Friday

August 26, 2016
Total # Posts: 1,904

**math**

You toss a polybutadiene rubber ball 40 feet straight up from ground level. Each time it bounces, it rebounds 2/3 of the distance from which it fell. It continues bouncing indefinitely. How far does it travel before it comes to rest?
*July 9, 2009*

**Math**

The points (4, –5) and (– 4, 1) are endpoints of a diameter of a circle. (a) Find the center of the circle. (b) Find the length of the radius of the circle. (Note that this is a distance.) Give the exact answer. Show work. (c) State the equation of the circle (in ...
*June 24, 2009*

**Algebra**

Thanks!
*June 22, 2009*

**Algebra**

How can algebra be used to solve this problem? The boy solved 10 problems correctly at 8 cents a problem for a total of 80 cents, and 16 incorrectly at the cost of 5 cents for a total of 80 cents. Therefore, neither the boy nor his father owed each other anything at the end of...
*June 22, 2009*

**Algebra**

Why would you say it was 4? This is what I thought to.
*June 17, 2009*

**Algebra**

Find the difference quotient: f(x+h)-f(x)/h for f(x) = 4x-9 and simplify.
*June 17, 2009*

**Algebra**

Now I will work on the distance and slope parts. Hopefully they will be correct to!
*June 13, 2009*

**Algebra**

oops I misplaced the decimal. So yea (6,0.5) is the solution I came up with.
*June 13, 2009*

**Algebra**

I think I figured it out. The answer can contain a fraction along with whole numbers. So i guess the mid point would be (6,.05) correct?
*June 13, 2009*

**Algebra**

(x1 + x2)/2, y1 + y2)/2 = 3+9/2 = 12/2 = 6 -1+2/2 = 1/2 = .05 This is what I got for the mid point. is this correct? I got 6 for the first set of numbers, and .05 for the second. How do I determine the mid point?
*June 13, 2009*

**Algebra**

Consider the points (3, –1) and (9, 2). (a) State the midpoint of the line segment with the given endpoints. (b) Find the distance between the points. Show some work. Give the exact answer (involving a radical), and also an approximation to three decimal places. (c) Find ...
*June 13, 2009*

**college interview question**

can i just say i tryed my best in everything i could so i dont regret it
*June 8, 2009*

**college interview question**

how will you answer this is i dont regret something Is there anything that you regret doing (or not doing) during high school?
*June 8, 2009*

**ecology**

I am not very good in science, and math. However, I do very well in english, writing, puncuation, and grammar. Here is my question. Do you believe humans can harvest forest resources in an enviromentally friendly way? Or, should national forest be left in their natural state ...
*June 6, 2009*

**chemistry**

In general, which reaction(forward, reverse, or neither) is favored if the value of K at a specified temperature is a. equal to 1? b. very small c. very large
*June 5, 2009*

**chemistry**

Which species are left out from the Keq expression, and why?
*June 3, 2009*

**Normal Public High School Chemistry**

Please assist me in answer this question please show me all the formulas used and the units and how to convert them if needed. Thank You. If the half-life of Ba (140, 56) is 12.75 dyas, how many atoms of (140, 56) Ba will be left after 9 weeks if there were initially 2.4 mol ...
*June 3, 2009*

**sat scores**

okay thanks
*June 1, 2009*

**sat scores**

What does a 1426 mean on the SAT as a score is it good bad or in between?
*June 1, 2009*

**chemistry**

unsaturated
*May 29, 2009*

**chemistry**

i think it is saturated
*May 29, 2009*

**chemistry**

so it is unsaturated
*May 29, 2009*

**chemistry**

If 20 g KCL is dissolved in 100g of water at 20 degrees C, is the solution unsaturated, saturated, or supersaturated?
*May 29, 2009*

**chemistry help**

411 grams
*May 28, 2009*

**chemistry help**

so what do i write as the answer
*May 28, 2009*

**chemistry help**

what mass of ammonium chloride can be added to 100g of water at 20 degrees C before the solution becomes saturated
*May 28, 2009*

**chemistry**

need help please???
*May 27, 2009*

**chemistry**

what mass of ammonium chloride can be added to 100g of water at 20 degrees C before the solution becomes saturated
*May 27, 2009*

**Language arts**

Like i.e. the lions were his favorite because they had beautiful manes and eyes and the giraffes were neglected because they had long necks and spotted fur.
*May 25, 2009*

**Language arts**

That sounds like a good start. You could say that maybe the zoo keeper had a favorite animal [to represent the "perfect" race] and that he neglected the other animals and wouldn't let them play with the other animals [those captured in concentration camps] ...
*May 25, 2009*

