Saturday

October 10, 2015
Total # Posts: 350

**Statistics**

According to one survey, the mean serum cholesterol level for U.S. adults was 195.1, with a standard deviation of 41.5. A simple random sample of 95 adults is chosen. Find the 46 percentile for the sample mean. Write only a number as your answer. Round to one decimal places.
*October 6, 2015*

**Statistics**

Electricity bills in a certain city have mean $108.73. Assume the bills are normally distributed with standard deviation $10.60. A sample of 47 bills was selected for an audit. Find the 46 percentile for the sample mean. Write only a number as your answer. Round to two decimal...
*October 6, 2015*

**Statistics**

A survey among freshman at a certain university revealed that the number of hours spent studying the week before final exams was normally distributed with mean 25 and standard deviation 15. A sample of 36 students was selected. What is the probability that the average time ...
*October 6, 2015*

**Statistics**

The mean monthly rent for a one-bedroom apartment without a doorman in Manhattan is $2,651. Assume the standard deviation is $500. A real estate firm samples 100 apartments. What is the probability that the average rent of the sample is more than $2,708? write only a number as...
*October 6, 2015*

**Statistics**

Suppose that the weight of male babies less than 2 months old is normally distributed with mean 11.5 pounds and standard deviation 2.7 pounds. A sample of 36 babies is selected. What is the probability that the average weight of the sample is less than 11.07 pounds? Write only...
*October 6, 2015*

**Math**

thank you.
*October 3, 2015*

**Math**

Is b. 9.909 correct?
*October 3, 2015*

**Math**

I need help with this problem: Circle the number closest in value to 10.1 a. 9.9 b. 9.909 c. 10.99 d. 10.5
*October 3, 2015*

**Algebra 2**

Can someone please help me solve this rational expression?
*September 12, 2015*

**Algebra 1**

A teacher buys 50 train tickets for a school trip for a total cost of $1,200. She buys x number of student tickets for $20 each. She also buys y number of adult tickets for $30 each.
*August 26, 2015*

**Physics**

What is the tension in the string in (Figure 1) ? The volume of plastic ball is 95 cm3 and the density is 840 kg/m3.
*July 26, 2015*

**Physics**

The two ropes shown in the bird's-eye view of (Figure 1) are used to drag a crate 3.7 m across the floor. How much work is done by the force fk→? How much work is done by the force T1→? How much work is done by the force T2→?
*July 22, 2015*

**Physics**

A mineshaft has an elevator hung from a single steel-wire cable of diameter 2.5 cm. Young's modulus of the cable is 10×1010N/m2. When the cable is fully extended, the end of the cable is 500 m below the support. How much does the fully extended cable stretch when ...
*July 15, 2015*

**Algebra 2**

Can someone check my work please? I tried my best on all the problems but I still don't understand excluded values and how to simplify rational expressions. Thank you in advance for any help! 1)6x^5/2x^3 6/2 = 3 3x^5/x^3 x^5-x^3 = x^2 3x^2/1 2) (2x+4)+(x^2 +2x) 2x+4: 2(x+2...
*July 9, 2015*

**Physics**

A sprinkler mounted on the ground sends out a jet of water at a 35∘ angle to the horizontal. The water leaves the nozzle at a speed of 15m/s . How far does the water travel before it hits the ground?
*June 17, 2015*

**physics**

A car moves with constant velocity along a straight road. Its position is x1 = 0 m at t1 = 0 s and is x2 = 48m at t2 = 5.0s . Answer the following by considering ratios, without computing the car's velocity. What is the car's position at t = 2.5s ? What will be its ...
*June 12, 2015*

**Physics**

In a 5.00km race, one runner runs at a steady 11.6km/h and another runs at 15.0km/h. How long does the faster runner have to wait at the finish line to see the slower runner cross?
*June 12, 2015*

**Algebra 2**

Yes, sorry I meant evaluate. But the equation is not √2/(2+√2). The equation is √2/2 + √2
*May 20, 2015*

**Algebra 2**

I have tried solving this problem over and over but I'm still not sure with my answer. The question is sqrt2 / 2 + sqrt2. I think the answer is 1/sqrt2 + sqrt2 because you have to cancel out the common factors.
*May 20, 2015*

**physics**

a 16.0-g bullet is shot into a wooden block at rest with mass 4550g on a frictionless surface. the block moves 1.20m/s after the bullet strikes and becomes lodged in the block. find the speed of the bullet before striking the block.
*April 7, 2015*

**physics**

one car of mass 15.0kg is moving 5.00m/s to the right on a frictionless track and collides with a cart of mass 3.00kg. the final velocity of the carts that become stuck together after the collision is 1.50m/s to the right. find the velocity of the second cart before the ...
*April 7, 2015*

