Sunday

August 28, 2016
Total # Posts: 7,879

**maths**

In an AP the first term is 2 and the nth term is 29 and the sum of the n term is 155 find n
*April 22, 2013*

**physics**

suppose that there are 1.9*10^25 stars in the universe. how many moles of stars would this be?
*April 22, 2013*

**physics 70**

d) F = ma (in the 'y' direction) *ball at bottom mean 'T' is upward and 'mg' is downward* T - mg = ma T - mg = m(v^2/r) (r(T - mg))/m = v^2 v = sqrt((r(T - mg))/m) v = sqrt((.85(22.5 - (.275*9.8))/.275) v = 7.82 m/s
*April 21, 2013*

**physics 70**

c) F = ma (in the 'y' direction) *ball at top means 'T' and 'mg' are pointing "downward"* -T -mg = ma -T = mg + ma T = -mg -ma T = -m(g + v^2/r) T = -.275(9.8 + (5.20^2/.85)) T = -11.4 N, or, 11.4 N downward
*April 21, 2013*

**Chemistry**

Assume you dissolve 0.235 g of the weak acid benzoic acid, C6H5CO2H, in enough water to make 4.00*10^2 mL of solution and then titrate the solution with 0.138 M NaOH. C6H5CO2H(aq) + OH-(aq) C6H5CO2-(aq) + H2O(l) Find concentration of Na+ at equivalence point.
*April 21, 2013*

**Chemistry**

Calculate the H3O+ ion concentration and the pH at the equivalence point when 45.0 mL of 0.4000 M NH3 is mixed with 45.0 mL of 0.4000 M HCl. Ka=5.6x10-10
*April 21, 2013*

**Chemistry**

Calculate the H3O+ ion concentration and the pH at the equivalence point when 45.0 mL of 0.4000 M NH3 is mixed with 45.0 mL of 0.4000 M HCl. Ka=5.6x10-10
*April 21, 2013*

**Physics**

1. Ohm's Law states that for some circuits the voltage is proportional to the current. In other words, if you double the voltage, you will double the current. Which of these equations agrees with this statement of Ohm's Law? (∝ means "is proportional to"...
*April 18, 2013*

**Statistics**

The design tolerance thickness for an automotive part is 55mm to 65mm. If the process mean thickness is 61mm with a standard deviation of 2.3mm, then what percentage of the sheets will be acceptable?(What percentage will fall within the design tolerence?) Assume that the ...
*April 18, 2013*

**News opinion a**

- The driver of an Okaloosa County EMS ambulance passed out before he caused a five-vehicle crash at Mary Esther Cut-Off and Wright Parkway on Tuesday evening, according to police. David M. Keller, 40, of Baker, was talking with his partner as he drove the ambulance south on ...
*April 18, 2013*

**finance**

. Fargo Industries has outstanding 30 year bonds at 7% semiannual payments. The bond sells at 90% of its face value. If their tax rate is 22%: a.What is the aftertax cost of debt? b. What is the pretax cost of debt? c. Which is more important in calculating the cost of capital...
*April 17, 2013*

**science**

If 1.38 g of steam at 100.0°C condenses into 38.6 g of water, initially at 27.6°C, in an insulated container, what is the final temperature of the entire water sample? Assume no loss of heat into the surroundings. °C
*April 16, 2013*

**statistic**

A sample of 59 night-school students' ages is obtained in order to estimate the mean age of night-school students. x = 25 years. The population variance is 19. (a) Give a point estimate for μ. (Give your answer correct to one decimal place.)
*April 16, 2013*

**Physics**

he equation of a transverse wave on a string is y = (4.8 mm) sin[(14 m-1)x + (440 s-1)t] The tension in the string is 10 N. (a) What is the wave speed? (b) Find the linear density of this string.
*April 16, 2013*

**Help with statistics**

how u came up with 2.61 and 1.54
*April 16, 2013*

**english**

With in sentence should town also be capitalized? The town of Blair, Nebraska, is home to Dana College.
*April 16, 2013*

