Wednesday
August 20, 2014

Posts by ANONYMOUS


Total # Posts: 69,742

Trig
Use the given information to evaluate sin (a+b). Exact answers only. No decimals. Tan a = 4/3, cos b ='-12/13; neither a nor b are in quadrant III.
May 7, 2014

Algebra
Pls help me with these problem solving sums ----------------------------------------- 1)You are building a rectangular brick patio surrounded by crushed stone in a rectangular courtyard.The crushed stone border has a uniform width x (in feet) you have enough money in your ...
May 7, 2014

Trig
Simplify each expression using fundamental identities. 1. Sin theta cot theta 2. 1-sin^2 theta / cos theta
May 7, 2014

math
Solve the problem. An average library contains at least 50 and at most 250 books. How many library owners must be polled to be certain that at least two owners have the same number of books in their libraries?
May 7, 2014

chemistry
If 15.0 grams of Iron (III) oxide reacts with 25.0 grams of Strontium phosphate, how many grans of Iron (III) phosphate will be produced?
May 7, 2014

Social Studies
1. During the War of 1812, the Americans were fighting for a) self-government b) freedom of the seas c) freedom from England Answer is B 2. The Americans were most successful on a) sea b) Lake Champlain and Lake Erie c) on land Answer: B 3. The English were most successful on ...
May 7, 2014

math
Use the graph below to answer the following question. 1.   Find the slope.  (1 point) 2 – –2 Use the graph below to answer the following question. 2.   Find the slope of the line. Describe how one variable changes in relation to the ...
May 7, 2014

Social Studies
After capturing Washington, the British attacked what city, which they failed to capture? New York, Statton Island
May 7, 2014

Check my answers :(
1.A 2.? 3.B
May 7, 2014

Check my answers :(
A rock climber grasps onto a ledge in the rock wall. How do the bones and muscles in his arm interact to allow him to hold on? photo of a man climbing a rock wall All of the muscles in his arm contract to hold his arm in position. His arm muscles work in pairs so that one ...
May 7, 2014

CHEMISTRY HELP !!!!
What is the formula for dicyanobis(ethylenediamine)zirconium(IV) nitrate? a. Zr[(CN)2(NO3)2(en)2] b. [Zr(CN)2(NO3)2(en)2] c. (NO3)2[Zr(CN)2(en)2] d. [Zr(CN)2(en)2](NO3)2 e. [Zr(NO3)2(en)2](CN)2 Sorry, I think the multiple choice part didn't show up.
May 7, 2014

CHEMISTRY HELP !!!!
what is the formula for dicyanobis (ethylenediamine) zirconium (IV) nitrate? Thanks!!!
May 7, 2014

Help ASAP, plz?
A rock climber grasps onto a ledge in the rock wall. How do the bones and muscles in his arm interact to allow him to hold on? photo of a man climbing a rock wall All of the muscles in his arm contract to hold his arm in position. His arm muscles work in pairs so that one ...
May 6, 2014

Physics
dont know
May 6, 2014

Physics
A 0.50 kg pendulum is pulled back and released. When the height is 0.60 m above its equilibrium position its speed is 1.9 m/s. What is the maximum height of the pendulum?
May 6, 2014

Algebra
a/(a+3) = (2a)/(a - 3) - 1
May 6, 2014

Physics
A mass vibrates at the end of a horizontal spring (k=125 N/m) along a frictionless surface reaching a maximum speed of 7.0 m/s. If the maximum displacement of the mass is 85.0 cm, what is the mass?
May 6, 2014

Physics
The speed of a hockey puck (mass=100.0 g) decreases from 45.00 m/s to 42.68 m/s in coasting 16.00 m across the ice. a) How much thermal energy was produced? b) What frictional force was acting on the puck?
May 6, 2014

Physics
A 75 g arrow is fired horizontally. The bow string exerts an average of 65 N on the arrow over a distance of 0.90 m. With what speed does the arrow leave the bow string?
May 6, 2014

