Sunday

September 25, 2016
Total # Posts: 362

**chemistry**

Find the molar solubility of BaCrO4 (Ksp= 2.1 × 10−10) in 3.5 × 10−3 M Na2CrO4

*June 23, 2016*

**Physics **

Two positive charged spheres, one with 2 times the charge of the other are 38 cm apart. The net force between them is 0.77 N. What is the charge on the lesser charged sphere?

*May 25, 2016*

**Math **

The ratio of the length of a rectangle to the width of a rectangle is 5:2 if the link is 45 centimeters what is the width of the rectangle in centimeters

*May 17, 2016*

**Spanish**

THANK YOU!!! XD

*April 26, 2016*

**Spanish**

PLEASE HELP!! I'm confused because I know that the conjugated form for "yo" is digo, but I think it might be decir also because its translated as I have to tell the truth, and decir means "to tell." Yo tengo que _______ la verdad. decir dicen decimos ...

*April 26, 2016*

**Geometry (PLEASE HELP!!!)**

Please Please HELP!!!! I need the answer to this and i've worked it out but I don't know if it is correct... Please check my answer!!!! The polygons are regular polygons. Find the area of the shaded region to the nearest tenth. I can't post a picture of it but it ...

*April 14, 2016*

**Geometry**

Please Please HELP!!!! I need the answer to this and i've worked it out but I don't know if it is correct... Please check my answer!!!! The polygons are regular polygons. Find the area of the shaded region to the nearest tenth. I can't post a picture of it but it ...

*April 14, 2016*

**Physical Science**

Please check my answer!! I would be great if you could explain this to me a little as well... To find the amplitude, measure_____ a. the horizontal distance between consecutive positions b. the horizontal distance between a consecutive crest and trough c. vertical distance ...

*April 8, 2016*

**English**

Please help me with these question about Romeo and Juliet!!! They really are confusing me!! 1. In act 4 scene 1 of Romeo and Juliet, Paris tells Friar Laurence, "Immoderately she weeps for Tybalt's death, / and therefore have I little talked of love." What makes ...

*April 7, 2016*

**Trigonometry**

Ohhh I think I understand!! So that means that the answer would be 0, since no triangle is possible?? Thank you so much for explaining this to me!!

*March 30, 2016*

**Trigonometry**

PLEASE HELP!! I really don't understand this...I just started learning about trigonometry and SOH CAH TOA and I think this probably has to do with that but I don't know how to apply it... Please explain this to me!!!! I need to know how to do it and not just the answer...

*March 30, 2016*

**English**

Would number 6 be he is exiled to Mantua?? Because he was never exiled to Verona.

*March 17, 2016*

**English**

PLEASE HELP!!! Please check my answers!! I'm not sure about a few of them, but i marked the answers that I think are correct. 1. In Act IV of Romeo and Juliet, what is Friar Lawrence’s advice to Juliet concerning her parents’ wishes that she marry Paris? He tells...

*March 17, 2016*

**English**

Thank you sooo much!!!! :)

*March 15, 2016*

**English**

Also number 3 would that be destruction?? I don't really understand this question...

*March 15, 2016*

**English**

Fickle means changing frequently, and I thought that it was the correct answer because the Nurse's attitude toward Romeo and Juliet's relationship does change throughout the book.... Am i wrong??

*March 15, 2016*

**English**

Sorry i forgot to write my answer for number 2, i think its *dialogue* but I'm not sure...

*March 15, 2016*

**English**

PLEASE HELP!!! I'm really confused about these question from Romeo and Juliet... I marked the answers that I "think" are right but I'm not sure. Please tell me which ones i got wrong and the correct answer!?!?! 1. Why doesn’t Juliet want to marry Paris? ...

*March 15, 2016*

**Math**

A girl stands 7 meters away from a building. The angle of elevation from where she stands is 25 degrees. How tall is the Building?

*March 6, 2016*

**Physics**

PLEASE someone help!!!

*February 29, 2016*

**Physics**

Please check my answers!! 1. A 75 kg. man steps off the end of a diving board, and hits the water at 7.7 m/s. Ignoring air resistance, what was the mans PE (potential energy) right before he stepped off the diving board? I got 2223.375 Joules after Damon helped me...am I right...

*February 29, 2016*

**Physics**

Soo then the PE before he jumps off the diving board is 2223.375 Joules?? And the height of the diving board is 29.645 meter??

