Tuesday
October 21, 2014

Posts by Mark


Total # Posts: 1,255

Quantum physics
Someone know answers for 7th and 10th? Attempts are finishing :(
September 8, 2013

Literature
I'm not sure how to write it. I've learned about irony, foreshadowing, symbolism, etc.
September 6, 2013

Literature
HELP PLEASE!!! Can you state the aspect of style revealed in this quote so I can write a paper? "Clyde if I could only die. That would solve all this. And I have prayed and prayed that I would lately, yes I have. For life does not mean as much to me now as when I first ...
September 6, 2013

literature
HELP PLEASE!!! Can you state the aspect of style revealed in this quote so I can write a paper? "Clyde if I could only die. That would solve all this. And I have prayed and prayed that I would lately, yes I have. For life does not mean as much to me now as when I first ...
September 6, 2013

English
The flames slowly grow stronger. Is the word "stronger" used as an adverb modifying the verb "grow."
September 3, 2013

English
Except for a dog he is traveling completely alone. How many adverbs are there? I know "completely " is one . Does it modify is traveling?
September 3, 2013

English
In this sentence -- In this story, a nameless character goes outdoors on a terrible cold day in the Yukon. How many adverbs are there and what do they modify? Is it just "outdoors" and it modifies "goes"
September 3, 2013

Literature
I really need HELP!!! I need a quote for personal connection in American Tragedy by Theodore Dreiser and an explanation of the quote.
August 31, 2013

Stats
A study found that for adults the general self-efficacy scale mean score was 35 and standard deviation was 12. A group of clients (n=14) was measured for their general self-efficacy with the same measure and found having 40 with standard deviation of 20. A group of therapist ...
August 17, 2013

programming Visual Command Prompt
This is the question that I have to do can someone please help?! QUESTION 2 - MANDATORY The file savings.txt contains the names and savings of 3 Bank customers in the last four months. Month1 Month2 Month3 Month4 Dennis Daly 480 620 57 73 Brid Jones 82 61 550 65 Mary Henry 49 ...
August 14, 2013

Psychology
A!! thank you!
July 26, 2013

Psychology
Phyllis is anxious to ride the parachute drop at the park. Her friend, Betsy, feels faint at the thought and does not enjoy watching others ride. These different reactions demonstrate that _______________. 
 A. perception of stress varies among individuals&#...
July 26, 2013

Psychology
Ralph was the third child born to a family of seven. At times his mother confused his name with those of his five brothers. His was never the tallest, the strongest, the fastest, or the smartest in school. He was also too little to do something or too old to be "acting ...
July 26, 2013

Math
In the Capital Asset Pricing Model, the market risk premium is estimated over a long period of time because: A. more data is always better than less. B. a longer holding period gives a more reliable estimate because it is, in effect, a larger sample size. C. almost all ...
July 21, 2013

Math
In the Capital Asset Pricing Model, the market risk premium is estimated over a long period of time because: more data is always better than less. a longer holding period gives a more reliable estimate because it is, in effect, a larger sample size. almost all investors hold ...
July 21, 2013

General Math
A. rx is the return for a market index such as the S&P 500 Index. B. rx is the return for the stock being analyzed for example, IBM s return if we are estimating IBM s beta. C. the slope measures the average return for the market portfolio for each percentage change in the ...
July 21, 2013

Finance
I think that it is B the risk rate of return plus a risk premium
July 21, 2013

Finance
A. as the highest return a risk-averse investor wants from an investment. B. as the risk-free rate of return plus a risk premium. C. as the historical rate of return plus a risk premium. D. as a comparison between the expected and historical rates of return
July 21, 2013

Maths
this question is incomplete.
July 20, 2013

Math
Brilli the ant has a block of cheese that is in the shape of an equilateral triangle. She is hosting a party, and has invited her two-legged house mates. She insists that all of her guests get a piece of cheese that is in the shape of an isosceles triangle. What is the maximal...
July 16, 2013

