# Posts by anna

Total # Posts: 2,657

**english**

stupid Reed

*October 15, 2015*

**stoichiometry**

An ore contains Fe3O4 and no other iron.The iron in a 39.5-gram sample of the ore is all converted by a series of chemical reactions to Fe2O3. The mass of Fe2O3 is measured to be 26.7 g. What was the mass of Fe3O4 in the sample of ore? Answer in units of g.

*October 15, 2015*

**STATISTICS**

actually for part e I think it may be 0.8

*October 9, 2015*

**STATISTICS**

A salesperson contacts eight potential customers per day. From past experience, we know that the probability of a potential customer making a purchase is .05. b.) What is the probability the salesperson will make exactly two sales in a day? this is what I think the answer is 0...

*October 9, 2015*

**Social Studies**

100% Thanks. I thought 3 was D, too.

*October 7, 2015*

**Math**

Draw two number lines that show 0.20 and 1/5 are equivalent

*October 6, 2015*

**maths**

Anna picked 6 cards from these 10 digit cards to form a 6-digit number: 0 1 2 3 4 5 6 7 8 9, then asked Ola to guess what number she made. 1.Only the first digit is an odd number.2.The digit in the ten thousands place is twice the digit in the ones place.3.The number is 800 ...

*October 6, 2015*

**Pre-Cal**

A drone 125 ft high sights a landing pad with an angle of depression of 15 degrees. what is the horizontal distance between the drone and the landing pad? I tried all the methods set it up multiple ways, and I'm at a loss. My teacher said the answer is 466.5ft.. but how? ...

*October 5, 2015*

**science**

B A B A D assured 100% :) :3

*September 30, 2015*

**Physics**

A skier speeds down a smooth ski slope which is at an angle of θ = 21° with the horizontal. The mass of the skier is 75 kg. Take the downhill direction to be positive and uphill to be negative. What is the net force acting on the skier? Ok, so I have set up these ...

*September 28, 2015*

**2nd Law Physics**

You fashion a sling shot with a rather long and wide rubber band and practice hurling pebbles. You pull back on the center of the band with a force of 2.31 N. The angle between the two halves is 107°. What is the tension in the band? I get the gist of setting up Newton'...

*September 28, 2015*

**Science**

The answer is spores. Seeds is the main differ you idiot.

*September 28, 2015*

**Math**

Gisela has 135 cds 11 are pop music she has 3 times as many rocks cds as she had classical how many rocks cds does she have?

*September 27, 2015*

**chemistry (Physchem)**

Calculate the standard heat of reaction at 250C (298K) and 1 atm pressure of 3FeO(s) + 2Al(s) → Al2O3(s) + 3Fe(s) in terms of per mole of Al2O3 formed, per mole of Fe formed, per mole of FeO reacted, per mole of Al reacted and per g of Fe formed. ΔH298K,FeO(s) = -63...

*September 27, 2015*

**Physics**

A mover has to move a heavy sofa of mass 146 kg to the second floor of the house. He uses a rope to pull the sofa up a ramp from the first to the second floor. As he pulls the sofa he makes sure that the rope is parallel to the surface of the ramp which is at 30.0° to the ...

*September 27, 2015*

**social studies**

No mam I do understand a little bit of it but i do not get all of it so it confuses me a lot

*September 24, 2015*

**Math**

The next palindrome is 27072. So 27072-26962 = 110 So 110km/2h So 55km/h

*September 23, 2015*

**math**

What is the commission on a sale total of $300,000 if you keep 8%? help!

*September 23, 2015*

**Social Studies**

1. D 2. B 3. A 4. D 100% Guaranteed ;)

*September 22, 2015*

**Math**

The fence in David's backyard is 14 feet 5 inches long how many total inches is that

*September 20, 2015*

**Career**

It's A

*September 16, 2015*

**Chemistry college**

You are given a recipe for a buffer that contains 5% (w/v) MgSO4.7H2O. However, you only have MgSO4 anhydrous available to you. How much MgSO4 anhydrous do you need to make 0.5L of the buffer with the same molar concentration as in the recipe? Show your calculations

*September 16, 2015*

**physics**

A 10.0 microCoulomb point charge is fixed in place at the origin. A 2.00-microCoulomb point charge is released from rest at x = 0.500 m. Because of the repulsive force between the two point charges, the 2.00-microCoulomb charge is accelerated in the +x direction. What is the ...

*September 15, 2015*

**chemistry**

Hi! Can you please check if my answers are correct? And, can you please tell me any other details you think are important to add. Also, the last two questions i have no clue how to answer. can you help? thanks so much! 3.A burning candle produces a luminous flame. What is the ...

