Tuesday
May 3, 2016

# Posts by sarah

Total # Posts: 5,380

Math
Find the rotation in revolutions per minute given the angular speed and the radius given the linear speed and the rate of rotation. 1. w= 2.7 rad/s 2. v=24.8 m/s, 120 rev/min 3. w= 4/3Pi rad/hr Please help me with these problems! I am a visual learner and I learn best when ...
May 2, 2016

Math
May 2, 2016

Math
Meredith's new scale measures in both pounds and kilograms. The information on the box says the scale has a weight limit of 200 kilograms or 440 pounds. Using this information, approximate the unit rates of kilograms per pound and pounds per kilogram, to the nearest ...
May 2, 2016

Math/ELA
What can I do now as a 7th grader to prepare and save for college
April 27, 2016

Chem
Consider the following balanced equation: 2N2H4(g)+N2O4(g)→3N2(g)+4H2O(g) Complete the following table showing the appropriate number of moles of reactants and products. If the number of moles of a reactant is provided, fill in the required amount of the other reactant, ...
April 27, 2016

Calculus
two small planes take off from the same airport at the same time. One travels north at 200 km/h, and the other, west at 150 km/h. If the planes fly at the same altitude, how fast are they separating after 2 hours?
April 25, 2016

organic chemistry
Apart from the fact that between the two structures, only cyclohexe-4-ene-cis-1,2-dicarboxylic acid has the OH group shown on the IR spectrum. In what other majors way will the IR spectrum of cyclohex-4-ene-cis-1,2-dicorboxylic anhydride differ from the IR spectrum of ...
April 24, 2016

The bases of trapezoid $ABCD$ are $\overline{AB}$ and $\overline{CD}$. We are given that $CD = 8$, $AD = BC = 7$, and $BD = 9$. Find the area of the trapezoid.
April 23, 2016

History
“Without consideration of ‘traditions’ and prejudices, it [Germany] must find the courage to gather our people and their strength for an advance along the road that will lead this people from its present restricted living space to new land and soil, and hence ...
April 22, 2016

Precalculs
solve using matricies x+2y+3z=7 -x+2y-z=1 -x+y-2z=-2 x= y= z= ive tried everyway I can think of please help
April 21, 2016

History
What was the Columbian Exchange? A. The exchange of new goods globally as a result of European exploration B. A trading post established by Christopher Columbus C. An economic system set up by Christopher Columbus in the Americas D. The trading of goods from Columbia to North ...
April 20, 2016

History
thank you..its B
April 20, 2016

History
Sir Thomas More was executed because he A. would not stand with Henry VIII against the Protestant revolt. B. would not accept Henry VIII as head of the Church in England. C. protested the corruption of the Roman Catholic Church. D. set up a utopian community based on Calvinist...
April 20, 2016

Math
Use the acidity model given by pH = −log[H+], where acidity (pH) is a measure of the hydrogen ion concentration [H+] (measured in moles of hydrogen per liter) of a solution. Compute [H+] for a solution in which pH = 6.2. (Enter your answer in scientific notation. Round ...
April 20, 2016

Medians $\overline{AX}$ and $\overline{BY}$ of $\triangle ABC$ are perpendicular at point $G$. Prove that $AB = CG$. In your diagram, $\angle AGB$ should appear to be a right angle.
April 19, 2016

Regression Analysis: Avg. Tot. Score versus %Takers, T/S Ratio Model Summary S R-sq R-sq(adj) R-sq(pred) 34.2385 79.91% 79.06% 76.83% Coefficients Term Coef SE Coef T-Value P-Value VIF Constant 1118.5 39.5 28.34 0.000 %Takers -2.547 0.187 -13.62 0.000 1.05 T/S Ratio -3.73 2....
April 19, 2016

Math
Mr. Jacobs budgeted $1,200 for tiles his sketch of the floor requires him to use 38 white tiles each white tile cost$12
April 18, 2016

English
Ok, thanks. But how do I actually write the paragraph? As to say, in the 1st sentence what should I write? and same to the 2nd, 3rd , 4th, 5th, and so on. As an example..
April 16, 2016

English
How do I write a paragraph response based on a book-chapter? Thanks in advance!
April 16, 2016

Personal Finance
To stretch your income during retirement, you could: A. skip leisure activities. B. cut your food expenditures. C. cancel your life and property insurance. D. use your skills and time instead of your money. I think its A..
April 15, 2016

Personal Finance
If overall interest rates in the economy rise, a corporate bond with a fixed interest rate will generally: A. increase in value. B. decrease in value. C. remain unchanged. D. become worthless. B?
April 15, 2016

