Saturday

November 28, 2015
Total # Posts: 469

**Chemistry**

The equilibrium constant for Br2 + Br <-> Br3 at 25 degrees is 18. Calculate the equilibrium constant Br3 <-> Br2 + Br
*November 26, 2015*

**biology**

Describe in a short answer the history of the discovery of DNA
*November 16, 2015*

**Finance/math**

Reimbursement per screen 66.05 Equip cost/mo 1450.00 technologist cost per Mammography $15.60 tech aid/per $3.10 Variable cost per mamo $15.00 Equip. maintanance/mo. per machine $916.66 1) what is the monthly patient volume needed per month to cover fixed and variable costs? 2...
*November 3, 2015*

**financial management**

Ashley, If you look at the bottom of your page under "Related Questions", this same question has been answered 4 different times.
*August 19, 2015*

**G ss jikowyi subject physics**

Mercy, if you look at the bottom of this page, where it says "Related Questions", this question has been answered about 3 different times.
*August 19, 2015*

**social studies**

Nina, it could be all of the answers. However, I would say D is probably the best choice.
*August 19, 2015*

**Life Orientation**

The biggest service delivery protest in most communities is over the company Uber. The taxi drivers do not like Uber because it is taking away business from the taxi drivers. If a person needs a ride somewhere, they no longer have to call a taxi company. Instead, they can get ...
*August 19, 2015*

**Algebra**

I need help with the following question: (2 + p)(r+ 9) = (r + 9)(2 + p) Is this communtative property? Thank you very much for all your help.
*August 19, 2015*

**Algebra II**

Thank you STEVE
*August 19, 2015*

**Math**

Yes, the answer is 25. You multiply and add everything in the ( ) first which gives you 2 + 23 = 25
*August 19, 2015*

**algebra**

thank you
*May 25, 2015*

**algebra**

6 slices of pizza and 4 drinks cost $12.60 while 3 slices of pizza and 4 drinks cost $8.10. What is the cost of each?
*May 25, 2015*

**algebra**

3 shirts and 2 hats cost $52. 2 shirts and 1 hat cost $32. Find the cost of each.
*May 25, 2015*

**written communication**

If you blank to visit your grandmother, you should go now; visiting hours will be ending soon.
*May 13, 2015*

**Math**

A grade six class is having a fundraiser. The class boys have three bags of apples. Each bag has 24 apples. The total cost of the three bags of apples is $12.24. The class sells the apples for 0.75 each. How much will the class gain per apple?
*May 7, 2015*

**Math**

A wheelchair ramp to a public building forms a 15 degree angle with ground and reaches a height of 2.3 metres above the ground. A) fill in these values on the diagram to the right. B) Label the length of the ramp, X . Then find its length ( to one decimal place)
*April 11, 2015*

**Math**

A room measures 3 m by 5 m. A scale drawing is to be made, using a scale of 1 cm=0.5. Find the dimensions of the scale drawing and provide sketch of this room drawn to scale.
*April 11, 2015*

**Math**

A rectangle has dimensions 4 ft by 6 ft. Show that if the length and width are doubled, the area is 4 times as large.
*April 11, 2015*

**Math**

Draw and label a diagram of each figure described below and calculate its volume. A) a sphere with a radius of 2 m. B) a cone with a diameter of 8 ft and height of 10 feet.
*April 11, 2015*

**Math**

Hi! Can someone help me with this? Thanks! Directions: Solve this equation by doing it twice; one time using the substitution method and one time using the graphing method. x – 2y = 0 3x – y^2 = 0
*March 2, 2015*

**Math**

Hi! Can someone help me with this? Thanks! Directions: Solve this equation by doing it twice; one time using the substitution method and one time using the graphing method. x + 2y = 1 5x – 4y = -23
*March 1, 2015*

**Math**

Find a way to estimate the time to flip a coin 10,000 times; 100,000 times.
*January 23, 2015*

