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October 25, 2014

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Math
5. There was a drawing for a prize at the Columbus Day celebration downtown. The prize was a scale model of the Santa Maria carved from a single piece of wood by a local artist. It was a beautiful ship and Jose really wanted it. Each $2.25 ticket bought one chance in the ...
Monday, March 31, 2014 at 5:35pm

Math
Each ticket bought is $2.25. Each ticket bought Gives one chance in the drawing. Jose Purchased 10 tickets. If there were 510 tickets Purchased in all, what is the probability that One of Jose's ticket's will be drawn first? 10/510 or1: 52 chance
Monday, March 31, 2014 at 4:19pm

Math
Each ticket bought is $2.25. Each ticket bought Gives one chance in the drawing. Jose Purchased 10 tickets. If there were 510 tickets Purchased in all, what is the probability that One of Jose's ticket's will be drawn first? 10/510 or1: 52 chance
Monday, March 31, 2014 at 4:19pm

physics
Light shines through a single slit whose width is 5.7 × 10-4 m. A diffraction pattern is formed on a flat screen located 4.0 m away. The distance between the middle of the central bright fringe and the first dark fringe is 3.9 mm. What is the wavelength of the light?
Monday, March 31, 2014 at 2:44pm

science
1.   Use the diagram to answer question 1. description: particles have enough energy to break free from each other and can move around freely; particles spread out in different directions  sketch: What kind of substance is described?  (1 point) solid ...
Monday, March 31, 2014 at 2:24pm

Math
Find the probability of drawing the face card that is a spade on the first-draw replacing it and drawing a king card on the second draw
Monday, March 31, 2014 at 11:56am

physic
Physicists claim that charge never flows through an ideal capacitor. Yet when an uncharged capacitor is first placed in series with a resistor and a battery, then current flows through the battery and the resistor. Explain how this is possible.
Sunday, March 30, 2014 at 8:47pm

more proofreading.
this is another body paragraph to my research paper. can I get this one proofread as well thanks! Both Japan and the United States protect freedoms of speech and press by similar provisions in each nation’s constitution. For example, the First Amendment of the U.S. ...
Sunday, March 30, 2014 at 6:39pm

math
A salmon has to swim 25 miles upstream. It seems 7 miles each day and drifts 5 miles at night. How many days does it take for the salmon to first reach the 25 mile mark?)
Sunday, March 30, 2014 at 5:15pm

physics
a race car traveling northward on a straight, level track at a constant speed travels 0.750 km in 20.0 s. the return trip over the same track is made in 25.0 s. a) what is the average velocity if the car in m/s for the first leg of the run? b) what is the average velocity for ...
Sunday, March 30, 2014 at 3:13pm

Math
your class is conducting an experiment to study geometric sequences. The class forms a line. the first person takes a whole pizza,divides it in half, keeps half, and hands it to the next person. The next people in line do the same with there peices. Which portion does the ...
Sunday, March 30, 2014 at 2:42pm

physics
The drawing shows three identical springs hanging from the ceiling. Nothing is attached to the first spring, whereas a W = 4.20-N block hangs from the second spring. A block of unknown weight hangs from the third spring. From the drawing, determine the spring constant (in N/m...
Saturday, March 29, 2014 at 3:41pm

Physics
The ship in the figure below travels along a straight line parallel to the shore and a distance d = 580 m from it. The ship's radio receives simultaneous signals of the same frequency from antennas A and B, separated by a distance L = 700 m apart. The signals interfere ...
Saturday, March 29, 2014 at 1:28am

Finance
10. A new factory at Arcata requires an initial outlay of $3.5 million to be paid immediately. The factory will last for eight additional years, after which it can be sold for a salvage value of $2,000,000. Sales will be $800,000 during the first year of operation and will ...
Friday, March 28, 2014 at 10:38pm