**physics**

an archer shoots an arrow into a piece of wood. the arrow is traveling at 120km/h when it strikes the wood. the arrow penetrates 3.8cm into the wood before stopping. what is its average acceleration (in m/s squared) into the wood?
*April 6, 2015*

**Physics**

Hi, I've been stuck on this for days! I'd love if I can get some help. Two unfortunate climbers, roped together, are sliding freely down an icy mountainside. The upper climber (mass 80kg ) is on a slope at 16∘ to the horizontal, but the lower climber (mass 65kg...
*April 3, 2015*

**Physics**

Hi guys, I'm a little stuck on this question I'm doing at the moment. If anyone has spare time, I'd be extremely grateful! A lens with 50-cm focal length produces a real image the same size as the object. a)How far from the lens is the object? b)How far from the ...
*March 18, 2015*

**Physics**

It's not 0%
*March 18, 2015*

**Physics**

Hello!I was wondering if anybody had the time to help me with this question. I am not sure what equation to use with three polarizing filters! I thought we use Malus' Law, but doesnt seem to work. Any help would be greatly appreciated!! The question: Unpolarized light ...
*March 18, 2015*

**Math**

not sure
*March 16, 2015*

**Math**

An art class is planning to paint a rectangular mural with an area of 60 square feet. It has to be at least 4 feet high but no more than 6 feet high. The length and width have to be whole numbers. List all possible lengths for the mural.
*March 16, 2015*

**Physics**

thanks for your time:)
*March 14, 2015*

**Physics**

Hi, can anybody provide some hints in how to approach these questions? I've been stuck on it for days!!! Thank you in advance!! Nodes of a Standing Wave: Consider a standing wave, where y represents the transverse displacement of a string that extends along the x direction...
*March 14, 2015*

**Physics**

Hello to all the fantastic tutors! I'm stuck on this question, I was wondering if there is a way to solve this. A car horn emits 378Hz sound. If the car moves at 23m/s with its horn blasting, what frequency will a person standing in front of the car hear? What I've ...
*March 10, 2015*

**Physics**

A transverse wave 1.1cm in amplitude is propagating on a string; the wave frequency is 44 Hz. The string is under 23-N tension and has mass per unit length of 16g/m . What is the wave speed? What I've done: using sqrt(Tension/mass_per_unit): sqrt(23/16)=1.19m/s But not ...
*March 5, 2015*

**physics**

A car traveling at 20 m/s stops in a distance of 50 m. Assume that the deceleration is constant. The coefficients of friction between a passenger and the seat are µs = 0.5 and µk = 0.03. Will a 70-kg passenger slide off the seat if not wearing a seat belt?
*February 23, 2015*

**math**

A band made a profit of 352.00 and sold 116 tickets and spent 25.00on advertising. How much was the cost of one ticket? T=the cost of one ticket. 116T-25.00=352.00 116T+25.00=+25.00 116T=377.00 116/116T=377.00/116 T=3.25
*February 22, 2015*

**Science**

What is the same in two isotopes of an element? What is different?
*February 10, 2015*

**8th grade Science please help**

Why is soda in an unopened bottle a homogenous mixture?
*February 1, 2015*

**science answer fast please!**

Could a molecule contain only one atom? Explain your answer.
*February 1, 2015*

**science**

Why is graphite considered an element?
*February 1, 2015*

**science gases**

The air that you breathe is a gas.List other gases that you have heard about in a science class.
*January 27, 2015*

**science**

When the temperature of the air in a hot air balloon increases, what happens to the volume of the gas?
*January 27, 2015*

**Physics**

By trial and error, a frog learns that it can leap a maximum horizontal distance of 1.26 m. If, in the course of an hour, the frog spends 27.5 % of the time resting and 72.5 % of the time performing identical jumps of that maximum length, in a straight line, what is the ...
*January 27, 2015*

**Spanish II**

Thank you so much!I am happy to know that my answers weren't as far off as I originally thought. I have a PC with Windows 8. On Microsoft word I use the symbols to make accent marks but I'm not sure how to on my computer.
*January 27, 2015*

**Spanish II**

Hi! I have completed this assignment but I felt like I was guessing throughout the whole thing. Since I could not underline I instead put 5 periods and the numbers instead; the answers are below the paragraph. Is this paragraph correct? Complete the following paragraphs with ...
*January 27, 2015*

**math **

if Dave is 21 years old 2014 how how old will he be in 2020
*January 15, 2015*

**chemistry**

the answer is 9.2 L and 34 lbs.
*December 15, 2014*

**Math**

Mindy picked 4 times as many daisies as tulips for a flower bouquet. She picked a total of 20 flowers. How many more daisies than tulips did she pick?
*November 10, 2014*

