Monday

December 5, 2016
Total # Posts: 1,559

**AP CHEM**

You need to use KH2PO4 and K2HPO4 to prepare a buffer with a pH of 7.45. Which of the following ratios of [base]/[acid] is required? For phosphoric acid, (H3PO4), Ka2 = 6.2 × 10–8. Do I use the Hasselbach equation?

*March 23, 2016*

**AP CHEM**

What is the pKa for the acid HA if a solution of 0.65 M HA and 0.85 M NaA has a pH of 4.75? ~~~I know you find the ph by doing -log of pka; how do you do the reverse when you have molarity? I am completely lost. :-(

*March 23, 2016*

**calc**

Gravel is being dumped from a conveyor belt at a rate of 15 ft^3/hr and its coarseness is such that is forms a pile in the shape of an inverted right cone whose height is three times its base radius. How fast is the height of the pile increasing when the pile has a height of ...

*March 19, 2016*

**College Physics**

what is the momentum of a 1500-kg car traveling with a speed of 20 m/s (45MPH)

*March 17, 2016*

**math**

what is the percentage of 5 1/10

*March 17, 2016*

**Maths**

a survey showed that 50 students were surveyed. 42 liked football, 15 liked tennis, 12 liked both football and tennis. How many students did not like either football or tennis?42 take away 12 = 30 15 take away 12 = 3 therefore 33 students like either one or both sports. ...

*March 14, 2016*

**Chemistry**

What is the mass of Na in 20g of Na2Co3

*March 7, 2016*

**Algebra**

Write an expression for this situation. A Resturant divided 20 gallons of lemonade among 4 tanks. How much lemonade does each tank contain?

*March 6, 2016*

**MATHS**

Alice sold 7 packs of pencils and 22 seperate pencils and Betty sold 5 packs and 2 separate pencils. Alice sold twice the amount betty sold, how much pencils are in a pack?

*February 23, 2016*

**Math**

a carpenter needs to buy either an 8 foot or a 10 foot piece of wood that will be cut into three pieces. these pieces will be 4 3/4 feet, 1 5/6, and 2 2/3 feet long. what length of wood should the carpenter buy?

*February 22, 2016*

**Language Arts**

Yup, A is correct.

*February 18, 2016*

**Math PLEASE!**

Would it be, "Diagonals bisect each other?".

*February 18, 2016*

**Math PLEASE!**

Hi there, I need help solving a proof. I put all my answers in for the blank spaces, but number 4 I can't get. If someone could help that would be great. Thank you! I've been trying to figure this out for the past two days and I'm honestly freaking out. My parents ...

*February 18, 2016*

**Math (check answers)**

Hi there, I need help solving a proof. I put all my answers in for the blank spaces, but number 4 I can't get. If someone could help that would be great. Thank you! Given: Triangle SVX is congruent to triangle UTX and Line SV is parallel to line TU. Prove: VUTS is a ...

*February 18, 2016*

**History Help Please!!**

Thanks Reed and Ms. Sue!!

*January 25, 2016*

**History Help Please!!**

Oh, sorry Ms. Sue! The Oklahoma Panhandle.

*January 25, 2016*

**History Help Please!!**

What is the most populated town in the Panhandle? How many people live there according to the 2010 census? I can not find this answer anywhere!!

*January 25, 2016*

**maths**

the area of triangle ABC is 38.8cm^2 Work out the length of AC Angle c =54 base=12 (scalene triangle)

*January 24, 2016*

**Math**

WHat is nine plus ten? Pleze help.

*January 12, 2016*

**Science**

Current can be passed through salt solution but can not pass through sugar solution. Why? Answer in detail....

*January 6, 2016*

**Pre-calculus: Logarithms**

ln56/ln7=ln8. Is this true or is this false? How can I find this out?

*December 16, 2015*

**Computer Science**

Need help, using loops, visual studio 2013. really need help, please write a program using loops that will calculate the following, how much would $24 deposited in a bank in 1626, have been worth at the end of this year if it had received an interest rate of 6% compounded ...