Finance
9. H Corporation is considering a training program that cost $600,000. Anticipated benefits are $60,000 in the first year, $75,000 in the second year, $85,000 in the third year, and $95,000 in the fourth year. Benefits will decline 8 percent a year after the fourth year, and ...
Friday, March 28, 2014 at 10:37pm

probability
A fair coin is flipped independently until the first Heads is observed. Let K be the number of Tails observed before the first Heads (note that K is a random variable). For k=0,1,2,…,K, let Xk be a continuous random variable that is uniform over the interval [0,3]. The Xk...
Friday, March 28, 2014 at 12:36pm

Criminal law
1. The primary purpose of psychological profiling is to provide: A.the identity of an offender involved in a violent crime such as murder or sex crime. B. absolute information about an offender’s emotional and personality character traits and to immediately direct ...
Friday, March 28, 2014 at 9:55am

Mathematics
Give the first three terms of the sequence of 1.Tn+1=Tn+n
Thursday, March 27, 2014 at 11:20pm

Math
I was wondering if you can help me with math real quickly. I just cant figure this out. For the first question I have to find the surface area for the given cylinder. I have to use 3.14 and round to the nearest whole number. The radius is 6ft and the height is 20 ft. A. 180 ...
Thursday, March 27, 2014 at 10:37pm

math
Mrs. Jones and Mr. Graham had the same amount of money at first. After Mrs. Jones bought a computer that cost $2,055, she had 1/4 as much money as Mr. Graham. How much money did Mr. Graham have?
Thursday, March 27, 2014 at 9:54pm

Persuasive Writing help
I'm writing a persuasive request but English is not my native language. I've done many drafting and revising, but still not sure. so I would be grateful if you could show me what I did wrong and the correct way to revise it. Thanks "Dear xxx, I would like to ...
Thursday, March 27, 2014 at 9:29pm

Calculus
A weight oscillates in a vertical motion according to the position function y(t)=-5 cos(t). Assuming t≥0, when will the acceleration if the weight be zero for the first time?
Thursday, March 27, 2014 at 2:51pm

science
an you please solve the questions for me 1. 3 moles of pesticide of molecular mass 200 g/mole is applied to a closed system consisting of 20 m3 of water, 10 m3 of air, 1 m3 of sediment, and 0.001 m3 of fish. Determine the concentration and amount in both grams and mole units ...
Thursday, March 27, 2014 at 2:24pm

physics
A 6.26-g bullet is moving horizontally with a velocity of +344 m/s, where the sign + indicates that it is moving to the right (see part a of the drawing). The bullet is approaching two blocks resting on a horizontal frictionless surface. Air resistance is negligible. The ...
Thursday, March 27, 2014 at 1:35pm

physics
A weight oscillates in a vertical motion according to the position function y(t)=-5cos t. Assuming t>=0 (greater than or equal to), when will the acceleration of the weight be zero for the first time?
Thursday, March 27, 2014 at 12:13pm

finance
Polycorp has a current dividend of $5.00 due tomorrow and is expected to pay a dividend $5.50 at the end of the first year. Its dividend is expected to grow at 8% pa for the following year. Dividends are then expected to grow at 4% pa for another two years. Then they are ...
Thursday, March 27, 2014 at 10:32am

Chemistry
How would you exactly start the first problem? My thermodynamic skills is a bit rusty. I am assuming I have to use ΔH°f under the given reaction..? But then..we barely covered ΔG° in class. Am I to use this equation, ΔG° = ΔH° - T ΔS&...
Thursday, March 27, 2014 at 1:31am

English
After watching a documentary about the environment on TV, I decided to start my own project,"Project Green Kid." Today was my first day as a Green Kid...... ---------------------------------- Do we have to use "a Green Kid"? What about "a green kid&...
Thursday, March 27, 2014 at 1:05am

FINANCE
A perpetuity with the first annual cash flow paid at the beginning of year 4 is equivalent to receiving $103,000 in 15 years’ time. Assume that the perpetuity and the lump sum are of equivalent risk and that j12 = 14.32% pa is the appropriate interest rate. How much is ...
Thursday, March 27, 2014 at 12:49am