Math
In triangle ABC, D is the midpoint of BC. E is the foot of the perpendicular from C to AD. If CD=7√,DE=3√, what is the measure (in degrees) of ∠BED?
July 15, 2013

Math
Brilli the ant has a block of cheese that is in the shape of an equilateral triangle. She is hosting a party, and has invited her two-legged house mates. She insists that all of her guests get a piece of cheese that is in the shape of an isosceles triangle. What is the maximal...
July 15, 2013

Math
Let ABCDEF be an equiangular hexagon with perimeter 98 such that EF=2CD=4AB and BC=2FA. What is the length of EF?
July 15, 2013

Math
How many {(1,1),(1,−1),(2,0)}-lattice paths are there from the point (0,0) to the line x=8? Details and assumptions A lattice path is a path in the Cartesian plane between points with integer coordinates. A step in a lattice path is a single move from one point with ...
July 15, 2013

Physics
You bounce on a huge trampoline and start oscillating up and down with a period of 3 s. After a long while, you come to rest but the trampoline below you is displaced below its natural height. How much is the trampoline bent in m? Model the trampoline as a spring.
July 15, 2013

Math (algebra)
Let x and y be real numbers satisfying 4x^2+5y^2=1. Over all such pairs, let the maximum and minimum values of 2x^2+3xy+2y^2 be M and N respectively. If M+N+MN=a/b, where a and b are coprime positive integers, what is the value of a+b?
July 15, 2013

Essay
Can someone help me please I have to write a essay on if you won a million dollars and cannot spend it on yourself or family what would you do with it. I need help to start it just the opening line please
July 12, 2013

Math (please help me Steve)
The squares of a 3×3 grid are filled with non-negative integers such that the sum of each row and the sum of each column is 7. How many different ways can the squares be filled? The numbers in each grid square does not need to be distinct. Rotations and reflections are ...
July 8, 2013

Physics (help steve)
no, it's wrong
July 8, 2013

Physics (help steve)
A boy is spinning on a chair and holding a paper bag so that it is horizontal, and perpendicular to the axis of the rotation. What should be the angular velocity of the boy in radians/second so that the bottom of the bag breaks? Details and assumptions Assume paper breaks at ...
July 8, 2013

Math (please help steve)
The squares of a 3×3 grid are filled with non-negative integers such that the sum of each row and the sum of each column is 7. How many different ways can the squares be filled? The numbers in each grid square does not need to be distinct. Rotations and reflections are ...
July 8, 2013

Math (algebra)
For every positive integer n, consider all monic polynomials f(x) with integer coefficients, such that for some real number a x(f(x+a)−f(x))=nf(x) Find the largest possible number of such polynomials f(x) for a fixed n<1000.
July 8, 2013

Math
The squares of a 3×3 grid are filled with non-negative integers such that the sum of each row and the sum of each column is 7. How many different ways can the squares be filled? The numbers in each grid square does not need to be distinct. Rotations and reflections are ...
July 8, 2013

Calculus
A spherical fish tank of radius 8 meters is being filled with at a constant rate of Rπ meters cube of water per second. At height 3 meters, the rate of change of the height is 1 meter per second. What is the value of R?
July 7, 2013

Calculus
Let V be the volume of the three-dimensional structure bounded by the region 0≤z≤1−x^2−y^2. If V=a/bπ, where a and b are positive coprime integers, what is a+b?
July 7, 2013

Calculus
Let R be the region bounded by y=−3(x−1)(x−3) and the x-axis. Let S be the solid obtained by rotating R about the y-axis. The volume of S is given by Nπ. What is the value of N?
July 7, 2013

Calculus
There are two points P=(a,a^2) and Q=(b,b^2) (a<b) moving along the parabola y=x^2. If the area of the region bounded by y=x^2 and the line segment PQ is always 36, what is the value of lim as a→∞ of PQ/a?
July 7, 2013

