Monday

December 5, 2016
Total # Posts: 3,582

**Social Studies**

10 is correct

*September 15, 2015*

**Chemistry**

When 1.63 g sample of an unknown hydrocarbon is completely burned in oxygen, 4.97 g of CO2 are produced. What is the percentage by mass of hydrogen in this hydrocarbon? THANK YOUU Found out the formula: 4CH+5O2--> 4CO2+2H2O then found out the moles of CH= 0.1251 I don't...

*September 14, 2015*

**Math**

At a track meet, 50 people ran the 100-meter dash. 2 people finished in 11 seconds, 5 people finished in 12 seconds, 8 people finished in 13 seconds, 10 people finished in 14 seconds, 21 people finished in 15 seconds, 2 people finished in 16 seconds, and 2 people finished in ...

*September 14, 2015*

**Math**

Janine wants to paint just the sides of a cylindrical pottery vase that has a height of 45 cm and a diameter of 14 cm. To the nearest whole number, find the number of square centimeters she will need to paint. Explain the method you would use to find the lateral area.

*September 14, 2015*

**Math**

An hourglass, composed of two identical cones, is 12 cm tall. The radius of each cone is 3 cm. If you want to fill the bottom half of the hourglass full of salt, how much salt will you need? Explain the method you would use to find the amount of salt.

*September 14, 2015*

**Chemistry**

Calculate the number of moles of carbon atoms present in 2.2 g of ethanol (C2H6O). For this question, I would just need to find the molar mass of carbon, right? Not the molar mass of all of ethanol? So it would just be 2.2 g/ 24.02 g/mol which would equal .092. It wouldn't...

*September 13, 2015*

**Math 9th Grade**

Write an expression for the distance a car travels in t hours at a speed of s km/h

*September 12, 2015*

**Physics**

A person exerts a force of 90 N on a rope that pulls a sled across a very smooth surface. The rope is oriented 37∘ above the horizontal. The sled has a total mass of 40 kg . The sled starts at rest and moves for 10 m.

*September 12, 2015*

**ap calculus**

((1/-2-h)-1)/h

*September 11, 2015*

**Math**

if a bullet travels at 645.0m/s, what is its speed in miles per hour? can you please show me how to solve this?

*September 10, 2015*

**Chemistry**

Round each number to two significant figures: 233.356 0.002353 1.005 Can you please show me and explain how to do this? Im confused. thank you!!!

*September 10, 2015*

**Math**

A triangle has side lengths 10, 15, and 7. Is the triangle acute, obtuse, or right? Show your work and explain. I think it's gonna be an obtuse and maybe right....might be wrong...

*September 10, 2015*

**Chemistry**

Hi! I really really need help in this question: what observation is expected when: 1. an acid (nitric acid, HNO3) is added to a solution containing carbonate or bicarbonate ions? 2. silver ion is added to a solution containing chloride (or bromide or iodide) ions? Please help ...

*September 9, 2015*

**probability**

thanks Reiny, the buttons were pushed

*September 9, 2015*

**probability **

Two hunters shoot at the same duck. The probability of the first hunter hitting the duck is 0.2. The probability of the second hunter hitting the duck is 0.75. Hitting the duck results in its death. What is the probability of the duck being killed?

*September 9, 2015*

**probability **

A survey asks people about their reading habits with respect to three newspapers. The results show that 56% read newspaper A, 33% read newspaper B, and 27% read newspapers C. 7% of the respondents read newspapers A and B, 8% of the respondents read newspapers B and C, 11% of ...

*September 9, 2015*

**Chemistry- PLEASE HELP**

Hi! I really really need help in this question: what observation is expected when: 1. an acid (nitric acid, HNO3) is added to a solution containing carbonate or bicarbonate ions? 2. silver ion is added to a solution containing chloride (or bromide or iodide) ions? Please help ...

*September 9, 2015*

**CHEMISTRY**

i meant Pb304…sorry, my mistake

*September 9, 2015*

**microeconomics **

Budget constraint 1 is faced when price food = 10 and price clothing = 5. Budget constraint 2 is faced when pfood = 40/7 and pclothing = 10. The income is 100 for both budget constraints. Draw both budget constraints. Next, draw the following four consumption bundles in your ...

*September 7, 2015*

**English: Amoretti LXXV: One Day I Wrote Her Name**

What are three questions asked in this sonnet. If you can help great! If not that's fine

*September 7, 2015*

**physics**

A tourist being chased by an angry bear is running in a straight line toward his car at a speed of 4.09 m/s. The car is a distance d away. The bear is 20.9 m behind the tourist and running at 6.04 m/s. The tourist reaches the car safely. What is the maximum possible value for ...

