Saturday

November 22, 2014

November 22, 2014

Total # Posts: 163

**Chemistry**

@DrBob222 thank you!
*November 16, 2014*

**Chemistry**

Please help me set up these problems. I have been staring at them for hours and I can't tell where I went wrong. Question: Consider the following reaction: CaCO3(s)→CaO(s)+CO2(g). Estimate ΔG∘ for this reaction at each of the following temperatures. (...
*November 16, 2014*

**Phisics**

Phisic
*November 6, 2014*

**Chemistry Physics**

so its setup like (20*1.00)*(90-50)+(20*1.00)*(90-50) = 1600g?
*November 5, 2014*

**Chemistry Physics**

How many grams of water at 20°C are necessary to change 800g of water at 90°C to 50°C?
*November 5, 2014*

**Math**

what you have to do is how many cm can go to a meters. which you use METER= cm/100.00
*November 5, 2014*

**TRIG WORD PROBLEMS**

from 25 feet away from the base of a building, the angle of elevation from the ground to the top of a building is measured 38 degrees. how tall is the building. WHat i did was put 25 feet on the base of the triangle the angle measurement oppsite and the longer leg x is this ...
*November 4, 2014*

**RIGHT TRIANGLE TRIG**

THAnk You DAMON
*November 4, 2014*

**RIGHT TRIANGLE TRIG **

a kite is being flown 150 yards of string. the kite has an angle of elevation with the ground 65 degrees. how high above the ground is the kite. I DONT KNOW HOW TO SET UP THE PROBLEM
*November 4, 2014*

**theory of interest**

1.Two investments are made at the same time. The first consists of investing 1550 dollars at a nominal rate of interest of 7.9 percent convertible semiannually. The second consists of investing 1450 dollars at a nominal rate of interest of 7.9 percent convertible daily. How ...
*October 25, 2014*

**physics**

a turntable rotates about a fixed axis, making one revolution in 10s . the moment of inertia of the turntable about it's axis is 1200kg/m^2 . a man of mass 80kg , initially standing at the center of the turntable, runs out along a radius. what is the angular velocity of ...
*October 17, 2014*

**THEORY OF INTEREST**

Suppose that a money market fund pays a nominal rate of interest of 8.7 percent convertible monthly. What is the equivalent nominal rate convertible quarterly?
*September 30, 2014*

**Economics**

What are welfare payment or consumer?
*July 23, 2014*

**social studies**

From the point of an environmentalist, which is probably the most significant argument against offshore drilling for oil?
*June 10, 2014*

**Grammar**

"passages" is plural, hence the plural of the "is" verbs.
*February 20, 2014*

**Language Arts**

14. A 16. A
*February 13, 2014*

**English 12**

"… I felt much better."
*February 12, 2014*

**English art**

Please, critique this critique: Very dramatic interactions in a world novel to me, with canine preening for competitive exhibition, following the emotions of the lead characters is exciting. This is no "Dog story", and Lassie wouldn't be noticed in the wings. ...
*February 9, 2014*

**English**

Thank you.
*February 9, 2014*

**English**

What is parallelism, please?
*February 9, 2014*

**computer programming**

In what language, please?
*February 7, 2014*

**The language of Art**

What's the question, please?
*February 7, 2014*

**algebra**

Yes. The difference of their ages is the key.
*February 7, 2014*

**algebra**

A man and a woman's ages total 98. He is twice as old as she was when he was her age now. What are their ages?
*February 7, 2014*

**english**

pry, or coax — certainly not "delude"
*February 7, 2014*

**English**

Well, I don't know what "…test for his logic." means; but, none of the "senses" you mention are evident.
*February 6, 2014*