Math
Thank you
April 13, 2016

Math
Terry buys a shirt for $14.99 and a pair of jeans for$39.99. If the sales tax is 8.25%, what is the total price Terry pays for the items? Can someone please show me how to work this problem?
April 13, 2016

english
What best completes this statement about "London, 1802"? In Lines 9 and 10 Wordsworth uses _____. personification metaphor simile allusion line9 Thy soul was like a star, and dwelt apart; line10 Thou hadst a voice whose sound was like the Sea:
April 12, 2016

EASY Pre-Algebra
In the following situation, determine whether you are asked to determine the number of permutations or combinations. Then do the calculation. How many ways can the four offices of chairman, vice chairman, secretary, and treasurer be filled from a club with 28 members?
April 11, 2016

Physics
A ball is thrown from the ground toward a cliff of height h with a speed of 30.0 m/s and an angle of 60o above horizontal. It lands on the cliff 4.00 s later. How high is the cliff? Answer: 25.5 m But having difficulty getting this answer
April 10, 2016

Physics
You take a trip in your car. Starting from rest, you accelerate at 1.00 m/s2 for 10.0 s, heading north. You then stop accelerating and immediately head west at a constant speed for an additional 20.0 s, at which point, you crash into a building coming to an instant stop. At ...
April 10, 2016

Calculus
A landscape architect wished to enclose a rectangular garden on one side by a brick wall costing $60/ft and on the other three sides by a metal fence costing$50/ft. If the area of the garden is 102 square feet, find the dimensions of the garden that minimize the cost.
April 9, 2016

speech for history
April 9, 2016

1. Which of the following is ture about the electric charges below?  A. The ball on the right had a positive charge and the ball on the left has a negative charge.  B. The ball on the left has a positive change and the ball on the right has a negative charge.  C...
April 8, 2016

Chemistry
Both ethanol (CH3CH2OH, MM=46.07g/mol) and methanol (CH3OH, MM=32.04g/mol) have been considered as fuels for automobiles. Which is the better fuel, on a per gram basis, when burned with oxygen? CH3CH2OH(g) DeltaHf(KJ/molrxn) = -235.10 H3OH (g) DeltaHf(KJ/molrxn) = -200.66 H2O...
April 7, 2016

Writing
Please, need help. Anyone, I'll appreciated! For western history class, what did Arab culture look like before the appearance of Muhammad and Islam?
April 4, 2016

English
Is Mercutio a foil to the Nurse? I think they are not, but can you please check my answer? Thanks
April 3, 2016

Math
A girl bought mangoes at 7.50 each. There were two types of mangoes: good ones and not so good ones. She sold the good ones at 7.90 each and the not-so-good ones at 7.70 each. If she earned 34, how many mangoes did she buy?
April 3, 2016

Chemistry
A 26.8 mL sample of a solution of RbOH is neutralized by 15.71 mL of a 1.918 M solution of HBr. What is the molarity of the RbOH solution?
April 1, 2016

social studies
what was the supreme court's ruling on the dred scott case?
April 1, 2016

Social Studies 9
Purpose some reasons why women were unable to keep leadership positions during the rein of terror? There is nothing about this in my textbook.
March 30, 2016

math
90% as a decimal is 0.9. If you multiply 0.9(the result on the test)x90 (how many questions there were) you get 81. Peggy got 81 questions right out of 90 which is 90%.
March 30, 2016

English
In class, we are studying Romeo and Juliet. Do you know what tragedies afflicted Peter ,the servant to the Nurse? I know that the Nurse was affected by the death of her husband and child. However, I don't know what tragedy affected the apothecary or minstrels. Was the ...
March 30, 2016

english
so (not come unless you invite him)
March 30, 2016

english
can anyone help
March 30, 2016

english
(will not) ???
March 30, 2016

english
Put parentheses around the adverb clause by placing the parentheses in their correct locations. He will not come unless you invite him.
March 30, 2016

english
parentheses around (because he canceled the party)
March 30, 2016

english
Put parentheses around the adverb clause by placing the parentheses in their correct locations. He hasn't showed up here because he canceled the party.
March 30, 2016

english
thank you
March 30, 2016

english
would it be (in case i am called away)
March 30, 2016

english
Put parentheses around the adverb clause by placing the parentheses in their correct locations. Please get my mail in case i am called away.
March 30, 2016

