Tuesday

September 16, 2014

September 16, 2014

Total # Posts: 827

**Organic Chemistry**

Label each reactant according to it role or roles in the chemical reaction? Two different (OH-) + (HBr) ----> (HOH) + (Br-) (OH-) + (H3CBr) ----> (H3COH) +(Br-) Lewis base, bronsted base, nucleophile, lewis acid, bronsted acid, nucleophile
*September 15, 2014*

**Organic Chemistry**

Consider the resonance structures for the carbonate ion. O--C-O(-) l O(-) (-)O-C--O l O(-) (-)O-C-O(-) l l O How much negative charge is on each oxygen of the carbonate ion? A)0, B) -.33, C)-.50, D) -.67, E)-1.00, F)-1.33, G)-1.50, H)-1.67, I)-2.00 What is the bond order of ...
*September 15, 2014*

**CHEMISTRY**

if you copy the link from beginning to end itll paste easily into a search bar.
*September 7, 2014*

**CHEMISTRY**

Ch3CN(CH3)C2H5 is my kekule drawing ok? I drew it and uploaded a picture. oi61. tinypic . com/2vmztir.jpg
*September 7, 2014*

**calc**

Two paths represented by [x, z] = [-82.2, 43] +s [0.2, 1.7] and [x, y] =[-84.4, 45.5] +t [2.4 -0.9]. Determine the intersection of the two paths.
*July 6, 2014*

**Chem URGENT**

How much energy (in kilojoules) is released when 13.3g of steam at 114.5∘C is condensed to give liquid water at 67.0∘C? The heat of vaporization of liquid water is 40.67 kJ/mol, and the molar heat capacity is 75.3 J/(K⋅mol) for the liquid and 33.6 J/(K⋅...
*June 17, 2014*

**Pre-Algebra**

How would I also solve the following? f(x)=x^2-4+3 what is the output of f(-3)?
*June 3, 2014*

**Pre-Algebra**

n(n-1)-4 How do I solve stuff like this?
*June 3, 2014*

**English**

This piece focuses on the increase use of smartphones of youths in South Korea. Should I reword that phrase?
*May 14, 2014*

**math**

A Jewlery box has length of 3 and a half, a width if 1 and a half, and a height of 2 units. What is the volume if the box I cubic units? Each of the cubes in this activity has a side length of 1/2. How many cubes with side length 1/2 does it take to form a unit cube? How many ...
*May 6, 2014*

**us history**

can you check my answers please? The “silent majority” referred to A. conservative working- and middle-class citizens B. women C. a liberal coalition of ethnic minorities, women, the aged, and the poor D. the nation’s youth E. deaf-mutes in government programs I...
*April 28, 2014*

**Class Board**

Characteristics and talents that will make me a great leader and member of Class Board is that I am helpful. Helping with homework, simple tasks, struggles that one faces, or providing ideas is a way of how I exemplify this characteristic. I also enjoy doing volunteer work. ...
*April 24, 2014*

**Class Board**

Would volunteering be considered as a talent/characteristic?
*April 24, 2014*

**Class Board**

What characteristics and talents in addition to these do you possess that will make you a great leader and member of the class board and how do you exemplify those? I don't really understand the part where it says "exemplifies" what does that mean?
*April 24, 2014*

**Geometry**

In a garden, a birdbath 2ft 6 in. tall casts an 18-in. shadow at the same time an oak tree casts a 90-ft shadow. How tall is the oak tree?
*April 14, 2014*

**english essay**

ok
*March 26, 2014*

**english essay**

Ofcourse, I know Science and Chemistry are not issues but I want to know an issue related to this particular subject.I do not If you understood or not.
*March 26, 2014*

**english essay**

* I need help writing research essay. The topic is to write about an issue or problem that you want to change. Well, I am mostly interested in Science, particularly Chemistry and Nature.
*March 26, 2014*

