Thursday
September 18, 2014

Posts by Sam


Total # Posts: 3,988

Stats
Consumer Reports rated airlines and found that 80% of flights involved in the study arrived on time (that is, within 15 minutes of scheduled arrival time). Assuming that the on-time rate is representive of the entire commercial airline industry, consider a random sample of 200...
December 13, 2011

Math Grade 10
a
December 12, 2011

Chemistry
How many oxygen atoms are represented in the formula Fe2(SO4)3?
December 6, 2011

Algebra 1
How do you do slope intercept form y=mx+b
December 6, 2011

math word problem
Suzzanne wants to build a fence around her square garden . The garden measures 7 feet on each side . How much fencing material does she need?
December 5, 2011

Chemistry
How many grams of chlorine are needed to make 5.00 X 10^6 g of a solution that is 1.50 ppm chlorine by mass?
December 5, 2011

English Essay Topic
Thank you Writeacher and Ms. Sue!! <3
December 3, 2011

English Essay Topic
I am stuck! I don't know what topic to write about for my research paper! I want to write about something modern and recent but I don't know what! I have been looking through sites but nothing seems to stick out! Can you give me any suggestions?
December 3, 2011

acc
Which of the following is a true statement about manual and electronic accounting systems?
December 3, 2011

Chemistry
A decomposition reaction has a rate constant of 0.0019 yr -1. ( a) What is the half-life of the reaction? ______ yr (b) How long does it take for [reactant] to reach 12.5% of its original value? ______ yr
December 2, 2011

Physics
1.Two balls, each with a mass of 0.871 kg, exert a gravitational force of 8.23 × 10−11 N on each other. How far apart are the balls? The value of the universal gravitational constant is 6.673 × 10−11 Nm2/kg2. Answer in units of m I got .785 which is ...
December 1, 2011

Physics
The planet Krypton has a mass of 7.1 × 1023 kg and radius of 3.3 × 106 m. What is the acceleration of an object in free fall near the surface of Krypton? The gravita- tional constant is 6.6726 × 10−11 N · m2/kg2. Answer in units of m/s2
December 1, 2011

Physics
A satellite moves in a circular orbit around the Earth at a speed of 6.3 km/s. Determine the satellite’s altitude above the surface of the Earth. Assume the Earth is a homogeneous sphere of radius 6370 km and mass 5.98 × 1024 kg. The value of the universal ...
December 1, 2011

calculus
A spring exerts a force of 4x lbs when it is compressed a distance of x feet. How much work is required to compress the spring a distance of one inch?
December 1, 2011

research & Evaluation II
The F test is used to compare the variances of two samples
November 30, 2011

Great Expectations by Charles Dickens
I'm looking for a word that means "teaching" because I think Great Expectations is all about learning and adapting to all different kinds of experiences and changes; it also has a very interesting and entertaining story plot. I'm trying to create a collage, ...
November 29, 2011

Great Expectations by Charles Dickens
If you had to describe the classic novel, Great Expections, by Charles Dickens, in one word, what would you describe it as?
November 29, 2011

math
Emily surmises that the probability tht she will pass math or chemistry is .95, the probability of her passing math is .7, and the probability of passing both is .55. Find her estimate of the probability of passing chemistry?
November 22, 2011

Pratical English
1. Which one of the following sentences contains an incorrect usage of the singular possessive? A. Mary was dominant among Jesus' disciples. B. The alpha male is often the pack's leader. C. The north forty has always been my family's land. D. Icarus's fate was ...
November 19, 2011

(English) War of the Worlds Book Question
Martian cylinder and the Martian tripod are initially referred to by the narrator as a "Thing." Why do you think that the word "Thing" is capitalized in these references?
November 19, 2011

Chemistry
What is the strongest intermolecular force in a sample of butanoic acid, and why? H H H O . . . .. H .C .C. C .C .O.H . . . H H H Is this structure right?
November 16, 2011

Algebra
-(5x+5)-4+8x
November 16, 2011

Algebra
(x+2)-(x-2)-12x =??
November 16, 2011

algebra
-9-(12-3x)
November 16, 2011

English/Writing
sorry, I only know the second two. they are evolving they are succeeding
November 16, 2011

