Monday

April 21, 2014

April 21, 2014

Total # Posts: 914

**Chemistry **

What volume in liters of C3H7Cl is produced if 400.0g of C3H8 (propane) reacts with excess chlorine gas according to the equation C3H8+ Cl2 --> C3H7Cl+HCl

**Math**

Jason Printing has $85,000 to invest. They can invest in Wilder Revenue at 10% compounded semiannually or at Cheapskate Investments at 9.8% compounded monthly. a) Calculate the two APYs and compare them to determine your answer. Make sure to distinguish which APY belongs to wh...

**algebra**

A baseball player hits a ball toward the outfield. The height h of the ball in feet is modeled by h(t) = -16t2 + 22t + 3, where t is the time in seconds. In addition, the function d(t) = 85t models the horizontal distance d traveled by the ball. If no one catches the ball, how...

**chemistry**

Hg2Cl2 = Hg + HgCl2 Please help me write the two half equations for this.

**Chemistry**

How many grams of C would be necessary to produce 790. grams of CaCO3 by the sequence of reactions shown below? Step 1: CaO + 3C → CaC2 + CO Step 2: CaC2 + N2 → CaCN2 + C Step 3: CaCN2 + 3H2O → CaCO3 + 2NH3

**Pre-Calc**

Eliminate the parameter x = abs(t-3) and y = t + 3...how do you undo the absolute value in order to get y=?

**Math**

Thank you

**algebra**

Find a slope of a snowboarding beginner hill that decreases 24 feet vertically for every 30 foot horizontal increase

**Science**

1. A 2. C 3. A 4. C 5. D

**math**

A model plane is 1/48 the size of the actual plane.if the model plane is 28 inches long how long it's the actual plane

**World History**

What was the anaconda Plan

**Writing**

Ok Hack. Thank you. Ill try it and c how it works out. :)

**Writing**

what is a good opening sentence to a short story? no matter what genre im writing? plz help me. from a girls point of view.

**Writing?!**

thanks. you guys helped me a lot. i got tons of ideas i hope the story will be fine.

**Writing?!**

does anyone know good realistic fiction topics and conflicts? i love writing but have a hard time with this genre because everything has to be able to occur in real life. :( im better at fake stuff. So plz plz help me!

**Novel Help**

Hey, realistic fiction can really occur. Im not a fan either i love to write but not realistic fiction! Maybe a girl ran away when he parents get into a car crash or she decided to commit suicide because she thinks she is alone. Hope it helps! :)

**history**

Can someone please help me? :) 1. Which of the following best describes the beliefs of Andrew Jackson? (1 point) States’ rights should be exercised over federal law. Federal funds should be kept in a national bank. The nation should have a strong federal government. Force...

**Science**

I don't understand, which ones did you get wrong?

**Math**

The distance traveled (in meters) by the Oregon slug can be modeled by the function f(t) = 0.9t, where t is the time in minutes. Find the distance traveled in 27.5 minutes.

**Physics**

A spring (k=302 N/m) placed vertically on a surface has a 548 g ball placed on top of it. How far must the spring be compressed in order for the ball to be traveling at a speed of 2.8 m/s when it is located 438 cm above its initial position?

**math**

I do not get how you got 3times as much when they aren't fully simplified.

**math**

A jar of peanut butter which is 3 inches in diameter and 4 inches high sells for $0.60. At the same rate, what would be the price for a jar that is 6 inches in diameter and 6 inches high?

**math**

An appliance is on sale at a 30% discount. If the sale prices is $42,000, what was the original price of the appliance?

**math**

the formula for finding the surface area of a cube is A=6s with 2 at the corner where s is to the lengh of one side of the cube. what is the volume of the cube with side lengh of one half inches?

**Chemistry**

Determine the molar mass of a compound and its molecular formula if a solution of 1.00 g of the unknown is dissolved in 50 grams of cyclohexane. Cyclohexane freezes at 6.02 oC. The normal freezing point of cyclohexane is 6.50 oC and its kf value is 20.2 oC/m. The percent compo...

**Social Studies**

This is for a Latin class, but as it has nothing to do with the language, it is more of a social studies question. For homework we had to complete a project on the Roman Empire. One part was to find all of the provinces, label them on a map, find the year they became a provinc...

**physics**

because of deformation, what can kinetic energy be converted into?

**social studies**

upon what did the success of southeast Asian empires frequently depend ?

**Please finish this:)**

This homework question was removed due to a copyright claim submitted by the National Network of Digital Schools Management Foundation (NNDS).

**Math:)**

I'm sorry, the equation that I forgot to put was 100w+10,000=220w+7,000. That's the one @Reiny I forgot to mention. Now how do you do PART 2? Thanks!

**Math:)**

Can anyone help?

**Math:)**

This homework question was removed due to a copyright claim submitted by the National Network of Digital Schools Management Foundation (NNDS). Thank you!:)

**Algebra**

In the logarithmic expression . . . log(base 4) 8 , how does the base 4 become base 2? Here is how it is suppose to be worked out: log(base2)8 / log(base2)4 => log(base2)2^3 / log(base2)2^2 => 3/2

**Algebra**

How do you find a new salary if you know the amount of a cut/raise and the salary before the cut/raise?

