Tuesday

September 30, 2014

September 30, 2014

Total # Posts: 1,700

**statistics**

4. Are women getting taller? In one state, the average height of a woman aged 20 years or older is 63.7 inches in 1990. A random sample of 100 women is taken to test if women’s mean height today is different from 1990. The mean height of the 100 surveyed women is 63.9 ...
*December 16, 2013*

**algebra**

How would you solve this one 40x^5-56x^4+24x^3 divided by -8x^2
*December 7, 2013*

**Bio**

What denotes the main relationship between protists and prokaryotes? do they both undergo transcription and translation? do they have different genetic codes?
*December 6, 2013*

**Math**

Suppose a baseball player had 211 hits in a season. In the given probability distribution, the random variable X represents the number of hits the player obtained in the game. x P(x) 0 0.1879 1 0.4106 2 0.2157 3 0.1174 4 0.0624 5 0.0060 a.) Compute and interpret the mean of ...
*November 26, 2013*

**Math help, anyone?**

11. would seem to me to be 9. It is fairly simply one to trick you. 12. x/4=6/7 multiply 6/7*4/x= 24/4 then simplify to get your answer. 15. 4 of 12 is 4/12 simplify
*November 26, 2013*

**algebra**

Remove the parentheses from the following expression, and combine like terms: (2x + 3y – 4z) – (x – y – z) A. 3x + 4y + 5z B. 3x + 4y – 3z C. x + 4y – 3z D. x + 2y – 5z
*November 17, 2013*

**Algebra**

–2x(–3x ^2y)(2y) = ? A. 12x^3y^2 B. –3xy^2 C. 3xy^2 D. –12x^3y^2
*November 17, 2013*

**really need help in math**

–2x(–3x 2y)(2y) = ? A. 12x3y2 B. –3xy2 C. 3xy2 D. –12x3y2 sorry that was the problem. i need help with this one. thanks xo
*November 15, 2013*

**really need help in math**

24x^2y^2 ?
*November 15, 2013*

**biochemistry**

i am currently doing an iodine value lab an error occured in my results and i do not know how to write up the conclusion and the discussion
*November 15, 2013*

**Circular motion Problem - moon completing an orbit**

Given that sidereal month, the amount of time it takes the moon to complete one orbit, is 27.332 days. How far is the moon from the earth?
*November 13, 2013*

**Circular motion Problem -Motorcycle HELP!!!?**

A motorcycle is traveling about a circle with radius of 15meters. If the coefficient of friction between the tires and the track is 0.76, how many laps can the motorcycle complete in one minute? (N o t e: Friction between the tires and the road enables a vehicle to turn)
*November 13, 2013*

**Circular motion Problem - Please! need HELP!!!fast**

An asteroid in space is attracted to the planet XYZ such that it accelerates at 0.0085 m/s^2 towards it. Given that planet XYZ has a mass of 4.7*10^24 kg. How far out from the planet is the asteroid?
*November 13, 2013*

**Fly Ball Lab - Projectile Motion Please HELP FAST!**

In this lab, you will perform graphical and mathematical analysis on a tennis ball that is struck by a bat. The data required for this lab is the horizontal displacement of the ball from the location where it was hit to the point where it first strikes the ground and the time ...
*November 12, 2013*

**physics-Gravitational Attraction(please help)**

1. The centers of two 11.80 kg spheres are separated by 0.09 m. What is their gravitational attraction? 2. What is the ratio of this attraction to the weight of one of the spheres (at the surface of the Earth)? Please answer both Thank you
*November 9, 2013*

**physics**

Radius of Curvature A bicyclist traveling at 8 m/s rides around an unbanked curve. The coefficient of friction (is this static or kinetic friction?) between the tires and the road is 0.36. What is the radius of the shortest turn that the bicyclist can safely make? Please, ...
*November 9, 2013*

**physics**

Gravitational Attraction 1. The centers of two 11.80 kg spheres are separated by 0.09 m. What is their gravitational attraction? 2. What is the ratio of this attraction to the weight of one of the spheres (at the surface of the Earth)? Please answer both, I'd be greatful. ...
*November 9, 2013*

**math**

What is the vertex of y=[-2x]?
*November 6, 2013*

**Physics**

When a person is given intravenous fluid, the bag containing the fluid is typically held about 1.2 m above the person's body. If the pressure in this fluid is just barely able to push the fluid into the person, what is the pressure in the person's blood? (The density ...
*November 3, 2013*