*September 11, 2015*

**chem**

If you have a properly adjusted hot flame, which is pale blue with three distinct cones, what is observed if the gas control valve is slightly closed? Explain.

*September 11, 2015*

**Math**

by 3 pm the temperature had increased by another 5 degrees. was the temperature at 3pm positive or negative

*September 9, 2015*

**Chemistry**

I'm having trouble turning mM to mOsmoles. The equation goes like this: red blood cell are placed into a beaker filled with .5L of a 150mM NACL solution. NACL is non-penetrating solute and will not cross the red blood cell membrane. I have 150mM/0.5L * 2mOsM/100mM But ...

*September 8, 2015*

**math**

4 red and 16 green the question refers to green not red

*September 1, 2015*

**Language Arts**

1. B 2. A 3. C I just took the test, these answers are correct 100%

*August 25, 2015*

**Math**

Hello every one its Anna:) I just wanted to say that Jesus loves you all no matter if you are big or small!

*August 19, 2015*

**Physics**

A constant force of friction of 50 N is acting on a body of mass 200kg moving initially with a speed of 15m/s. How long does the body take to stop? What distance will it cover before coming to rest?

*July 30, 2015*

**Geometry**

A square football field 3 mi. wide.

*July 29, 2015*

**Solving Geometry Formulas**

If the perimeter of a rectangle is 48 ft. and the width is 9 ft., what is the length of the rectangle?

*July 29, 2015*

**Solving Geometry Formulas**

The perimeter of a rectangle is 56 meters. If the width of the rectangle is 7 meters, find the length.

*July 28, 2015*

**Intro to Algebra- Geometry**

2 cans will be needed.

*July 28, 2015*

**Intro to Algebra- Geometry**

A sail on a sailboat has a base of 10 ft. and a height of 18 ft. and needs to be sealed with water repellent. One can of water repellent will cover 50 sq. ft., how many cans will be needed to cover the sail?

*July 28, 2015*

**Intro to Algebra**

Sally is making a tablecloth and wants to put lace around the edges. How much lace will she need to purchase if the radius is 1.5 ft.

*July 28, 2015*

**Probability and statistics**

The hydrocarbon emissions at idling speed in parts of million (ppm) for automobiles of 1980 and 1990 model years are given for 20 randomly selected cars. 1980 models: 141 359 247 940 882 494 306 210 105 880 200 223 188 940 241 190 300 435 241 380. 1990 models: 140 160 20 20 ...

*July 20, 2015*

**english teachers?**

are there any english teachers on here at this time?

*July 17, 2015*

**Biology**

I have any idea for these.

*July 15, 2015*

**Biology**

1) Microscopic hairs of the windpipe are always __________. 2) The cilia of the windpipe move harmful substances __________. 3) You build a heavy gust of air when you __________ or __________. 4) Coughing and sneezing help push harmful substances from the __________.

*July 15, 2015*

**Biology**

1 hair 2 mucus 3 mucus

*July 15, 2015*

**English**

I am writing a 300 word short story(or a "'personal' narrative essay") for the prompt: lessons we learn affect one's future. So far I have a general idea: I want the lesson to be loyalty and truth and I want the effect to be that the character would learn...

*June 21, 2015*

**Physics**

So we did this lab about how we are to measure the half life of the beta decay of indium 116 (the indium 116 is captured by indium 115 and undergoes beta decay to become tin 116. Since the Indium 116 I reused I understand that every time we use it, the indium 116 becomes a ...

*June 17, 2015*

**Physics**

The Golden Gate Bridge in San Francisco has a main span of length 1.28 km, one of the longest in the world. Imagine that a steel wire with this length and a cross-sectional area of 4.00 x 10-6 m^2 is laid on the bridge deck with its ends attached to the towers of the bridge, ...

*June 15, 2015*

**Physics**

What is the significance in the observation of discrete spectral lines in the emission spectrum of hydrogen??

*June 15, 2015*

**Physics**

A converging lens has a virtual object located a finite distance away. Which of the following must be true? (Select all that apply.) a) f > q b) The image is virtual. c) p < 0 d) The image is real. e) p > 0 Hi, can someone explain which is correct or incorrect? Thank ...

*June 10, 2015*

**English**

I am just about the processes of writing a short story and I am looking for a word/phrase that can properly describe a departure, without a destination(I am not going to specify anything to reflect the tone and theme of my story) that is just taken based on whim and for self ...