**Algebra**

Okay, thank you!

**Algebra**

Can logarithms have negative answers?

**Math**

18?

**Math**

the ratio of males to females in a college class is 2:6. If there are 72 students in the class, how many are male?

**math**

San fran won 21 games and lost 26. what is their ratio of games won to games played?

**history**

how did George washington successfully lead a new nation? how did john adams successfully lead a new nation? thank you!

**science help plzzz**

1. A 2. C 3. C 4. C 5. D

**history**

thank you!!!

**history**

how were slaves treated in the american south?

**sicence**

Which example describes a method of relative dating? A. examining historical records to determine when a volcano erupted B. using radioactive isotopes to calculate the age of a rock C. measuring the depth of tree bark D. using fossils to determine the oldest rock layer in a ca...

**Can someone check these answer for me?**

1. A. 2. D 3. B 4. C 5. B

**Chemistry**

30

**Physics**

VERTICAL SPRING A spring of negligible mass, spring constant k = 89 N/m, and natural length l = 1.4 m is hanging vertically. This is shown in the left figure below where the spring is neither stretched nor compressed. In the central figure, a block of mass M = 2 kg is attached...

**Physics**

Two identical cars (m = 1350 kg) are traveling at the same speed of 28.1 m/s. They are moving in the directions shown in the drawing. What is the magnitude of the total momentum of the two cars?

**physics**

170dB

**elementary functions**

f(x)=x(squared)+x-3. compute the difference quotient: (f(x+h)-f(x))/h

**Physics**

How long does it take T-Rex to reach its food 200m away assuming that he starts from rest and accelerates at 4.00 m/s2?

**physics**

Sheena can row a boat at 3.13 mi/h in still water. She needs to cross a river that is 1.10 mi wide with a current flowing at 1.75 mi/h. Not having her calculator ready, she guesses that to go straight across, she should head 60.0° upstream. (a) What is her speed with respe...

**math**

factor (m/4 + n/3)(3m/4 - 2n/3) Is this the answer? if not, what did I do wrong? 3m^2/16 + mn/12 - 2n^2/9

**math**

solve for c: 3/4(2c+3)+3/5(8c-2)=9c

**math**

a ship leaves a port at 6 am traveling due east at 12mph. another ship leaves a port 11 am traveling due north at 15 mph. how far apart are they at 11pm to the nearest tenth mile?

**math**

When I went kite flying the other day, I let out an entire roll of string (400 feet). If when the string pulled tight formed a 40 degree angle with the ground, about how high was the kite?

**math**

Two metal alloys, containing 26% copper and 54% copper are to be mixed together to get 210 oz that is 30% copper. How much of each should be used?

**Stats**

Two dice are tossed. What is the probability that the sum of both dice is a prime number? this is the answer i have ; Presuming two fair, 6-sided dice, each numbered 1 through 6: You can achieve one of the following results on any given roll: 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12...

**Economics**

What do you think are the pluses (advantages) and minuses (disadvantages) when firms have market power? Be sure to explain your answer from a consumer and a firm’s point of view. why did ESPRIT closed all stores in the U.S. Include a few of these word Diseconomies of scal...

**Economics**

What do you think are the pluses (advantages) and minuses (disadvantages) when firms have market power? Be sure to explain your answer from a consumer and a firm’s point of view. why did ESPRIT closed all stores in the U.S. Include a few of these word Diseconomies of scal...

**Chemistry**

What is the normality of a solution which contains 4.03-g of sodium carbonate in 300.-mL of solution?

**government**

which provides evidence that political parties are not as strong as they once were? A. the increasing number of independents B. the lack of straight-ticket voting C. increased spending on campaigns D. increased numbers of registered Democrats

**Governmnet**

which of the mass media has the most impact on american politics? A. television B. the internet

**Math**

There are 6 members in a club and only 4 computers.Club meets for 60 minutes. Each member wants equal computer time. How much time should each student have?

**math**

Fred arrives at the subway station every day at a random time and takes the first train that arrives. If he takes the A train, which arrives each hour on the hour, he ends up at the fitness center. If he takes the B train, which arrives every hour 15 minutes after the A train,...

**math**

A small grill can hold two hamburgers at a time. If it takes 5 minutes to cook one side of a hamburger, what is the shortest time needed to cook both sides of five hamburgers? 30 15 20 25

**Math help please**

I agree with Ms. Sue. Negative number play seems to be the problem with the incorrect problems.

**Chemistry**

How do you find the equilibrium constant of: B + O2 <-> BO2 ??

**Calculus**

A rectangle in the first quadrant has one vertex as the origin, and other vertex on the curve y= -x^2 -2x +4. If the rectangle has one side lying on the x-axis, find the largest possible area of the rectangle.