*February 29, 2016*

**Physics**

Sorry I had something to do! Thank you for explaining it!! Let me just see if i understand it completely...

*February 29, 2016*

**Physics**

Please help me with this!! I am really confused about it... 1. A 75 kg. man steps off the end of a diving board, and hits the water at 7.7 m/s. Ignoring air resistance, what was the mans PE (potential energy) right before he stepped off the diving board? *I know that the ...

*February 29, 2016*

**economics**

It is B and I am absolutely sure!

*February 18, 2016*

**economics**

I'm doing just that, thanks.

*February 18, 2016*

**economics**

In my textbook it gives these examples: YES-Money paid by shoppers in New York for corn grown in Iowa YES-Money paid by buyers in Indiana for cars made by a Japanese company at a factory in Kentucky YES-Fees charged to patients by a dentist in Texas NO-Money paid by a computer...

*February 18, 2016*

**economics**

oh darn I meant A

*February 18, 2016*

**economics**

Which goods would be included in the calculation of GDP? A. toys made in China at a factory owned by a U.S. company B. cars made in Tennessee at a factory owned by a Japanese car company C. plastic made in Kentucky and sold to a toy maker in Ohio D. cotton cloth made in India ...

*February 18, 2016*

**Math**

Thank you so much Ms. Sue

*February 17, 2016*

**Math**

So we divide 4 divide 7/8 ? Sorry

*February 17, 2016*

**Math**

Lucy spends 4 hours a week babysitting.Her Sister Lily spends 7/8 as much time babysitting. Does Lily babysit for more or less than 4 hours? 7/8•4= 20/32 But then how do I break that down ?

*February 17, 2016*

**English 9**

Please give me some advice!!!! Compare and contrast the poem "Mexicans Begin Jogging" to the story "Delfino II: Diez in the Desert". Both are written about similar themes, immigration, but the story has a more serious mood than the poem. ******** Both focus...

*January 19, 2016*

**English grammar.**

Thank you!! Yayay!

*January 14, 2016*

**English grammar.**

Please check my answer! What is the capitalized phrase? TO SCORE ACCURATELY, bowlers must learn what the terms spare, strike, and split mean. Infinitive phrase**** Gerund phrase Adverb phrase none of the above I though that the capitalized phrase was an infinitive phrase.

*January 14, 2016*

**Geometry**

I don't understand how this problem can have three different answers. These were the answers i go and i don't see anything else that could relate any of the angles together. So would all of them be correct or just one??

*December 8, 2015*

**Social Studies**

Which of these factors MOST shaped American identity? A: The United States is located in North America. B: Aristocratic royal governors oversaw the earliest British colonies. C: Early colonists grew cash crops and replied on natural resources to survive. D: The Pilgrims came ...

*November 10, 2015*

**Chemistry**

A solution is prepared by dissolving 0.1 mol of ethanoic acid (CH3COOH) in 500ml of water at 25 C. pKa of ethanoic acid is 4.7. What is the pH of the solution? I'm assuming the equation is pH = pKa + log[Base]/[Acid] but can't get it to work?

*October 21, 2015*

**Math**

1,337,676 , simple

*August 31, 2015*

**math-Urgent help please.**

-42

*August 31, 2015*

**Statistics**

How do you find the p-value??? Thanks! In the past, 35% of the students at ABC University were in the Business College, 35% of the students were in the Liberal Arts College, and 30% of the students were in the Education College. To see whether or not the proportions have ...

*June 19, 2015*

**Chem**

You made 100.0 mL of a lead(II) nitrate solution for lab but forgot to cap it. The next lab session you noticed that there was only 80.7 mL left (the rest had evaporated). In addition, you forgot the initial concentration of the solution. You decide to take 2.00 mL of the ...

*April 19, 2015*

**Inorganic chem**

What mass of baking soda (NaHCO3) would be required to neutralize 10.00mL of 12.1M muriatic acid remaining in a empty water bottle?

*April 16, 2015*

**math**

The ratio of the length of a rectangle to the weight of the rectangle is 5:2 if the link is 45 centimeters what is the width of the rectangle in centimeters

*February 11, 2015*

**Chemistry**

39,26,52

*January 19, 2015*

**Chemistry**

For another picnic, you want to make hamburgers with pickles, again without having any left over. You need to balance the number of packages of buns (which usually contain 8 buns) with the number of packages of hamburger patties (which usually contain 12 patties) and the ...