**Math**

Hi! Can someone help me with these? I'm suppose to verify each idenity. Thanks! 1.) 1/tanθ +tanθ=sec^2θ/tanθ 2.) secθ-1/1-cosθ=secθ
*January 19, 2015*

**Math- Geometry**

Given: Angle ABC is a right triangle with hypotenus AB D,E and F are midpts of the sides of the triangle Proof: a. CDEF is a rectangle b. EC is half of AB
*December 11, 2014*

**Chemistry**

Balance the following equation in basic conditions CoCl2 (s) +Na2O2 (ag) ----> Co(OH)3 (ag)+Cl- (ag) + Na+ (ag)
*November 21, 2014*

**Chemistry**

I keep getting Mno2+4oh-+3fe3+ ->mno4-+3fe2++2h2o but it is saying incorrect
*November 21, 2014*

**Chemistry **

in a particular redox reaction, MnO2 is oxidized to MnO4– and fe3+ is reduced to fe2+. Complete and balance the equation for this reaction in acidic solution. Phases are optional.
*November 21, 2014*

**Chemistry**

How do you balance, step by step C2H5OH + K2Cr2O7 + H2SO4 = Cr2(SO4)3 + K2SO4 + CH3COOH + H2O?
*November 11, 2014*

**Chemistry**

step by step, show how to balance C2H5OH + K2Cr2O7 + H2SO4 = Cr2(SO4)3 + K2SO4 + CH3COOH + H2O
*November 11, 2014*

**Math Help**

The New York Times study of homes reported average house size in 2001 to be 2,428 square feet, compared with an average of 2,150 square feet in 1987. Suppose a study of homes over the years recorded the year from 1987 to the present, as well as the size of the house in square ...
*November 4, 2014*

**Math Help **

I really need help on this. I tried doing it on my own, but, I got stuck. Thanks! (a) List any approximate x-intercepts values. (b) Set y = 0 and solve the resulting equation; y=x^3-4x^2-25x+100.
*October 10, 2014*

**finance**

1.Bill and Warren are thinking about issuing 11 percent coupon bonds that will mature in 15 years. Market interest rates are 13 percent. What could they sell each of the bonds for?
*October 7, 2014*

**Pre-Calc**

Describe the difference between transformations and nonrigid transformations.
*September 26, 2014*

**Pre-Calc Help!**

@Mia, did I do this write? x^2-8x+15 (x + 3) (x + 5) x-5=0 x-3=0 The zeros would be x = 3 x = 5
*September 19, 2014*

**Pre-Calc Help!**

I really need help with this question. Thanks! Find the zeros of the function algebraically. Be sure to show all work. f(x)=x^2-8x+15 --------------- 10x
*September 19, 2014*

**Pre-Calc**

Find the zeros of the function algebraically. Show all work. f(x)=x^2-8x+15 ---------------- 10x
*September 18, 2014*

**science**

Mary is driving on a straight road. Suddenly a deer jumps out in front of her. Mary turns her car to the left to avoid the deer. Which best describes what happens to mary's head position if she is wearing her seatbelt? A) mary's head moves to the left b marys head ...
*August 27, 2014*

**Math**

390
*August 27, 2014*

**Chemistry**

if you dissolve 25.5 g of KBr in enough water to make 1.75 L of solution, what is the molarity of the solution
*May 13, 2014*

**Biology**

Describe how a monomer is the basic unit of all macromolecules.
*April 28, 2014*

**financial management**

A capital project has an initial investment of $100,000 and cash flows in years 1-6 of $25,000, $10,000, $50,000, $10,000, $10,000, and $60,000, respectively. Given a 15 percent cost of capital, •(a) compute the net present value. . •(b) compute the internal rate of...
*April 14, 2014*

**financial management**

2. If you have an opportunity cost of 10%, how much should you be willing to invest now to have $8,000 accumulated in 10 years?
*April 12, 2014*