**Math**

What 3 positive integers satisfy a^3+b^3=c^3 ?
*November 6, 2014*

**math please help**

Suppose that ice cream consumption per person at parties is normally distributed with a mean of 0.39 gallons, and a standard deviation of 0.26 gallons. If you are throwing a party with 33 guests, how much ice cream do you need to buy to make sure that the probability of having...
*October 24, 2014*

**math**

HELP HELP PLEASE The University of Townville gives a full scholarship to any student who scores in the top 4% of students on the SMRT standardized exam. SMRT scores have a mean of 260 and a standard deviation of 22. What score does a student need to attain in order to receive ...
*October 20, 2014*

**Math**

Is 0.600 kg lighter than 1.00kg?
*October 7, 2014*

**Physics**

A 0.600-kg ball traveling 4.00 m/s to the right collides with a 1.00-kg ball traveling 5.00 m/s to the left. After the collision, the lighter ball is traveling 7.25 m/s to the left. What is the velocity of the heavier ball after the collision?
*October 7, 2014*

**Physics-Intro**

A 0.600-kg ball traveling 4.00 m/s to the right collides with a 1.00-kg ball traveling 5.00 m/s to the left. After the collision, the lighter ball is traveling 7.25 m/s to the left. What is the velocity of the heavier ball after the collision?
*October 7, 2014*

**Values**

Why do teenagers rebel?
*October 7, 2014*

**Math**

let s(t)= t^4-4t^3+8t for 0 ≤ t ≤ 4 find the total distance traveled by the object. find where the acceleration is positive.
*October 5, 2014*

**math help**

Which is equivalent to 14x-3y+2z=100 -17x+8y+10z=11 -3+13y+29z=81
*May 19, 2014*

**Chemistry**

The observed general trend in ionization energies shows two slight discontinuities in each period. Examine the electron configuration at these points and explain why such a discontinuity may occur.
*April 9, 2014*

**Social Studies**

I know his ideals,but I don't know how should I write about the reality? For example, october crisis, can you give me an idea how does october crisis affect his ideals?
*March 11, 2014*

**Social Studies**

I have to explain how does Pierre Elliot Trudeau's ideals meats the reality in 200 words? So can you give me some ideas about how should I write it?
*March 11, 2014*

**Social Studies**

To what extent do you think that Pierre Elliot Trudeau was the right man for his time? 200 words
*March 11, 2014*

**Social Studies**

How does Pierre Elliot Trudeau's idealism meets the reality? 150 words
*March 11, 2014*

**English**

Here are some quotes in Pride and Prejudice, can you help me to analyze it, remember to write it in your own words, I'm not good at analyzing, so... 1. It is a truth universally acknowledged, that a single man in possession of a good fortune, must be in want of a wife. 2. ...
*February 27, 2014*

**English**

Can you write this paragraph in your own words, so I can understand, but don't make the paragraph too short.
*February 17, 2014*

**English**

But his reference to Shakespeare is especially deliberate, being in the form of a solemn and last appeal to his friends among the scholarly dramatists to relinquish their connection with the presumptuous and ungrateful stage.
*February 17, 2014*

**Drama**

Can you read this and give me some idea about how I should block the scene because I have to perform it. Hi, I'm William Shakespeare. I had disappeared from the records for seven years. Many rumors flew around, including that I liked to poach. They say I had to leave ...
*February 17, 2014*

**history**

Answers are POORHOUSES and FACTORYS.
*February 17, 2014*

**English**

Can you check if there's grammar mistakes in this monologue, if there is, can you correct it for me. Hi, I'm William Shakespeare. I had disappeared from the records for seven years. Many rumors flew around, including that I liked to poach. They say I had to leave ...
*February 17, 2014*

**Chemistry**

Equation: Fe+CuCl2>FeCl2+Cu We put two iron nails into the copper chloride solution:1. mass of empty dry beaker:103.64 2. mass of two iron nails, before reaction:1.20 3. mass of two iron nails after reaction: 1.01 4. mass of beaker and copper (dry):104.4 Through ...
*February 16, 2014*

**Chemistry**

If the tongs used in the experiement were made of pure iron, what might happen if the tongs were allowed to remain in contact with the CuCl2 solution?
*February 16, 2014*

**Chemistry**

Equation: Fe+CuCl2>FeCl2+Cu The ratio of moles of copper produced to moles of iron reacted should be 1:1,but I get 60:17 in lab,can you state at least 3 errors for me?
*February 16, 2014*