Chemistry
@DrBob222 I got the last question that I posted wrong and I solved it the same way. Could you show me the answer and how you got it? My test is Friday and this is a practice problem. Suppose that 30 mL of 0.5 M CsOH and 55 mL of 0.1 M NaHS are mixed. What is the K for the ...
March 29, 2016

Chemistry
Suppose that 30 mL of 0.5 M CsOH and 55 mL of 0.1 M NaHS are mixed. What is the K for the dominant equilibrium in terms of Ka's, Kb's, Kw etc.? Ka of HS- 1/Ka of HS- Kb of OH- 1/Kb of OH- Kb of S-2 1/Kb of S-2 Kw 1/Kw There is no reaction.
March 29, 2016

Chemistry
Suppose that 85 mL of 0.4 M NaF and 50 mL of 0.4 M HCl are mixed. What is the K for the dominant equilibrium in terms of Ka's, Kb's, Kw etc.? Ka of HCl 1/Ka of HCl Ka of HF 1/Ka of HF Kb of F- 1/Kb of F- Kb of Cl- 1/Kb of Cl- Kw 1/Kw There is no reaction.
March 29, 2016

math
a 12.0 gallon gasoline tank holds 66.0 pounds of gasoline. If this gasoline cost $3.50/gallon, what is the cost of 1 gram of gasoline.. I need help with just the set up part.. I don't know where to start.. help please March 29, 2016 Chemistry What is the complete ionic equation for the following reaction? Aqueous iron(III) sulfate is added to aqueous sodium sulfide to produce solid iron(III) sulfide and aqueous sodium sulfate. March 28, 2016 EASY Math The equation V = -2000t + 20,000 describes the value in dollars of a certain model of car after it is t years old. If a car is worth$14,000, find the age of the car.
March 28, 2016

Statistics
How do I find a P VALUE given the Z statistic using the empirical rule? Doing this by hand
March 28, 2016

Statistics
How do I find a p value given the Z statistic using the empirical rule?
March 28, 2016

Math
The equation V = -2000t + 20,000 describes the value in dollars of a certain model of car after it is t years old. If a car is worth $14,000, find the age of the car. March 27, 2016 English grammar 1. Some of the pie IS missing 2. All of the pies ARE missing March 27, 2016 Calculus Suppose you are in a room that is a*10 meters. You can walk normally along the "a" meter long wall at "s" meters per second and crab walk in any direction at 1 meter per second. You start at one corner of the room, walk normally along the wall of length &... March 25, 2016 Calculus Suppose x; y, and z are positive numbers that sum to 10. What is the largest possible value of xy + xz + yz? (a) First, suppose that z is a fixed parameter. Then we have to find nonnegative numbers x and y (depending on the fixed value z such that x+y = 10-􀀀z), such ... March 25, 2016 STATISTICS PLEASE HELP An HR manager at a large agricultural equipment company is considering proposingputting the sales staff on 4 day - 10 hours/day work weeks, instead of their current 5day - 8 hours/day week. It is believed that this will decrease the amount of drivingthey must do during a ... March 24, 2016 Statistics What is the critical value in this question? Assume that we randomly sample 200 residents of Indiana and ask them if they favor having the government issue marriage licenses to same-sex couples. 104 say that the do; 96 don’t. Test at the 5% level whether the population ... March 24, 2016 math How can you find the volume of a rectanglar prism using a model?!!! March 23, 2016 chemistry 3NO2(g) + H2O(l) → 2HNO3(l) + NO(g) How many moles of nitric acid are produced starting from 5.00 moles of NO2(g) and 2.00 moles of water? Please help, March 23, 2016 Chem How many oxygen atoms are present in 2.00 millimoles of H2SO4? March 22, 2016 magh suppose you put money into teo different bank accounts. In account #1 you deposit$500 and you will be earning 6% interest compounded quarterly. in account #2 you deposit $600 and you will be earning 5% interest compounded annually. Which statement below best describes the ... March 21, 2016 Chemistry When 28g calcium reacts with 25 grams oxygen, how many grams calcium oxide form? I have 2Ca+ 2O2= 4CaO its is not working. Stoichemistry. I have the Ca as the reactant that is limiting? Please help. March 20, 2016 math Find c and I. Choose the right answers. Hint: c = total of payments - amount financed Amount Financed (m) =$3,500 Number of Payments per year (y) = 12 Number of Payments (n) = 36 36 payments of $104.50 each. To the nearest penny, total interest(c) =$ To the nearest tenth, I =
March 16, 2016