**English**

Can someone check these questions, please? Thank you in advance In Shelley's Frankenstein, what are the traits that remind us of a Gothic novel? 2)Discuss the concepts of beauty and youth as portrayed by Lord Henry in chapter 2 of O. Wilde's The Picture of Dorian Gray...
*April 15, 2013*

**Livingston High**

61/3 =
*April 15, 2013*

**Math**

The mean time to complete a certain stat quiz is 25 minutes, with a standard deviation of 5 minutes. Find the probability of a student taking. 1.) less than 15 minutes. 2.) Between 15 and 25 minutes. 3.)more than 25 minutes.
*April 14, 2013*

**English**

3. Talk with your partner and check the Yes box if your partner likes the activity. If your partner doesn't like the activity, check the no box. ("likies") -> likes. other than that it is grammatically correct.
*April 14, 2013*

**Histroy**

Once they arrived in the United States, immigrants experienced a life very different from what they imagined. Which was not something that was most immediately part of their experience? (Points : 1) Labor scams Low skilled work Religious tolerance Assimilation
*April 14, 2013*

**Physics multiple choice**

3. What are the units for Coeffecient of Lift? [kgm^-3] No units [Ns] [N^2] [N] [ms^-1] [kg] 4. What are the units for the ratio Lift to Drag? [Ns] [kgm^-3] No units [ms^-1] [kg] [N^2] [N]
*April 12, 2013*

**Geometry**

A set of three distinct positive integers has mean 4 and median 5. What is the largest number in the set?
*April 11, 2013*

**Geometry**

I saw the the problem already answered but I just don't get what is a and what is b.
*April 11, 2013*

**Geometry**

Two players each flip a fair coin. The probability that they get the same result can be expressed as a b where a and b are coprime positive integers. What is the value of a+b ?
*April 11, 2013*

**English**

Thank you! I left out these sentences on Owen's life. Thank you. 1) Wilfred Owen enlisted as a soldier in 1915. During his first mission in France, he spent some time in hospital to recover from shell shock. 2) There, he met poet Siefried Sassoon who read his poems and ...
*April 10, 2013*

**English**

Can somone check if my sentences on Owen's poem "Dulce and Decorum est" are correct? Thank you very much The title of his 1917 poem Dulce et Decorum Est translates to “It is sweet and right” – a direct quotation from Ode, written by Latin poet ...
*April 10, 2013*

**Statistics**

In his management information systems textbook,Professor David Kroenke raises and interesting point:"If 98% of our market has Internet access,do we have a responsibility to provide non-Internet materials to that other 2%?Suppose that 98% of the customers in your market ...
*April 9, 2013*

**Physics**

Platform area = 0.027[m2]. Wind Speed = 7.1[ms-1]. Air Density = 1[kg m-3]. Drag = 0.39[N]. Lift = 1.45[N]. Coeffecient of Lift = Use three sig. figs. or N/A if no answer. Platform area = 0.045[m2]. Wind Speed = 5.7[ms-1]. Air Density = 1[kg m-3]. Drag = 0.77[N]. Lift = 1.19[...
*April 7, 2013*

**math**

A rectangular garden is 20 m by 25m. It is surrounded by a sidewalk. The outside perimeter of the sidewalk is 114m. What is the width of the sidewalk?
*April 7, 2013*

**English**

I want to learn how to write an appropriate letter to the editor in no more than 200 words. I took the article "stuck in the middle" by Jeevan Vasagar of "The Guardian" as an exercise, you can find it on Google. Unfortunately, I am not allowed to post ...
*April 7, 2013*

**Physics**

A 35kg child is swinging on a swing with length 2.8m to the bottom of the seat. At the highest point of the swing, the rope makes an angle of 42 degrees from vertical. Calculate the speed of the child at the bottom of the swing. Assume no thermal energy is created. Calculate ...
*April 5, 2013*

**Physics**

A bat flying in a cave emits a sound and receives its echo 0.1 s later. Show that it's distance from the cave wall is 19 m.
*April 4, 2013*