**English**

Which sentence is correct: They are planning a persons' party. or They are planning a people's party. I don't think either sounds correct, but these are the only choices!
*October 28, 2013*

**Statistics**

12) Allergic reactions to poison ivy can be miserable. Plant oils cause the reaction. Researchers at the Allergy Institute did a study to determine the effects of washing the oil off within 5 minutes of exposure. A random sample of 1000 people with known allergies to poison ...
*October 24, 2013*

**Statistics**

12) Allergic reactions to poison ivy can be miserable. Plant oils cause the reaction. Researchers at the Allergy Institute did a study to determine the effects of washing the oil off within 5 minutes of exposure. A random sample of 1000 people with known allergies to poison ...
*October 24, 2013*

**Statistics**

6)You are given the information that P(A) =0.30 and P(B) =0.40 (a) Do you have enough information to compute P(A or B)? Explain.(events A and B are mutually b) If you know that events A and B are mutually exclusive , do you have enough information to compute P(A or B)? Explain...
*October 24, 2013*

**Statistics**

a. Critical Thinking Critical Thinking Suppose you and a friend each take different random samples of data pairs (x,y) from the sample population. Assume the samples are the same size. Based on your samples, you compute r= 0.83. Based on her sample, your friend computes r = 0....
*October 20, 2013*

**Statistics**

A sociologist is interested in the relations between x=number of job changes and y=annual salary (in thousands of dollars) for people living in the Nashville area. A random sample of 10 people employed in Nashville provided the following information: X(Number of job changes)4 ...
*October 20, 2013*

**Biology**

You wish to produce a human enzyme, protein A, by introducing its gene into bacteria. The genetically engineered bacteria make large amounts of protein A, but it is in the form of an insoluble aggregate with no enzymatic activity. Which of the following procedures might help ...
*October 10, 2013*

**chemistry**

Consider the reaction between hydrogen and oxygen gases to form water: 2H2(g) + O2(g) ¨ 2H2O(l) Which of the following is not conserved in this reaction?
*September 30, 2013*

**intermediate algebra**

A local electronics store will sell seven AC adapters and two rechargeable flashlights for $86, or three AC adapters and four rechargeable flashlights for $84. What is the price of a single AC adapter and a single rechargeable flashlight?
*September 30, 2013*

**science**

An object with a mass of 70g and a volume of 100ml is most likely what substance
*September 26, 2013*

**Biochem**

Thank you!
*September 9, 2013*

**Biochem**

We will need 0.5L extraction buffer with 25 mM HEPES, 1 mM EDTA, and 1 mM DTT. Please calculate how many grams of each solute are needed. (HEPES 238.3; EDTA 292.2; DTT 154.2)
*September 9, 2013*

**small engane **

FIGURE A-9—This photo should be used to answer Question 15. 15. Two small engine technicians are disassembling the engine shown in Figure A-9. After observing the engine components, both technicians say that this engine has a splash-type lubrication system. Technician A ...
*September 5, 2013*

**Physics**

Identical point charges of +2.9 µC are fixed to three of the four corners of a square. What is the magnitude of the negative point charge that must be fixed to the fourth corner, so that the charge at the diagonally opposite corner experiences a net force of zero?
*September 4, 2013*

**Physics**

A hydrogen atom has a diameter of about 10.1 nm. Express this diameter in meters.
*August 26, 2013*

**Introduction to Physical Science**

thank you getting the hang of this
*August 22, 2013*

**Introduction to Physical Science**

How do you calculate the wavelength of the radio waves that are produced is 561 m, when electrons on a radio broadcasting tower are forced to oscillate up and down an antenna 535,000 times each second.
*August 22, 2013*

**economics**

the south african government is not providing enough welfare or subsidies to poor and underpriviledge?
*August 20, 2013*

**Algebra 1-Math**

There's a table that says Company A charges $0.36 plus 0.03. And Company B charges $0.06 per minute. The question Im having problems with are: How long is a call that costs the same amount no matter which company is used? Be sure to show your thinking?
*August 18, 2013*

**vocabulary**

___________definitions are subject to individual interpretation.
*August 12, 2013*

**algebra for business**

As an entrepreneur, there are going to be many decisions that you need to make, such as the price to charge your customers for your goods and services. You have just graduated from college and recently opened a specialty pizza restaurant. Based on surveys conducted in your ...
*August 11, 2013*