*December 1, 2015*

**Physics**

A length l, mass M of the rod can freely rotate about the fulcrum O in the vertical plane. A mass of m, velocity v of bullets at a distance within a fulcrum for the incident at the bar, when the maximum deflection angle of the rod 30 ¡ã,find the initial velocity ...

*November 17, 2015*

**Math**

if margaret ran 8 km/h uphill for 45 minutes on her way came down at 24 km/h what was her average speed?

*November 10, 2015*

**Spanish**

How can I form a sentence with these words? la / Juanita / las hijas / ser / de / mayor

*November 4, 2015*

**Spanish**

Hi there, I need to answer a few questions and I want to make sure I wrote them out correctly. Can you please check my answers? 1. if you were president, what would be your most important decision Si yo fuera presidente, me gustaría bajar los impuestos 2. Do you work ...

*October 31, 2015*

**geometry**

P P'(–4, –7) for the glide reflection where the translation is (x, y) (x,y-4) and the line of reflection is x= -1. Find the coordinates of P A.(-4,-11) B.(2,-7) C.(2,-3) D.(-4,-3)

*October 29, 2015*

**geometry**

A(-3,3) A is a glide reflection where the translation is (x,y) (x+5,y), and the line of reflection is y=1. What are the coordinates of A' A.(2,-3) B.(-3,5) C.(5,1) D.(2,5)

*October 29, 2015*

**geometry**

P P'(–4, –7) for the glide reflection where the translation is (x, y) (x,y-4) and the line of reflection is x= -1. Find the coordinates of P A.(-4,-11) B.(2,-7) C.(2,-3) D.(-4,-3)

*October 29, 2015*

**Math**

Donald bought a clock radio .The radio weighs 18 ounces. Donald paid $ 12 less than the normal sales price. If the normal price sales was $ 38, how much did Donald spend on the radio?

*October 29, 2015*

**geometry**

The vertices of a triangle are P(–4, 1), Q(–2, –8), and R(8, –1). Name the vertices of the image reflected across the y-axis. 1.P'(–4, –1), Q'(–2, 8), R' (8, 1) 2.P'(4, –1), Q'(2, 8), R'(–8, 1) 3.P'(4, 1...

*October 28, 2015*

**math**

Math Questions . Help please Which of the following is the number of milliliters in 2 gallons? (Note: 1 gallon = 4.4 liters; 1 liter= 1,000 milliliters) A. 440 B. 880 C. 4,400 D. 8,800 i think its D The hypotenuse (side C) of a triangle is 13 inches long. Which of the ...

*October 25, 2015*

**Spanish**

Thanks so much for your additional corrections. In the last paragraph, i'm speaking to "them" as the culture in a whole, so I left it the same - is this correct? Here is the revised draft: En este ensayo, voy a comparar el nivel de confort con la muerte entre la ...

*October 22, 2015*

**Spanish**

Thank you for your help. I tend to over-think the gender agreement, and end up changing things that I think need to be feminized, when they do not (clearly, from your corrections). Here is the revised version: En este ensayo, voy a comparar el nivel de confort con la muerte ...

*October 22, 2015*

**Spanish**

I'm working on an essay for Spanish. Below is what I have so far. Specifically, I am having trouble with ser / estar; subject - verb agreement, noun - adjective agreement. Can you help me proofread this? En este ensayo, voy a comparar el nivel de confort con la muerte ...

*October 22, 2015*

**chemistry**

Given 20g of benzoic acid contaminated with 0.4g of salicytic acid. 1)Determine the volume of hot water required to dissolve the mass of acid. 2)Calculate the mass of benzoic acid which participates when the solution is cooled to 20°C. Deduce. 3)Calculate the mass of ...

*October 21, 2015*

**Physics. Appreciate the help I can get.**

A 400.0 kg mass experiences a horizontal push force of +720 N and a friction force of 320 N. A) assuming the mass is initially moving at 5.0 m/s how far will it travel in 6.0s? B) how much work does the 720.0 Newton force do over the distance determined in part (a) C) ...

*October 20, 2015*

**Physics please help **

A) Use the principle of conservation of energy to calculate the maximum height reached by a projectile shot straight up from ground level with a speed of 120.0 m/s B) What real force (a manifestation of one of the fundamental four forces) would cause the actual maximum height ...