**Math**

the directions for lemonade say to put 2 cups of liquid concentrate into one gallon of water. if olivia only wants to make one pint of lemonade, how many fluid ounces of concentrate should she put?
*March 23, 2014*

**biology**

I need help with what is happening inside the mitochondria. may help me what's happening 0-50 secondes. h t t p: // w w w.y o u t u b e.c o m / watch ?v=RrS2uROUjK4
*March 21, 2014*

**Pre-Algebra**

I don't have an account. It says that you need one
*March 7, 2014*

**Pre-Algebra**

How do you find the surface area of cones and cylinders?
*March 7, 2014*

**history **

As president, Grover Cleveland antagonized A. Western cattlemen and businessmen by restoring many acres of public lands to the federal government B. Democrats by putting many of his fellow Republicans into political positions C. Mugwumps by allowing “pension raids” ...
*March 1, 2014*

**us history **

The intellectual leader of the Social Gospel in America was my book speaks of William Rainsford, Washington Gladden, and Walter Rauscchenbusch but doesnt say who the actual leader is?
*March 1, 2014*

**us history**

Urban political bosses were often the largest source of assistance for city dwellers. true or false? this is true right?
*March 1, 2014*

**us history**

The growth of the railroads was a major cause of American expansion in the late nineteenth century. true or false? is this true?
*March 1, 2014*

**English**

correct the following sentence: elvis our cat play with his toy and then he played on the scratching post There are 6 errors but I could only find 5. Elvis, our cat played with his toy, and then he played on the scratching post.
*February 25, 2014*

**Math**

It is composed of 12 regular pentagonal faces.
*February 19, 2014*

**math**

thank you :)
*January 17, 2014*

**math**

Four runners ran the relay, Bill ran his lap in 22.738 seconds, Troy ran in 21.874 seconds, Grace ran in 20.32 second, and Jessica ran 19.047 seconds. Estimate the team's total time to the nearest tenth of a second
*January 17, 2014*

**math**

ok so it would be 4.25, 5, 6.5, 7.25
*January 17, 2014*

**math**

complete the sequence of numbers 4.25, 5, 5.75, _______, ______ ?
*January 17, 2014*

**math**

Writing to explain: The digit 5 is usually rounded up, but it can also be rounded down. How would you round the numbers in the equation 9.5 +4.7+3.2+7.5= to the nearest whole number without getting an overestimate or an underestimate?
*January 17, 2014*

**business math**

compute the amount of compound interest earned in 1 year for an investment of 1,000,000 with a nominal interest rate of 8% compounded quarterly.
*January 13, 2014*

**Science**

for the question 17 the answer is heat
*January 10, 2014*

**law**

judges in custody cases may interview the subject children outside the presence of the parents only if the attorneys are present? is this true or false
*December 10, 2013*

**Geometry**

Quadrilateral RUBY is a rectangle. Which of the following statements MUST be true? Check all that apply: [] All four of the sides of RUBY are equal. []All four of the angles of RUBY are equal. []RUBY has two pairs of parallel opposite sides.
*December 9, 2013*

**Calculus**

Gerber Banana Plum Granola costs $0.89 per 5.5-oz serving; each serving contains 140 calories, 31 g of carbohydrates, and 0% of the recommended daily allowance of vitamin C. Gerber Mixed Fruit Carrot Juice costs $0.79 per 4-oz serving; each serving contains 60 calories, 13 g ...
*December 2, 2013*

**Finance - Capital Budgeting/Cost-cutting**

Caradoc Machine Shop is considering a four-year project to improve its production efficiency. Buying a new machine press for $560,000 is estimated to result in $210,000 in annual pre-tax cost savings. The press falls into Class 8 for CCA purposes (CCA rate of 20 percent per ...
*December 1, 2013*

**Finance - Capital Budgeting/Bid Price**

We have been requested by a large retailer to submit a bid for a new point-of-sale credit checking system. The system would be installed, by us, in 89 stores per year for three years. We would need to purchase $1,300,000 worth of specialized equipment. This will be depreciated...
*December 1, 2013*