Chemistry
A metal crystallizes in a face-centered lattice. The radius of the atom is 198pm and the density of the element is 6.57g/cm^3. What is the identify of the metal?
July 1, 2013

Chemistry
Bulb A is 100 mL and contains Helium at 1 atm. Bulb B is 500 mL and contains Argon at 2 atm. The bulbs are connected together by a valve. What is the pressure of gas A after the valves are opened? (assume constant temperature)
June 24, 2013

chem
What will be the final volume of a 425 mL sample of gas initially at 22 degrees C and 1 atm pressure when the temperature is changed to 30 degrees C and the pressure to 0.471 atm?
June 24, 2013

MATHS
remember me stupid boy
June 17, 2013

MATHS
thats my friend
June 17, 2013

math
Angle P and Q are a linear pair. Angle Q is 36 degree less than twice of angle P. The measure of angle P is ? degree, and the measure angle Q is ? degree.
June 12, 2013

Physics
7) An apple falls from a tree (h = 9m). In the absence of air resistance, how fast is it traveling when it strikes the ground?
June 5, 2013

Science
7) An apple falls from a tree (h = 9m). In the absence of air resistance, how fast is it traveling when it strikes the ground?
June 5, 2013

math
Determine the area of the region between the curves: f(x) = -(3)x^3 + (6.25)x^2 + (27.1875)x - (9.328125) and g(x) = (1)x^2 + (3)x -(3)
May 26, 2013

Math
Determine the area of the region between the curves: f(x) = -3x^3 + 6.25x^2 + 27.1875x - 9.328125 and g(x) = 1x^2 + 3x -3
May 26, 2013

Math
Determine the area of the region between the curves: f(x)= 3x^2 + 16x + 28 and g(x) = -2x + 1
May 26, 2013

science grade 8
Please, explain why do you think that blowout preventer (BOP)was likely a hydraulic system (in the 2010 Deep Water Horizon oil spill accident), and what are the advantages and disadvantages of this hydraulic system in the Deep Water Horizon oil spill. Give an example from this...
May 23, 2013

social studies
Payment to workers, his dependents,and/ or survivorsin the event of retirement, disabilityor death are generally covered by the system of insurance known as ?
May 22, 2013

History
Thanks Ms. Sue, very helpful
May 22, 2013

Hisory
Why is the Benghazi Attack such a controversy? I need to answer this in a few sentences which I am having a hard time doing. I wrote my paper but I can't seem to summarize it.
May 22, 2013

Math - PLEASE HELP
Can someone help me answer this? Determine F ' (x) and F ' (1) if F(x) = integral sign lower limit = 4, upper limit = x 4t^10 (2 t^(1) 0 + 8 ln t) ^4 dt a) F ' (x) = b) F' (1) =
May 20, 2013

Math
Can someone help me answer this? Determine F ' (x) and F ' (1) if F(x) = integral sign lower limit = 4, upper limit = x 4t^10 (2 t^(1) 0 + 8 ln t) ^4 dt a) F ' (x) = b) F' (1) =
May 19, 2013

math
Sorry I posted this question earlier with a error. Can anyone help me solve this now? Can someone help me answer this? If a < 5 the define integral [a, 4] 2.4e^(1.4x)dx = 44 Find the value a Define integral = integral sign a = lower limit 5 = upper limit
May 19, 2013

math
Can someone help me answer this? Determine F ' (x) and F ' (1) if F(x) = integral sign lower limit = 4, upper limit = x 4t^10 (2 t^(1) 0 + 8 ln t) ^4 dt a) F ' (x) = b) F' (1) =
May 19, 2013

math
Can someone help me answer this? If a < 5 the define integral [a, 4] 2.4e^(1.4x)dx = 44 Find the value a Define integral = integral sign a = lower limit 4 = upper limit
May 19, 2013

math
Can someone please help? Solve the differential equation dy/dx = 6xy with the condition y(0) = 40 Find the solution to the equation y= ______
May 19, 2013