**English Language Arts**

Yes. Perhaps "blemish" would be a better choice.
*February 6, 2014*

**ENGLISH**

Por nada!
*February 5, 2014*

**physics**

A shotgun!
*January 29, 2014*

**History**

How Mali Build 0n Ghana Empire
*November 7, 2013*

**Math**

3/4x^2 x 2x^2y x 23xy^3
*November 7, 2013*

**Polynomials**

Can someone please help me get the sum difference and product of this problem I am so lost x^3+ 2x-5∶ x^4-x^3+ 3x^2- 2x+3
*September 19, 2013*

**finance**

Suppose you pay $1000 into a savings account that pays 2% per year, compounded annually. How many years will would it take for the money in the account to double, to $2000? use "successive approximation."
*September 17, 2013*

**physics**

Suppose the straight-line distance between New York and San Francisco is 4.4 106 m (neglecting the curvature of the earth). A UFO is flying between these two cities at a speed of 0.69c relative to the earth. What do the voyagers aboard the UFO measure for this distance?
*July 8, 2013*

**Chemistry**

How do you differentiate between fluorene and acetanilide? Suggest procedures and steps involved other than melting point and chromatography.
*April 1, 2013*

**Chemistry**

How do you distinguish between fluorene and acetanilide? Suggest methods other than melting point and chromatography.
*March 28, 2013*

**math**

During an art contest at your school, you and a classmate each won blue ribbons for 1/3 of the pieces you entered in the contest. You won 2 blue ribbons and your classmate won 3 blue ribbons. Explain how this could be.
*January 29, 2013*

**ACT Math**

Carlos goes to a local deli for lunch and orders a sandwich. He needs to choose a bread, a meat, a vegetable, a cheese and a source. How many sandwich combinations are possible? Assume Carlos always pick only one item from each category. Bread: Italian, Rye, Wheat, White and ...
*November 13, 2012*

**English Analysis**

Reading The Stranger by the lovely Albert Camus. Just need help understanding this question: -After I listed some themes I explored, my teacher asks: "Given the themes you listed, are any conventions questioned based on the treatment of a given theme? Describe how one or ...
*October 9, 2012*

**Algebra**

Please let me know if I answered these correctly. thank you, #2. Add: 3p^2 – 5p – 4 and 9p^2 + 10p – 2 A. 12p2 + 15p – 6 B. 12p2 + 5p – 2 C. 12p2 + 5p – 6 D. 12p2 + 15p – 2 answer D ________________________ #7. (3x^2 – 2x – 1)(x^2...
*August 11, 2012*

**algebra**

You would add up all the numbers in the survey, then subtract that number by the number of people surveyed to get your answer.
*August 11, 2012*

**Implicit differentiation calculus**

ok so the final answer would b a) y' = -(y + 5x^4y^2 + 9x^2)/(x+2x^5y) and b) y' = -y sin x thank you SO much once again steve, my exam is in a couple of hours and this solution really helped me, im very thankful. thanks so much!!
*June 21, 2012*

**Implicit differentiation calculus**

thank for you so much steve!!! i just wanted to double check.. for (a) it is y' = - (y+5x^4y^2+9x^2)/(x+2x^5y) i was wondering if the last part of it (x+2x^5y) is it 2x^(5y) or 2x^5(y). im not sure if the "y" is in the exponent or not.
*June 21, 2012*

**Implicit differentiation calculus**

PLEASE HELP , I DON'T UNDERSTAND find dy/dx by implicit differentiation a) xy + x^5y^2 + 3x^3 - 4 = 1 b) lny = cos x thank you
*June 21, 2012*

**Calculus grade 12**

thank you for taking your time to answer my questions steve!
*June 21, 2012*

**Calculus grade 12**

find the slope of the tangent line to y^4 = 3x^2 - 2x at the point (1,1)
*June 21, 2012*

**Calculus grade 12**

hi, is that all for a? please let me know, thank you Maya
*June 21, 2012*

**Calculus grade 12**

find dy/dx by implicit differentiation a) xy + x^5y^2 + 3x^3 - 4 = 1 b) lny = cos x thank you
*June 21, 2012*