Health
it could be either a or b is it or would it just be a
March 16, 2016

math
A shirt is on sale for $12.75.this is 15percent off the original price.what was the original price of the shirt? March 9, 2016 English I think its D I'm not sure March 8, 2016 English Roosevelt is arguing that journalists must only attack misconduct when they have valid proof. They must not dig just for the sake of digging; it is offensive to good Americans. Which statement most effectively argues against this claim? a) Even sensational journalism is ... March 8, 2016 math In the theory of relativity, the mass of a particle with speed v is m=f(v)=m01−v2/c2√, where m0 is the rest mass of the particle and c is the speed of light in a vacuum. Letting m0=1, find f−1(10). f−1(10)= March 8, 2016 Math A car fits onto a golden rectangle with a length of 12 ft. What is the cars width? Write your answer in simplified radical form and rounded to the nearest tenth of a foot. March 7, 2016 Statistics A bolt manufacturer is using a hypothesis test with α = 0.01 to see if the diameter of their 0.75 cm diameter bolts are being manufactured properly. The goal is to have the average bolt diameter be 0.75 ± 0.0075 cms. March 7, 2016 Statistics Drug clinical trials are analyzed using hypothesis testing methods. As we’ve discussed, the null hypothesis in the effective stage of such trials is that the drug being tested is ineffective. The alternative, of course, is that the drug is effective. Explain why such ... March 6, 2016 Statistics Recall that the power (1 – β) of a hypothesis test is the probability that we will reject the null hypothesis given that it is false; that is, the probability that we will correctly reject the null hypothesis. All other things being equal, which of the following ... March 6, 2016 College history The choice are A.) elementary school B.) Adulthood. C.) high school and D.) College That's why I'm confused I don't know if it's saying when it started or when it was mostly studied March 5, 2016 College history Social order and norms of behavior are often learned in what era or school time? I think it's either college or adulthood March 5, 2016 History A Story that contains little or no policy content and is not related to the days event but that commonly discussed popular personalities and is designed to draw greater viewer interest is what? I think is biased media coverage March 5, 2016 Science How does lustre affect the amount of heat being absorbed by a black can March 4, 2016 MATH The answers don't seem to be correct? March 1, 2016 MATH Suppose f(x)=3x−2. Then f(1) = f(t) = f(x2) = f(f(x)) = March 1, 2016 matth Let f(x)=6x−1 and g(x)=3−x2. Evaluate the following: 1. f(g(0)) March 1, 2016 English II what was the correct one? March 1, 2016 Math A cheese pizza costs$5. Additional toppings cost $1.50 each. Write and graph an equation in two variables that represents the total cost of a pizza. February 29, 2016 Math 7B It was 1. A 2. A February 29, 2016 Math 7B A bag contains 4 white, 3 blue, and 5 red marbles. 1. Find the probability of choosing a blue marble, then a red marble if the marbles are not replaced. a. 5/44 b. 15/35 c. 2/3 (i pick this) 2. 1/15 2. Find the probability of choosing two white marbles in a row. a. 1/11 b. 1/9... February 29, 2016 Art 6B It was D February 29, 2016 Art 6B Ok thank you February 29, 2016 Art 6B For years, community art was created by a professional for the enjoyment or education of a public group. how did the definition change in the nineteenth century? a. community art was now also exibited in museums. b. community art was now also created to spark a revolution. c. ... February 29, 2016 Music What's the scale of the G? February 28, 2016 chemistry what would be observed when combining an aqueous mixture of: potassium carbonate and hydrochloric acid, zinc chloride and silver nitrate, magnesium chloride and sodium hydroxide, ammonium nitrate and sodium hydroxide? February 28, 2016 chemistry 1.what are the functions of pH? February 28, 2016 Biology please assist 1. Where is pH found? 2.what is the function of pH? 3.what principle guides the phenomenon of pH? 4.what is acid rain ?how is it related to pH values? February 27, 2016 finance A 10-year bond has a coupon rate of 7% annually and a principal payment of$1,000.00. Other similar bonds are paying 9% annually. To determine the value of this bond you must:'
February 27, 2016

Writing
Why is it hard to write? I've always had trouble with it, I thought that by now I would've gotten better at it, but unfortunately, I'm even worse than before.
February 26, 2016

Writing
Help, please!!!! I need to write a paragraph How do I write a good one? What types of paragraphs are there?
February 26, 2016

History
What led to the fall of the Roman Empire in Western Europe, specifically in terms of political instability, economic and social problems, weakening frontiers, and the split of the empire. This is a study guide question. I just need some help figuring out a good response to ...
February 25, 2016

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