FINANCE
Polycorp has a current dividend of $5.00 due tomorrow and is expected to pay a dividend $5.50 at the end of the first year. Its dividend is expected to grow at 8% pa for the following year. Dividends are then expected to grow at 4% pa for another two years. Then they are ...
Thursday, March 27, 2014 at 12:47am

pre calculus
A taxi company charges $2.00 for the first mile (or part of a mile) and 20 cents for each succeeding tenth of a mile (or part). Express the cost C (in dollars) of a ride as a piecewise-defined function of the distance x traveled (in miles) for 0 < x < 2
Thursday, March 27, 2014 at 12:07am

physics
Some say that the hot air balloons with which the Montgolfier brothers performed their first flight had a volume of 1700 cubic metres and could lift 780 kilograms (that includes the balloon, basket and payload). Assume that the balloon took off on a day when the sea level ...
Thursday, March 27, 2014 at 12:00am

algebra
Mary has a total of $5000 invested in two accounts. One account pays 5% and the other 8%. Her interest in the first year was $331. Write and solve a system of equations to find out how much she has invested in both accounts
Wednesday, March 26, 2014 at 10:39pm

Socials
What year was Canada's first railway : the Champlain and Saint Lawrence railroad built in?
Wednesday, March 26, 2014 at 10:09pm

physics
A car moving with an initial speed v collides with a second stationary car that is 50.7 percent as massive. After the collision the first car moves in the same direction as before with a speed that is 33.2 percent of the original speed. Calculate the final speed of the second ...
Wednesday, March 26, 2014 at 7:48pm

Math
If Mike has 8 dimes and 6 pennies in his pocket. If he randomly selected one coin and then a second coin without replacing the first, what is the probability that both coins were dimes?
Wednesday, March 26, 2014 at 7:41pm

LA PLS HELP!!!!! (check my work)
1. What causes Brer Lion to be tied to a tree? (1 point) >>>his fear<<< his strength his obedience to Brer Rabbit 2. Which of the following is a reasonable prediction about what will happen after this story is over? (1 point) Brer Lion and Brer Rabbit will ...
Wednesday, March 26, 2014 at 7:04pm

*****Help Statistic
Imagine taking a 10-question true or false exam. You randomly guess at each question. Don't do any calculations, just tell me your first impressions a). Is this a binomial setting? b) How many question do you think you would get correct? c). How surprised would you be if ...
Wednesday, March 26, 2014 at 4:11pm

Maths
4x+1,2x+4 and x+3 are first three terms of arithmetic sequence determine the value of x
Wednesday, March 26, 2014 at 10:47am

Math
Homing pigeons avoid flying over large bodies of water, preferring to fly around them instead. Assume that a pigeon released from a boat 1 mile from the shore of a lake flies first to point P on the shore and then along the straight edge of the lake to reach its home at L. If ...
Wednesday, March 26, 2014 at 12:07am

chemistry
The rate constant of a first-order reaction is 4.25 x 10^-4 s^-1 at 350 Celsius. If the activation energy is 103 kJ/mol, calculate the temperature at which its rate constant is 8.75 x 10^-4 s^-1.
Tuesday, March 25, 2014 at 11:21pm

Science asap thankies :)
What would a permanently magnetic substance be called? I cant remember what my teacher called it, it was a short first word then magnet.. sorry and thanks!
Tuesday, March 25, 2014 at 10:39pm

Chemistry
The degradation of CF3CH2F (an HFC) by OH radicals in the troposphere is first order in each reactant and has a rate constant of k=1.6×108M−1s−1 at 4∘C. If the tropospheric concentrations of OH and CF3CH2F are 8.1×105 and 6.3×108 molecules ...
Tuesday, March 25, 2014 at 10:03pm

How-To Essay Evaluation (Writeacher)
What do you think? "In order to shoot a bow accurately, the first step to take is to determine your dominant eye (the eye from which a person prefers to receive visual input). While this action might have been what you least expected, by determining your dominant eye, you...
Tuesday, March 25, 2014 at 4:20pm

Physics
A box of mass 50.0 kg is connected to a second box with a mass of 54.0 kg. Both are sitting on a horizontal surface and the coefficient of kinetic friction between the surface and each box is 0.51. If the second box is pulled away from the first box with a force of 605.8 N, ...
Monday, March 24, 2014 at 8:51pm