*January 19, 2015*

**algebra 1**

A town is organizing a parade. There will be floats of only 2 sizes, 30ft. and 15ft. A space of 10 ft. will be left after each float. a. the parade must be at least 150 feet long, but less than 200ft long. what is the combinations of large and small floats are possible? b. ...

*January 9, 2015*

**algebra 1**

You have $100 to go shopping. A store sells shirts for $15 and dress shirts for $22. You want to spend no more then the amount of money you have. You want to leave at most $10 unspent. you need to buy at least one dress shirt. What are all the possible combinations of t shirts...

*January 9, 2015*

**Multiplying Polynomials**

Use the distributive property to write (each of) the following expression(s) as the sum of monomials. M. (t - 1)(t + 1)(t^2 + 1) I already know that I must multiply across, but I am a bit confused regarding the order to multiply in and which variables to "distribute"...

*January 9, 2015*

**Physics**

As part of a safety investigation, two 1200kg cars traveling at 24m/s are crashed into different barriers. Find the average force exerted on the car that hits a concrete barrier and takes 0.16s to stop.

*December 7, 2014*

**Math**

Seth had a bag with 4 green, 5 yellow, and 6 blue marbles in it. If Seth draws a yellow marble and does not replace it, what is the probability that the second marble he draws is yellow?

*November 5, 2014*

**Math**

My locker combination has three digits. None of the digits are 0. What is the probability that the first digit of my locker combination is less than 3?

*November 5, 2014*

**Algebra **

What are two numbers that add to 615 but multiply to -90000? I'm trying to factor the quadratic x^2+615x-90000

*October 23, 2014*

**Physics **

An artillery shell is fired at an angle of 67.4◦ above the horizontal ground with an initial speed of 1560 m/s. The acceleration of gravity is 9.8 m/s2 . Find the total time of flight of the shell, neglecting air resistance. Find its horizontal range, neglecting air ...

*October 23, 2014*

**physics**

98. On which of these hills does the ball roll down with increasing speed and decreasing acceleration along the path? (Use this example if you wish to explain to someone the difference between speed and acceleration.) 99. If you drop an object, its acceleration toward the ...

*June 11, 2014*

**Math**

@rainbowunipenguin

*May 6, 2014*

**Math**

If Jeremy has 17 chocolate bars and he give 3 to Lucy and gets 5 from Bruno, how many chocolate bars does Jeremy have now? All of my friends say "diabetes" but I have repeatedly told them that diabetes is not a number but they stick with it. I believe that Jeremy has...

*April 27, 2014*

**algebra**

Determine the value of each expression 25% of 200

*April 3, 2014*

**English**

How could you use the words feel and turn as a linking verb?

*January 14, 2014*

**5th grade math help**

make the mixed number an IMPROPER FRACTION,and multiply using 2/3 reciprocal being 3/2 multiply simplify see if you can simplify again

*January 13, 2014*

**physics**

A vertical scale on a spring balance reads from 0 to 220N . The scale has a length of 15.0cm from the 0 to 220N reading. A fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.45Hz . Part A Ignoring the mass of the spring, what is the mass m of ...

*December 10, 2013*

**Physics**

The equation of motion for an oscillator in vertical SHM is given by y=(0.60m)sin[(130rad/s)t]. Part A What is the amplitude of this motion? Part B What is the frequency of this motion? Part C What is the period of this motion?

*December 10, 2013*

**Materials Transport**

You have a kiln where theinterior is a cube with an edge length of 30 cm. The walls of the kiln are made of an insulating refactory, and are 10 cm thick. The thermal conductivity of the refractory is .06 W/mK. The interior of the kiln is at a temperature of 1250 degrees C, and...

*November 26, 2013*

**Statistics**

of 500 randomly selected people in new york city, 210 people had O+ blood. a) "42 percent of the people in NYC have O+ blood" Is the statement descriptive statistics or inferential statistics?

*November 15, 2013*

**physics**

A 72.5 kg skier is going straight down a 31.1o slope. Each ski has a contact area with the snow of 0.137 m2. Calculate the pressure that the snow exerts on each ski.