**Calculus grade 12**

hi i need help differentiating these.. 1. y = cos(3x^2 + 2x) 2. y = ln(3x^2 + 5) thank you
*June 21, 2012*

**English**

2 and 3
*June 9, 2012*

**math**

$24 lft a 15 percent tip how much total
*May 14, 2012*

**chemistry**

Can someone pleeeeeaaase explain Charle's law in a simple way.
*May 14, 2012*

**trig**

1.Ifg(x)=cos4x,find g'(pie/24). 2.Differentiate y=csc^2 pie*x
*February 25, 2012*

**college physics**

calculate the specific heat of 200g of substance whose temperature is 30 degree celcius if it is mixed with 200g of water heated in a 300g iron container at 100 degree celcius. the final temperature of the mixture is 98 degree celcius.
*February 14, 2012*

**college physics**

calculate the specific heat of 200g of substance whose temperature is 30 degree celcius if it is mixed with 200g of water heated in a 300g iron container at 100 degree celcius. the final temperature of the mixture is 98 degree celcius.
*February 14, 2012*

**college physics**

what is the force applied in the direction of the wire at a point attached to the patient in a traction system if the mass applied ius equal to 5kg.?
*February 14, 2012*

**College Algebra**

A rectangle field with area of 1,500,000 needs to be fenced. 2W+2L=5,000. solve for L and W
*December 15, 2011*

**Chemistry**

when 25.0 mL of a solution containing both Fe2+ and Fe3+ ions is titrated with 23.0 mL of 0.0200 M KMnO4 (in dilute sulfuric acid). As a result, all of the Fe2+ ions are oxidized to Fe3+ ions. Next, the solution is treated with Zn metal to convert all of the Fe3+ ions to Fe2+ ...
*December 15, 2011*

**Chemistry**

calculate the energy associated with a photon whose wavelength is 14.5*10^-8cm.
*October 31, 2011*

**accounting**

What generally accepted Accounting Principle(s) dominate the issue of asset valuation?
*October 18, 2011*

**math**

Estimate products of fractions. 2/9x26
*September 20, 2011*

**English**

1 and 2 are acceptable; 3 is ambiguous.
*June 13, 2011*

**Science**

were do the labels go for a 6th grade science project
*May 21, 2011*

**maths**

f(x)=ln(e^x-e^-x), x>0 By applying in turn the Composite and Quotient Rules, find derivative and second derivative. Thanks.
*May 17, 2011*

**maths**

The mean weight (1.0042kg)of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or more. Options ...
*May 17, 2011*

**maths**

Choose the THREE options that define sequences that do not converge. Options A P0 = 40, Pn+1 − Pn = 2.8 Pn (1− Pn/300) (n = 0,1,2, . . .) B P0 = 100, Pn+1 − Pn = 0.7Pn (1− Pn/480) (n = 0,1,2, . . .) C P0 = 250, Pn+1 − Pn = 2.4Pn (1− Pn/420...
*May 17, 2011*

**maths**

The variation in a population is modelled by the recurrence relation (Jn+1 0.9257 0.0208) (Jn) + (0.014) (An+1 0.0661 0.9767) (An) (0.056) where Jn and An are the sizes, in millions, of the subpopulations of juveniles and adults, respectively, n years after 1 January 2010. On ...
*May 17, 2011*

**maths**

The variation in a population is modelled by the recurrence relation (Jn+1 0.9257 0.0208) (Jn) + (0.014) (An+1 0.0661 0.9767) (An) (0.056) where Jn and An are the sizes, in millions, of the subpopulations of juveniles and adults, respectively, n years after 1 January 2010. On ...
*May 16, 2011*

**maths**

Choose the THREE options that define sequences that do not converge. Options A P0 = 40, Pn+1 − Pn = 2.8 Pn (1− Pn/300) (n = 0,1,2, . . .) B P0 = 100, Pn+1 − Pn = 0.7Pn (1− Pn/480) (n = 0,1,2, . . .) C P0 = 250, Pn+1 − Pn = 2.4Pn (1− Pn/420...
*May 16, 2011*