Physics
A railroad car with a mass of 12000 kg collides and couples with a second car of mass 18000 kg that is initially at rest. The first car is moving with a speed of 9 m/s before collision. If external forces can be ignored, what is the final speed of the two railroad cars after ...
Monday, March 24, 2014 at 8:06pm

math
Mr. Gonzalez's sixth-grade class is putting on a play. He reserved the first 6 rows of the auditorium for family members and friends of the 24 students in his class. If each row contains 17 seats and each student can invite the same number of guests, how many guests can ...
Monday, March 24, 2014 at 6:48pm

Social Studies :)
2. The only Native Americans who successfully stayed on their land were the (1 point) Seminole. *** Sauk. Cherokee. Fox. 3. What act did the United States government pass in order to be able to move Native Americans off their land into Indian Territory? (1 point) Native ...
Monday, March 24, 2014 at 4:36pm

math
Rosy has been jogging for 3 weeks. In the first week She jogged 3 days each for 4/6 of an hour. During week 2 she jogged for 3/4 of an hour on 2 days. In week 3 she jogged 4 days each for 3/5 of an hour . WRITE one expression that would show the total time she spent jogging in...
Monday, March 24, 2014 at 4:12pm

math
The 6th grade classes have started a contest to collect cans for recycling. The first class to reach 500 cans will win. The chart below shows the two classes in the lead. How many cans does each class have left to meet their goal? show the work . find how much they collected. ...
Monday, March 24, 2014 at 3:17pm

MATH
there are 400 students at smith Elementary school 1/4 of the students are in fourth and fifth grade, 1/10 of the students are in grade 3, 2/8 are in second grade and 2/5 are in first grade . How many kids are in each grade? (4th and 5th have an equal amount)
Monday, March 24, 2014 at 3:14pm

math
The 6th grade classes have started a contest to collect cans for recycling. The first class to reach 500 cans will win. The chart below shows the two classes in the lead. How many cans does each class have left to meet their goal? show the work .
Monday, March 24, 2014 at 2:21pm

Physics
Find the total change in the internal energy of a gas that is subjected to the following two-step process. In the first step the gas is made to go through isochoric heating until it gains 5363 J and its pressure is 2.92 105 Pa. In the second step it is subjected to isobaric ...
Monday, March 24, 2014 at 12:42pm

physics
A car moving with an initial speed v collides with a second stationary car that is 46.0 percent as massive. After the collision the first car moves in the same direction as before with a speed that is 37.7 percent of the original speed. Calculate the final speed of the second...
Monday, March 24, 2014 at 9:45am

computer science
a) What is the largest positive number that can be represented in 12 bits using one’s complement? Represent the number in bits and decimal as well. Assume the first bit is the sign bit. (2 marks)
Sunday, March 23, 2014 at 11:47pm

physics
A bicyclist wants to make it from one building to the next. The first building he is standing on is 20 m tall. The building he wants to reach is 12 m tall. He is moving at 4 m/s and the gap between both buildings is 5 m. Will he make it? Please just show me how to break down ...
Sunday, March 23, 2014 at 10:35pm

physics
train car are coupled together by being bumped into one another. suppose two loaded train cars are moving toward one another, the first having a mass of 150000 kg and velocity of 0.30 m/sand the second havin a mass of 110000 kg and a velocity of (-0.12 m/s). what is their ...
Sunday, March 23, 2014 at 9:05pm

physics
Assuming the Earth's magnetic field averages about 0.50×10−4 T near Earth's surface, estimate the total energy stored in this field in the first 15km above Earth's surface. The radius of Earth is 6380 km.
Sunday, March 23, 2014 at 8:15pm

physics
52.(52G) A 110-kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 350 N. For the first 15 m the floor is frictionless, and for the next 15 m the coefficient of friction is 0.30. What is the final speed of the crate?
Sunday, March 23, 2014 at 7:39pm

chemistry
1. When performing this experiment, a student mistakenly used impure KHP to standardize the NaOH solution. If the impurity is neither acidic nor basic, will the percent by mass of acetic acid in the vinegar solution determined by the student be too high or too low? Justify ...
Sunday, March 23, 2014 at 3:05pm