*June 9, 2015*

**Physics**

A pair of speakers separated by distance d = 0.900 m are driven by the same oscillator at a frequency of 670 Hz. An observer originally positioned at one of the speakers begins to walk along a line perpendicular to the line joining the speakers as in the figure below. (a) How ...

*June 8, 2015*

**Physics**

A pair of speakers separated by distance d = 0.900 m are driven by the same oscillator at a frequency of 670 Hz. An observer originally positioned at one of the speakers begins to walk along a line perpendicular to the line joining the speakers as in the figure below. (a) How ...

*June 8, 2015*

**Physics**

I did a lab about Standing waves on a string and it asked me the following qeuestions: Discuss any errors arising from the method used to establish the standing wave pattern. - I think air resistance, linear density of string is non uniform, tension of the string is not ...

*June 5, 2015*

**Physics**

Suppose you have a string that is being made to vibrate at a specific frequency, f. The speed of waves on the string is v. The length of the string that is vibrating, L, is adjustable. When the length of the string has been adjusted so that the fundamental standing wave ...

*June 4, 2015*

**Physics**

thank you!

*June 4, 2015*

**Physics**

A stretched string is attached to an oscillator. On which of the following quantities does the wavelength of the waves on the string depend? Select all that apply. The choices are: A) The frequency of the oscillator. B) The tension applied to the string. C) The amplitude of ...

*June 4, 2015*

**Math**

Wait! Nevermind, figured it out! Use linear equation right?

*June 3, 2015*

**Math**

Which of the following equations gives the relationship between S and T in the table below? S 1 2 3 4 5 6 T 1 4 7 10 13 16 How do you find equations again?

*June 3, 2015*

**Math**

1. Cate went on a trip of 120 miles at x miles per hour. Returned over same route at 5miles/hour faster than previous rate.If time for return trip was one-third of an hour less than time for the outgoing trip,how do you find x? (Set up the chart right, and used the time column...

*June 3, 2015*

**Math**

PLease explain how to do this Add or Subtract (m^2-m+3)+(m-1)

*June 2, 2015*

**Math**

I brought a book and paid $1.80 in sales tax. If the tax was 8%, what was the cost of the book. How do I solve this problem?

*May 25, 2015*

**Language Arts**

Each day, Wyatt created both humorous and touching poetry in his attic room. his attic room both humorous and touching poetry Each day in his attic room

*May 23, 2015*

**ss**

That link didn't help at all. If you could, every once in awhile, JUST GIVE A BALLPARK FIGURE, and stop sending stupid links.

*May 13, 2015*

**LA the giver chapters 1-2**

just to make it easier, all of the answers are: 1. b, d 2. c 3. b 4. d

*May 13, 2015*

**english**

Please place all of the chairs in the middle of the room.

*May 11, 2015*

**math**

Me is 100% correct. Thanks a bunch.

*May 6, 2015*

**Spanish**

Thank you so much Sra. You are always so kind to help.

*May 2, 2015*

**Spanish**

Sra. does this essay look ok? It is comparing the Hispanic views on death and the US view. Cultura hispana celebra la muerte de muchas maneras, mientras que la cultura americana creo que es demasiado triste para la vida diaria. La vida para los hispanos es difícil. La ...

*May 2, 2015*

**math**

yEAH, Student stop being a HATER

*April 28, 2015*

**Computer Architecture!!**

How can we find the value in decimal stored in the AC register, after executing the MARIE program

*April 24, 2015*

**Math**

Amy is 100% correct for Connections Academy students. =)

*April 24, 2015*

**Chemistry**

for anyone else needing this info it is b

*April 20, 2015*

**Chemistry**

so is it a b or c

*April 20, 2015*

**Chemistry**

then you must times it by two so it would be .0144

*April 20, 2015*

**Chemistry**

but that is wrong when entered into assignment, what else could it be

*April 20, 2015*

**SS**

Just because someone needs help with a question doesn't mean that they're cheating. If you have nothing nice to say, don't say shizznit at all!

*April 20, 2015*

**college algebra**

a chemist needs to prepare 28 ounces of a 8% hydrochloric acid solution. find the amount of 14% solution and the amount of 7% solution he should mix to get this solution.

*April 20, 2015*

**math word problem**

You are in a car. The car begins your journey by traveling 3 miles south in a straight path. The car then travels 9 miles east in a straight path and then turns and travels another 9 miles south in a straight path to end the journey. What is the straight-line distance between ...

*April 16, 2015*

**SOUTH CAROLINA STATE HISTORY**

9. Which event did NOT change the culture of the United States during the early 1920s? (1 point) a. bank failures that closed factories and decreased job opportunities b. installment plans used to purchase expensive consumer goods c. boll weevil infestations which changed ...