*September 7, 2015*

**microeconomics **

Save Open Spaces (SOS) is a non-profit organization that promotes protection of undeveloped land. They perform two primary activities: purchasing undeveloped land for preservation and lobbying Congress for additional protection for undeveloped land. SOS has a budget of $600,...

*September 7, 2015*

**microeconomics **

Mickey is very picky and insists that his mom makes his breakfast with equal parts of cereal and apple juice. Any other combination ends up on the floor. Cereal costs 4 cents per tablespoon and apple juice costs 6 cents per tablespoon. If his mom budgets $8 per month for his ...

*September 7, 2015*

**Physics**

In a cathode ray tube, a beam of electrons is injected horizontally into the exact center of the parallel-plate region. Here L = 3.0 cm and d = 0.20 cm. The top plate has a surface charge density of σ0 = +0.15 μC / m2, and the bottom plate has a surface charge ...

*September 7, 2015*

**Physics **

Inside a metal conductor, why is it not possible to have a static charge configuration if there is a net electric field?

*September 7, 2015*

**american history**

That link doesn't have a specific site ...it brings out google ...

*September 3, 2015*

**american history**

Did the Watergate scandal have any lasting effects on the nation? Explain.

*September 3, 2015*

**american history**

What factors led the wartime alliance between the United States and the Soviet Union to disintegrate into the Cold War?

*September 3, 2015*

**american history**

What were the key aspects of Lyndon B. Johnson’s Great Society?

*September 3, 2015*

**american history**

What factors led the wartime alliance between the United States and the Soviet Union to disintegrate into the Cold War?

*September 2, 2015*

**american history**

How did the New Deal affect women, African Americans, and Native Americans?

*September 2, 2015*

**american history**

What were the causes of World War I?

*September 2, 2015*

**Math**

If Ms. Herbert gives her class a English quiz every 6 days any math quiz every 10 days when is the first day there will be a math and English quiz on the same day

*September 1, 2015*

**american history**

What was factory work like in the late 1800's?

*September 1, 2015*

**american history**

How did the spoils system affect politics during the Gilded Age?

*August 31, 2015*

**american history**

I'm still confused

*August 31, 2015*

**american history**

In the 1812-1860

*August 31, 2015*

**american history**

What arguments did supporters of the public school movement make to support their cause?

*August 31, 2015*

**american history**

Why did so many colonists protest the Stamp Act?

*August 31, 2015*

**Chemistry**

In chemical analysis, it is often necessary to prepare a solution by diluting a stock solution.Calculate how much of a 5.337M NaOH is needed to make 1.669 liters of a 0.063M sodium hydroxide solution. (Remember to include units.)

*August 26, 2015*

**Chemistry**

To determine the concentration of 10.31mL of an unknown solution of a monoprotic acid, it is titrated with 0.172M sodium hydroxide. The initial reading on the buret of sodium hydroxide is 2.19mL. The final reading is 13.41mL. What is the concentration of the unknown acid?

*August 26, 2015*

**Social studies **

Mayan priests interest in astronomy led to the creation of ____. A. a 365-day calendar B. A book of rules C. Human sacrifices D. Cave paintings Which one is correct ? Please help

*August 25, 2015*

**Physics**

19. A track consists of a frictionless incline plane, which is a height of 0.5 m, and a rough horizontal section with a coefficient of kinetic friction 0.02. Block A, whose mass is1.5 kg, is released from the top of the incline plane, slides down and collides instantaneously ...

*August 24, 2015*

**Algebra**

You invested 20,000 in two accounts paying 4% and 7% annual interest, respectively. If the total interested earned for the year was $830, how much was invested at each rate?

*August 21, 2015*

**Art**

Would it be space?

*August 20, 2015*

**Art**

1. In the image, Green Wheat Fields, Auvers by Vincent van Gogh, which of the following elements was not used to create the principle of harmony? A. Colors B. Form C. Line D. Texture 3. In the image, The Annunciation, by Jan van Eyck, which element in this image creates ...

*August 20, 2015*

**pre-calculus urgent**

Please help me here as well to clarify more my understanding. Let a1, a2, a3, . . . be a geometric sequence with initial term a and common ratio r. Show that a1^2, a2^2, a3^2, . . . is also a geometric sequence by finding its common ratio. Given that the ratio for a1, a2, a3...

*August 15, 2015*

**pre-calculus urgent**

The first term of an arithmetic sequence is 6, and the tenth term is 2. (a) Find the common difference d. d = Find the 100th term of the sequence. a100 = (b) Find the partial sum of the first ten terms. S10 = how do i do this, there's an example I tried following but it ...

