Thursday

July 30, 2015

July 30, 2015

Total # Posts: 906

**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*

**calculus**

I'm confused as to how you got d =2 and x=sqrt(3)
*March 4, 2012*

**calculus**

A plane flying horizontally at an altitude of 1 mi and a speed of 500 mi/h passes directly over a radar station. Find the rate at which the distance from the plane to the station is increasing when it is 2 mi away from the station. I drew a diagram and figured out I need to ...
*March 4, 2012*

**chemistry**

A buffer is prepared by adding 300.0 mL of M NaOH to 400.0 ML of 2.0 M CH3COOH. What is the pH of this buffer? ks=1.8X10^-5
*March 4, 2012*

**calculus**

Alright thanks
*March 3, 2012*

**calculus**

Implicit Differentiation question x^y = y^x I was wondering if I was right in the steps I was taking first was to take the Ln or both sides making it y Ln(x) = x Ln(y) then just taking the derivatives of both sides using product rule twice y/x + y'Ln(x) = xy'/y + ln(y...
*March 3, 2012*

**physics**

What is the kinectic energy of a body of mass 2000kg moving with a velocity of 10m/s
*February 29, 2012*

**physics**

A rectangle has a length of 2d and a height of d. Each of the following three charges is located at a corner of the rectangle: +q1 (upper left corner), +q2 (lower right corner), and -q (lower left corner). The net electric field at the (empty) upper right corner is zero. Find ...
*February 22, 2012*

**physics**

remove the brackets to see the diagram sorry
*February 19, 2012*

**physics**

Five styrofoam balls are suspended from insulating threads.Several experiments are performed on the balls and the followingobservations are made: I. Ball A attracts B and repels C II. Ball D attracts B and has no effect on E III. A negatively charged rod attracts both A and E ...
*February 19, 2012*

**physics (Right Hand Rule Question)**

A proton traveling due east in a region that contains only a magnetic field experiences a vertically upward force away from the surface of the earth. What is the direction of the magnetic field? a)North b)East c)South d)West e)Down I know I need to use the right hand rule to ...
*February 17, 2012*

**physics**

Thanks for the help, but I don't quite understand why you chose to multiply everything together.
*February 16, 2012*

**physics**

A proton moves in a constant electric field from point A to point B. The magnitude of the electric field is 6.4 × 10^4 N/C; and it is directed as shown in the drawing, the direction opposite to the motion of the proton. If the distance from point A to point B is 0.50 m, ...
*February 16, 2012*

**Finance**

What is the economic value today of each of the following payment streams if money can earn 7.5%?(Note that the two streams have the same total nominal value.) a. $1000, $3000, and $2000 due in one, three, and five months, respectively. b. Two $3000 payments due two and four ...
*February 14, 2012*

**literature**

Dez sweaty Testicles
*February 14, 2012*

**College Algebra**

Find the value of the missing variable P=4s ; s=32
*February 9, 2012*

**Chemistry**

When 0.100 mol of CaCO3 (s) and 0.100 mol of CaO (s) are placed in an evacuated container with a volume of 10.0-L and heated to 385 K, PCO2 = 0.220 atm after equilibrium is established: CaCO3(s) ⇌ CaO (s) + CO 2 (g) An additional 0.300 atm of CO2 (g) is pumped in. What ...
*February 9, 2012*

**Chemistry**

As an environmental chemist, you want to find the Kc for the following reaction: 2 NO2 (g) ⇌ N2 (g) + O2 (g) Kc = ? Use the following data to find the unknown Kc : ½ N2(g) + ½ O2(g) ⇌ NO (g) Kc = 4.8 x 10-10 2 NO2(g) ⇌ 2 NO (g) + O2 (g) Kc = 1.1...
*February 9, 2012*

**arithmetic**

The sum of the first 10th term of an a.p is 255,the sum of the first 20 term is 1010.find the next 2020 term of the progression
*January 31, 2012*

**Physics**

A cheetah running at 30 m/s is pursuing a zebra going in a straight line at 14 m/s. If the zebra has a 35 m head start, how much time does it take for the zebra to catch up? (Please show all work. I know the answer, but I need the step by step instruction to understand.)
*January 30, 2012*

**calculus**

Consider the function f(x) = piecewise [(x^3)(cos(1/x)) , x=/=0], [0, x=0]. Use the definition of the derivative at a point to determine if f is differentiable at x=0 I am not sure how to start this question. Am I supposed to plug in x = 0?
*January 29, 2012*

**physics **

A student tries to produce notes of higher frequency by blowing a trumpet harder Discuss whether he will succeed?
*January 29, 2012*

**math**

700.00
*January 25, 2012*

**math**

explain the difference between the expressions x-3 and 3-x
*January 20, 2012*

**Help!!!**

the angle of elevation from the top of an office building in makati to the sm appliance center is 68 degree , while the angle of depression from the top of the office building to the bottom is 63 degree the office building is 290 feet from the sm appliance center. find the ...
*January 19, 2012*

**geometry**

given: 12x over 8+17=117 prove: x=150
*January 18, 2012*

**geometry**

given: 4x+8 over 2 equals 9 prove: x= 5 over 2
*January 18, 2012*

**Math**

What is the constant of variation? An x-y table shows the following coordinate pairs: four comma fifteen, five comma twelve, and six comma ten. Answer 1 3 thirty sixty I have been stuck on it all day. I am in urgent need of help
*January 11, 2012*

**Math**

every time Mr Frank buys 4 pots of flowers for the float, the flower shop will give him 1 pot free.After 4 weeks, he had 50 pots of flowers.How many pots did he get free?
*January 11, 2012*