**Statistics**

For the gene pair that determines eye color, each gene trait may be one of two types: dominant brown (B) or recessive blue (b). A person possessing the gene pair BB or Bb has brown eyes, whereas the pair bb produces blue eyes. a) Suppose both parents of an individual are Bb. ...
*May 25, 2009*

**looking for college scholarships**

ookay
*May 22, 2009*

**looking for college scholarships**

Do you know of any that you applyed for?
*May 22, 2009*

**looking for college scholarships**

I am a junior in high school and I am in the process of trying to find scholarships that I can apply for right now at the moment. I am trying to start early as I can. Thanks!! If you can help me find scholarships and or grants. But i say absolutely no loans at all. :)
*May 22, 2009*

**Science - Weather**

Describe what would happen to the temperature on Earth if the amount of energy reflected back to space a) increased to 80% b) decreased to 5%
*May 21, 2009*

**chemistry help**

can you tell me what to write
*May 20, 2009*

**chemistry help**

What mass of ammonium chloride can be added to 100 g of water at 20 degrees C before the solution becomes saturated?
*May 20, 2009*

**Question ! :)**

I was thinking of things like Myspace and how putting your personal information out there can put your life in jeopardy. Also, if you save something to a hard drive on a computer open to other people, then anyone can see your information and do whatever they want with it. I&#...
*May 19, 2009*

**Question ! :)**

Why is it important to use caution before putting any personal information on a computer? (example(s) required) I think everyone knows the general idea to the answer to this question but this is my final exam question...so it has to be thorough. Any specific ideas for an ...
*May 19, 2009*

**chemistry**

a polymer is a molecule with repeating units usually joined with covalent chemical bonds. 2 examples of naturally occurring polymers are proteins & starches.
*May 19, 2009*

**pre calc need help**

Find the indicated function value. Do not use a calculator. tan 180 degrees
*May 18, 2009*

**chemistry help asap**

explain how paper chromatography separates the components in a solution
*May 18, 2009*

**Math**

Please explain ... What percent of 60 is 72? 35 is what percent of 20? Thank you!
*May 17, 2009*

**physics**

I have a few questions that i am not too sure how to figure out... 1- as a racing car zooms by you, its pitch decreases by 20%. If the speed of sound is 345m/s, how fast is the car travelling? 2-a person has a threshold of hearing of 5db. another person has a threshold of ...
*May 17, 2009*

**12th grade- Trigonometry**

Find the exact value of each expression Cos^-1(0) Tan^-1 sqrt(3)/3 Sin^-1(1) Since the expressions are capitalized, I'm not sure if I have to do anything different. Any help is appreciated.
*May 14, 2009*

**Math**

Please explain how I write this into a decimal and as a fraction in simplest form: 94.6% Thanks!
*May 10, 2009*

**Maths**

What are like terms
*May 7, 2009*

**Maths**

What are lke terms in formula
*May 7, 2009*

**newletters ideas**

okay great
*April 28, 2009*

**newletters ideas**

for all more like
*April 28, 2009*

**newletters ideas**

what is a great newletter topic that I can do on about school or classroom?
*April 28, 2009*

**Math**

How do I figure out what is greater 67.5% or 135/200 ? Thanks!
*April 27, 2009*

**exponents**

I need help with a few problems... (4^3 x 5^-2)(5^4 x 4^-5)/ 4^-3 x 5^3 and (2^x+2) - (2^x+5) = -7 please help!:)
*April 5, 2009*

**physics**

what can be said about the speed of an object if the net work done on that object is zero?
*April 2, 2009*

**Math**

Use synthetic division to show that x is a solution of the third-degree polynomial equation, and use the result to factor the polynomial completely. List all the real zeros of the function. x^3 - 28x - 48 = 0 x=2 I have no idea how to start this problem!!
*April 1, 2009*

**Science - Biology**

Please can someone help me! I've got to do a biology experiment to Investigate the relationship between reaction temperature and the effectiveness of action of the enzyme amylase on starch. I really dont know what it is all about pls someone help :)
*March 29, 2009*

**Math:Evaluate Expression**

2.4?
*March 25, 2009*

**Math:Evaluate Expression**

I understand now. I think our messages were overlapping. Thank you!
*March 25, 2009*