*October 20, 2015*

**Chemistry**

A 76.00-pound flask of mercury costs $150.00. The density of mercury is 13.534 g/cm3. a) Find the price of one cubic inch of mercury by calculating the following intermediate values. Following intermediate values include grams, cubic centimeters and cubic inch. I have no idea ...

*October 7, 2015*

**geometry**

2. the dashed triangle is a dilation image of the solid triangle. what is the scale factor (1 point)

*October 5, 2015*

**geometry**

the vertices of a triangle are p(-7 -4),q(-7,-8),and r(3,-3).Name the vertices of the image reflected across the line y=x. the choices are A. P'(4,7),Q'(8,7),R'(3,-3) B. P'(4,-7),Q'(8-7),R'(3,3) C. P'(4-7),Q'(-8,-7),R(-3,3) D. P'(-4,7),Q'...

*October 5, 2015*

**Precalculos**

Find quadratic function with points (0,5), (1,2) and (3,2). Graph the function

*September 27, 2015*

**Algebra 2**

Did I solve this problem correctly? (b-8)^2 (b)^2= b^2 (-8)^2= 64 b^2 + 64 If not how do I fix it?

*September 25, 2015*

**Precalculos**

Find the quadratic function which contains the points (0,5), (1,2) and (3,2). Graph the function

*September 21, 2015*

**chemistry**

What mass of protons would be required to just neutralize the charge of 1.1 g of electrons?

*September 14, 2015*

**Physics**

A 297-kg motorcycle is accelerating up along a ramp that is inclined 30.0º above the horizontal. The propulsion force pushing the motorcycle up the ramp is 3560 N, and air resistance produces a force of 270 N that opposes the motion. Find the magnitude of the motorcycle&#...

*September 4, 2015*

**french **

Après avoir fait le monologue de Cyrano de Bergerac (regardez toutes les vidéos!), parlez du PANACHE de Cyrano. Faites de la recherche sur Internet pour vous aider. Qu'est-ce que c'est que "Le Panache?" Comment est-ce que Cyrano le dé...

*July 21, 2015*

**Chemistry**

What would the partial pressure of hydrogen in the gas collection tube be if the water in the tube was 25.0 mm above the water level in the beaker, the room pressure was 655 mm Hg, and the temperature of the room was 22 degrees C?

*July 6, 2015*

**english synthesis**

Betty is a pretty girl. Fatimah is a pretty girl. Both_______________________________________________.

*June 22, 2015*

**math**

use branching method or model. I think the answer is $90. 1u is 15. I am not so sure.

*June 22, 2015*

**Chemistry**

I figured it out, deltaH is in kJ/grams which is 68. So 20.0gx(1168kJ/68g)=342.9 kJ.

*June 8, 2015*

**Chemistry**

How much heat is absorbed/released when 20.00 g of NH2 reacts in the presence of excess O2 to produce NO and H2O according to the following chemical equation: 4NH3 + 5O2 --> 4NO + 6H2O, deltaH= +1168 kJ. The answer is 342.9 kJ of heat absorbed. I want to know how to ...

*June 8, 2015*

**Physics**

In deep space, a small rock orbits an asteroid. The circular, orbit radius is 1037m and the velocity of the rock is 8.02m/s. Find the mass of the asteroid.

*May 26, 2015*

**Statistics**

The TreeDropped Fruit Company wants to sell its apples in pink and yellow gift boxes. To design the boxes, the company needs to estimate the average diameter of their apples. A random sample of 50 apples has a mean of 4.1 inches. Using previous research you assume a population...

*April 23, 2015*

**Math (ASAP)**

Yes I did.

*April 1, 2015*

**Math (ASAP)**

Find the variable for the following 3x3 matrix. |x 3 -1 2 1 -2 4 1 x|

*April 1, 2015*

**Math**

Yes.

*April 1, 2015*

**Math**

I need help with this ASAP. Thanks so much!