**Accounting**

Here is the income statement with all the numbers and accounts (This is a university in Canada by the way) i42. tinypic. com/ ws4i91. jpg (copy and paste without the spaces)
*November 23, 2013*

**Accounting**

I am doing a report on finding the major challenges in the future of my university with regards to their revenue and expenses. I have to discuss the main financial obstacles faced by the university and explain why each presents problems with future planning / budgeting. On the...
*November 23, 2013*

**Calculus - Integrals **

The projected rate of increase in enrollment at a new college is estimated by dE/dt = 6,000(t+1)^-3/2 where E(t) is the projected enrollment in t years. If the enrollment is 3,000 now (t=0), find the projected enrollment 15 years from now.
*November 21, 2013*

**algebra **

how do you find the x & y intercept of the equations y=-3 x=4 without graphing them?
*November 18, 2013*

**Calculus - Optimization **

A fence is to be built to enclose a rectangular area of 800 square feet. The fence along 3 sides is to be made of material $4 per foot. The material for the fourth side costs $12 per foot. Find the dimensions of the rectangle that will allow for the most economical fence to be...
*November 17, 2013*

**Calculus - Optimization **

A parcel delivery service a package only of the length plus girth (distance around) does not exceed 24 inches. A) Find the dimensions of a rectangular box with square ends that satisfies the delivery service's restriction and has a maximum volume. What is the maximum ...
*November 16, 2013*

**Calculus**

What would the derivative of c(x) = (10 - x) + 1.4*sqrt((x^2) + 25)
*November 15, 2013*

**Math**

Does an x and y intercept of 0 mean that there is no x or y intercept? Or is 0 an intercept?
*November 11, 2013*

**Calculus**

P(x) = 12x / (1-x) What are the critical points and where is P(x) increasing and decreasing?
*November 10, 2013*

**Calculus**

Find the critical points of f(x) = 0.05x + 25 + (180/x)
*November 10, 2013*

**Grd 12 Math**

Can someone please help me work out how to get to the answer of: tanx + tan (pi-x) + cot (pi/2+x) = tan (2pi-x)
*November 6, 2013*

**Calculus **

Given V(t) = 125,000e^(t/8) find V('t)
*November 3, 2013*

**Math - Derivatives/Logrithms**

An office machine is purchased for $6000. Under certain assumptions, its salvage value, V, in dollars, is depreciated according to a method called double declining balance, by basically 71% each year, and is given by V(t) = 6000(0.71)^t, where t is the time in years after ...
*November 1, 2013*

**Accounting - please check my answers**

Dogwood florist opened a business January 1st 2010. During 2010, they had the following transactions and economic events. For each of the transactions and economic events prepare the adjusting entries and show the related transaction entries at the date that each would be made...
*October 30, 2013*

**math **

the length of a rectangular garden plot is twice the width of the plot.if the fence around the garden is 600 ft long,what is the length of the garden plot?
*October 28, 2013*

**math**

i meant the last problem you typed
*October 25, 2013*

**math**

the problem is r^3r^4/r^-2r^-5
*October 25, 2013*

**math**

r^3r^-4/4^-2r^-5 i tried doing r^3/r^-2 x r-4/r-5 & got r^5,r^1 but the answer is r6, what am i doing wrong?
*October 25, 2013*

**math**

x^7/x^-4 my book says the answer is x11, but how? aren't you supposed to subtract the exponents when dividing?
*October 25, 2013*

**math**

9^-1/9 the formula for this is b^m/a^n but when you do it it doesn't equal 1/81?
*October 25, 2013*

**math**

3^-5/3^-2 becomes 1/3^5/1/3^2 the answer is 1/27, how did they get that? i need step by step to understand
*October 25, 2013*