Physics
A 75 g arrow is fired horizontally. the bow string exerts an average force of 65 N on the arrow over a distance of 0.90 m. With what speed does the arrow leave the bow string?
May 6, 2014

science 3 questions
A rock climber grasps onto a ledge in the rock wall. How do the bones and muscles in his arm interact to allow him to hold on? photo of a man climbing a rock wall All of the muscles in his arm contract to hold his arm in position. His arm muscles work in pairs so that one ...
May 6, 2014

chemistry
help
May 6, 2014

chemistry
A silver block, initially at 59.4∘C^\circ C, is submerged into 100.0 g{\rm g} of water at 25.3∘C^\circ C, in an insulated container. The final temperature of the mixture upon reaching thermal equilibrium is 27.6∘C^\circ C.
May 6, 2014

social studies
The British attempted two invasions of America from the sea. The first one was at ? (Baltimore) and the second one at ?(New York) 2. After capturing Washington, the British attacked what city, which they failed to capture? Answer: New York, Statton Island 3. On November 7, ...
May 6, 2014

Science
In which way does the circulatory system rely on the skeletal system? Glucose is secreted by compact bone as an energy source for blood. Spongy bone stores minerals needed by blood cells. Bones provide a source of oxygen to blood. Blood cells are produced in bone marrow.
May 6, 2014

Trigonometry.
Use the given information to evaluate cos (a-b). Cot a = 3/4, cot b = 24/25; pi<a<3pi/2, 3pi/2<b<2pi.
May 6, 2014

Trigonometry
Verify the identity. (Cos x - sin x)^2 + (cos x + sin x)^2=2
May 6, 2014

Trigonometry
Simplify each expression using the fundamental identities. 1. Sec x csc x / sec^2x+csc^2x 2. Sec x + tan x / sec x + tan x - cos x
May 6, 2014

English
I have to write a critical essay on Hamlet and I can't find a good topic to write about. I need something that will be easy because I am not good in writing essays that are more elaborate. Can somebody suggest a good topic that will be easy to write about in approximately ...
May 6, 2014

Social Studies
It's not that far from New York.The Appalachian Mountains aren't in the way but The Hudson River is.
May 6, 2014

Social Studies
Driving to Corning, NY from New York City, NY and walking from Corning, NY to Goat Island, Niagara Falls, you wouldn't cross any bodies of water, mountains, or deserts? Right? I searched but I didn't get anything, I just want to make sure.
May 6, 2014

Math
Use the given information to evaluate cos (a+b). Sin a = -7/25, cot b = -8/15. Neither a nor b are in quadrant IV. exact answers only. No decimals.
May 6, 2014

social studies
The British attempted two invasions of America from the sea. The first one was at ? (Baltimore) and the second one at ?(New York) 2. After capturing Washington, the British attacked what city, which they failed to capture? Answer: New York, Statton Island 3. On November 7, ...
May 6, 2014

social studies
The British attempted two invasions of America from the sea. The first one was at ? (Baltimore) and the second one at ?(New York) 2. After capturing Washington, the British attacked what city, which they failed to capture? Answer: New York, Statton Island 3. On November 7, ...
May 6, 2014

math
lou makes pancakes at a pancake house. he makes 12 pancakes in 4 minutes. at a rate, how long would it take him to make 54 pancakes
May 6, 2014

MATH
It is estimated that 17% of americans have blue eyes. A random sample of 9 americans is selected. 1. Find the mean number of blu-eyed people in a sample of 9 americans.
May 6, 2014

social studies
1. what name did the people give to the good ship "Constitution"? Answer: Old Ironsides 2. Andrew Jackson is often spoken of by what nickname? Answer: King Mob 3. England's practice of forcing our sailors to serve in her navy was called what? Answer: impressment ...
May 6, 2014