chemistry
Consider what happens to Ag2CO3 in aqueous solution. It dissociates as thus: Ag2CO3 --> 2Ag^+ + CO3^2- Now think about reactions of CO3^2- with water. The problem says to ignore Ag+ subsequent reactions. H2O <-> H3O^+ + OH^- CO3^2- + H3O^+ <-> HCO3^- + H2O HCO3...
May 19, 2013

math grade 8
Hi! I have to sketch 3D shape of the house using triangular prism, rectangular prisms, cube, and cylinder.I have to include measurement calculations with formulas. I already did it all, but someone told me that the SA (surface area) of my house calculated wrong. What I did is...
May 19, 2013

mathematic
0.06
May 18, 2013

U.S/history AP
I think the answer to number one is annexation.
April 16, 2013

Algebra
The value, V< of Juan's investment portfolio can be modeled by the equation V=16t^2-256t+16,000. When will Juan's investment portfolio be worth $16.576.00?
April 8, 2013

Algebra
The value in dollars, V, of a certain stock can be modeled by the equation V=-16+88t+101, where t represents the time in months.When did the stock become worthless?
April 8, 2013

Biochem
What is the maximum amount of ethanol (in millimoles) that could theoretically be produced under the following conditions? Condition: A cell-free yeast extract is placed in a solution that contains 3.50 × 102 mmol glucose, 0.30 mmol ADP, 0.30 mmol Pi, 0.60 mmol ATP, 0....
April 3, 2013

Math (Percentage)
In a class of 40 , 12 students failed the exam. What was the passing rate of the said class?
April 3, 2013

Math (Percentage)
In a class of 40 , 12 students failed the exam. What was the passing rate of the said class?
April 3, 2013

Math (Algebra)
A jar contains x nickels and y quarters only. What percentage of the total number of coins are quarters?
April 3, 2013

Math
A newly designed international airport is planning to label its gates. Each gate must be assigned a letter from the alphabet from A to M (13 in all), and a number from 1 to 15. To avoid confusion, any two gates must be assigned a different letter, or a different number (or ...
April 3, 2013

Math
A newly designed international airport is planning to label its gates. Each gate must be assigned a letter from the alphabet from A to M (13 in all), and a number from 1 to 15. To avoid confusion, any two gates must be assigned a different letter, or a different number (or ...
April 2, 2013

physics
A bridge is supported at both ends (500m between supports). A Car (250 Kg) is at 100m from the left support. A truck (4000 Kg) is at 200m from the left support. Find the forces on the supports
March 28, 2013

Science help
D. All of the above
March 25, 2013

math problem
A piece of wire 24 cm long is cut into two pieces and each piece is bent to form a square . Find the lenght of each piece of wire in order to maximize the sum of the area of the two squares?
March 21, 2013

chem
This question has already been posted. Please don't flood the site with repetitive posts. The tutors work very hard to answer as many as they can.
March 14, 2013

Chemistry
Thank you Mr. Devron! I learnt something from you as well. The compound is Antimony Pentoxide, and I did indeed not realize that after dividing by the lowest moles you can multiply!
March 14, 2013

Chemistry
You need to know the molar ratio for Antimony Oxide! Since Sb has an oxidation of +3 and Oxygen has a oxidation of -2, you need two Sb atoms and three O atoms. Sb2O3 Figure out how many moles you have of antimony and oxygen.. 51.5 g Sb * 1 mol/ 121.76 g= 0.43 moles Sb 16.9 g O...
March 14, 2013

Is this correct?
Thank you.
March 14, 2013

Is this correct?-Mean value Theorem
Sorry I forgot to include the topic.
March 14, 2013

Is this correct?
What values (c) if any are predicted by the mean value theorem for the function f(x)= (x-2)^3 on the interval [0,2]? I got x= 4 and x=0, since x=0 is within the interval I chose that as my answer. Thank you.
March 14, 2013