**Calculus**

A rectangle in the first quadrant has one vertex as the origin, and other vertex on the curve y= -x^2 -2x +4. If the rectangle has one side lying on the x-axis, find the largest possible area of the rectangle.

**Statistics 7**

A doctor wants to estimate the HDL cholesterol of all 20 to 29 year old females. How many subjects are needed to estimate the HDL cholesterol within 2 points with 99% confidence assuming s-17.8 based on earlier studies. Suppose the doctor would be content with 90 % confidence....

**7 STATS MATHGURU PLEASE HELP**

A doctor wants to estimate the HDL cholesterol of all 20-29 year old females. How many subjects are needed to estimate the HDL cholesterol within 2 points with 99%confidence assuming s=17.8 based on earlier studies? Suppose the doctor would be content with 90% confidence. How ...

**Stats help**

A poll conducted in 1972 asked 1003 people, " During the past year, about how many books did you read either all or part of the way through?" Results of the survey indicated that x-bar=18.9 books and s=1 9.9 books. A)Construct a 95% confidence interval for the mean n...

**Stats help**

MathGuru, how do i determine the z-score for this one?

**Stats help**

A poll conducted in 1972 asked 1003 people, " During the past year, about how many books did you read either all or part of the way through?" Results of the survey indicated that x-bar=18.9 books and s=1 9.9 books. A)Construct a 95% confidence interval for the mean n...

**STATSHELP**

Got it thanks!

**STATSHELP**

Thanks!!!!!!!!!

**STATSHELP**

A poll was conducted that asked 1015 people how many books they had read in the past year. Results indicated that x-bar= 12.3 books and s=16.6 books. Construct a 95% confidence interval for the mean number of books people read. ____, _____ PLEASE HELP ME!!!!!!!!!!!!

**STATISTICS**

THANK YOU!

**STATISTICS**

Determine the point estimate of the population mean and margin of error for the confidence interval. Lower bound is 15, upper bound is 27. A)The point estimate of the population mean is ________. B) The margin for error for the confidence interval is _______. HELP

**Statistics**

THANK YOU

**Statistics**

THANK YOU

**Statistics**

A researcher wishes to estimate the proportion of adults who have high-spped internet access. What size sample should be obtained if she wishes the estimate to be within .02 with 90% if A) She uses a previous estimate of 0.48? B) She does not use any prior estimates? Please he...

**6th grade math**

Square root is just a fancy word for a number multiplied by its self. So you can also look at a very large multiplication table and look at 5 x 5 and 25 x 25 and so on.

**stats**

From previous records, a shipping company knows that the cost to deliver a small package within 24 hours is $15.50. The company charges $17.95 for shipping, but guarantees to refund the full charge if the delivery is not made within 24 hours. If the company fails to deliver wi...

**Stats**

Recall that in the week 2 assignment, a certain company hired three new managers from a pool of seven men and five women. All three hires were women, and the men complained of gender bias. Compute the theoretical probability that a fair selection process (in which each person ...

**science**

Meiosis is reproductive process that produces four haploid sex cells from one diploid cell and ensures offspring will have the same number of chromosomes as the parent organisms.

**science**

Asexual reproduction is a type of reproduction----fission, budding, and regeneration---in which a new organism is produced from one organism and has DNA identical to the parent organism. Sexual reproduction is a type of reproduction in which two sex cells, usually an egg and a...

**Math**

Thanks

**Math**

I know that I am saying this is how I am going to explain it. There is an answer choice it has: choice a)n/18 = 252 Choice b) 252/n = 18 Choice c) 18=n/252 Choice d) 252= 18/n Which is correct?

**Math**

Because I don't know how to post answer choices in FRACTION form???????

**Math**

All of my answer choices are in fraction form....

**Math**

Pam gave 252 water balloons to the people who came to a summer party. Each person received 18 balloons. Which equation can be used to find n, the number of people who came to the party?

**Precalculus **

Jessica deposited $785 into an account that pays 6.2% interest compounded continuously. How long will it take until Jessica has $1000?

**Statistics**

IQ score are normally distributed with a mean of 95 and a standard deviation of 17. If the sample size is n=36 find the mean and standard distribution of sample mean

**Science**

How do the oceans support life? How have the oceans and their marine life changed through time?

**Chemistry**

Okay so I'm having a brainfart here. I'm doing a titration problem and have got to the point of: 3.6x10^9 = (.01218-x)/(x)(.00316+x) I don't know how to proceed from there and use the quadratic formula as silly as it sounds. Any help would be appreciated!

**Math**

So then the equals 3.3 ???? thats not an answer choice

**Math **

One week, Mrs. Peterson went to her health club on Monday, Wednesday, and Friday. Each day she went to the club, she jogged on the treadmill for 3/5 hour, lifted weights for 1/4 hour, and then cooled down by stretching for 1/4 hour. On Saturday, she rode her bike for 3/4 hour....

**Algebra 1**

4. What is the value of the 11th term in the sequence? -1 , 5 , 11 , 17 , 23 , ...

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