Friday
December 19, 2014

Posts by Daniel


Total # Posts: 860

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
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

Calculus
explain why f(x)=(1)/(x^2-9) is discontinoues at x=-3
September 4, 2012

Managerial Accounting
Sandusky Inc. has the following costs when producing 100,000 units: Variable Costs $400,000 Fixed Costs 600,000 An outside supplier is interested in producing the item for Sandusky. If the item is producing outside, Sandusky could use the released production facilities to make...
September 4, 2012

math
mathematically Evaluate without using tables 2 log base 10 raised 2 power 5 + log base 10 36 - log base10 9 that is, 2log10 5 +log 10 36 - log 10 9
August 15, 2012

Math
Function Table X. Y 0.5. 2 1. 1 2. 0.5 4. 0.25 5 10 What is the function rule that represents the relationship between x and y.
August 14, 2012

math
assume that a sample is used to estimate a population proportion p. find the margin of error E that corresponds to the given statistics and confidence level. 98% confidence, the sample size is 780, of which 40% are successes what does that mean in English?
July 22, 2012

Algebra 1
On 2 investments totaling 15,00, peter lost 2% on one and earned 8% on the other. If his annual receipts were $204, how much was each investment?
July 9, 2012

Algebra 1
On 2 investments totaling 15,00, peter lost 2% on one and earned 8% on the other. If his annual receipts were $204, how much was each investment?
July 9, 2012

physics
Two identical cannons fire cannonballs horizontally with the same initial velocity. One cannon is located on a platform partway up a tower, and the other is on top, four times higher than the first cannon. How much farther from the tower does the cannonball from the higher ...
June 15, 2012

physics
4m/s
June 13, 2012

algebra
all two-digit numbers whose units digits is half the tens digit?
June 5, 2012

algebra
all two-digit numbers whose units digits is half the tens digit?
June 5, 2012

Science
A boy lift a box that weighed 40 newtons if the boy was 1.5 meter tall how much work did he do as he lift the box?
June 1, 2012

chemistry
briefly explain how to demostrate that all the reactants in a neutralization reaction has been used up
May 30, 2012

Algebra
A pizza place sells five topping pizzas with the following options. Crust: Classic, Crispy Toppings: Extra cheese, pepperoni, sausage, onions, banana peppers, jalapenos, tomatoes, fresh herbs, mushrooms, black olives. What is the probability that a customer will order a five ...
May 24, 2012

ALGEBRA
A car dealer will sell you a used car for $7,542 with $542 down and payments of $213.27 per month for 36 months. What is the APR? (Use the formula on page 156. Round each answer to the nearest tenth.)
May 20, 2012

ALGEBRA
If a business borrows $18,000 and repays $24,300 in 4 years, what is the simple interest rate?
May 20, 2012

miss sue
does this include the vowels
May 19, 2012

hebrew basic
we need to write on the computer the translation for careful speech we do not know how to use the keys to make the symbols help please
May 19, 2012

ellipses
8x^2+y^2+80x-6y+193=0 Find the center (which i think is (-5,3) Find the major axis Find the minor axis && find the distance from C to foci
May 11, 2012

ellipses
If the major axis is vertical and has a length of 10 units,the minor axis has a length of 8 units,and the center C=(4,-2).Fill in the missing denominators for the equation and determine the distance from C to the foci (c).
May 11, 2012

geometry
Between the points (8,-6) and (-8, 6) find A.) The distance (simplified radical form use sqrt(n). B.) The midpoint ( use ( , ) and .5 for 1/2. Separate answer with commas. Distance, midpoint
May 8, 2012

ALGEBRA 2
rewrite the quadratic equation y=-3x^2+3x+2 into standard form to determine the vertex --------, ---------, --------
May 7, 2012

Algebra II
A line of chorus girls, even though it doesn't make sense -.-
May 5, 2012

MATH
CAN 1/2 EVER BE GREATER THAN 1/4. IF NOT THEN WHY?
May 3, 2012

Math
Can 1/2 ever be greater than 1/4. Why.
May 2, 2012

Algebra 2
What is the equation of a parabola whose vertex is (5, -2) and whose graph is 6 times taller than y=x^2? Include y= as part of your answer
May 2, 2012

Physics
A small 0.499 kg object moves on a frictionless horizontal table in a circular path of radius 0.96 m. The angular speed is 6.37 rad/s. The object is attached to a string of negligible mass that passes through a small hole in the table at the center of the circle. Someone under...
April 23, 2012

Physics
A small 0.499 kg object moves on a frictionless horizontal table in a circular path of radius 0.96 m. The angular speed is 6.37 rad/s. The object is attached to a string of negligible mass that passes through a small hole in the table at the center of the circle. Someone under...
April 23, 2012

GRAMMAR
WHAT IS THE ADJECTIVE AND NOUN IN THE SENTENCE: THREE GUESTS BRING GUITARS. Thank you Daniel
April 19, 2012

Pre-Calc Help
Evaluate the expression under the given conditions. (show work please) sin(A-B); tan A=12/5, A in quadrant 3, sinB=-3sqrt(10)/10, B in quadrant 4.
April 19, 2012

Math
A ladder is placed 6 ft aainsgt a 25 ft building. How high above the ground does the ladder touch the wall?
April 16, 2012

life orientation
in 10-15 lines critically discuss 5 ways in which the human or environmental problem impacts on the community.provide relevant sources to support your claims?
April 16, 2012

physics
If a lead bullet goes fast enough, it can melt completely when it comes to a halt suddenly, and all it's kinetic energy is converted into heat via friction. Find the minimum speed of a lead bullet (initial temp. = 30.0 C) needed for this to happen. So I related that Q = KE...
April 15, 2012

Social Studies
south
April 12, 2012

english
I dont know how to start it and i basically dont know how to do it.. or even what to put..
April 10, 2012

ALGEBRA
(a) Simplify the expression. 3(x - 2) - 9(x**2 + 7 x + 4) - 5(x + 8) (a) Simplify the expression.
April 9, 2012

ALGEBRA
Solve the system. $ \left\{ \begin{tabular}{l} $ y = x + {\color{red}-2} $ \\ $ y = -{\color{red}3} x + {\color{red}10} $ \end{tabular} \right. $
April 8, 2012

ALGEBRA
Find three ordered pairs that satisfy the equation. y = 5 x - 4
April 8, 2012

ALGEBRA
Find the functional values requested in the problem. h(x)=5 x-1
April 8, 2012

physics
An object is located 30 cm to the left of a converging lens whose focal length is 50 cm. (a) Draw a ray diagram to scale and from it determine the image distance and the magnification. (b) Use the thin lens and magnification equations to verify your answer to part (a). I am ...
March 20, 2012

math
Ross ran a mile in 6.28 minutes to win a race.Don finished second with a time of 6.55 minutes.How much faster was Ross than Don?
March 19, 2012

physics
A convex mirror in an amusement park has a radius of curvature of 3.00m. A man stands in front of the mirror so that his image is half as tall as his actual height. At what distance must the man focus his eyes in order to see his image? I calculated the focal length using f...
March 17, 2012

physics
The drawing shows a copper wire (negligible resistance) bentinto a circular shape with a radius of 0.48 m. The radial sectionBC is fixed in place, while the copper bar ACsweeps around at an angular speed of 16 rad/s. The bar makeselectrical contact with the wire at all times. ...
March 12, 2012

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