Sunday

July 5, 2015

July 5, 2015

Total # Posts: 82,666

**Art**

#3 Is A.
*April 27, 2015*

**Algebra**

At Central High School, the sophomore class has 60 more students than the freshman class. The junior class has 50 fewer than twice the number of students in the freshman class. The senior class is three times as large as the freshman class. If there are a total of 1,424 ...
*April 27, 2015*

**PHYSICS**

How do I solve this? A satellite has a mass of 5949 kg and is in a circular orbit 4.07 × 105 m above the surface of a planet. The period of the orbit is 1.9 hours. The radius of the planet is 4.55 × 106 m. What would be the true weight of the satellite if it were ...
*April 27, 2015*

**World Geo, Help pls**

9 is Dutch.
*April 27, 2015*

**Accounting **

DeWeese Corporation issues $400,000 of 8%, 5-year bonds on January 1, 2015, at 105. Assuming that the straight-line method is used to amortize the premium, what is the total amount of interest expense for 2015?
*April 27, 2015*

**Civics**

thanks!
*April 27, 2015*

**Civics**

In which type of government would people elect officials to make government decisions? Monarchy Direct Democracy Representative Democracy*** Autocracy
*April 27, 2015*

**Math**

Solve the equations to the nearest tenth and use the given restrictions. 2. sin theta = -0.204, for 90 degs < theta < 270 degs Ans: 191.8 degs?
*April 27, 2015*

**Civics**

Thanks! can u help me with a couple more?
*April 27, 2015*

**Civics**

Then Autocracy, oligarchy, democracy ? I thought this 1st but double guessed my self.
*April 27, 2015*

**Civics**

Which order lists government types from the least power for the people to the most? Oligarchy, autocracy, republic Autocracy, oligarchy, democracy Democracy, unitary, parliamentary Federation, republic, unitary***
*April 27, 2015*

**maths**

Imagine that you have five blue socks and five brown socks in a drawer that are not paired up. How many socks must you take out from the drawer (without looking) to be sure of getting a pair of the same color?
*April 27, 2015*

**Accounting**

Louis Welch is general manager of United Salons. During 2014, Welch worked for the company all year at a $10,200 monthly salary. He also earned a year-end bonus equal to 10% of his annual salary. Welch’s federal income tax withheld during 2014 was $850 per month, plus $...
*April 27, 2015*

**Math**

rcsdk12 . org/cms/lib04/NY01001156/Centricity/Domain/5668/10.1%20Solid%20Geometry%20Classwork.pdf In question 4, is the first choice the answer?
*April 27, 2015*

**Math**

Solve the equations to the nearest tenth and use the given restrictions. 2. sin theta = -0.204, for 90 degs < theta < 270 degs Ans: 191.8 degs?
*April 27, 2015*

**Math**

Solve the equations to the nearest tenth and use the given restrictions. 1. tan theta = 8.055, for 90 degs < theta < 270 degs. Ans: 262.9 degs?
*April 27, 2015*

**probability**

call from Example 1 that whenever Suzan sees a bag of marbles, she grabs a handful at random. She has seen a bag containing three red marbles, two green ones, four white ones, and two purple ones. She grabs eight of them. Find the probability of the following event, expressing...
*April 27, 2015*

**Math**

If sin 0 = -3 / 5 and pi < 0 < 3pi / 2, then tan 0 = ? F. -5 / 4 G. -3 / 4 H. -3 / 5 J. 3 / 4 K. 4 / 5
*April 27, 2015*

**Chemistry **

A 0.642 g sample of an unknown gas was collected over water at 25 C and 1.04 atm. The collection cylinder contained 151.3 mL of gas after the sample was released. Find the molar mass of the unknown gas?
*April 27, 2015*

**Chemistry **

Samples of NH3 and 02 are placed in a rigid container. When the equilibrium below is established, the partial pressure of H2O is 0.784 atm. What is the partial erasure of NO when the system is at equilibrium? 4NH3 + 5O2 -----> 4NO + 6H2O
*April 27, 2015*

**math**

Thank you
*April 27, 2015*

**Math**

Solve each equation to the nearest tenth and use the given restrictions. sin θ = -0.204 for 90 degrees < θ < 270 degrees. I don't get this. Is this supposed to be restricted to quadrants 2 and 3? Then it doesn't seem possible to get a value that will be...
*April 26, 2015*

**Math**

and the third one I would say 13:17 Like I explained above why I say 13 is tails.
*April 26, 2015*