**analytical chemistry**

Could someone please clarify. I recently sent this question to the forum and thought I had it figured out. Now another student has told me to do this: 35.7 ppm x 250ml = 8.925 x 10-3 g 8.925 x 10-3 g/4.272g=2.089 x 10-3 = 2089 x 10-6 = 2089ppm Please help I do not know what is...
*March 5, 2014*

**analytical chemistry**

Thanks so much. You are correct the answer should read 178.5 ppm.
*March 5, 2014*

**analytical chemistry**

Suppose a 4.272 g soil sample undergoes an extraction with 50 ml of extracting solvent to remove the lead. This 50 ml was then diluted to 250 ml and tested by atomic absorption technique. The concentration of lead in this diluted extract was found to be 35.7 ppm. What is the ...
*March 5, 2014*

**Algebra 2 Help!**

For number 4 would the answer be "1 real"? Cause the options were 1 real, 2 real, or 2 complex.
*February 28, 2014*

**Algebra 2 Help!**

1.) Simplify the expression. [sqrt3 + 2i][sqrt3 - 2i] 2.) Solve using the square root property. (y - 4)2 = -18 3.) Rewrite the the function in vertex form. You may use completing the square or an alternate method. f(x) = 5x2 - 10x + 3 4.) Use the Discriminant b2 - 4ac to ...
*February 28, 2014*

**math**

If you divide 3 oranges amongst 4 friends how much does each person get?
*February 12, 2014*

**Analytical chemistry**

How many grams of solid CuSO4. 5H2O are needed to prepare a 500 ml of a 1000 ppm solution of Cu?
*February 2, 2014*

**Fundamentals of Finance**

I've posted 2 different questions on the above mentioned and no one has helped with the questions, or if it was than how to I go about finding them. HELP! I'm so lost here!
*January 15, 2014*

**Fundamentals of finance**

"Genatron wants to estimate what will happen to its income before interest and taxes if its net sales change from the 2012 level of $1,500,000. Refer to Genatron’s 2012 income statement below, where the income before interest and taxes is $247,000 (EBT of $190,000 ...
*January 12, 2014*

**Fundamentals of finance**

"Estimate the weights (wi) for assets in the three portfolios given the following information about the portfolio holdings: " Price Number of securities Market value Portfolio weights Percentages to one decimal place a. Stock A $25 200 500 0.22522523 22.50% Stock B...
*January 12, 2014*

**Statistic**

Consider a football team for whom the numbers on the active players’ jerseys are 29, 41, 50, 58, 79,…, 10 (listed in alphabetical order of the players’ names). Does it make sense to calculate the mean of those numbers? Why or why not? 2. The Fair Isaac ...
*January 11, 2014*

**analytical chemistry**

Regarding ICP analysis 4. For each of the following electrical discharge sources list the major strengths and limitations: a. dc arcs, b. ac arcs, c. ac sparks.
*December 27, 2013*

**Math Help!**

Determine whether the relation is a function. {(4, 9), (-4, 9), (2, 3), (10, -5)}
*November 27, 2013*

**math**

[(-15)(-7)divided by (2-17)=
*November 18, 2013*

**maths**

I would really appreciate it if someone could answer this ASAP!
*November 16, 2013*

**maths**

What do they mean by using the equation about to show you found your answer?
*November 16, 2013*

**Maths**

Going off of the question I asked: How many miles, m, will each of the cars have on them when the numbers of weeks, w, is the same? Use the equation from Problem 2 Part A (the one above). Show how you found your answer. Thank you!!!!!
*November 16, 2013*

**math**

Please help!
*November 16, 2013*

**math**

This homework question was removed due to a copyright claim submitted by the National Network of Digital Schools Management Foundation (NNDS).
*November 16, 2013*

**Math**

Fill in the blank so that the numbers are evenly spaced. 101, _____, _____,1001
*November 12, 2013*

**5th grade math parent**

Fill in the blank so the numbers are evenly spaced. 101, _____, _____, 1001?
*November 12, 2013*

**BCIT**

A series of standard solutions of benzene in toluene solvent is to be prepared for an internal standard procedure with ethylbenzene serving as the internal standard. Tell how you would prepare the solutions, including the milliliters of benzene concentrations are to be 0.5%, 1...
*November 10, 2013*