*August 15, 2015*

**Math**

Drew is twice as old as his sister joy.The quotient of their ages five years ago is seven less than Joy's present age. Find out how old they are at present.

*July 29, 2015*

**Algebra**

m+7/m^2+4m-21

*July 26, 2015*

**Chemistry**

Why is the rate determining step the slowest step?

*July 9, 2015*

**American History**

What caused the King Philip's war? Can you briefly explain or send me some links to sites.

*July 7, 2015*

**Business**

Unions have a substantial impact on the compensation and work lives of both unionized and non-unionized workers. Unions raise wages of unionized workers by roughly 20% and raise compensation, including both wages and benefits, by about 28%. Unions reduce wage inequality ...

*July 5, 2015*

**personal finance **

You purchase a car $22,000. The interest rate is 5% and you decide to pay over a period of 5 years. What is your payment?

*July 5, 2015*

**physics**

You push against a steamer trunk at an angle of 33° with the horizontal . The trunk is on a flat floor and the coefficient of static friction between the trunk and floor is 0.55. The mass of the trunk is 43 kg. What is the minimum magnitude of force that will allow you to ...

*June 23, 2015*

**Public speaking **

Saying "gonna" instead of "going to" is an issue of: A. Body movement B. Eye contact C. Articulation D. Timing

*June 18, 2015*

**Physics**

A projectile of mass 0.636 kg is shot from a cannon, at height 6.6 m, as shown in the figure, with an initial velocity vi having a horizontal component of 6.8 m/s. The projectile rises to a maximum height of ∆y above the end of the cannon’s barrel and strikes the ...

*June 16, 2015*

**Physics **

Three blocks of mass 10kg, 20kg, 15kg respectively are being pushed in a row on along a horizontal surface with constant velocity by a force applied to the 10kg block.The coefficient of kinetic friction between each of the blocks and the surface is 0.18. What is the magnitude ...

*June 16, 2015*

**physics**

A jetliner is traveling east from Seattle to Chicago, a distance of 1,750 miles. The jetliner travels at an average air speed of 620 mph relative to the air. At the jetliner's altitude, the wind is blowing 46 mph to the east. How long does the journey take?

*June 15, 2015*

**physics**

An astronaut in a spacecraft looks out her window and observes a comet travel in the opposite direction at a relative speed of 237 m/s. The velocity of the spacecraft is 114 m/s directly away from the sun. What is the comet's velocity relative to the sun? Assume that ...

*June 15, 2015*

**physics**

A stone is thrown vertically upwards, reaches a highest point, and returns to the ground. When the stone is at the top of its path, its acceleration

*June 15, 2015*

**physics**

Hot air balloon A is rising upward a rate of 5.0 m/s. A passenger aboard balloon A observes balloon B rising upward at a relative rate of 7.5 m/s. What is the velocity of balloon B relative to the ground? Assume that up is positive.

*June 15, 2015*

**physics**

A test rocket is fired straight up from rest. The net acceleration is 20 m/s2 upward and continues for 4.0 seconds, at which time the rocket engines cease firing. What maximum elevation does the rocket reach?

*June 15, 2015*

**Calculus**

So don't write cos x = 0 and sin x = 0 ?

*June 15, 2015*

**Calculus**

Okay

*June 15, 2015*

**Calculus**

Yes, so what work do I need to show how I got a Absolute Maximum at pi/2 and 3pi/2

*June 15, 2015*

**Calculus**

To show how I got the answer, is the work sufficient? f(x)= sin^2(x) f'(x)=2sinx(cosx) = cosx(2sinx) cosx=0 sinx=0 f(0)=0 f(pi)=0 f(pi/2)=1 f(3pi/2)=1 Absolute Maximum is at pi/2 and 3pi/2

*June 15, 2015*

**Calculus**

On the closed interval, [0, 2*pi], find the absolute maximum of the function f(x)= sin^2(x)

*June 15, 2015*

**Calculus**

-3/2 feet per minute I meant

*June 15, 2015*

**Calculus**

Is this right? 1.5 ft = dr/dt 2x dx/dt + 2y dy/dt = 0 2(18)(2) + 2(24)= 0 72 + 48 dy/dt = 0 48 dy/dt = -72 dy/dt = -72/48 = -3/4 feet per minute

*June 15, 2015*

**Calculus**

36 dx/dt + 48 dy/dt = 0 48 dy/dt = -36 dx/dt dy/dt = -.75 or -3/4

*June 15, 2015*

**Calculus**

So what's next to find the rate at which the ladder is moving toward the building when it is 18 ft from the wall?