**geometry**

A cross country race course on flat ground has runners heading from point A for 3.5 km on a bearing of 047degT to point B. From point B they turn and run for 2.8 km on a bearing of 342degT to point C. They then run back to point A. Determine the Distance from C back to A.
*July 22, 2013*

**Statistics**

If 1000 raffle tickets were sold for a TV prize that is worth $275 and a ticket number is drawn to determine the winner, what is the expected value of the raffle?
*June 27, 2013*

**Trigonometry**

solve for all possible x in [0,2pi): (cscx+2)(cscx-√(2))=0
*June 26, 2013*

**Math**

P(7<x<9) when mu=7
*June 26, 2013*

**Math**

If P(F)=0.3, P(E or F) =.65 and P(E and F)=.15, find P(E)
*June 25, 2013*

**Applied Geometry maths**

How would I find out how far away from the base of the tower she was when she made her first measurement of 15deg20'
*June 19, 2013*

**Geometry**

40. Find the surface area of a conical grain storage tank that has a height of 42 meters and a diameter of 20 meters. Round the answer to the nearest square meter. (1 point) 3,028 m2 3,971 m2 1,357 m2 1,671 m2
*June 11, 2013*

**Writing help!**

1.In the bitter cold, (he, him) and Dad struggled to save the orange crop. My answer:he 2. (Her and me, She and I) have joined the Shutter and Lens. My answer:she and I 3. Phil showed Danny and (I, me) his butterfly collection. My answer:me 4. Bert warned Hank and (I, me) ...
*June 6, 2013*

**Writting**

Imagine that you are an agent who is interested in publishing new authors. Choose any book you like and present the book to a publisher in New York. You want to be the person responsible for putting the book on the shelf. You should convince the publisher that the book is well...
*June 4, 2013*

**Economics **

Explain the difference in prices for each of the following pairs of goods in terms of the laws of supply and demand: (a) natural diamonds and zircons (human-made diamonds), (b) a loaf of bread baked today compared with day-old bread, (c) roses in January and roses in June. ...
*June 4, 2013*

**Writting**

Persuasive Writing Assignment: Imagine that you are an agent who is interested in publishing new authors. Choose any book you like and present the book to a publisher in New York. You want to be the person responsible for putting the book on the shelf. You should convince the ...
*June 4, 2013*

**L.o**

Human or environmental problem under substance abuse. The impacts
*May 26, 2013*

**Algebra**

x-14/x-1=4-2x/x-1
*May 21, 2013*

**math**

oh yeah it says to simplify but I have no clue at all as to how to do this it is a complex number problem I think does anyone know how to do this?(im the one that posted the question)
*May 14, 2013*

**math**

-10i(5+8i)
*May 14, 2013*

**math**

im not really sure but maybe itslike a month because the way I put it in my calculator Is 1200/0.07=17142.85714 but im not good at math so idk. I tried at least
*May 14, 2013*

**science**

what may happen to an ecosystem if nonliving factors change or if one more populations are removed from or added to the ecosystem?
*April 29, 2013*

**Math**

Solve. 10/(3x) + 4/3 = (7 + x)/2x A) x = 1/3 B) x = 17/5x C) x = 1/5 D) x = 1/6 help??
*April 22, 2013*

**math**

a football team gained 12 yards on one play, lost 40 yards on another and gained 34 yards on the last play of the first half. they had already gained 345 yards during the half. what was the total yardage gain for the first half?
*April 21, 2013*

**algerbra**

solve the equation step by step list each step along with the property you used during that step -5*1*11*4
*April 19, 2013*

**math**

what is a verbal rule in math?
*April 16, 2013*

**Math**

me to
*April 16, 2013*

**Life science, business,maths literacy**

if you can change maths lit 2pure you can becm social workr
*April 8, 2013*

**Life science, business and maths literacy**

my name is amanda and am doing grade 12 at school am doing business,life sciences,geography and maths lit so what i want to know is the career that is suitable for these subjects
*April 8, 2013*

**Chemistry**

What mass of sodium oxide is produced from 4.23 grams of sodium and 20 liters of oxygen gas?
*April 3, 2013*

**science**

Do your own work please
*March 28, 2013*

**science**

can you describe the process of cellular respiration.include the words:sugar,energy,carbon dioxide,and water
*March 28, 2013*

**math**

and what would 0.1875 be as a fraction?
*March 26, 2013*

**math**

can someone tell me what would 0.0625 be as a fraction?
*March 26, 2013*

**Chemisry**

Why wouldn't it be KBr? Why are the twos added? How come its not just K + Br ==> KBr since their charges cancel out? Help!
*March 24, 2013*