**Chemistry**

A 0.110-L sample of an unknown HNO3 solution required 52.1 mL of 0.150 M Ba(OH)2 for complete neutralization. What was the concentration of the HNO3 solution?
*November 9, 2013*

**chemistry**

For the following chemical reaction write the net ionic equation, including the phases. 2HBr (aq) +Ba(OH)2(aq) --> 2H2O(l) +BaBr2 (aq)
*November 9, 2013*

**physics**

A light spring having a force constant of 130N/m is used to pull a 7.50kg sled on a horizontal frictionless ice rink. The sled has an acceleration of 2.50m/s^2? Part A: By how much does the spring stretch if it pulls on the sled horizontally? X=0.144m Part B: By how much does ...
*September 26, 2013*

**Chemistry**

When calcium carbonate is added to hydrochloric acid, calcium chloride, carbon dioxide, and water are produced. CaCO3 +2HCl yields CaCl2 +H2O +CO2 How many grams of calcium chloride will be produced when 29.0 g of calcium carbonate are combined with 13.0 g of hydrochloric acid...
*September 22, 2013*

**math**

A professor wants to supplement her pension with investment interest. If she invests $26,000 at 7% interest, how much more would she have to invest at 9% to achieve a goal of $4,160 per year in supplemental income?
*September 6, 2013*

**spanish II**

Has anyone taken Spanish 2 in summer school from apex? What was it like?
*June 2, 2013*

**math**

Find the mininum product of two numbers whose sum is 55
*May 19, 2013*

**Math**

You and six of your friends will go on a roadtrip. A seven passenger minivan is rented for the weekend. How many different ways can you and your friends sit in this vehicle?
*May 6, 2013*

**Calculus**

thank you!
*May 2, 2013*

**Calculus**

would it be possible to get the steps? or some sort of explanation?
*May 2, 2013*

**Calculus**

lim x->0 (sinx)^x
*May 2, 2013*

**economics**

19-1 Bicycle Insurance and Information Asymmetry If bicycle owners do not know whether they are high- or low-risk consumers, is there an adverse selection problem? 19-2 IPOs and Adverse Selection Should owners of a private company contemplating an IPO (a sale of stock to the ...
*May 2, 2013*

**economics**

19-1 Bicycle Insurance and Information Asymmetry If bicycle owners do not know whether they are high- or low-risk consumers, is there an adverse selection problem? 19-2 IPOs and Adverse Selection Should owners of a private company contemplating an IPO (a sale of stock to the ...
*May 2, 2013*

**math**

writing algebraic expressions: 1. there were 3 times more sugar cookies baked than chocolate chip cookies 2. the kids ate 10 fewer cookies than the number of pies they made to sell 3. kino & sandra made 12 more pounds of cookie dough than tommy
*April 11, 2013*

**Justice**

D) b and c
*April 10, 2013*

**math**

I am sorry i cant find a way to add a picture of the diagram
*April 1, 2013*

**math**

mr.periwinkle owns a ranch.he wants to add an area in the shape of an equilateral triangle to one of his rectangular fields.if the length of the rectangular field is 3x feet and its area is (9x^2-6x)square feet,write an equation for the amount of fencing needed to make the new...
*April 1, 2013*

**calculus optimization problem **

A farmer has 460 feet of fencing with which to enclose a rectangular grazing pen next to a barn. The farmer will use the barn as one side of the pen, and will use the fencing for the other three sides. find the dimension of the pen with the maximum area?
*March 30, 2013*

**calculus**

find the interval(s) where the following functions are increasing and decreasing. f(x)= x/4 + 4/x
*March 29, 2013*

**calculus**

suppose the quantity demanded per week of a certain dress is related to the unit price p by the demand equation p=sqrt800-x. write the function that describes the revenue function? To maximize revenue how many dresses should be made and sold each week?
*March 29, 2013*

