# Posts by jenny

Total # Posts: 1,591

**Chemistry**

Rearrange the titration calculation to find Mb in a solution. If I put 13.2 mL of NaOH and 0.3 mL of phenolphthalein in 25 mL of KHP, what is the Mb of the solution? The original solution of NaOh is 100 mL and is composed of 1.069e-15 moles of H+, 9.445e-2 moles of OH-, and 9....

*August 2, 2016*

**basic college mathematics**

A basketball player made 11 free throws out of 12 during a game.what fraction of free throws did the player make?

*July 31, 2016*

**chemisty**

How many mL of .200 M NaOH are required to completely neutralize 5.00 mL of 0.100 M H2PO4?

*July 28, 2016*

**chemisty**

If 26.5 mL of 0.222 M HCl reacts with excess Mg, how many mL of hydrogen gas are produced at STP?

*July 28, 2016*

**Math(Please Help Assignment Due)**

The following is taken from a State of the Park Report for Banff National Park. Visitors Numbers Total Visitors: 2004= 3,135,727. 2005=3,164,906. 2006=3,281,435 Total visitor days: 2004= 7,453,465. 2005= 7,518,997. 2006= 7,784,044 Total visitors have increased by 4.6% and ...

*June 29, 2016*

**Math3( Please Help Assignment Due)**

80 U2 songs (in seconds) were selected at random. Assume that the data is normally distributed and that the bands entire collection of songs has a mean and standard deviation equal to those calculated(mean=289.7 or 290, standard deviation= 76.8 or 77). What percentage of U2 ...

*June 27, 2016*

**Math2(Please Help Assignment Due)**

An isosceles triangle has two parallel sides and one non parallel side, the base. The angles are labelled q and r at the base and p at the point of the triangle. One parallel side is 44m in length, while the angle directly opposite from this side(angle q) is 86 degrees. ...

*June 27, 2016*

**Math( Please Help, Assignment Due)**

Isaac stands on the shoreline of a lake and looks to a campground across the lake. He uses a compass to determine that the campground is 60 degrees west of north. He then paddles his canoe north for a distance of 550m. He stops and determines that the campground is now 40 ...

*June 27, 2016*

**Math(Please Help Assignment Due Tomorrow)**

From the length(in seconds) of 80 randomly chosen U2 songs, the mean determined was 289.6986295 and standard deviation was 76.82292002. Assume that the data is normally distributed and that the bands entire collection of songs has a mean and standard deviation equal to those ...

*June 23, 2016*

**Math**

Describe a scenario where you expect a set of data to have A.) a large standard deviation B.) a small standard deviation The prize for winning a contest can be chosen from category a or category b. Prizes from category a have a mean of $1000 and a standard deviation of $50. ...

*June 19, 2016*

**Math, Please Help**

Describe a scenario where you expect a set of data to have A.) a large standard deviation B.) a small standard deviation

*June 19, 2016*

**Please Help, I Don't Know How To Do This**

Chef Potato's body has a cylinder in the middle and two half spheres that make up his bottom and head. He has the two dimensional shape measurements as follows: 20 cm in total length, 5 cm between the end of the cylinder and the top of the top sphere. Reduce Chef 1.) ...

*June 17, 2016*

**Proportional Reasoning( Please Help Assignment Due**

Chef Potato's body has a cylinder in the middle and two half spheres that make up his bottom and head. He has the two dimensional shape measurements as follows: 20 cm in total length, 5 cm between the end of the cylinder and the top of the top sphere. Reduce Chef 1.) ...

*June 17, 2016*

**Math(Scale Factors and Scale Diagrams)**

Sarah's dad found a table hockey game with dimensions 9 1/4 inches by 4 15/16 inches. Unfortunately, this game was only 1/4 the size of the table top hockey game he wanted. Determine the dimensions of the table Sarah's dad wanted. Please help me with this, the ...

*June 16, 2016*

**Please Help**

What is the range of 4(X-5)^2 + 7

*June 15, 2016*

**Math Please Help Assignment Due**

The graph of the function f(X)= 4x^2 -17x-9 has two X intercepts. What is the value of the larger X intercept to one decimal place?

*June 15, 2016*

**Math Please Help Assignment Due Today**

Ella wants to build a rectangular pen for her dogs with two distinct sections. The area of the enclosure can be represented by A= Xy and the total length of fencing can be represented by 3x + 2y = 60. If she had 60 ft of fencing to work with, determine the maximum area she can...

*June 15, 2016*

**Psychology**

Which research method is BEST at explaining behavior (as opposed to simply describing it)?

*June 11, 2016*

**Math(Please Help Assignment Due)**

Consider the following pattern involving fractions: 15/20=3/4, 15-3/20-4=12/16=3/4 18/15=6/5, 18-6/15-5=12/10=6/5 1.) Make a conjecture about the pattern. Show that the conjecture is true for another example. 2.) Explain how inductive reasoning can be used to support the ...

*June 9, 2016*

**Math2**

Paula has a mathematical magic trick. She gives the following instructions to her friend Jessica: -think of a number - triple it - add 6 - divide by 3 - add 5 - subtract your original number Paula now knows the number Jessica ended up with. 1.) what number will the sequence of...

*June 9, 2016*

**Math**

Elizabeth claims that she has proven that 7=5with the following: 7(a+b)-5(a+b)=7c-5c 7a+7b-5a-5b=7c-5c 7a+7b-7c=5a+5b-5c 7(a+b-c)/(a+b-c) = 5(a+b-c)/(a+b-c) 7=5 1.) Explain why this is an invalid proof.

*June 9, 2016*

**ecomomics**

Why do you thinks the country has been in a recession for this long when we have many Economists? Why did they not prevent the recession in the first place? Make sure to include some references in your answers.

*June 8, 2016*

**mathematics**

Cand D are two observation posts on the same horizontal ground at the foot A of a vertical tower AB.the tower is 18m due north of D and 24m east of C.the angle of elevation of B from D is 35¡ã.calculate to three s.f the height AB,distance CD,angle of elevation ...

*June 4, 2016*

**math**

A designer enlarged both the length and the width of a rectangular carpet by 60 percent. The new carpet was too large so the designer was asked to reduce its length and width by 25 percent. By what percent was the area of the final design greater than the area of the original ...

*June 3, 2016*

**Calc-Math**

The graphs of the function f (given in blue) and g (given in red) are plotted above. Suppose that u(x)=f(x)g(x) and v(x)=f(x)/g(x) Find each of the following:u(x) and v(x)..

*May 26, 2016*

**banglur**

calculate the molality of sulfuric acid in which the mole fraction of water is .85

*May 25, 2016*

**Maths Ms sue**

Select the TWO options that are TRUE statements about survey sampling. Select one or more: (1)Cluster sampling usually increases the sampling error compared to a simple random sample of the same size. (2)In stratified sampling, each member of the population must be in exactly ...

*May 10, 2016*

**Math**

Ryan has 3/4 cup of pudding. How many 1/6 cup servings of pudding can ryan make

*May 10, 2016*

**Chemistry**

Iron and oxygen gas can react to form the magnetic oxide of iron Fe3O4. How many grams of Fe3O4 can be made from 42.3 g of Fe?

*May 3, 2016*

**Math**

Maury plans to cover his floor with 1 square foot tiles. The dimensions are 8ft by 9 ft. How many times will Maury need?

*May 2, 2016*

**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 separate 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*