**MIPS Assembly programming**

Hi there, I need to implement in assembly mips an iterative binary search method. Here's my code: # this program implements binary search # the equivalent pseudo code is the following: # first = 0 # last = size -1 # while (last - first > 1) { # mid = (last-first)/2 + ...
*January 7, 2012*

**Physics**

Realizing that she often doesn't have her students' full attention during class, a professor devises an elaborate device on which to stand while she lectures. The pulley is placed so that the string makes a 45.0-degree angle with the beam. The beam is uniform, 5.00 ...
*January 5, 2012*

**Pysics**

Realizing that she often doesn't have her students' full attention during class, a professor devises an elaborate device on which to stand while she lectures. The pulley is placed so that the string makes a 45.0-degree angle with the beam. The beam is uniform, 5.00 ...
*January 5, 2012*

**algebra 2**

x intercepts of f(x)15x^2-12x-48
*January 4, 2012*

**world geography **

Two U.S. West Coast ports are world ports that connect the United States and Asian markets. They're Los Angeles/Long Beach and
*December 26, 2011*

**world geography **

i need the answers to Geography Essentials, Europe, And Russia And Its Neighbors and East Asia And Southeast Asia and South Asia, Northern Africa, And Southwestern Asia Sub-saharan Africa, Australia,oceania, And Antartica Latin America And North America i studied and i didnt ...
*December 26, 2011*

**ALGEBRA**

Find three ordered pairs that satisfy the equation. y=5x+8
*December 18, 2011*

**ALGEBRA**

Suppose the modified quota is 5.47. Fill in the blanks, and round your answers to two decimal places. (a) Find the lower quota. (b) Find the upper quota. (c) Find the arithmetic mean of the lower and upper quotas. (d) Find the geometric mean of the lower and upper quotas. (e...
*December 18, 2011*

**calculus**

Oh also if you can, how do you find d2y/d2x for parametrics?
*December 16, 2011*

**calculus**

Find an equation of the tangent(s) to the curve at a given point. Then graph the curve and the tangent(s). x = 6sin(t), y = t^2 + t; (0,0) How do I do this without the value of t? I don't see a way to eliminate the parameter.
*December 16, 2011*

**calculus**

Thank you!
*December 15, 2011*

**calculus**

I don't quite understand Cartesian equations. I am told to Eliminate the parameter to find a cartesian equation of the curve. X= 3 - 4t, y= 2 - 3t there is no inequality I don't understand what I am trying to find.
*December 15, 2011*

**math**

a boy spends 16.5 hrs studying. he spends 0.6 hrs studying English. what percent of his time is spent on English
*December 11, 2011*

**ALGEBRA**

You are playing Texas Hold’em against one other opponent. Your two down cards are 6 of (diamonds) & 7 of (diamonds). The first three cards to come up are 3 of (diamonds), 4♣ 9♠. The next card to come up is 10 of (diamonds). You and your opponent have both ...
*December 6, 2011*

**Biology**

4)You count your cells and have 8x10ᶺ5 viable cells/ml you want to see (dilute the cells) to end up with 2x10ᶺ5 viable cells/ml. What volume of cells will you put into 20 ml?
*December 6, 2011*

**chemistry**

4)You count your cells and have 8x10ᶺ5 viable cells/ml you want to see (dilute the cells) to end up with 2x10ᶺ5 viable cells/ml. What volume of cells will you put into 20 ml?
*December 6, 2011*

**Chemistry**

3)How many grams of sodium chloride do you need to weigh out to prepare 1.4L of 0.9% NaCL solution?
*December 6, 2011*

**Chemistry**

2)How to prepare 5.6 liter of 50 mM NaCL solution (mol wt 58.44) using 10% NaCL stock solution?
*December 6, 2011*

**Chemistry**

1) Calculate the amount of sodium chloride, NaCL (mol wt 58.44) and potassium chloride; KCL (Mol wt 74.56) needed to prepare 500 ml of 1.25 NaCL/10 mM kcl solution dilutions in water.
*December 6, 2011*

**calculus**

Anti Derivative of F''(x) = 4 + 6x + 24x^2, f(0) = 3, f(1)=10 Not sure how to find the value of the constant for F'(x).
*December 6, 2011*

**ALGEBRA**

Andy draws the question card, “How many 7s do you see?” He answers, “one,” because he cannot see the 7 on his own head; he sees only the 7 on Belle's head. Next Belle draws the question card, “ Of the four even numbers, how many different even ...
*November 30, 2011*

**ALGEBRA**

Andy draws the question card, “How many 7s do you see?” He answers, “one,” because he cannot see the 7 on his own head; he sees only the 7 on Belle's head. Next Belle draws the question card, “ Of the four even numbers, how many different even ...
*November 30, 2011*

**ALGEBRA**

A newspaper article discussing whether Social Security could be cut offered the information shown in the figure. Use the information in these graphs to answer the question. How many workers pay into Social Security for each person getting benefits in 2000? persons
*November 28, 2011*

**ALGEBRA**

A newspaper article discussing whether Social Security could be cut offered the information shown in the figure. Use the information in these graphs to answer the question. What is the difference between the amount of money collected from Social Security taxes and the amount ...
*November 28, 2011*

**E-COMMERCE**

Please give me a hint on how to solve the scenario
*November 28, 2011*

**E-COMMERCE**

Imagine that you own a small, local clothing store along the Jersey Shore boardwalk and decide that you want to engage in e-Commerce. Write a 4-5 page paper on the following: 1. Imagine that someone has offered you $1,000 to buy your domain name shortly after your started your...
*November 28, 2011*

**ALGEBRA**

A single card is drawn from a standard deck of cards. Find the following probabilities. A face card is a jack, queen, or king.
*November 27, 2011*

**ALGEBRA**

What are the odds in favor of drawing a card lower than a 5 from an ordinary deck of cards?
*November 27, 2011*