Math
a/(a+3) = (2a)/(a - 3) - 1
May 6, 2014

social studies
what land did the United States gain from the War of 1812? Was it Florida or Detroit
May 6, 2014

science
My answers are in the brackets Nitrogen is cycled through an ecosystem by both plants and ?(animals). Decomposers break down dead organisms and their waste products to release ?(ammonia) in a process called ?(nitrification) These ?(decomposers) can then be used by plants to ...
May 6, 2014

science
Nitrogen is cycled through an ecosystem by both plants and ?(animals). Decomposers break down dead organisms and their waste products to release ?(ammonia) in a process called ?(nitrification) These ?(decomposers) can then be used by plants to make amino acids. The process of ...
May 6, 2014

STAT
it is estimated that 17% of americans have blue eyes. A random sample of 9 americans is selected. Find the probability that the sample includes exactly 2 people with blue eyes. Find the probability that the sample includes at most 2 people with blue eyes. Find the mean number ...
May 6, 2014

English 10B
Which of the following conclusions about the speaker is best supported by the ideas and information in "From Emperor to Citizen?"
May 6, 2014

stat
it is estimated that 17% of americans have blue eyes. A random sample of 9 americans is selected. Find the probability that the sample includes exactly 2 people with blue eyes.
May 6, 2014

S.S
2A 1D?
May 6, 2014

S.S
3A 2D 1B
May 6, 2014

S.S
1.The three main geographic regions of Peru are the A. sierra, the rain forest, and the plateau B. pampas, the rain forest, and the montaña C. selva, the sierra, and the pampas D. sierra, the coastal plain, and the selva 2.When oil prices fell in the mid-1980s, ...
May 6, 2014

Accounting
b
May 6, 2014

Data Structure
But the question above state that a group of k villagers. can we assume that only 1 villager row over?
May 6, 2014

Chem Check Please!!!
Calculate for the electrochemical cell below, Ag(s) | AgCl(s) | Cl–(aq) || Cu2+(aq) | Cu(s) given the following standard reduction potentials. Cu2+(aq) + 2 e– -> Cu(s) E = +0.337 V AgCl(s) + e– -> Ag(s) + Cl–(aq) E = +0.222 V a. –...
May 6, 2014

Chem Check Please!!!
1) As bound ligands, which of the following causes the largest splitting of d-orbitals? a. phen b. H2O c. I– d. CN– e. C2O4^2– Answer D 2) The spectrochemical series a. lists ligands in order from monodentate to hexadentate. b. lists ligands in the order of ...
May 6, 2014

Chem Check Please!!!
If an octahedral iron(II) complex is diamagnetic, which of the following sets of conditions best describes the complex? a. low-spin, Delta 0 small b. low-spin, Delta 0 large c. high-spin, Delta 0 small d. high-spin, Delta 0 large e. none of these Answer C or D not sure
May 6, 2014

Chem Check Please!!!
All of the following statements concerning crystal field theory are true EXCEPT a. in low-spin complexes, electrons are concentrated in the dxy, dyz, and dxz orbitals. b. in an isolated atom or ion, the five d orbitals have identical energy. c. low-spin complexes contain the ...
May 6, 2014

Chem Check Please!!!
In an octahedral complex, electrons in dz^2 and dx^2-y^2 orbitals experience a greater repulsion from the lone pairs of electrons on ligands because these orbitals a. contain more electrons than the other three d orbitals. b. each contain one unpaired electron. c. are oriented...
May 6, 2014

CHEMISTRY HELP !!!!
What is the name of the compound having the formula [Cr(en)2(H2O)2]SO4? a. dihydroxydiethlyenediamminechromate(2) sulfate b. diaquabis(ethylenediamine)sulfatochromate(4) c. bis(ethylenediamine)diaquachromium(2) sulfato d. diaquabis(ethylenediamine)sulfatochromium (2) e. ...
May 6, 2014

chemistry
How much heat energy is needed to change the temperature of 25.00 mL of water from 5.0°C to 75.0°C? The molar heat capacity of water for this process Cp = 75.38 J/(mol °C), d = 1.00 g/mL.
May 6, 2014