**English**

Thank you
*April 4, 2013*

**English**

I don't understand the question please explain
*April 4, 2013*

**English**

Pretend you are a modern social worker, educator, environmentalist, or military advisor to the president. Attack an evil you see the work by writing an ironic proposal and the proposal have to be outrageous
*April 4, 2013*

**statistics**

An educational researcher studying the ages of freshmen at community colleges took a sample of 12 students. The data below represent the ages of the students sampled
*April 3, 2013*

**Statstistics**

Chicken Delight claims that 91% of its orders are delivered within 10 minutes of the time the order is placed. A sample of 90 orders revealed that 75 were delivered within the promised time. At the 0.10 significance level, can we conclude that less than 91% of the orders are ...
*April 3, 2013*

**government**

Thank you.
*April 2, 2013*

**government**

So it is B I get it.
*April 2, 2013*

**government**

Is it A? Ms. Sue
*April 2, 2013*

**government**

I think C
*April 2, 2013*

**government**

what is the implied power expressed by the necessary and proper clause in the constitution a congress's ability to make laws is severely limited by the Constitution b congress is given limited authority to interpret reserved powers c congress must follow a concrete ...
*April 2, 2013*

**math**

Bank A interest per years = (2.46*30000)/100= $738 per year Bank B interest (2.48*30000)/100=744 Bank c interest (2.47*30000)/100=741 So Bank B the most interest at the end of one year.
*April 2, 2013*

**Chemistry**

You have .8 liters of a 0.5M HCl solution. If you use this solution to complete a decomposition reaction of HCl how many moles of hydrogen (H2) would be produced?
*April 2, 2013*

**government**

congress shares power with the president in the field of foreign affairs. what other powers do congress and the president share? a judicial powers b postal powers c territorial powers d war powers
*April 2, 2013*

**government**

which of the following determines who holds the position of speaker of the house? a the president b the house c the senate d the joint houses of congress
*April 2, 2013*

**government**

which of the following determines who holds the position of speaker of the house?
*April 2, 2013*

**English**

Can someone check these sentences I need to prepare for tomorrow? Thank you. 1) Troy has been at the BRIT School since he was 14. Before that he was in a normal secondary school. 2) Unlike in a normal secondary school, students at the BRIT study all the ordinary academic ...
*April 2, 2013*

**Physics**

94860m
*April 2, 2013*

**biology**

) To test linkage between the feather texture and feather color genes you complete a test cross with the F1, and find that the feather texture and feather color genes are linked. Only part of the data from the test cross is given below. Complete the table by giving the four ...
*April 2, 2013*

**Algebra help!!**

help please!! 1. There is an E like symbol that has a 7 at the top. On the bottom k=1 and on the right side (-1)^k K 2. There is an E like symbol that has a 8 at the top. ON the bottom K=3 and on the right side (-1)K/K(k-2)
*April 1, 2013*

**math: Algebra**

Three cylindrical tubes with with a 12 in diameter are strapped together by a plastic band. How long is the band?Suppose that four of the same tubes are strapped together with a snugly fitting plastic band how long is the band?
*April 1, 2013*

**Algebra **

I have two problems that I need some help with. I believe I got to the answer but not quite sure if its right. I need to expand and evaluate each series. 1. There is an E like symbol that has a 7 at the top. On the bottom k=1 and on the right side (-1)^k K 2. There is an E ...
*April 1, 2013*

**Algebra help **

I need some help I posted the first question to this a bit ago but didnt enter it correctly so sorry to those who helped! I also have a 2nd half which I understood till they added the dividing part. I need to find the first five terms of each recursive sequence. 1.C1=64, C2=32...
*April 1, 2013*

**biology**

Consider the pedigree below. Individual 1 is homozygous normal. Individual 2 is both red-green color blind and a hemophiliac. Individual 6 is the as yet unborn son of 4 and 5. What is the probability that their son, 6, will be both color blind and a hemophiliac? Express your ...
*March 31, 2013*