Calculus
this homework is due in one hour and i have no idea how to answer these questions. 1. A car is traveling at 50 mi/h when the brakes are fully applied, producing a constant deceleration of 20 ft/s^2. What is the distance covered before the car comes to a stop? 2. A stone is ...
November 16, 2011

physics
What force must be applied to push a carton weighing 220 N up a 20° incline, if the coefficient of kinetic friction is 0.39? Assume the force is applied parallel to the incline and the velocity is constant
November 14, 2011

accounting
How do you journalize theses transactions? 8) Purchased $15000 food to sell; paid 1/3 in cash and the balance on account 10) Paid $30000 for a one-year insurance policy effective October 1, 2011 12) Purchased supplies for $2400 on account.
November 12, 2011

science
Earthquakes occur because of _____. plate tectonics cracks in the crust landslides volcanoes
November 9, 2011

Algebra
Use the FOIL method to find the product (3x^2-5)(x^5-9)
November 8, 2011

geometry
One right triangle has legs 18cm and 14cm. Another right trangle has legs 14cm and 24 cm. What is the ratio of the areas of these two triangles?
November 7, 2011

Physics
530 m
November 7, 2011

english
conversation between two friends on school of 2050 how it would be compared to present one
November 7, 2011

statistics
hey
November 6, 2011

english
Thank you for you help. Sam
November 5, 2011

english
Please can you give me some feedback and any advice on how to improve my argument essay on the topic "Zoos are important places" Also if you have any further ideas I could include. Many thanks for you help. By 2050, 30% of the world’s wildlife will have ...
November 5, 2011

Chem
Arrange these elements P, Mg, N, Br, K in increasing metallic character
November 4, 2011

statistics
A rocket fuel is to contain percent X of a particular chemical. The specification limits for X are 30 to 35%. The manufacturer will make a profit Q(x) on fuel per gallon as follows. Q(x)= 10 cents if 30<=x<=35 5 cents if 35<x<40 or 25<x<30 -10 cents otherwise...
November 4, 2011

research & Evaluation I
I have a car that has gone 50,000 miles, on average without a breakdown. What is the chance, in the next 5000 miles I have a breakdown?
November 2, 2011

research & Evaluation
The housing market in my area has seen a 12% trend downward in the average price. Further, the time to closing appears to have taken more time as compared to 3 years ago. Here are the values for the average time to close for the houses in the area. Mean = 22.3 weeks Std ...
November 2, 2011

research & Evaluation
I have an airplane that has an ignition system that works like this. There are 2 energy producing devices, called magnetos that "fire" the spark plugs, 2 per cylinder. There is a 1 in a 1000 chance that one will fail. What is the chance that Magneto A OR Magneto B ...
November 2, 2011

statistics
I have an airplane that has an ignition system that works like this. There are 2 energy producing devices, called magnetos that "fire" the spark plugs, 2 per cylinder. There is a 1 in a 1000 chance that one will fail. What is the chance that Magneto A OR Magneto B ...
November 2, 2011

english
what is SCS,SCV?
November 2, 2011

geometry
anthony is building a picnic table for his patio. he cut one of the legs at an angle of 40 degrees. at what angle should he cut the other end to ensure that the top of the table is parallel to the ground?
November 1, 2011

math
how many gallons would be left after 10 seconds?
November 1, 2011

Calculus optimization problem
A rectangular dog run is to contain 864 ft ^2. a. If the dog's owner must pay for fencing, what should be the dimensions of the run to minimize cost? b. Suppose a neighbor has agreed to let the owner use an already constructed fence for one side of the run. What should the...
October 30, 2011

english
how to write these questions into indirect questions? please 1-What other changes have there been in the last 100 years? 2-Do you think the quality of life in general is better now than it used to be?
October 30, 2011

Biology
Which of the following is not a benefit of genetic counseling: a.It helps identify parents at risk for having children with genetic defects. b.It assists parents in deciding whether or not to have children. c.It is based exclusively on family pedigrees. d.It helps identify ...
October 28, 2011

algebra
The width of a rectangle is 4 meters more then 1/3 its lenght. the perimeter is 64. Find the lenght and width
October 27, 2011

MATH
here you go - just visit - bit.ly/pZYD6P
October 27, 2011

math
bit.ly/o3fZeG
October 27, 2011

Chemistry
What are the half reactions for NH4ClO4 + Al = Al2O3 + AlCl3 + NO? I can balance it once i have the half reactions
October 23, 2011

Chemistry
What are the half reactions for NH4ClO4 + Al = Al2O3 + AlCl3 + NO? I can balance it once i have the half reactions
October 23, 2011