physics
Low E on a guitar vibrates at 82.4 Hz and the guitar is 62.8 cm long. How long would the same string have to be to vibrate at high E 329.6 Hz. Assume that both strings vibrate at the fundamental frequency for the string.
May 6, 2014

history 11th grade
What are the perils of the amazon rain forest?
May 6, 2014

Physic
r = 0.23m m = 3.8kg d = 1.37m t = 2.2s y = -Vot + 1/2at^2 1.37m = 0 + 1/2a(2.2s)^2 a = 1.37m / 2.42s^2 a = 0.57m/s^2 T = -(3.8kg)(0.57m/s^2) + (3.8kg * 9.8m/s^2) T = -2.17N + 37.24N T = 35.07N Fy: Py - T = m1α T = Iα rT = cmr^2α (0.23m)(35.07N) = m2(0.23m)^2 * (...
May 6, 2014

Physic
A massless rope is wrapped around a hollow cylinder of radius 23 cm whose central axis is fixed in a horizontal position. A mass of 3.8 kg hangs from the rope and, starting from rest, moves 137 cm in 2.2 s. What is the mass of the cylinder? (Answer: 62kg) Answer is provided ...
May 6, 2014

Precalculus
1. In an arithmetic sequence, the fifth term, u5, is greater than the first term, u1. The difference between these terms is 36. a) find the common difference 9? The tenth term of the sequence is double the seventh term . b) find u1 2.5? 2. Consider the function f(x) = ax^3 -3x...
May 5, 2014

Math
Raimo borrowed $750 from Chris on October 30 and agreed to repay the debt with simple interest at the rate of 12.3% on May 10. How much interest was owed on May 10? Assume that February has 28 days.
May 5, 2014

biology
Which candy required more base per gram of candy sweet tarts or smarties
May 5, 2014

Math
Asher cashed in a one-year term deposit after only five months had elapsed. In order to do so, he accepted an interest rate penalty—a reduction from the scheduled 5.5% rate of simple interest. If he was paid $145.83 interest on the $10,000 term deposit, what reduction was...
May 5, 2014

Algebra
That helps
May 5, 2014

Algebra
Divide. [(X^2 +6+9)/(X-1)]/(X^2-9)/(x^2-2x+1) • [(x+3)(x-1)]/(x-3) • [(x-3)(x+1)]/(x+3) • [(x+3)(x+1)/(x-3) • [(x-3)(x-1)]/x+3) How?
May 5, 2014

Science
It kind of helped.
May 5, 2014

Science
Human blood type is determined by co-dominant alleles. There are three different alleles, know as I^a and I^b alleles are co-dominant and the i allele is recessive. The possible human phenotypes for blood group are type A, type B, type AB, or type O. Type A and B individuals ...
May 5, 2014

Precalculus
Solve for x given the interval of [0,2pi). cos^2x=2+2sinx I got (3pi)/2 or 270 degrees.. By the way, does the notation [0,2pi) mean 0<=x<2 pi or 360?
May 5, 2014

Social Studies
In what ways could the American Revolution be considered a Civil War? The Patriots opposed the Loyalists. Those who supported the King were known as Loyalists. Those who supported separation from the King were called Patriots. An agreement could not be reached between the two ...
May 5, 2014

english
traditional african marriage is an advantage for men only ,not women?
May 5, 2014

Science help ASAP
1. In which way does the circulatory system rely on the skeletal system? Glucose is secreted by compact bone as an energy source for blood. Spongy bone stores minerals needed by blood cells. Bones provide a source of oxygen to blood. Blood cells are produced in bone marrow. 2...
May 5, 2014

Math
How did it add up to 1.7/.7r?
May 5, 2014

Math
Jane walks one mile from her house to her grandparents’ house. Then she returns home, walking with her grandfather. Her return rate is 70% of her normal walking rate. Let r represent her normal walking rate. a. Write an expression for the amount of time Jane spends ...
May 5, 2014

english
I like all of English.
May 5, 2014

english
What should you be if you like English, learning other countries cultures, and art, but not painting or anything like that. I am thinking about becoming an interior designer or lawyer. Thoughts or ideas?
May 5, 2014

physics
Level I: If a rider accidentally releases an object when the ride is at maximum height and top speed, how far away (horizontally) would that object land, assuming negligible air resistance? If viewed from above, what would the path of that object look like?
May 5, 2014

help.
What should you be if you like English, learning other countries cultures, and art, but not painting or anything like that.
May 5, 2014