*April 1, 2015*

**Math**

Find the variable for the following 3x3 matrix. |x 3 -1 2 1 -2 4 1 x| Note: This entire matrix =10

*April 1, 2015*

**Chemistry**

Suppose that a mixture of ice and water is placed in a refrigerator that is held at the freezing point of water, exactly 0.0C. Calculate deltaS for the ice-water mixture, deltaS for the refrigerator, and deltaStotal when 5.00g of ice forms. Is this process spontaneous? Is the ...

*March 20, 2015*

**Math**

A bag contains 22 1\2 cups of flour. A recipe for pancakes uses 1 1/4 cups of flour. How many batches of pancakes can be made with one bag of flour?

*March 17, 2015*

**Algebra**

Please help! I don't understand the question!

*March 11, 2015*

**Algebra **

If a=4.9 and b=1 5/9, the determine the value of the reciprocal of b/a. Express your answer as a common fraction.

*March 11, 2015*

**science **

is it possible for an object's weight to change while it's mass remains constant?

*February 2, 2015*

**Chemistry Rate Reaction**

What is the rate of the reaction: H2SeO3 + 6I- + 4H+ Se + 2I3- + 3H2O given that the rate law for the reaction at 0°C is rate = (5.0 × 10^5 L5mol-5s-1)[H2SeO3][I-]^3[H+]^2 The reactant concentrations are [H2SeO3] = 1.5 × 10^-2 M, [I-] = 2.4 × 10^-3 M, [H...

*February 1, 2015*

**Statiatics**

A student ran out of time on a multiple choice exam and randomly guessed the answers for two problems. Each problem had 5 answer choices a, b, c, d, e and only one correct answer. What is the probability that she answered neither of the problems correctly? Do not round your ...

*January 31, 2015*

**Math**

Thank you! (:

*January 26, 2015*

**Math**

Can you check my work and tell me if I did anything wrong? 1. With the functions: f(x) = x^2 + 3x and g(x) = -3 + x what is f(x) + g(x)? Answer: x^2 + 4x - 3 2. With the functions: f(x) = x + 4 and g(x) = x -3 what is (f*g)(x)? Answer: x^2 + x - 12 3. With the functions: f(x...

*January 26, 2015*

**math**

Uncle Toby is making a scale model of the battlefield at Fredericksburg. The area he wants to model measures about 11 mi by 7.5 mi. He plans to put the model on a 3.25 ft by 3.25 square table. On each side of the model he wants to leave at least 3 inches between the model and ...

*January 20, 2015*

**algebra**

Hi I need help with this question please. The base salary for a job is $3,000 per month. For each full year a person holds the job the salary increases by $300 per month. A) Write as a function where x is years worked and y is the total monthly salary. B)Solve the function if ...

*January 16, 2015*

**History**

Which of the following groups benefitted the least from the prosperity of the second industrial revolution? A. Farmers B. Railroad workers C. Factory workers D. Textile workers

*January 15, 2015*

**Help with math**

You can do 7/20 and multiply 7x5 and 20x5 to get 35/100.

*January 15, 2015*

**MATH HELP**

ohh ok now i understand thanks ms. sue

*January 13, 2015*

**MATH HELP**

six neighbors share 4 pies equally. how much of a pie does each get? three brothers share 2 sandwiches equally. how much of a sandwich does each brother get?

*January 13, 2015*

**Science**

Explain the motion of a baseball and the forces acting upon it as it leaves the pitcher’s hand and travels toward the batter at home plate. Identify the term applied to this type of motion.

*January 12, 2015*

**Statistics **

Did you ever buy an incandescent light bulb that failed (either burned out or did not work) the first time you turned the switch on? When you put a new light bulb into a light fixture, you expect it to light and most of the time it does. Consider 8-packs of 60-watt bulbs and ...

*January 12, 2015*

**Statistics **

The image of the public library is constantly changing, and their online services continue to grow. Usage of the library's home page grew by 17% during the past 12 months. It has been estimated that the current average length of a visit to the library's home pages is ...

*January 12, 2015*

**Statistics **

A company that produces rivets used by commercial aircraft manufactures knows that the shearing strength (force required to breaking) of its rivets is a major concern. The company believes the shearing strength of its rivets is normally distributed with a mean of 925 lbs and a...