Chemistry - check answers
1) Which element has the largest first ionization energy? A) Rb, B) Fr, C) K, D) Na, E) Mg Answer: E 2) Which has the highest electronegativity? A) Na, B) Cs, C) Si, D) Te, E) Cl Answer: E 3) In which of the following are the bonds arranged in order of increasing polarity? A) ...
Saturday, March 22, 2014 at 8:22pm

physics
Three identical uniform meter sticks are placed on the floor. The first stick lies along the y axis from y = 0.320 m to y = 1.32 m. The second stick lies along the x axis from x = 0.330 m to x = 1.33 m. The third stick is positioned so that one end is on the x axis at x = 0....
Friday, March 21, 2014 at 10:01pm

Math
The number of tickets sold each day for an upcoming performance of Handels Messiah is given by N(x)=-0.4x^2+11.2x+13, where x is the number of days since the concert was first announced. When will daily ticket sales peak and how many tickets will be sold that day?
Friday, March 21, 2014 at 9:41pm

Economics HELP PLEASE!!!!
Can someone please help me with a hint to solve this problem?? I'm struggling really hard with this. "Consider an oligopolistic market with two firms. Each of them produces using a cost function given by c(q)=q^2. The aggregate demand in the market is given by 1000&#...
Friday, March 21, 2014 at 2:33pm

Algebra
1) There are two pet stores in zacharys town. There are dogs, cats, and hamsters at the first pet store. The second store has dogs, rabbits, and fish. Write a set that represents all of the different pets stores in the town. 4) The cheerleading squad is having a bake sale. ...
Friday, March 21, 2014 at 2:27pm

scholarship essay edit
can someone edit this? Throughout my life’s journey, I have come to attain two true passions - the first one being English studies. Since the very dawn of childhood, I have been known to bleed the calligraphic content of Gary Soto's brilliant poetry and breathe the ...
Friday, March 21, 2014 at 1:23pm

Math - PreCalc (12th Grade)
The function f(x) = 6x + 5 is defined over the interval [-1, 4]. If the interval is divided into n equal parts, what is the value of the right end point of the first rectangle?
Friday, March 21, 2014 at 11:42am

Chemistry-Repost for DrBob222
The reaction OH- + NH4+ = H20 + NH3 is kinetically first order in both reactants' concentrations. The rate constant is 2e10 1/M s. If 50 ml of .01 M NaOH is mixed with 50 ml of .01 M NH4CL, find the time required for the OH- concentration to reach 1e-4 M. Your answer: It ...
Friday, March 21, 2014 at 10:39am

Math ~ Check Answers ~
3. In the following list of data, find the range: 21, 28, 31, 35, 39, 43, 51, 60. 35 37 39****** 40 Pat recorded the weights of the first 10 fish she caught and released at Mirror Lake this season. The weights were 8 lb, 6 lb, 9 lb, 6 lb, 7 lb, 5 lb, 7 lb, 6 lb, 23 lb, and 6 ...
Thursday, March 20, 2014 at 10:19pm

Math ~ Check Answers ~ASAP
3. In the following list of data, find the range: 21, 28, 31, 35, 39, 43, 51, 60. 35 37 39****** 40 Pat recorded the weights of the first 10 fish she caught and released at Mirror Lake this season. The weights were 8 lb, 6 lb, 9 lb, 6 lb, 7 lb, 5 lb, 7 lb, 6 lb, 23 lb, and 6 ...
Thursday, March 20, 2014 at 10:08pm

Language arts help!!
1–6, read the play excerpt below and answer the questions that follow. Jaws of the Water ACT TWO At rise we see DAD, TINA, and MARK rushing in and out of the living room. Each enters carrying important items—such as sleeping bags, rain gear, and gallons of water—...
Thursday, March 20, 2014 at 8:20pm