**AP chemistry **

1). In a titration 20 mL of 0.100 M of HCl is added to 50.0 mL of 0.150 M of ammonia. A). What is the pH of NH3? B). What is the pH of the resulting solution? HELP :(
*March 21, 2013*

**4th grade math**

there are 12 inches in a foot so 14x12=168
*March 19, 2013*

**socials please check**

i believe 5
*March 19, 2013*

**Chemistry**

D the Keq expression of the 2nd one is = to (1/the first Keq expression)^(1/2) so take the answer of the first Keq, 5.4x10^13 and put it in that equation (1/(5.4x10^13))^(1/2)=1.36x10^-7=1.4x10^-7
*March 19, 2013*

**Chemistry**

hydronium is [OH-] ions, so you looking for the Ph that is most basic, which is your highest number 12.6
*March 19, 2013*

**Socials please check my answers**

that's correct
*March 19, 2013*

**math**

1.0425^12? if so the answer is 1.6478
*March 19, 2013*

**12Chemistry**

useing them maybe.. but i dont think they would bond them.. there specialty is teeth.. i only know about pharmacy because thats my intended major next year
*March 19, 2013*

**12Chemistry**

pharmacy, compounding not retail
*March 19, 2013*

**Math**

greater because theoretical would be 40 of 80 since there are 2 choice (heads or tails)
*March 19, 2013*

**math**

# of pennies/# of all coins 12+6+4+8=30 12/30=2/5
*March 19, 2013*

**math ALG 2!**

i've answered like 10 of these for you... you should be able to figure out how this works by the past problems if you really dont understand the process
*March 19, 2013*

**math ALG 2!**

38900
*March 19, 2013*

**math ALG 2!**

x10^6? if so.. 4,250,000
*March 19, 2013*

**math ALG 2!**

scientific notation helps make very large or very small numbers easier. for very large numbers you move the decimal place as many spaces to the left to leave you with one # on the left. you then take the # of spaces you moved and times it by 10^that number. You do the same for...
*March 19, 2013*

**math ALG 2!**

2.1x10^-7
*March 19, 2013*

**math ALG 2!**

7.4*10^6
*March 19, 2013*

**math ALG 2!**

2.3*10^7 you move the decimal place over till you have a number between 1 and 10 you then times it by 10^ number of spaces you moved over
*March 19, 2013*

**Math**

5b+9m=150.5 9b+5m=175.7 if you add them you have one equation. 14b+14m=326.2 14(b+m)=326.2 b+m=23.3 b=23.3-m sub. this back into one the original equations 9(23.3-m)+5m=175.5 209.7-9m+5m=175.5 -4m=-34.2 m=8.55 Plug that into the other equation 5b+9(8.55)=150.5 5b+76.95=150.5 ...
*March 19, 2013*

**chem**

sorry read it wrong, doing this now in chem
*March 19, 2013*

**chem**

PH=-log(ka)+log(base/acid) 4.8=-log(1.8*10^-8)+log(x/.15) 4.8=7.7447+log(x/.15) -2.9447=log(x/.15) .001135=x/.15 x=1.875*10^-4
*March 19, 2013*

**AlgebraB-2**

1. what graph? 3. -2x2-4 is 4 units below -2x2 4. wich func.?
*March 19, 2013*

**Calc**

f(x)=2ln(x^2+3)-x Domain [-3,5] how do i find the absolute maximum value of this?
*March 19, 2013*

**math mrs sue please help **

Find the property of the real numbers which will complete the argument below: 1. Zero is not a positive number. 2. Choose x as the smallest number. 3. The ________ property tells us that _________. 4. Therefore, between x and 0 there will be a third number, smaller than x. 5. ...
*March 15, 2013*

**Algebra 1**

Find the property of the real numbers which will complete the argument below: 1. Zero is not a positive number. 2. Choose x as the smallest number. 3. The ________ property tells us that _________. 4. Therefore, between x and 0 there will be a third number, smaller than x. 5. ...
*March 15, 2013*

**eng1511**

Need points so I can write an argumative essay
*March 11, 2013*

**eng1511**

The sure solution of unemployment is a better quality of education
*March 11, 2013*

**ENG1511**

Where is the passage cos u were suppose to copy n paste it
*March 11, 2013*

**Math**

ln24 - ln6
*March 5, 2013*

**ENG1511**

I wanna write 2 but have no clue where to start
*February 28, 2013*

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