Chemistry
Bob is wrong, by half reactions the hydrogen will balance out with the addition of H2O on the right hand side... i'm doing this problem myself and having trouble separating into half reactions in the first place
October 23, 2011

History
By 1826 was the country more Hamiltonian or more Jeffersonian?
October 23, 2011

physics
A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, and rock is 94.0 kg. The mass of the rock is 0.350 kg. Initially the wagon is rolling forward at a speed of 0.520 m/s. ...
October 22, 2011

trig
as a hot air balloon rises vertically, its angle of elevation from point P on level ground 110 kilometers from th epoint Q directly underneath the balloon changes from 15 degree 5' to 31 degree 45'. Approximately how far does the balloon rise during this period? a. 38....
October 22, 2011

CHEMISTY HELP!!!
Thank you so much!
October 21, 2011

CHEMISTY HELP!!!
A professor found that there are 109 drops of glacial acetic acid in 2.00 mL. Calculate the number of drops of glacial acetic acid, HC2H3O2 required to make 155 ml of 0.25 M acetic acid solution Can anyone walk me through the steps and provide an answer. Ive tried everything ...
October 21, 2011

Math
A college basket ball player makes 80% of her free throws. Suppose this probability is the same for each free throw she attempts. The probability that she makes all of her first four free throws and then misses her fifth attempt this season is
October 21, 2011

Math
Draw Base Ten Blocks to show the number five hundred fifteen.
October 19, 2011

Math
Do the coursework yourself you lazy bum.
October 17, 2011

accounting
What are the ethical issues? Who are the stakeholders? (at least 3) How is each stakeholder you listed in #2 affected? (Be specific). What would you do? Explain
October 16, 2011

accounting
Bill has just started working for a major grocery store as a check-out clerk. Mason is training him in the duties of the new position. At the end of the first day, Bill and Mason are counting the cash in their drawer and reconciling cash receipts to the cash register total. ...
October 16, 2011

algebra 1b
it was wrong the first one
October 13, 2011

algebra 1b
(x7 + x4 + x)(x3 - 1) can u help me with this one 2
October 13, 2011

algebra 1b
thanks :)
October 13, 2011

algebra 1b
Use the table below to find the products of the two polynomials. Enter your answer in descending order in the box below. Enter exponents using the caret ( ^ ). For example, you would enter as 4x^2. Do not enter spaces in your answer. (x3 + 2x2 - 2)(x3 - 3x + 3)how do you do this?
October 13, 2011

Linguistic - Japanese
What are the sentence structure rules for the Japanese language? I know you have the sentence -> (noun phrase) (verb phrase)
October 13, 2011

Chemistry
Consider a mixture of air and gasoline vapor in a cylinder with a piston. The original volume is 50. cm3. If the combustion of this mixture releases 990. J of energy, to what volume will the gases expand against a constant pressure of 645 torr if all the energy of combustion ...
October 13, 2011

Chemistry
As a system increases in volume, it absorbs 52.5 J of energy in the form of heat from the surroundings. The piston is working against a pressure of 0.500 atm. The final volume of the system is 58.0 L. What was the initial volume of the system if the internal energy of the ...
October 13, 2011

Math
9,000
October 12, 2011

algebra
need help dont exactly understand the question: Factor and check by Multiplying 6x + 10y -2
October 12, 2011

Chemistry
So is the first amino acid the N-Terminus and the last amino acid the C-Terminus?
October 11, 2011

Chemistry
Can you draw a dipeptide and show all the functional groups, atoms, and bonds, any full charges on atoms, and the "R" group. Also, show N and C terminus? It would really help if you can show me pictorially.. thanks
October 11, 2011

chem
a volume of 10.0 ml of a 0.00450 M solution of Cl- ions are reacted with 0.500 M solution of AgNO3.What is the maximum mass of AgCl that precipitates?
October 10, 2011

environmental science
I need some help coming up with ideas for this topic: What are some pros to allowing private logging companies to thin federally owned forests? Cons?
October 10, 2011

physics
A ferry is crossing a river. If the ferry is headed due North with speed of 2.5m/s relative to the water and the river's velocity is 3 m/s to the east, what will the boat's velocity be relative to Earth?
October 10, 2011

chemistry
calculate the weight of copper in the Cu(NH3)4SO4 H20 you made. Mass of Cu(NH3)4SO4 H20 = 0.1140g
October 7, 2011

chemistry
Antimony forms 2 chlorides having widely different properties. One of the chlorides is a solid that melts at 73*C and contains 46.5% chlorine by mass. The other is a liquid that boils at 140*C and contains 59.3% chlorine by mass. Show how these results illustrate the low of ...
October 7, 2011

chemistry
Finding molarity and molality(best answer)? An aqueous solution is prepared by diluting 3.30 mL acetone,(d= 0.789g/mL) with water to a final volume of 75.0 mL. The density of the solution is 0.993 g/mL. What is the molarity, molality and mole fraction of acetone in this solution?
October 7, 2011