**maths**

The mean weight (1.0042kg)of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or more. Options ...
*May 16, 2011*

**maths**

f(x)=ln(e^x-e^-x), x>0 By applying in turn the Composite and Quotient Rules, find derivative and second derivative. Thanks.
*May 16, 2011*

**maths**

f(x)=ln(e^x-e^-x), x>0 By applying in turn the Composite and Quotient Rules, find derivative and second derivative.
*May 15, 2011*

**maths**

The mean weight (1.0042kg)of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or more. Options ...
*May 15, 2011*

**maths**

Choose the THREE options that define sequences that do not converge. Options A P0 = 40, Pn+1 − Pn = 2.8 Pn (1− Pn/300) (n = 0,1,2, . . .) B P0 = 100, Pn+1 − Pn = 0.7Pn (1− Pn/480) (n = 0,1,2, . . .) C P0 = 250, Pn+1 − Pn = 2.4Pn (1− Pn/420...
*May 15, 2011*

**maths**

The variation in a population is modelled by the recurrence relation (Jn+1 0.9257 0.0208) (Jn) + (0.014) (An+1 0.0661 0.9767) (An) (0.056) where Jn and An are the sizes, in millions, of the subpopulations of juveniles and adults, respectively, n years after 1 January 2010. On ...
*May 15, 2011*

**maths**

f(x)=ln(e^x-e^-x), x>0 By applying in turn the Composite and Quotient Rules, find derivative and second derivative. Thanks.
*May 14, 2011*

**maths**

The mean weight (1.0042kg)of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or more. Options ...
*May 14, 2011*

**maths**

Choose the THREE options that define sequences that do not converge. Options A P0 = 40, Pn+1 − Pn = 2.8 Pn (1− Pn/300) (n = 0,1,2, . . .) B P0 = 100, Pn+1 − Pn = 0.7Pn (1− Pn/480) (n = 0,1,2, . . .) C P0 = 250, Pn+1 − Pn = 2.4Pn (1− Pn/420...
*May 14, 2011*

**maths**

The variation in a population is modelled by the recurrence relation (Jn+1 0.9257 0.0208) (Jn) + (0.014) (An+1 0.0661 0.9767) (An) (0.056) where Jn and An are the sizes, in millions, of the subpopulations of juveniles and adults, respectively, n years after 1 January 2010. On ...
*May 14, 2011*

**maths**

Choose the THREE options that define sequences that do not converge. Options A P0 = 40, Pn+1 − Pn = 2.8 Pn (1− Pn/300) (n = 0,1,2, . . .) B P0 = 100, Pn+1 − Pn = 0.7Pn (1− Pn/480) (n = 0,1,2, . . .) C P0 = 250, Pn+1 − Pn = 2.4Pn (1− Pn/420...
*May 14, 2011*

**maths**

The variation in a population is modelled by the recurrence relation (Jn+1 0.9257 0.0208) (Jn) + (0.014) (An+1 0.0661 0.9767) (An) (0.056) where Jn and An are the sizes, in millions, of the subpopulations of juveniles and adults, respectively, n years after 1 January 2010. On ...
*May 14, 2011*

**maths**

Sorry for that. its 1.0042 kg
*May 14, 2011*

**maths**

The mean weight of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or more. Options for ...
*May 14, 2011*

**maths**

The mean weight of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or more. Options for ...
*May 13, 2011*

**maths**

Choose the THREE options that define sequences that do not converge. Options A P0 = 40, Pn+1 − Pn = 2.8 Pn (1− Pn/300) (n = 0,1,2, . . .) B P0 = 100, Pn+1 − Pn = 0.7Pn (1− Pn/480) (n = 0,1,2, . . .) C P0 = 250, Pn+1 − Pn = 2.4Pn (1− Pn/420...
*May 13, 2011*