Social Studies
Explain why you think Matthew Lyon is an important figure in American History and why he should be included in the Register. Would it be that no other American has illustrated more thoroughly than Matthew Lyon the excellence of democratic institutions in affording to every man...
May 5, 2014

Math
An invoice states that interest will be charged on overdue accounts at the rate of 1% per month. What will the interest charges be on a $3760 billing that is three months overdue?
May 5, 2014

physics
A crane slowly lifts a cement slab weighing 2,500 N to a height of 12 m. The slab is accidentally dropped. What is its KE as it hits the ground?
May 5, 2014

math
A is $103.20 but as for B the question doesn't make sense because there isn't enough information. Is $750 the minimum balance? Is the account below $750 at the time that he would be available for the annual interest?
May 5, 2014

Science
Explain the energy transformations during skydiving? please note: that I need to EXPLAIN!!! Thank you very much in advance...your help is very much appreciated!! x
May 5, 2014

reading- suffix
Servant - one who serves Merchant - one who trades Band assistant - one who assists in a band
May 5, 2014

Social Studies
Explain why you think Matthew Lyon is an important figure in American History and why he should be included in the Register. Would it be for him being the first person to be put on trial under the Sedition Act? He opposed going to war against France and objected the land tax ...
May 5, 2014

Math
565.49 is right.
May 5, 2014

Math
I=prt 6800(0.077)13/12)=565.49 ??
May 5, 2014

Math
I = Prt I = 6800(7.7)(1.8) I = 9424.8 ... I think
May 5, 2014

Math
how you getting 5236 ?
May 5, 2014

Math
Montel loaned $6800 to a friend for 13 months at an annual rate of 7.7% simple interest. How much interest did the borrower owe?
May 5, 2014

math
((a)/(a + 3)) - ((4)/(a + 5))
May 5, 2014

Science
Explain the energy transformations during skydiving? please note: that I need to EXPLAIN!!! Thank you very much in advance...your help is very much appreciated!! x
May 5, 2014

Chem
The following results were obtained when a sample of pineapple juice was analyzed to determine its vitamin C content. A 19.8 mL sample of pineapple juice was placed in a flask with 20 ml of 0.5 M H2SO4, 1.0 g of potassium iodide, KI, and 25.00 mL of 0.01988 M potassium iodate...
May 5, 2014

Environmental Science
Subsistence vs. Industrial Agriculture Which type of agriculture is more sustainable? Why
May 5, 2014

Enviroinmental Science
Which type of agriculture is more sustainable? WhySubsistence vs. Industrial Agriculture?
May 5, 2014

Programming
Develop a menu-driven program that inputs two numbers and, at the user's option, finds their sum, difference, product, or quotient.
May 5, 2014

math
As compared to its first year of operation, ABC Company grew 8% in the second year and an additional 2% per year for the next two years. If total growth for years 2-4 was $45,000 over the first year’s sales of $150,000, how much did ABC Company grow in year 2?
May 5, 2014

english
Which propaganda technique is used in this sentence? The candidate I endorse believes to his very soul that this change would destroy this lovely community and its soul by disrupting you, its heart and soul.
May 5, 2014

maths
Determine the length and breadth of a rectangle if the length is 3cm less than twice the breadth, and the perimeter is 18 .
May 5, 2014

Astro-Physics
Imagine you are in a spaceship one million km from a black hole of mass 2×1030 kg. Initially you are flying directly away from it at a velocity of 12.8 km/s. Using the n-body approximation, what is your velocity one second later? Type your answer in metres per second?
May 5, 2014

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