**Chemistry**

What are the concentrations of A– and HA after 24 mL of 0.33 M hydrochloric acid solution is added to 86 mL of a solution that has [A– ]=0.67 M? Do NOT consider any equilibrium reactions in this problem. A–(aq) + HCl(aq) → HA(aq) + Cl–(aq) How do I ...
*March 31, 2013*

**Physics**

A purple beam is hinged to a wall to hold up a blue sign. The beam has a mass of mb = 6.1 kg and the sign has a mass of ms = 16.4 kg. The length of the beam is L = 2.83 m. The sign is attached at the very end of the beam, but the horizontal wire holding up the beam is attached...
*March 31, 2013*

**Biochemistry**

in need of part b like frustration
*March 31, 2013*

**cHEMISTY**

If Ksp for the dissolution of silver carbonate is 8.1x10-12, calculate the concentration of silver ions present in a saturated solution of silver carbonate
*March 30, 2013*

**Math Movers**

Thanks!
*March 29, 2013*

**Math Movers**

I meant C=500+10(M-100)
*March 29, 2013*

**Math Movers**

Wouldn't it be this? C=500+10M-100)
*March 29, 2013*

**Math Movers**

Movers A mover charges $500 for the first 100 miles plus $10 for each additional mile. If C represents the charge and M represents miles. What would the equation look like for this question?
*March 29, 2013*

**Science Grade 8**

structure
*March 28, 2013*

**Chemistry**

Titration of 0.6500g of an acid requires 182.42 mL of 6.020x10^-3 N NaOH to reach the endpoint. What is the mass of an equivalent of this acid?
*March 28, 2013*

**Algebra**

What is the product of all roots to the equation \begin{align} & (x-1)(x-2)(x-3) + (x-2)(x-3)(x-4) \\ + & (x-3)(x-4)(x-5) + (x-4)(x-5)(x-6) \\ + & (x-5)(x-6)(x-7) + (x-6)(x-7)(x-8) =0 ? \end{align}
*March 27, 2013*

**Algebra**

\begin{align} & (x-1)(x-2)(x-3) + (x-2)(x-3)(x-4) \\ + & (x-3)(x-4)(x-5) + (x-4)(x-5)(x-6) \\ + & (x-5)(x-6)(x-7) + (x-6)(x-7)(x-8) =0 ? \end{align}
*March 27, 2013*

**Algebra**

As x ranges over all real values, what is the minimum value of f(x)=|x-123|+|x-456| + |x-789| ?
*March 27, 2013*

**Geometry**

The value of y that minimizes the sum of the two distances from (3,5) to (1,y) and from (1,y) to (4,9) can be written as \frac{a}{b} where a and b are coprime positive integers. Find a + b.
*March 27, 2013*

**math**

Suppose z is a complex number such that z^5 = -\sqrt{3} + i and z = \sqrt[5]{2} ( \cos n^{\circ} + i \sin n^{\circ}) , where 270 < n < 360 . Find the exact value of n .
*March 27, 2013*

**Maths**

The value of y that minimizes the sum of the two distances from (3,5) to (1,y) and from (1,y) to (4,9) can be written as a/b where a and b are coprime positive integers. Find a + b.
*March 27, 2013*

**math**

EDDIE AND LITTLE MISS ARE WRONG! The real answers are 1. C 2. B 3. D 4. A 5. B 6. D 7. D 100% A! Do not trust Eddie or Little Miss!
*March 27, 2013*

**Microbiology**

You need to make 20ml of a 20% glucose solution. The M.W. of glucose is 180.16. How would you accomplish this: Glucose _______g Pure Water _______ml
*March 27, 2013*

**Microbiology**

You need 3.5L of 50mM NaCl from your 20X stock. How would you accomplish this: 20X stock __________ml Pure Water ___________ml From whatever number I plugged in trying to solve it, I got: 175ml of 20X stock and 3,430ml of Pure Water. Have no idea if those are right. Any help ...
*March 27, 2013*

**Physics**

784 is not the answer
*March 27, 2013*

**Physics**

An 80 kg man is riding in an elevator from the first floor to the 34th floor. The elevator and man are moving at a constant speed. What is the net force on the man in Newtons (g=9.8)
*March 27, 2013*