**Math**

Wouldn't it be 17:13? To find heads to tails won't you need to subtract 30 - 17 because she tossed the coin 30 times, got HEADS 17 times, and there are only two things she could get, which is heads and tails.. So, 13 tails. That's what I would think 17:13. Does ...
*April 26, 2015*

**Math**

What do you think? heads to coin tosses. She tossed the coin 30 times and got 17 heads, so 17:30. It's 17:30 because it asks heads to coins. heads first, then coins. What do you think the second one is?
*April 26, 2015*

**p.e**

I mean is it A
*April 26, 2015*

**p.e**

Air pollutants can do all of the following except A. reduce your protection from the sun's radiation B. cause discoloration to your hair C. damage the respiratory system D. enter bloodstream and harm other parts of the body** Check pleaase
*April 26, 2015*

**math**

please help me with this one too! : if it costs about $0.10 per week to feed a snake, how much does it cost to feed 35 snakes for 4 wks?
*April 26, 2015*

**Math**

Ms.Sue, is my answer correct? $5,406,380?
*April 26, 2015*

**Math**

If it costs an average of $14 each day to feed each of the 1058 zoo animals, what is the annual cost for feeding all the animals?
*April 26, 2015*

**math**

She can
*April 26, 2015*

**chemistry **

What is the pH of a 0.2 M solution of pyridinium chloride (C5H5NHCl)? Kb for pyridine (C5H5N) is 1.5 × 10−9 . 1. 8.824 2. 2.788 3. 4.761 4. 3.068 5. 3.308 6. 2.698 7. 2.938 8. 5.176 9. 9.239
*April 26, 2015*

**chemistry **

Arrange the acids I) hydrogen selenate ion (HSeO− 4 ), pKa = 1.92; II) phosphoric acid (H3PO4), pKa = 2.12; III) selenous acid (H2SeO3), pKa = 2.46; IV) phosphorous acid (H3PO3), pKa1 = 2.00; in increasing order of strengths. 1. I, III, II, IV 2. None of these 3. I, III...
*April 26, 2015*

**chemistry **

Which of the following 0.10 M aqueous solutions gives the LOWEST pH? 1. CH3COOH (pKa = 4.75) 2. CCl3COOH (pKa = 0.52) 3. HF (pKa = 3.45) 4. H3PO4 (pKa1 = 2.12) 5. Because all are acids, the pH is the same for all solutions
*April 26, 2015*

**math**

true
*April 26, 2015*

**math**

If the length of each dimension of the rectangular prism is cut in half, then surface area will be 1/4 of the original surface area. true or false
*April 26, 2015*

**PHYSICS**

A satellite has a mass of 5949 kg and is in a circular orbit 4.07 × 105 m above the surface of a planet. The period of the orbit is 1.9 hours. The radius of the planet is 4.55 × 106 m. What would be the true weight of the satellite if it were at rest on the planet...
*April 26, 2015*

**Math**

write the equation y+3=1/3x in general form.
*April 26, 2015*

**physics**

A charge of -3.00 µC is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass (radius = 0.115 m). The charges on the circle are -4.70 µC at the position due north and +5.00 µC at the position due east. What is the ...
*April 26, 2015*

**physics**

A charge of +3.7 ✕ 10-5 C is located at a place where there is an electric field that points due east and has a magnitude of 16400 N/C. What are the magnitude and direction of the force acting on the charge?
*April 26, 2015*

**physics**

The force of repulsion that two like charges exert on each other is 3.2 N. What will the force be if the distance between the charges is increased to 4 times its original value?
*April 26, 2015*

**physics**

A charge of -3.00 µC is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass (radius = 0.115 m). The charges on the circle are -4.70 µC at the position due north and +5.00 µC at the position due east. What is the ...
*April 26, 2015*

**physics**

Consider three identical metal spheres, A, B, and C. Sphere A carries a charge of -6q. Sphere B carries a charge of -5q. Sphere C carries no net charge. Spheres A and B are touched together and then separated. Sphere C is then touched to sphere A and separated from it. Lastly...
*April 26, 2015*

**calculus**

Given the relationship 2x^2 + y^3 =10, with y > 0 and dy/dt = 3 units/min., find the value of dx/ dt at the instant x = 1 unit.
*April 26, 2015*

**calculus**

Given the relationship 2x^2 + y^3 =10, with y > 0 and dy, dt = 3 units/min., find the value of dx, dt at the instant x = 1 unit.
*April 26, 2015*