Chemistry
You will have to find the molar mass here.. 200 ml * 0.1 mol/ L * 1 L/ 1000 mL= 0.02M 250 ml* 0.2M/ L * 1L/ 1000 mL= 0.05M N I somehow feel this problem is incomplete or either I am unable to understand the chemical compound name. Is there anymore to it?
March 14, 2013

Slope- Derivative
Thank you!
March 14, 2013

Slope- Derivative
Find the slope of f(t)= sqrt((1-sin (2t)) a) at point (0,1) i got -1 b) at origin i got 1 is this right thanks
March 14, 2013

Derivative-Word Problem
I read more about related rates, and have now understood these types of problems. Thank you!
March 14, 2013

Derivative-Word Problem
Volume in liters of antifreeze remaining in a leaking radiator after t minutes is V= 20- 2t- 0.1t^2 a) how long does it take to drain the antifreeze mixture from the radiator? i got t= 10 b) how fast is volume changing when t=5? i got 9.75 is this right. thanks
March 14, 2013

Word Problem-Calculus
My fault lied in plugging in directly. Thank you for showing me the steps.
March 14, 2013

Word Problem-Calculus-Already Solved-Please check?
Thank you!
March 14, 2013

Word Problem-Calculus
A spherical balloon is being inflated in such a way that its radius increases at a rate of 3 cm/min. If the volume of the balloon is 0 at time 0, at what rate is the volume increasing after 5 minutes? my answer is 45 cm/min. is this right. thanks
March 14, 2013

Cos-Derivative
Thanks!
March 14, 2013

Cos-Derivative
y= (cos^3 x) (cos 3x) I got -3 sin(3x) cos^3x - 3 sin(x) cos (3x) cos^2 (x) using the product rule Is this right? Thanks.
March 14, 2013

Derivatives
I have taken that into consideration; thank you!
March 14, 2013

Derivatives
I got 12 sin (3x-1)^2 cos (3x-1)^2 * (3x-1) as my final answer. Is this in the correct simplified form ?
March 14, 2013

Derivatives
I'm not sure if this is correct. Can someone clarify thanks.
March 14, 2013

Derivatives
what is derivative of sin^2 (3x-1)^2 ? dy/dx (sin^2 (x))= 2 sin x cos x dy/dx (3x-1)^2= 6(3x-1) chain rule? = 2 sin ((3x-1)^2) cos ((3x-1)^2) * 6(3x-1) Please help. Thank you
March 14, 2013

Math: Please check
This is correct!
March 14, 2013

Math: Please check
W= 5L So the side lengths are 5L and L. by definition of a right triangle (5L)^2 + (L)^2= ? 25L^2 + L^2= 26L^2 This matches choice C.
March 14, 2013

math problem
- Mr. Hermann, a stamp collector , sold 2 stamps for $5000 each. Based on his cost , he made a 25% profit on one stamp and lost 20% on the other stamp. What was Mr. Hermann's total loss on the two transactions? - There are five chidren in the Roberts family. Amy and Ariel ...
March 13, 2013

Pleass Help With MATH
Read this story to answer the following questions: Diego is building an architectural rendering of a house. For a portion of the roof, Diego cuts and folds a net for a triangular prism. the base of the prism is an isoceles triangle. the triangle has a base of 24 inches and a ...
March 6, 2013

3rd math
2 53 x7 371 No rick is not correct because 53x7=371
March 6, 2013

mAth
story: Diego is building an architectural rendering of a house. For a portion of the roof, Diego cuts and folds a net for a triangular prism. the base of the prism is an isoceles triangle. the triangle has a base of 24 inches and a height of 5 inches. the distance between the ...
March 6, 2013

Statistics
The rate of chlamydia infection was reported as 2.78% in a recent year. Under certain conditions, a preliminary screening test for the chlamydia bacterium is correct 96% of the time. One person is randomly selected from the population. find the true positive. Can someone ...
March 6, 2013

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