Math economics HELP!!!
Can someone please help me with a hint to solve this problem?? I'm struggling really hard with this. Thanks!!! "Consider an oligopolistic market with two firms. Each of them produces using a cost function given by c(q)=q^2. The aggregate demand in the market is given ...
Thursday, March 20, 2014 at 6:05pm

Calculus Help STEVE
find y'' by implicit differentiation. 2x^3 + 3y^3 = 8 I got the first derivative as you but the problem was asking for second derivative by implicit diff. this is where i got confused. Thank you!!!
Thursday, March 20, 2014 at 5:51pm

CORE MATHS
The first two terms in the expansion of (1+ax/2)^10 + (1+bx)^10 in ascending powers of x., are 2 and 90x^2 Given that a is less than b find the values of the constants a and b . (11 marks) Thanks :)
Thursday, March 20, 2014 at 5:13pm

TO: DrBob222 science
1. Write the chemical formula for each of the following acids: a.) hydrocyanic acid b.) oxalic acid c.) chlorous acid d.) nitric acid 2. Write the acid name or chemical formula for each of the following: a.) HBr b.) sulfurous acid c.) HClO4 D.) phosphoric acid 3. First ...
Thursday, March 20, 2014 at 4:55pm

Algebra
1) There are two pet stores in zacharys town. There are dogs, cats, and hamsters at the first pet store. The second store has dogs, rabbits, and fish. Write a set that represents all of the different pets stores in the town. 4) The cheerleading squad is having a bake sale. ...
Thursday, March 20, 2014 at 4:12pm

Physics
A direct current power supply is connected to a circuit containing one resistor, and 1.5 A is drawn. If a second identical resistor is connected to the power supply in parallel with the first, how much current is drawn from the battery?
Thursday, March 20, 2014 at 1:01pm

Computer
Home work:- Write a program to read 5 records consists of first name, last name, id and grade. Assign the grade according to the following specifications: 0<g<= 50 F 50<g<=60 D 60< g<= 70 C 70<g<=90 B 90<g <=100 A Use Stringtokenizer and buffering...
Thursday, March 20, 2014 at 12:49pm

Math - PreCalc (12th Grade)
If Sn represents the sum of the squares of the first n natural numbers, use proof by induction to find which of the following expressions for Sn is true? A) Sn = n(n − 1)/3 B) Sn = n(2n − 1)/3 C) Sn = n(n + 1)/3 D) Sn = n(n + 1)(2n + 1)/3
Thursday, March 20, 2014 at 12:23pm

physics
If the speed of the cart at the first photogate is 2.3 m/s, and the speed of the cart at the first photogate is 1.8 m/s, what is the percentage change in the speed of the cart (LEAVE OUT the % symbol)?
Thursday, March 20, 2014 at 9:25am

physics
If the average time from one on state to the next one on the first photogate is 0.005 seconds, what is the speed of the cart at this point (LEAVE OUT the units of m/s)?
Thursday, March 20, 2014 at 9:19am

Chemistry
The energies, E, for the first few states of an unknown element are shown here in arbitrary units: n= 1, E=-21 n=2, E=-9 n=3, E=-4 n=4, E=-3 ...,... infinity, 0 A gaseous sample of this element is bombarded by photons of various energies (in these same units). Match each ...
Wednesday, March 19, 2014 at 10:33pm

Maths
A string of decorative lights is 28 ft long the first light on the string is 16 inches from the plug if the lights on the string are spaced 4 inches apart how many lights are there on the string
Wednesday, March 19, 2014 at 7:50pm

Chemistry
The reaction OH- + NH4+ = H20 + NH3 is kinetically first order in both reactants' concentrations. The rate constant is 2e10 1/M s. If 50 ml of .01 M NaOH is mixed with 50 ml of .01 M NH4CL, find the time required for the OH- concentration to reach 1e-4 M.
Wednesday, March 19, 2014 at 6:04pm

english
how would you start off an essay that is about the lack of privacy you have? (has to be in first person)
Wednesday, March 19, 2014 at 4:56pm

math
The first term of an AP is 8. The ratio of d 11th term to the 7th term is 5:8 calculate the common difference
Wednesday, March 19, 2014 at 1:40pm