**Physics**

An observer stands 25 m behind a marksman practicing at a rifle range. The marksman fires the rifle horizontally, the speed of the bullets is 840 m/s, and the air temperature is 20 °C. How far does each bullet travel before the observer hears the report of the rifle? ...
*April 26, 2015*

**PHYSICS**

By accident, a large plate is dropped and breaks into three pieces. The pieces fly apart parallel to the floor. As the plate falls, its momentum has only a vertical component, and no component parallel to the floor. After the collision, the component of the total momentum ...
*April 26, 2015*

**Calculus**

Find the average value of f(x) on the interval [-1, 3] when f'(x)=3x^2-6x and f(2)=0.
*April 26, 2015*

**PHYSICS**

at the top, normal force=mg-v^2/r at the bottom, normalforce=mg+v^2/r
*April 26, 2015*

**chemistry**

Thank You
*April 26, 2015*

**PHYSICS**

the vector sum of the initial momentums is equal to the final vector momenmtum MaVaE+MbVbN=(Ma+Mb)V well, let Ma' be Ma/(Ma+Mb) and Mb' be Mb/(Ma+Mb) V=Ma'*VaE+Mb'*VbN magnitude.. V^2=(Ma'Va)^2+(Mb'*Vb)^2 direction (degrees N of E) Theta=arctan((Mb'...
*April 26, 2015*

**Calculus**

Nevermind. I got it
*April 26, 2015*

**Calculus**

How do I solve it without L'Hospital's Rule?
*April 26, 2015*

**Calculus**

Find limit as x approaches 0 [7x/(sqrt(x+4)-2)]
*April 26, 2015*

**Physics**

25.4
*April 26, 2015*

**Chemistry 2**

Does the reaction P4(s, white) + 5 O2(g) P4O10(s) occur spontaneously at 298 K and standard state conditions? Calculate the value of capital delta S°univ. Honestly do not know where to start.
*April 26, 2015*

**Kinetic energy**

steel ball of mass 0.310 kg is fastened to a cord that is 86.0 cm long and fixed at the far end. The ball is then released when the cord is horizontal, as shown in the figure. At the bottom of its path, the ball strikes a 3.10 kg steel block initially at rest on a ...
*April 26, 2015*

**Calculus**

Find the area bounded by y=x^2-4x+3 and y=x+4 to the newrest integer.
*April 26, 2015*

**Physics**

skeet
*April 25, 2015*

**Physics**

In an empty rubber raft the pressure is approximately constant. You push on a large air pump that pushes 1.0 L(1.0× 10^−3m3) of air into the raft. You exert a 17N force while pushing the pump handle 3.0×10^−2m . Determine the work done on the gas. If ...
*April 25, 2015*

**Calculus**

Negative infinity? Or 27/2?
*April 25, 2015*

**Calculus**

Given f(x)=x^2-27x-28, find the largest integer in shich f is decreasing.
*April 25, 2015*

**Chemistry 2**

For the gaseous reaction of carbon monoxide and chlorine to form phosgene, (COCl2), calculate each of the following. (a) Calculate S° at 298 K I got -136.76 J/K using delta S = sum of delta S of products minus sum of delta S of reactants which is the right answer. But I ...
*April 25, 2015*

**math**

^ that should make sense . its a 3X3 matrix multiplied by a 3X1 matrix of x1,x2,x3
*April 25, 2015*

**math**

Can someone please explain this problem Find the general solution to the linear system of differential equations. x'1 x'2 x'3 = −4 −4 5 0 −4 4 0 4 2 x1 x2 x3
*April 25, 2015*

**science**

Yay! Thanks!
*April 25, 2015*

**science**

3,4&13. Thanks!! Plus I put this *** next to my answers!
*April 25, 2015*

**science**

someone plzzzzzzzzzzz help!!!!!!!!!!!
*April 25, 2015*

**science**

Can some one plz check this? It has been an hour!
*April 25, 2015*

**science**

1.Which of the following could be true of two different species that have a competitive relationship in the same ecosystem? A.One species preys on the other. B.The relationship is mutually beneficial. C.They share the same niche. D.One species benefits, while the other is ...
*April 25, 2015*

**government LSN**

what is the difference between urban sprawl and smart growth?? i don't really understand the definitions online and local government agency that decides how a piece of land is developed is zoning board right??
*April 25, 2015*

**government LSN**

smart growth does a better job at protecting the environment right
*April 25, 2015*