*November 12, 2013*

**College anatomy**

It was observed that blood glucose levels were falling in an individual. This event would be sensed by (a) cells in the (b) of the pancreas, causing them to release the hormone (c). This series of events would be part of an (d) loop/mechanism, serving as a self-adjusting ...

*November 11, 2013*

**chemistry **

Calculate the partial pressure of propane in a mixture that contains equal numbers of moles of propane (C3H8) and butane (C4H10) at 20 °C and 616 mmHg. (R=0.082 L-atm/K mol)

*November 10, 2013*

**chemistry **

Calculate the partial pressure of propane in a mixture that contains equal numbers of moles of propane (C3H8) and butane (C4H10) at 20 °C and 616 mmHg. (R=0.082 L-atm/K mol)

*November 10, 2013*

**chemistry **

Calculate the partial pressure of propane in a mixture that contains equal numbers of moles of propane (C3H8) and butane (C4H10) at 20 °C and 616 mmHg. (R=0.082 L-atm/K mol)

*November 10, 2013*

**physics**

A merry-go-round makes 23 revolutions in a 2.8min ride. Part A What is its average angular speed in rad/s?

*November 5, 2013*

**physics**

The driver of a car sets the cruise control and ties the steering wheel so that the car travels at a uniform speed of 14m/s in a circle with a diameter of 100m . Part A Through what angular distance does the car move in 4.00min ?

*November 5, 2013*

**physics**

A baseball player pops a pitch straight up. The ball (mass 230g ) was traveling horizontally at 36.0m/s just before contact with the bat, and 21.0m/s just after contact. Part A Determine the magnitude of the impulse delivered to the ball by the bat. Part B Determine the ...

*October 29, 2013*

**physics**

How much power must you exert to horizontally drag a 21.0kg table 15.0m across a brick floor in 20.0s at constant velocity, assuming the coefficient of kinetic friction between the table and floor is 0.500?

*October 24, 2013*

**physics**

The acceleration due to the moon's gravity at its surface is less than what it is here on the surface of the earth. The computed value of 1.6 m/s2 is consistent with what the Apollo Program astronauts observed during their explorations there. Imagine an astronaut holding a...

*October 2, 2013*

**Stats**

For X ∼ Poi(λ), show that E(X) = λ and V ar(X) = λ. (Hint: Find E[X(X − 1)] = E(X2 ) − E(X).)

*September 30, 2013*

**Stats**

The Geometric distribution is used when we want to ﬁnd the probability of performing a sequence of trials with X “failures” before the ﬁrst “success”, where a “success” occurs with some probability p. We can denote such a random ...

*September 30, 2013*

**human resources**

What is the difference between executive pay and non executive pay and controversies are associated with the disparity between them?

*August 3, 2013*

**math**

can anyone try this one

*May 4, 2013*

**math **

Find the area of the segment of the circle. Leave your answer in terms of pi. there is a circle with a shaded area that has a 90 degree triangle in it and a 3 next to one soide of the triangle

*May 4, 2013*

**social studies**

thank you so much but i found the answer

*April 21, 2013*

**social studies**

Why did pilgrims travel? a. to fight a holy war b. to organize followers c.to pay tribute to a king d. to visit holy places

*April 21, 2013*

**Calculus please help !**

Find the coordinates of the center of the ellipse represented by 4x^2 + 9y^2 – 18y – 27 = 0. For 2x^2 + xy + 2y^2 = 1, find , the angle of rotation about the origin, to the nearest degree. Find the distance between points at (–1, 6) and (5, –2). Identify ...

*April 12, 2013*

**Pre-calculus HELP PLEASE !**

(2/9, -1 2/4) ? d=10 ellipse ?

*April 12, 2013*

**Pre-calculus HELP PLEASE !**

Find the coordinates of the center of the ellipse represented by 4x^2 + 9y^2 – 18y – 27 = 0. For 2x^2 + xy + 2y^2 = 1, find , the angle of rotation about the origin, to the nearest degree. Find the distance between points at (–1, 6) and (5, –2). Identify ...

*April 12, 2013*

**Algebra**

Two questions I need help with. Find the indicated partial sum using the information given. 1. a3=4/9, a7=9/64, S6 Determine wheater the infinite geometric series has a finite sum 2. 6+ 3+ 3/2 + 3/4 +.... 3. -49 + (-7) + (- 1/7) +...