*January 12, 2015*

**Math **

What is the smallest integer that can possibly be the sum of an infinite geometric series whose first term is 9? Please explain in steps.

*January 9, 2015*

**Math **

What is the smallest integer that can possibly be the sum of an infinite geometric series whose first term is 9? Please explain in steps.

*January 8, 2015*

**Math **

What is the smallest integer that can possibly be the sum of an infinite geometric series whose first term is 9? Please explain in steps.

*January 8, 2015*

**science**

How much heat in kcal must be added to 0.77 kg of water at room temperature (20°C) to raise its temperature to 50°C?

*December 26, 2014*

**statistics HELP!**

A data set includes body temperatures of healthy adult humans for which 98.1F and s= 0.56F. What is the best point estimate of the mean body temperature of all healthy humans? Using the sample statistics, construct a confidence interval estimate of the mean body temperature of...

*December 16, 2014*

**Algebra**

To solve 9x^2-12x+4=49 by using the Square Root Property, you would first rewrite the equation was as A. 9x^2-12x-45=0 B.(3x-2)^2=+/-49 C.(3x-2)^2=7 D.(3x^2)^2=49

*December 13, 2014*

**statistics**

In a test of the effectiveness of garlic for lowering cholesterol, 47 subjects were treated with garlic in a processed tablet form. Cholesterol levels were measured before and after the treatment. The changes in their levels of LDL cholesterol (in mg/dL) have a mean of 3.8 and...

*December 13, 2014*

**Find the probabilty**

Find the probability of S^2 3.3 1 6.3 49

*December 13, 2014*

**Calculus**

Okay, thanks

*December 11, 2014*

**Calculus **

My question: An equation of the line tangent to the graph of f(x) = x(1 - 2x)3 at the point (1, –1) is?? My answer: y = –2x + 1

*December 11, 2014*

**Subtraction equation**

Please help The original acreage was 125,000, recentlly they expanded their boundaies by 93,533 areas, how do I write subtraction equation to find new acreage

*December 4, 2014*

**Math **

Given that x<5, rewrite 5x- (x-5) without using the absolute value signs. The () are absolute value signs.

*December 4, 2014*

**Language**

Is being delusional a characteristic trait

*December 3, 2014*

**Math: Reiny **

I already posted this question, and Reiny had a question about the question. How many square units are in the region satisfying the inequalities y>=(x) and y<=-(x)+3? Express your answer as a decimal. * the () are absolute value signs. •Math - Reiny, Wednesday, ...

*December 3, 2014*

**Math **

How many square units are in the region satisfying the inequalities y>=(x) and y<=-(x)+3? Express your answer as a decimal. * the () are absolute value signs.

*December 3, 2014*

**English**

Would you consider delusional a personality trait if not what other word that is a trait and is similar to delusional

*December 3, 2014*

**math**

Oh God! I made a big mistake at this part 33 - 2y = -1 -2y = 32 I should improve

*November 27, 2014*

**math**

If both numerator and denominator of a fraction are increased by one, the fraction formed is 2/3. if both numerator and denominator are decreased by two, the fraction formed is 3/5. what is the fraction formed, if both numerator and denominator are increased by four? Please ...

*November 27, 2014*

**finance**

The countries of Stabilato and Variato have the following average returns and standard deviations for their stocks, bond, and short-term government securities. What range of returns should you expect to earn 95 percent of the time for each asset class if you invested in ...

*November 25, 2014*

**finnce100**

In late 2010, you purchased the common stock of a company that has reported significant earnings increases in nearly every quarter since your purchase. The price of the stock increased from $ 12 a share at the time of the purchase to a current level of $ 45. Notwith-standing ...

*November 25, 2014*

**math**

John bought a total of 30 white and brown pens for a total of $32. The cost of each white pen is 70 cents more than the cost of each Brown pen. Which would be the possible value of the cost of each Brown pen( in cents)? Please help me in forming a equation.

*November 25, 2014*

**math**

Y = 0.93

*November 25, 2014*