**Math - Limits**

sorry, it's "t approaching to infinity"
*October 25, 2013*

**Math - Limits **

N(t) = 100t / (t + 9) where t >=0 Find lim x approaching to infinity N(t)
*October 25, 2013*

**Marketing**

Nevermind, I figured it out!
*October 25, 2013*

**Marketing**

I need help filling in the blanks for this price chain in marketing: Manufacturer's Price.............$15.55 Manufacturer's Variable Costs....$6.35 Manufacturer's $ Margin..........$9.20 Manufacturer's % Margin..........59.2% Wholesaler's Price...
*October 25, 2013*

**Math**

How do you find the intersection of the lines 5x + 2y = 60 and 3x + 2y = 45?
*October 24, 2013*

**Math**

A charter fishing company buys a new boat for $224,000 and assumes that it will have a trade-in value of $115,200 after 16 years. Find a linear model for the depreciated value V of the boat t years after it was purchased.
*October 23, 2013*

**Math - Limits/Derivatives**

If a price-demand equation is solved for p, then price is expressed as p = g(x) and x becomes the independent variable. In this case, it can be shown that the elasticity of demand is given by E(x) = - [g(x) / xg'(x)]. Use the given price-demand equation to find the values ...
*October 19, 2013*

**Math - Limits/Derivatives**

Suppose that for a company manufacturing calculators, the cost, revenue, and profit equations are given by C = 70,000 + 20x R = 300x - (x^2 / 20) P = R - C where production output in 1 week is x calculators. If production is increasing at a rate of 600 calculators per week ...
*October 19, 2013*

**algebra**

in the bible, a verse describes a circular pool at king solomon's temple, about 1000 B.C. The pool is said to be ten cubits across, "and a line of 30 cubits did compass it round about." what value of pie does this imply? don't understand the problem or why ...
*October 13, 2013*

**math**

why is every integer a rational number?
*September 29, 2013*

**math**

how do you figure out the pattern of 1,4,9,16?
*September 28, 2013*

**Math**

9x^4 - 148x^2 + 64
*September 28, 2013*

**Math - Functions**

r = -5x^2 + 73x Can someone show me the steps to complete the square for that equation? I don't really understand them.
*September 22, 2013*

**algebra**

4,7,12,19,28,39, I don't see one common difference & how would the next number be 52?
*September 16, 2013*

**algebra**

3,6,9,15, 24,39 what is the next number in the sequence & why? i know it's going by 3 but its skipping numbers so I'm not sure if it would be 45,48,51,54,57,60,or 63
*September 16, 2013*

**Calculus**

Find the slope of the functions graph at a given point. Then find an equation for the line tangent to the graph there. f(x)=2*square root of x. (1,2) Could someone please help me figure this one out?
*July 21, 2013*

**Statistics**

The table got messed up, but for each category, the first number is for males, and the second number is for females!
*June 15, 2013*

**Statistics**

A Youth Correction Center completed a study to explore the proportion of delinquent behaviour, according to birth order, among two groups of teenagers (males and females, age 12-17). The data are given in the table below. Determine whether there is a difference between male ...
*June 15, 2013*

**Math - Decimals**

Is 0.052 or 0.05 a bigger number?
*June 5, 2013*

**Math - Probability**

Annabelle wants to move to a new city. If her chance of getting a job in Montreal is 10%, and her chance of getting a job in Vancouver is 35%: 3a) What is the probability that Annabelle will be offered both jobs? 3b) What is the probability that she will only get one of the jobs?
*May 19, 2013*

**PreCalculus**

cotx + tanx=
*May 13, 2013*

**math**

Suppose Apple’s stock rose to $139 at the end of the week and it was up 4% from the previous week. What was the price of Apple’s stock at the previous week’s close?
*May 9, 2013*

**MATH**

Suppose a third world country in the last five years is now expanding their Internet access. If they went from 2.5% of their citizens having access to the Internet to 7.5% now having access, calculate the following: a) How many percentage points did they increase in access? b...
*May 9, 2013*