**English**

Can you read this essay first, and then tell me how I should block the scene and perform it, I have no idea how I should do this. Hi, I'm William Shakespeare. I had disappeared from the records for seven years. Many rumors flew around, including that I liked to poach. They...
*February 16, 2014*

**English-help me please**

Can you change the hard English words to easy ones and make the long sentences a little bit short for me? I have to memorize it and perform it, so I need this monologue to be easier. Monologue:Shakespeare's relationship with Robert Greene For seven years, I was disappeared...
*February 16, 2014*

**Social Studies**

laissez-faire and different political ideologies:conservative, liberal and socialist.
*February 15, 2014*

**Social Studies**

If you are a member in Liberal party, what would you say about the great depression in Canada, I mean your idea?
*February 15, 2014*

**English**

How can I direct a key scene in Macbeth?
*February 9, 2014*

**English**

Question's about shakespeare? 1. What kind of music speaks to him the most? 2. For him, what role should the government have in a person's life? 3. For him, is the glass half empty or half full and why? I cannot find the answers for these questions online.
*February 4, 2014*

**Social Studies**

significance of liberation of the netherlands
*February 2, 2014*

**Social Studies**

In what ways did the Treaty of Versailles and the Great Depression help bring Hitler to power?
*February 2, 2014*

**Social Studies**

Explain the significance of the following for Canada and the World War 2: Dieppe, Ortona, D-Day, and liberation of the Netherlands.
*February 2, 2014*

**Social Studies**

Why is the Holocaust a great reason to support the current Canadian policy of multiculturalism?
*February 2, 2014*

**Chemistry**

All these
*January 25, 2014*

**Chemistry**

Air Pollution: How do I use equations to describe the question "How is it formed?' for the air pollution?
*January 25, 2014*

**4th grade social studies**

why did the king of spain give florida land away to foreigners? I can't find any thing on the internet?
*January 22, 2014*

**English**

Write this in your own words. what is Pollution? Pollution is the introduction of contaminants into the natural environment that cause adverse change.[1] Pollution can take the form of chemical substances or energy, such as noise, heat or light. Pollutants, the components of ...
*January 22, 2014*

**Physics**

E=Q Q=mct E=1/2mv^2*10 5mv^2=mct 5*2*3.99^2=0.1*450*t T=3.53. C
*January 16, 2014*

**Drama**

About the movie" Hotel Rwanda¡±£º 1. 1. What moment did Paul's life change? 2. Could Paul have changed his mind? 3. At what moment was Paul past the point of no return? 4. What are the positive and negative sides of attempting to recreate ...
*January 15, 2014*

**Chemistry**

How do I write a blog for my chemistry project?
*January 7, 2014*

**Social Studies**

What kind of personalities did Canada have in the 1920s? Here we should treat Canada as a patient, so I think Personalities here means its character and nature, but not a famous person.
*December 31, 2013*

**Psychology**

How do I write a conclusion and recommendation for a psychological report? This report is about analyze Canada's relationship with Great Britain, USA and itself in the 1920s.
*December 31, 2013*

**Social Studies**

The teacher said we should treat Canada as a patient here and then analyze its relationship with itself.
*December 31, 2013*

**Social Studies**

During the 1920s, what were the various personalities of Canada, which personalities were dominant, which personality were starting to assert itself, and which personalities were still being ignored or mistreated? And "Personalities¡±here means Canada's ...
*December 31, 2013*

**Social Studies**

The teacher let us analyze Canada's relationship with itself in the 1920s. We are doing this in a psychological report and we should treat Canada here as a patient. I just don't understand what does he mean by attitude and where should I start?
*December 31, 2013*

**Social Studies**

It's talking about its attitude in the 1920s.
*December 31, 2013*

**Social Studies**

How would you describe Canada's attitude to money,work,entertainment and the past and the future?
*December 31, 2013*

**english**

what sound devices does Dickinson employ in the phrase, "too cool for Corn", "But when a Boy, and Barefoot"? alliteration, slant rhyme
*December 26, 2013*

**math**

OHHHHH..... okay i understand now... Thanks!!
*November 8, 2013*

**math**

If a Realtor earns 6% commission for selling $70,000 home, what is the amount of the commission?
*November 8, 2013*

**algebra**

Please help find the root(values of x when the expression is equal to zero) 3x^2+21x=0
*October 3, 2013*

**economics**

Discuss the role of advertising in product differentiation and the intent of advertising in altering the firm’s demand curve.
*September 20, 2013*

**Chemistry**

The temperature of a 12.58g sample of calcium carbonate increases from 23.6degrees celcius to 38.2 degrees celcius. If the heat capacity is 0.82J/g-K, how many Joules of heat are absorbed
*June 18, 2013*