*April 8, 2013*

**Help! Algebra **

Find the common ratio r and the value of A1 with the information given. 1. A3=324 A7=64 2. A4=32/3 A8=54

*April 8, 2013*

**Math**

If the floor plan of a new building is shown the building cost $35.00 a saqure foot to construct you need to obtain insurance for the new building .how much insure?

*April 5, 2013*

** Reiny please help!Algebra **

I need help with these! I got B for 1. C for 2. and D for 3. Thanks for the help! 1.) Find the values of a, b, and c that will make the statement true. [5 a -2] [5 102] [3 4 –b] = [-3 -4 3] [2c 5 9] [-2 5 9] a.) 8R1-R2--> =R2 b.) -8R1-R2 -> =R2 c.) –8R1 +R2 -&...

*March 28, 2013*

**Algebra multiple choice! **

I have a few questions I need help with! Please explain if my answer was not right how you got to it. I got 1.) B 2.) A 3.) C 1. Solve the system by triangularizing the augmented matrix and using back substitution. If the system is linearly dependent, give the solution in ...

*March 28, 2013*

**Algebra help!**

1.) Solve the system by triangularizing the augmented matrix and using back substitution. -x-y+z=1 x-y-4z=-7 4x+y+z=6 2.) Perform the indicated row operation, then write the new matrix. -4 4 | 4 9 -6 | 5 -2R1+ R2 ---> R2 3.) Solve the system by triangularizing the augmented...

*March 28, 2013*

**Pre-calculus; urgent ! Please help !**

1.Graph the polar equation r=3-2sin(theta) 2. Find the polar coordinates of 6 radical 3,6 for r > 0. 3. Find the rectangular coordinates of (7, 30°). 4. Write the rectangular equation in polar form. (x – 4)2 + y2 = 16 5. Write the equation –2x + 6y = 7 in ...

*February 26, 2013*

**Calculus please help !**

1.Graph the polar equation r=3-2sin(theta) 2. Find the polar coordinates of 6 radical 3,6 for r > 0. 3. Find the rectangular coordinates of (7, 30°). 4. Write the rectangular equation in polar form. (x – 4)2 + y2 = 16 5. Write the equation –2x + 6y = 7 in ...

*February 26, 2013*

**Math ! Please Help !**

1.Graph the polar equation r=3-2sin(theta) 2. Find the polar coordinates of 6 radical 3,6 for r > 0. 3. Find the rectangular coordinates of (7, 30°). 4. Write the rectangular equation in polar form. (x – 4)2 + y2 = 16 5. Write the equation –2x + 6y = 7 in ...

*February 26, 2013*

**Thermodynamics**

The initial state consists of a closed system containing one mole of super-heated liquid water at 115°C and 1 atmosphere pressure. The immediate surroundings are also at 115°C and 1 atmosphere pressure. The change in state is described as this one mole of super-heated ...

*February 23, 2013*

**Calculus please help !**

Find the inner product of a and b if a= (3, 0, –1) and b= (4, –2, 5), and state whether the vectors are perpendicular.

*February 20, 2013*

**Math ! Please Help !**

Find the inner product of a and b if a= (3, 0, –1) and b= (4, –2, 5), and state whether the vectors are perpendicular.

*February 20, 2013*

**Pre-calculus; urgent ! Please help !**

Find the inner product of a and b if a= (3, 0, –1) and b= (4, –2, 5), and state whether the vectors are perpendicular.

*February 20, 2013*

**Math**

1. A triangular prism has vertices at A(2, 0, 0), B(2, 1, 3), C(2, 2, 0), D(0, 0, 0), E(0, 1, 3), and F(0, 2, 0). Which image point has the coordinates (1, 4, 3) after a translation using the vector 1, 2, 3? 2. What point represents a reflection of B over the xy-plane? B'...

*February 20, 2013*

**Calculus**

oh my goodness, that was so helpful! Thankyou :) i think i got them all!

*February 20, 2013*

**Calculus**

1. A triangular prism has vertices at A(2, 0, 0), B(2, 1, 3), C(2, 2, 0), D(0, 0, 0), E(0, 1, 3), and F(0, 2, 0). Which image point has the coordinates (1, 4, 3) after a translation using the vector 1, 2, 3? 2. What point represents a reflection of B over the xy-plane? B'...

*February 20, 2013*