**government LSN**

what is the difference between urban sprawl and smart growth??
*April 25, 2015*

**government LSN**

name of local government agency that decides how a piece of land will be developed is it zoning board??
*April 25, 2015*

**government LSN**

also why do politicians need to regularly view public opinion polls
*April 25, 2015*

**government LSN**

thank you
*April 25, 2015*

**government LSN**

how do politicians and interest groups use the media to persuade Americans
*April 25, 2015*

**government **

what do candidates do in an electoral campaign
*April 25, 2015*

**government**

why do candidates need this item??
*April 25, 2015*

**Science-Physics**

Velocity = gravity x time velocity = 4.3 m/s gravity (constant) = 9.8 m/s/s 4.3 = 9.8 x time 4.3 / 9.8 = 9.8 x time / 9.8 4.3 / 9.8 = time .439 = time
*April 25, 2015*

**Physics**

The temperature of a 1 m long aluminum rod is 20° C. If the temperature is increased to 70° C, what is the length of the rod? The coefficient of linear expansion for aluminum is 16 * 10^-6 /(degrees)C Please help I can not get this.
*April 25, 2015*

**phyiscs**

Consider a hypothetical situation, where your friend suggests leaving the refrigerator door open to help cool the house on a hot summer day. Discuss what will happen to the temperature of the room. Will it decrease, increase, or stay the same and why
*April 25, 2015*

**Economics**

17. The current price for a good is $20, and 100 units are demanded at that price. The price elasticity of demand for the good is -1. When the price of the good drops by 10% to $18, consumer surplus: Increases or decreases by $__?
*April 25, 2015*

**Economics**

balls
*April 25, 2015*

**Public Speaking**

A
*April 25, 2015*

**Physics**

A car drives at a speed of 28m/s along a road parallel to a railroad track. A train traveling at 15m/s sounds a horn that vibrates at 300 Hz. If the train and car are moving toward each other, what frequency of sound is heard by a person in the car? If the train and car are ...
*April 25, 2015*

**Math**

1. cos theta = 0.2 for 270 degrees <= theta <= 360 degrees. Ans: 78.5 degs? 2. sin theta = 0.95 for -90 degrees <= theta <= 90 degrees. Ans: 71.8 degs?
*April 25, 2015*

**Physics**

Determine the first three standing wave frequencies of a 25.0-cm-long open pipe. Assume the speed of sound in air is 340 m/s. Do the same for a 25.0-cm-long closed pipe.
*April 24, 2015*

**Physics**

360 W
*April 24, 2015*

**Physics**

You are training for a marathon. While training, you lose energy by evaporation at a rate of 360. How much water mass do you lose while running for 3.0 h?
*April 24, 2015*

**Math**

. If Kerry fills the tank with 10 in. of water, how much water is in the tank? How much of the tank is empty?
*April 24, 2015*

**Psychology**

HELP !!! Which statistics concept is described? Choose from these answers: [(A):statistical test] [(B):Null Hypothesis] [(C):alpha] [(D):one-tailed test] [(E):two-tailed test] [(F):Type I error] [(G):Type II error] [(H):the statistic Z] 1)When a hypothesis is that two groups ...
*April 24, 2015*

**MATH**

HELP !!! Which statistics concept is described? Choose from these answers: [(A):statistical test] [(B):Null Hypothesis] [(C):alpha] [(D):one-tailed test] [(E):two-tailed test] [(F):Type I error] [(G):Type II error] [(H):the statistic Z] 1)When a hypothesis is that two groups ...
*April 24, 2015*

**Math, Psychology**

Thank You. Ms. Sue
*April 24, 2015*

**Math, Psychology**

Part 1 should be Central Limit Theorem? Ms. Sue
*April 24, 2015*

**Math, Psychology**

Can anyone tell me what should be the answer to this question? What term is being described: Choose from these answers: (A)Central Limit Theorem (B)Normal distribution (C)Standard Error (D)Z-score (E)Transformation rules 1) If you keep taking more and more samples, the average...
*April 24, 2015*

**MATH**

I did not understand that answer. Ms. Sue
*April 24, 2015*

**MATH**

Can anyone help me with this question.? What term is being described? Choose from these answers: (A)Central Limit Theorem (B)Normal distribution (C)Standard Error (D)Z-score (E)Transformation rules 1 If you keep taking more and more samples, the average of the samples' ...
*April 24, 2015*

**Math**

Whats for the part 2? bobpursley
*April 24, 2015*