**immunology**

do monocytes derive from killer T cells?
*May 6, 2013*

**Chem**

cr(s)--->Cr^3(aq)+3e- and Pb2+(aq)+2e---->Pb(s) write a balanced equation Please help thanks
*May 5, 2013*

**Chemistry**

Zinc has three major and two minor isotopes. For this problem, assume that the only isotopes of zinc are the major ones, zinc-64, zinc-66, and zinc-68. The atomic mass of zinc-64 is 63.9291 Da, that of zinc-66 is 65.9260 Da, and that of zinc-68 is 67.9248 Da. Calculate the ...
*May 3, 2013*

**Matrices (math)**

0.433= (45.6*A) + (3.152*B) 0.3363= (11.92*A) + (37.675*B) Solve for A and B using matrices
*May 2, 2013*

**Chemistry**

Solve for A and B 0.433= (45.6*A) + (3.152*B) 0.3363= (11.92*A) + (37.675*B)
*May 2, 2013*

**math**

You need to hire a part-time associate to work 30 hours a week in your store. You have $250 in labor budget for the new associate each week. You just interviewed an excellent candidate for the position who has requested to be paid $9.00 per hour. Your average part-time ...
*May 2, 2013*

**Chem**

An electrochemical cell based on the decomposition of H2O2 can be constructed based on the half-reactions in the table below. Half-Reaction | Standard Reduction Potential, E° H2O2+ 2e- => 2 OH- | 0.88 V O2+ 2 H2O + 2e- => H2O + 2 OH- | -0.15 V (d) Calculate the value...
*April 23, 2013*

**Chem**

Ca(s) + 2H+(aq) → Ca2+(aq) + H2(g) An experiment is performed to determine the volume of hydrogen gas produced when calcium reacts with excess HCl(aq) as represented by the net ionic equation above. A 0.0720 g sample of pure calcium and a solution of 1.0 M HCl(aq) were ...
*April 23, 2013*

**AP Chem**

CH3CH2NH2(aq) + H2O(l) <-> CH3CH2NH3+(aq) + OH-(aq) Kb = 5.0e-4 Ethylamine, CH3CH2NH, a weak base reacts with water according to the equation above. A 50.0 mL sample of a ethylamine solution is found to have a pH of the solution 11.60. (a) Write the expression for the ...
*April 23, 2013*

**Science**

Explain why would a bottle that is left overnight with water is crack but a empty bottle would not.
*April 14, 2013*

**Scoence**

Explain why would a bottle that is left overnight with water is crack but a empty bottle would not.
*April 14, 2013*

**Macroeconomics**

GDP of a country is 6000 billion. Investment is 2100 billion. Government purchase is 300 billion. The country has a trade surplus of 200 billion. How much is consumption? Was there net capital inflow or outflow? Can someone help start me off for this?
*April 10, 2013*

**chemistry 1 help please!**

Write a chemical equation that shows how acid rain H2SO3 was produced from SO2 gas and water in a zip sealed bag? My chem. teacher never explained how to do this and I have several other questions on this type of subject. If you could help me out it would help me tremendously...
*April 9, 2013*

**Chem 1**

Write a chemical equation that shows how acid rain H2SO3 was produced from SO2 gas and water in a zip sealed bag? My chem. teacher never explained how to do this and I have several other questions on this type of subject. If you could help me out it would help me tremendously...
*April 9, 2013*

**Macroeconomics**

The money supply in Freedonia is $200 billion. Nominal GDP is $800 billion and real GDP is $400 billion. Assuming that velocity is stable, if real GDP grows by 10 percent this year, and if the money supply does not change this year, what is the change of price level?
*April 9, 2013*

**Algebra **

I have one question I really need help with. I know the partial sum process but my numbers dont seem to come out to what I think it should be. Find the partial sum S6 1. An=3n+2
*April 4, 2013*

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