Physics
Two blocks (one of which is on a ramp) are attached via a string looped over a pulley. The block on the incline has a mass of 5.0 kg; the block hanging downward (suspended by the pulley) has a mass of 7.0 kg. Assume the usual things (non-stretchy massless string, frictionless ...
October 6, 2011

Physics
Two blocks (one of which is on a ramp) are attached via a string looped over a pulley. The block on the incline has a mass of 5.0 kg; the block hanging downward (suspended by the pulley) has a mass of 7.0 kg. Assume the usual things (non-stretchy massless string, frictionless ...
October 6, 2011

physics
Two blocks (one of which is on a ramp) are attached via a string looped over a pulley. The block on the incline has a mass of 5.0 kg; the block hanging downward (suspended by the pulley) has a mass of 7.0 kg. Assume the usual things (non-stretchy massless string, frictionless ...
October 6, 2011

physics
46
October 6, 2011

physics
Two blocks (one of which is on a ramp) are attached via a string looped over a pulley. The block on the incline has a mass of 5.0 kg; the block hanging downward (suspended by the pulley) has a mass of 7.0 kg. Assume the usual things (non-stretchy massless string, frictionless ...
October 6, 2011

Physics
A skateboarder shoots off a ramp with a velocity of 6.7 m/s, directed at an angle of 53° above the horizontal. The end of the ramp is 1.0 m above the ground. Let the x axis be parallel to the ground, the +y direction be vertically upward, and take as the origin the point ...
October 5, 2011

website
i need a wedsite to help me dengin a moldol of a simple machine for a proget any ideas
October 5, 2011

chemistry
your balanced equation is it CaCO3---------->CaO+CO2
October 5, 2011

physics
An object moving on the x axis with a constant acceleration increases its x coordinate by 161 m in a time of 12.5 s and has a velocity of 20 m/s at the end of this time. Determine the acceleration of the object during this motion. Answer in units of m/s2.
October 3, 2011

physics
A car starts from rest and accelerates for 6.5 s with an acceleration of 3.6 m/s2. How far does it travel? Answer in units of m
October 3, 2011

statistics
Consider a hypothetical population of dogs in which there are four possible weights, all of which are equally likely: 42, 48, 52, or 58 pounds. If a sample of size n=2 is drawn from this population, what is the sampling distribution of the total weight of the two dogs selected...
October 2, 2011

trig
Find all solutions to the equation 2cos(2x) = x + 1, correct to 4 decimal places.
October 2, 2011

Physics
On a hot summer day in the state of Washington while kayaking, I saw several swimmers jump from a railroad bridge into the Snohomish River below. The swimmers stepped off the bridge, and I estimated that they hit the water 1.5s later. a) How high was the bridge? b) How fast ...
October 2, 2011

Home Ec.
What is Fam & Cons ?
October 1, 2011

finance
Asset-liability management is the term where the maturity of an asset is similar to the time that the liability expires. Which of the following is not good asset-liability matching? -Brand new quality car financed by a 5-year loan. -Retirement fund for a 35-year old containing...
October 1, 2011

math
You are driving home from college steadily at 95km/hour for 130km. It begins to rain and you slow to 65km/hour. You arrive home after driving 3 hours and 20 minutes. How far is your hometown from college?
September 29, 2011

Math
A regular hexagon has six sides of equal length. If each side of a hexagon is 25mm, what is the perimeter?
September 29, 2011

Geometry
Given: angle ABD is a right angle , angle CBE is a right angle. Prove: angle ABC is congruent angle DBE
September 29, 2011

physics
It takes you 7.6 min to walk with an average velocity of 2.5 m/s to the north from the bus stop to the museum entrance. How far did you walk? Answer in units of m What is your direction? (multiple choice) 1. West 2. North 3. South 4. East
September 29, 2011

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