**calculus**

The volume of the 3-dimensional structure formed by rotating the circle x^2 +(y−5)^2 =1 around the x-axis can be expressed as V=a*pi^2 . What is the value of a
*March 27, 2013*

**calculus**

The volume of the 3-dimensional structure formed by rotating the circle x^2 +(y−5)^2 =1 around the x-axis can be expressed as V=að^2 . What is the value of a
*March 27, 2013*

**maths**

Find the sum of all positive integers b such that b^2 =a^3 +1 , where a is a prime number
*March 27, 2013*

**Algebra**

Consider all 2 digit numbers N such that the last 2 digits of N^2 are N itself. What is the sum of all these 2 digit numbers?
*March 26, 2013*

**Algebra**

Find the smallest positive integer N \neq 23 such that the fraction \frac {N-23} { 7N+6 } is not in simplest terms.
*March 26, 2013*

**Calc.**

A dog kennel owner needs to build a dog run (rectangular area) adjacent to a kennel cage (so that it is in the shape of a rectangle, but only three sides need to be built- one long side is already there). The short side walls of the run are to be cinder block (costs $0.50 per ...
*March 26, 2013*

**Math**

For this problem, all you have to do is find the volume of the chest. The formula for the volume of a rectangle is V=l*w*h. In this case V=4*2*3 which is 24 ft cubed. This means that 24 1x1x1 ft cubes would fit inside the chest.
*March 26, 2013*

**physics**

For this question you're going to need a kinematic equation. Because you're solving for time, I would use d=Voy*t+0.5*a*t^2 The acceleration is 9.8 m/s^2 (making "down" positive) due to gravity. There is no initial velocity (V) in the y direction. You do not ...
*March 26, 2013*

**business**

"...incorporation is no longer the special privilege it once was". Discuss this statement. Does it have any impact on businesses (those not incorporated).
*March 25, 2013*

**business**

what is the utiliterian theory
*March 25, 2013*

**physics**

Light with a frequency of 4.32 × 1015 Hz strikes a metal surface and ejects electrons that have a maximum kinetic energy of 5.8 eV. What is the work function (in eV) of the metal?
*March 25, 2013*

**Math- Calculus**

find the dimensions of a rectangle of maximum size that will fit into a half circle of radius 30 cm.
*March 24, 2013*

**algebra**

Will someone please help me slove this question. Completely factor the polonomial. 8x^3+16x^2+8x+16
*March 24, 2013*

** Math**

A company offers the following charges: $54 per thousand for orders of 62000 or less with the charge per thousand decreased by 38 cents for each thousand above 62000. Find the order which will make the company's revenue a maximum.
*March 24, 2013*

**math**

a driver comes to pick up members of your family (20 members) for a family reunion. the van holds 7 people not including the driver. assuming none of the babies will be riding (2 babies in the group of 20) how many different ways can 7 people be chosen to ride in the van?
*March 24, 2013*

**Math- Calculus**

A company offers the following charges: $54 per thousand for orders of 62000 or less with the charge per thousand decreased by 38 cents for each thousand above 62000. Find the order which will make the company's revenue a maximum.
*March 24, 2013*

**math**

how many different ways can 7 out of 18 people be picked to fit into a van
*March 24, 2013*

**math**

how many different ways can 7 out of 18 people be picked to fit into a van
*March 24, 2013*

**Math- Calculus**

A company needs to produce a cylindrical can to hold water. It must have a volume of 500ml. The side of the can will cost 40$/m^2 to produce and the top and bottom of the can will cost 50$/m^2 to produce. Find the most economical dimensions.
*March 24, 2013*

**Algebra (word problems)**

Studying help! Flights of leaping animals typically have parabolic paths. The figure illustrates a frog jump superimposed on a coordinate plane. The length of the leap is 9 feet, and the maximum height off the ground is 3a feet. Find a standard equation for the path of the ...
*March 22, 2013*