Math - PreCalc (12th Grade)
What is the first natural number that causes the statement 1 + 3 + 5 +... + (2n − 1)<=4n − 1 to fail? A) 2 B) 3 C) 4 D) 5 E) 6
Wednesday, March 19, 2014 at 12:05pm

Math - PreCalc (12th Grade)
What is the first natural number that causes the statement:(2+3)^n<=4^n+3^n to fail? A) 1 B) 2 C) 3 D) 4 E) 5
Wednesday, March 19, 2014 at 11:56am

grammar
The patient’s first visit, to the office, was for lower back pain.
Wednesday, March 19, 2014 at 11:16am

Math - PreCalc (12th Grade)
Jake has decided upon three business ventures to invest in. The total cost of investing in all three ventures will be $15,000. Investing in the first venture will cost $3,000 more than investing in both the second and the third venture. According to Jake’s research, his ...
Wednesday, March 19, 2014 at 10:26am

English
Posted by rfvv on Wednesday, March 19, 2014 at 2:24am. 1. It's very noisy here. I can't stand it any more. (What does "it" refer to in the first sentence? What does "it" refer to in the second sentence? Are both the same? Is 'it' an ...
Wednesday, March 19, 2014 at 9:01am

English
1. It's very noisy here. I can't stand it any more. (What does "it" refer to in the first sentence? What does "it" refer to in the second sentence? Are both the same? Is 'it' an impersonal pronoun or just a pronoun which refers to something ...
Wednesday, March 19, 2014 at 2:24am

Applied Math (Biological application)
The deformation y(t) of heart muscle from its rest position after t seconds can be modelled as a spring-mass system, described by the differential equation: my" + vy' + ky = F(t) where m, v, and k are positive constants denoting the mass of the myocardial tissue, and ...
Wednesday, March 19, 2014 at 12:28am

Chemistry
Hello! I'm doing these questions for my chemistry homework, and I can only figure out the first one, I don't know how to do the rest, I'm completely stuck! Please help!! Thank you! 1.) For the reaction, calculate how many grams of the product form when 18.4g of Ca ...
Tuesday, March 18, 2014 at 10:55pm

Physics
(Need Help Only For Last Question! I figured out the first two.) A car of mass m = 1130 kg is traveling down a θ = 11 degree incline. When the car's speed is v0 = 11 m/s, a mechanical failure causes all four of its brakes to lock. The coefficient of kinetic friction ...
Tuesday, March 18, 2014 at 10:32pm

Math
The number of tickets sold each day for an upcoming performance is given by N(x)=-0.3x^2+9x+15, where x is the number of days since the concert was first announced. When will daily ticket sales peak and how many tickets will be sold that day?
Tuesday, March 18, 2014 at 10:06pm

social studies
1.D 2.B 4.C 1. the monumental cities of the incas demonstrated their A. extensive trade networks B. high level of organization C. interest in astronomy D. dependence on farming. 2. How does jose de san martin contribute to the formation of nations in the region? A. he became ...
Tuesday, March 18, 2014 at 2:50pm

English
Which of the following sentences from "Five Hours to Simla" best illustrates the mood of frustration? (1 point) • "After the first cacophony of screeching brakes and grinding gears. there followed the comparatively static hum of engines, and drivers waited ...
Tuesday, March 18, 2014 at 1:49pm

MATH QUIZ PLZ HELP
1.You roll a number cube numbered one to six 12 times. P(5) = two over three. What type of probability is illustrated and why? (1 point) experimental; the result is based on the number of possible outcomes experimental; the result is found by repeating an experiment ...
Tuesday, March 18, 2014 at 1:14pm

Accounting - need guidance
On January 1, 2012, Bartell Company sold its idle plant facility to Cooper Inc. for $1,050000. On this date, the plant had a depreciated cost of $735,000. Cooper paid $150,000 cash on January 1, 2012, and signed a $900,000 note bearing interest at 10%. The note was payable in ...
Tuesday, March 18, 2014 at 12:04pm

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