*April 15, 2015*

**Economic**

Suppose that Betsy’s utility function is given by the equation U=Y0.3 where Y is measured in thousands of dollars. Betsy’s current job pays her $20,000 per year and she can earn this amount next year with certainty. Betsy is offered a different job but in this new ...

*April 15, 2015*

**Pre Algebra Probability**

adolf hitler and you know he is gay, how? plus, whats wrong with that? compare being gay with murdering tons of innocent Jews? don't try taking a straw out of someone elses eye when you have a rafter in your own

*April 13, 2015*

**Physics**

You have 250 g of water in an aluminium calorimeter with a mass of 125 g. How long will it take to increase the temperature of the water and calorimeter from 20C to 37C if the system is heated by a resistive heating element with 8 V across the resistor and 0.75 A flowing ...

*April 12, 2015*

**English**

What are each of these are like: 1. Control 2. Conformity 3. Equality 4. Individualism

*April 12, 2015*

**Trigonometry (identities) (last help needed)**

I apologize; it is simplifying. The homework is for my identities unit, though. And number 1 does not have a typo. Sorry!

*April 9, 2015*

**Trigonometry (identities) (last help needed)**

1. (2cosx-2secx)(3cosx^2+3secx^2+β) 2. (16tanxsecx-4secx)/(8tanxsecx+4secx) 3.sinxcosx^3+cosx^4 (hint: GCF) 4. (cosβ+sinβ)^2

*April 9, 2015*

**Trigonometry (identities)**

I tried these but for 4 I seemed to get a reasonable answer: cos^2(β)-cot^2(β) How does that look? Please correct me if I'm wrong - it felt too simple.

*April 9, 2015*

**Trigonometry (identities)**

1. (-8cosxsinx+4cos2x)^2 +(4cosx^2+8sinxcosx)^2 2. cos(α-β)cosβ-sin(α-β)sinβ 3. 1+(sinx-cosx)(sinx+cosx) 4. (cosβ-cotβ)(cosβ+cotβ)

*April 9, 2015*

**Geometry**

Pyramid?

*April 8, 2015*

**Physics**

A parachutist drops out of a plane at an altitude of 150m and accidentally drops his camera. If the parachute opens the instant he drops out of the plane and he descents at a constant speed of 6 m/s, how much time separates the arrival of the camera on the ground from the ...

*April 5, 2015*

**Trigonometry (identities)**

Simplify: 1. sin(α+β)+sin(α-β) 2. (-8cosxsinx+4cos2x)^2 + (4cos^2x+8sinxcosx)^2 3. sqrt(sin^4xcosx) * sqrt(cos^3x)

*March 31, 2015*

**chemistry**

Answer is 40.1L. After conversions, plug it all into V=nRT/P

*March 31, 2015*

**chemistry**

Try PV=nRT, where R=0.08206, P=pressure, V=volume, n=moles, and T=temperature. Convert temperature to Kelvin, Torr to atm (pressure), and g to moles (divide by molar mass).

*March 31, 2015*

**Chemistry**

This sounds right to me! Next step to find kJ per gram, would be to convert your J to kJ, and divide by the amount of grams given. This is odd, however, since normally these problems want kJ per mole, not gram. I hope this helps!

*March 31, 2015*

**art**

Thanks "Sid.V" I couldn't figure out number 2

*March 31, 2015*

**chemistry**

Keep in mind: n=moles, so divide your grams by molar mass to get moles. Then, as said above, plug everything in. V=nRT/P

*March 30, 2015*

**Chemistry**

Set up: convert units --> PV=nRT --> PV/RT=n --> moles to molecules. (0.993atm*2.00L)/(0.08206*296.15K)=0.08176 mol N2 0.08176 mol*(6.022x10^23 molecules/1 mol)=4.92x10^22 molecules N2 Let me know if this helps!

*March 30, 2015*

**English**

B. It's for sure.

*March 27, 2015*

**math**

The area of a circle is given by the formula A = ðr2, where r is the radius. If increasing the radius of a circle by 1 inch gives the resulting circle an area of 100ð square inches, what is the radius of the original circle?

*March 26, 2015*

**History**

ohhhhh its C xD

*March 24, 2015*

**History**

so A :)

*March 24, 2015*

**History**

South Carolina .

*March 24, 2015*

**History**

Why did the popularity of the Grange decline? a.)Its leaders were weak and ineffective. b.) It became corrupt and lost the farmers' trust.**** c.) It did not address the farmers economic needs. d.) it was not able to obtain political power in the state

*March 24, 2015*