Friday

August 1, 2014

August 1, 2014

Total # Posts: 824

**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.

**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⋅...

**Pre-Algebra**

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

**Pre-Algebra**

n(n-1)-4 How do I solve stuff like this?

**English**

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

**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 ...

**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...

**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. Ev...

**Class Board**

Would volunteering be considered as a talent/characteristic?

**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?

**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?

**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.

**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.

**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?

**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

**Pre-Algebra**

I don't have an account. It says that you need one

**Pre-Algebra**

How do you find the surface area of cones and cylinders?

**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” o...

**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?

**us history**

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

**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?

**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.

**Math**

It is composed of 12 regular pentagonal faces.

**math**

thank you :)

**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

**math**

ok so it would be 4.25, 5, 6.5, 7.25

**math**

complete the sequence of numbers 4.25, 5, 5.75, _______, ______ ?

**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?

**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.

**Science**

for the question 17 the answer is heat

**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

**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.

**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 o...

**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 ye...

**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...

**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)

**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...

**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.

**algebra **

how do you find the x & y intercept of the equations y=-3 x=4 without graphing them?

**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...

**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 volum...

**Calculus**

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

**Math**

Does an x and y intercept of 0 mean that there is no x or y intercept? Or is 0 an intercept?

**Calculus**

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

**Calculus**

Find the critical points of f(x) = 0.05x + 25 + (180/x)

**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)

**Calculus **

Given V(t) = 125,000e^(t/8) find V('t)

**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 purc...

**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...

**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?

**math**

i meant the last problem you typed

**math**

the problem is r^3r^4/r^-2r^-5

**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?

**math**

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

**math**

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

**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

**Math - Limits**

sorry, it's "t approaching to infinity"

**Math - Limits **

N(t) = 100t / (t + 9) where t >=0 Find lim x approaching to infinity N(t)

**Marketing**

Nevermind, I figured it out!

**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................

**Math**

How do you find the intersection of the lines 5x + 2y = 60 and 3x + 2y = 45?

**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.

**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 ...

**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 whe...

**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 th...

**math**

why is every integer a rational number?

**math**

how do you figure out the pattern of 1,4,9,16?

**Math**

9x^4 - 148x^2 + 64

**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.

**algebra**

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

**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

**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?

**Statistics**

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

**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 an...

**Math - Decimals**

Is 0.052 or 0.05 a bigger number?

**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?

**PreCalculus**

cotx + tanx=

**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?

**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)...

**immunology**

do monocytes derive from killer T cells?

**Chem**

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

**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 ato...

**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

**Chemistry**

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

**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 associa...

**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...

**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 u...

**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 eq...

**Science**

Explain why would a bottle that is left overnight with water is crack but a empty bottle would not.

**Scoence**

Explain why would a bottle that is left overnight with water is crack but a empty bottle would not.

**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?

**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!...

**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!...

**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?

**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

**Algebra please**

I have two left I need help with and dont understand. Find the partial sum S6 1. An=3n+2 2. Find the number of terms n in an arithmetic sequence if a1=20, d=5, and An=75.

**Algebra**

Thanks for the help bobpursley and Reiny I appreciate showing how you got to it so I can also do it.

**Algebra **

I have 3 questions I'm stuck on and would love for someone to explain and show me how to solve them so I can also solve the other one. Find the partial sum S6 1. An=3n+2 2. Find the number of terms n in an arithmetic sequence if a1=20, d=5, and An=75. 3. Find the general t...

**Algebra **

I have a few problems I need some help with. The first is Evaluate the sum. 1. There is an E like symbol on the top is 10 on the bottom n=1 and to the right (7-2n) 2. The next question is find a10 for an arithmetic sequence with a1=6 and d=10 3. Find the number of terms in the...

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