*June 15, 2015*

**Calculus**

A ladder 30 ft. long is leaning up against a building. If the top of the ladder is being pulled up the wall of the building at a rate of 1.5 feet per minute, find the rate at which the base of the ladder is moving toward the building when it is 18 feet from the wall.

*June 15, 2015*

**French, foreign languages**

Hi the following sentences are basically unscrambling them in the first place and then putting the sentence in order. If when looking through my unscrambled sentences and you see something wrong with the grammar or something of that nature that does not make the sentence ...

*June 14, 2015*

**French, foreign languages**

Hi, This are my answers using verbs from a list provided in the assignment in the future. If something within the sentences or if I have used a verb wrong please let me know and if possible tell me a correction I can make to make it more understandable or more grammatically ...

*June 14, 2015*

**French, foreign languages**

I need help understanding the present subjunctive in French and also the usage of Il faut in said sentence

*June 14, 2015*

**Math**

Byron’s house has a roof with dimensions shown. (Roof: 1m Height, 7m Hypotenuses, 12m length) He knows that the average rainfall in his suburb is 30cm per year. Byron would like to install a cylindrical rainwater tank to hold the water that runs off the roof. The tank is ...

*June 14, 2015*

**French, foreign languages**

I need help completing an assignment that includes completing sentences from a reading. T The questions have my answers within them to complete the sentence. Once you have read the the questions with my answers within the questions and you see something wrong with my answers ...

*June 13, 2015*

**MWS**

:)

*June 13, 2015*

**MWS**

well then that can be the answer thxs

*June 13, 2015*

**MWS**

First i thought it was new companies and now i have second thought i think it is now trade organizations what do you think

*June 13, 2015*

**MWS**

In recent times, Latin American countries have tried to improve their economies by forming these. Need help

*June 13, 2015*

**French, foreign languages**

Hi, Can you please check my sentences to see if I have the used verbs that are in the conditional correctly and also if they do not make sense tell me what I did wrong and if possible tell me what corrections I should make. Here are my sentences and the questions: Dans un ...

*June 13, 2015*

**French, foreign languages**

Hi, I desperately need help with double object pronouns in French. Here are questions that I am working on and I can't make heads nor tails of them: L'agence de voyages a envoyé les billets d'avion à mes parents. Mes parents ont acheté de ...

*June 13, 2015*

**French, foreign languages**

What verbs are in the conditional in French as I need it for an assignment that I am working on: 1.Dans un monde idéal, il n'y... 2. Vous n'avez pas d'argent? À votre place (In your place), je/j'... 3.On n'a pas cours lundi. On... 4.Dans un ...

*June 13, 2015*

**MWS**

well then thanks for the help i think i got it from here

*June 12, 2015*

**MWS**

because there were more job opportunities

*June 12, 2015*

**MWS**

Why has the sunbelt experienced growing populations over the past decades?

*June 12, 2015*

**French, foreign languages**

Here is what I think number 2 is : Mes parents achete les leur a mi soeur et a moi. For number 3 I have: Nous avons demande les leur visas aux différents consulats.

*June 12, 2015*

**French, foreign languages**

Hi, I desperately need help with double object pronouns in French. Here are questions that I am working on and I can't make heads nor tails of them: L'agence de voyages a envoyé les billets d'avion à mes parents. Mes parents ont acheté de ...

*June 12, 2015*

**science**

) If an ocean is opening at a rate of 5 cm/year and it has been doing so at the same rate for 10 million years, approximately how wide is that ocean?

*June 12, 2015*

**Math**

Cheers Steve.

*June 10, 2015*

**Math**

If f and g are functions defined for all real numbers, and f is an odd function, then f ∘ g is also an odd function. Justify. I wrote false cause for example if f = x^3(odd) and g=x^2(even) the fog is even.

*June 10, 2015*

**Physics**

A race car travels on a flat circular track at the maximum possible speed without slipping. If the radius of the track is 39m and the coefficient of friction is 0.73, how long (seconds) does it take the race car to complete 5 laps?

*June 9, 2015*

**math**

balance on an initial investment of $1,500 over 25 years at 5% APR. After 10 years about how much interest has the investment earned

*June 6, 2015*

**6th Grade World History Help Please!**

the answer is B

*June 5, 2015*

**Calculus**

Describe the solid whose volume is represented by the following definite integrals. The integral of 2pi(x-1)e^x from 2 to 7.

*June 5, 2015*

**Social Studies**

opps wrong disscution

*June 4, 2015*

**Social Studies**

ok ok ok ok i did read

*June 4, 2015*

**language arts**

not going to help anymore bad at helping people at least i tried

*June 4, 2015*