HPO4 would be needed to prepare 1.0 L of a 0.01M phosphate buffer with a pH of 6.82? Use the Henderson-Hasselbalch equation. pH = pKa + log (base)/(acid). Thank you, but I guess what my question should have been is what is the acid in this question ...
September 5, 2012

Chemisty
Thank you, but I guess what my question should have been is what is the acid in this question and what is the base. I would assume that both H2PO4 and HPO4 are acids and phosphate is the base but Im not sure.
September 5, 2012

Chemisty
How many moles of H2PO4 and HPO4 would be needed to prepare 1.0 L of a 0.01M phosphate buffer with a pH of 6.82?
September 5, 2012

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