**statistics**

Suppose that the heights of female adults in the US are normally distributed with a mean (µ) of 65.4 inches and a standard deviation (σ) of 2.8 inches. Let X denote the height of a randomly chosen adult female. Find the probability that X is between 66 and 70 inches:
*March 15, 2013*

**Computers**

Select the first step in the Informative Processing cycle. storage output input processing
*March 11, 2013*

**Business English**

Which of the following statements is essential about how the standard pattern for informative and posiive messgaes should be applied? Use all five of the elements of the basic organizational pattern present each element in a separate paragraph of its own Present the ...
*March 11, 2013*

**math**

when rolling a die, do you think everyone will have the same results
*March 2, 2013*

**Algebra**

T o convert from X degrees centigrade to y degrees fahrenheit the function is f(x) 9/5x +32 find the inverse function f of negative 1. what does the inverse function represent? graph Help me!
*February 27, 2013*

**science**

Why do manufacturing industries have more problems controlling pollution then other kinds of businesses have?
*February 26, 2013*

**College Physics PLEASE HELP**

A cylindrically shaped piece of collagen is being stretched by a force that increases from 0 to 3.0 x 10^-2 N. The length and radius of the collagen are 2.5 and 0.091 cm. Young's Modulus is 3.1 x 10^6 N/m^2. a.) If the stretching obeys Hooke's Law, what is the spring ...
*February 23, 2013*

**College Physics PLEASE HELP**

A spring stretches 0.150 m when a 0.30 kg mass is hung from it. The spring is then stretched an additional 0.100 m from this equilibrium point and released. Determine a). the spring constant, k, b). the maximum velocity of the mass, c. ) the maximum acceleration of the mass, d...
*February 23, 2013*

**Physics**

A femur is a bone in the leg whose minimum cross sectional area is about 4.0 x 10^-4 m^2. A compressional force in excess of 6.8 x 10^4 N will fracture this bone. A.) Find the maximum stress that this bone can withstand and B.) What is the strain that exists under a maximum ...
*February 23, 2013*

**Physics**

A cylindrically shaped piece of collagen is being stretched by a force that increases from 0 to 3.0 x 10^-2 N. The length and radius of the collagen are 2.5 and 0.091 cm. Young's Modulus is 3.1 x 10^6 N/m^2. a.) If the stretching obeys Hooke's Law, what is the spring ...
*February 23, 2013*

**Physics**

A spring stretches 0.150 m when a 0.30 kg mass is hung from it. The spring is then stretched an additional 0.100 m from this equilibrium point and released. Determine a). the spring constant, k, b). the maximum velocity of the mass, c. ) the maximum acceleration of the mass, d...
*February 23, 2013*

**algebra**

electricity costs 7.57 a month plus 8.77 per kilo watt hour for the first 400 kWhr and 6.574 per kWhr for all useage over 400 in a month. what is the cost for 300 kWhr? 2638 What is the cost of 700? 7.57+8.77 times 400 and 6.574 times 300? 5487.77 I think. I need to write a ...
*February 23, 2013*

**Chemistry**

Hydrogen peroxide solution, H2O2(aq), is available with a concentration of 1.667mol/L. When diluted to a concentration of 0.25mol/L, the solution is used as a disinfectant. What volume of water should be added to 100 mL of the concentrated hydrogen peroxide solution to prepare...
*February 21, 2013*

**Chemistry**

A laboratory stockroom has a stock solution of 90%(m/v) sulfuric acid,H2SO4(aq). If a technician dilutes 50ml of the stock solution to a final volume of 300ml, what will be the new mass/volume percent concentration?(HINT: the dilution formula can be used for concentration ...
*February 21, 2013*

**Canadian Law**

thxxxx:)ur cool!
*February 20, 2013*

**Canadian Law**

Can you find a canadian case where the defence of mental disorder is used in late 2012 ti early 2013? I searched soooooooooooooooooooooooooo much I couldnt find it anywhere on the internet.. Please help me thanks in advance:)
*February 20, 2013*