**maths**

The variation in a population is modelled by the recurrence relation (Jn+1 0.9257 0.0208) (Jn) + (0.014) (An+1 0.0661 0.9767) (An) (0.056) where Jn and An are the sizes, in millions, of the subpopulations of juveniles and adults, respectively, n years after 1 January 2010. On ...
*May 13, 2011*

**maths**

Thats right. Thank you.
*May 13, 2011*

**maths**

The variation in a population is modelled by the recurrence relation (Jn+1 0.9257 0.0208) (Jn) + (0.014) (An+1 0.0661 0.9767) (An) (0.056) where Jn and An are the sizes, in millions, of the subpopulations of juveniles and adults, respectively, n years after 1 January 2010. On ...
*May 12, 2011*

**maths**

thanks
*May 12, 2011*

**maths**

The variation in size from year to year of a particular population can be modelled by an exponential model with annual proportionate growth rate 0.1246. The size of the population at the start of the initial year is 360. Choose the TWO options that give, as predicted by the ...
*May 12, 2011*

**maths**

Choose the THREE options that define sequences that do not converge. Options A P0 = 40, Pn+1 − Pn = 2.8 Pn (1− Pn/300) (n = 0,1,2, . . .) B P0 = 100, Pn+1 − Pn = 0.7Pn (1− Pn/480) (n = 0,1,2, . . .) C P0 = 250, Pn+1 − Pn = 2.4Pn (1− Pn/420...
*May 12, 2011*

**maths**

The variation in size from year to year of a particular population can be modelled by an exponential model with annual proportionate growth rate 0.1246. The size of the population at the start of the initial year is 360. Choose the TWO options that give, as predicted by the ...
*May 12, 2011*

**maths**

A sequence is defined by un = 2×(−0.5)n + 3 (n = 1,2,3, . . .). Choose the option that best describes the long-term behaviour of the sequence. Options A un becomes arbitrarily small (that is, un → 0 as n→∞). B un becomes arbitrarily large and ...
*May 12, 2011*

**maths**

The variation in size from year to year of a particular population can be modelled by an exponential model with annual proportionate growth rate 0.1246. The size of the population at the start of the initial year is 360. Choose the TWO options that give, as predicted by the ...
*May 11, 2011*

**maths**

The method for completing the square can be used to write the expression −2x^2 + 12x−5 in the form a(x + b)^2 + c, where a, b and c are constants. Choose the option that gives the value of c. Options A −23 B −13 2 C 5 2 D 3 E 13 F 14
*May 11, 2011*

**maths**

A sequence is defined by un = 2×(−0.5)n + 3 (n = 1,2,3, . . .). Choose the option that best describes the long-term behaviour of the sequence. Options A un becomes arbitrarily small (that is, un → 0 as n→∞). B un becomes arbitrarily large and ...
*May 11, 2011*

**maths**

The mean weight of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or more. Options for ...
*May 11, 2011*

**maths**

By first applying the Product Rule, choose the option that gives (correct to two decimal places) the overall maximum value of the function f(x) = e^3x cos(2x) on the interval [1/12 π, 1/4π]. Options A 0.49 B 1.90 C 2.19 D 2.42 E 3.97 F 5.88 G 7.46 H 10.55
*May 11, 2011*

**maths**

Choose the option that gives an expression for the indefinite integral ʃ (cos(4x) + 2x^2)(sin(4x) − x) dx. In each option, c is an arbitrary constant. Options A cos(4x) + 2x^2 +c B -1/8cos(4x) + 2x^2)^2 +c C 1/4 (sin(4x) − x)^2 + c D (1/(2 (sin(4x) − x...
*May 11, 2011*

**maths**

Choose the option that gives (correct to two decimal places) the area of the region which is bounded by the x-axis and by the graph of y =(20(7 − x)(x − 3))/x^2 . Options A 0.47 B 1.31 C 2.09 D 3.76 E 5.12 F 6.55 G 8.20 H 9.46
*May 11, 2011*