**Math:Evaluate Expression**

So, 12 divided by 3, minus 6.4?
*March 25, 2009*

**Math:Evaluate Expression**

I'm not sure I understand.
*March 25, 2009*

**Math:Evaluate Expression**

k/3 - 6.4 for k=12 Thank you!
*March 25, 2009*

**Math:Evaluate Expressions**

7.8?
*March 25, 2009*

**Math:Evaluate Expressions**

e/3-2x3 for e=41.4 Please explain. Thank you!
*March 25, 2009*

**6th grade mah**

How do I simplify 28% of 64?
*March 24, 2009*

**english**

What are some verbal techniques?
*March 21, 2009*

**History**

How did life in the British North American colonies contribute to the creation of a unique American identity? What are some examples of this?
*March 18, 2009*

**English**

what are written techniques?
*March 17, 2009*

**British Lit**

What do we learn about Sir Gawain's character from his speech in line 343-365?
*March 14, 2009*

**Chem**

Describe the 6 changes of state that substances might undergo in terms of appearance and energy transfer.
*March 10, 2009*

**physics**

At what distance would the repulsive force between two electrons have a magnitude of 8.50 N? I have no idea how to do this problem... can someone help me please... 3x10^-4/8.50?
*March 9, 2009*

**Science**

if every single person on this planet (about 5x10^9) could eat 1 pizza every second, how many years would it take them to eat 1 mole of pizza. 1 mole= 6.02x10^23
*March 4, 2009*

**physics**

A solid aluminum ingot weighs 88.0 N in air.What is its volume?The ingot is suspended from a rope and totally immersed in water. What is the tension in the rope (the apparent weight of the ingot in water)? To find the volume would i do density/specific gravity of aluminum?
*March 1, 2009*

**language- swedish**

i really would like to learn swedish. if anyone could help me, id really be greatful and in return, i could help with english or german. thankyou!
*February 25, 2009*

**physics**

25cm is the other operator
*February 23, 2009*

**physics**

You are designing a hydraulic lift for an automobile garage. It will consist of two oil-filled cylindrical pipes of different diameters. A worker pushes down on a piston at one end, raising the car on a platform at the other end. To handle a full range of jobs, you must be ...
*February 23, 2009*

**Physics**

Suppose you viewed a movie that was running backwards. You would see lots of odd things happen: streams would flow uphill, a diver would emerge upwards and go back to the diving board etc. If these backward moving events actually happened in nature, which principle or ...
*February 20, 2009*

**Maths**

How do I work out how much is left of something after a percent has been taken. For example: $50 has 25% taken of it how much of the $50 is left?
*February 18, 2009*

**biology**

Why are coral reefs generally limited in distribution to shallow marine waters?
*February 15, 2009*

**Math**

Yes, 20/24. Makes sense. Thank you!
*February 12, 2009*

**Math**

please explain to me how to figure out what fraction is greater. ex. 5/6 __ 1/8
*February 12, 2009*

**math**

unscamble the word: ripem , phase , and clamidd into math words
*February 9, 2009*

**pre calc**

okay thanks
*February 9, 2009*

**pre calc**

yes to change it to y=mx+b form
*February 9, 2009*

**pre calc**

how do you put these in y=mx+b form 3x+5y=8 16-5x=2y
*February 9, 2009*

**english need help asap**

3. d 4.b
*February 9, 2009*

**english need help asap**

* 3. Which phrase from Song of Myself, Number 52 is a simile? Which phrase from Song of Myself, Number 52 is a simile? a. “He complains of my gab and my loitering.” b. “I shake my white locks at the runaway sun.” c. “If you want me again look ...
*February 9, 2009*

**english**

6. c
*February 9, 2009*

**english**

can you help with these 5. Free verse is best described as — Free verse is best described as — a. poetry written without regular rhyme schemes and meter b. words and expressions not meant to be taken literally c. clues that hint at what will happen later on in...
*February 9, 2009*

**english**

1. c 2.c
*February 9, 2009*

**algebra need help**

Evaluate each expression. 3x^2-2x+1 if x=5 3a^2b^3 if a=2, b=-3
*February 8, 2009*

**algebra**

1. a number increased by 21 is 28. find the number 2. a number decreased by 12 is equal to 30. find the number. 3. 8 less than a number is 15. fid the number
*February 7, 2009*

**science**

what substance do you use to grow a virus in a lab
*February 7, 2009*

**chemistry**

they are not i have no idea where to start.
*February 6, 2009*

**chemistry**

Balance the following equations? Fe2O3 + 3H2 → 2Fe + 3H2O 4NH3 + 5O2 → 4NO + 6H2O 2Al + 6HAsO3 → 3H2 + 2Al(AsO3)3
*February 6, 2009*

**stats**

How would r change if researchers had recordered the proportions?
*February 6, 2009*

**stats**

Often the percent of an animal species in the wild that survive to breed again is lower following a successful breeding season. This is part of nature‘s self- regulation, tending to keep population stable. A study of merlins (small falcons) in northern Sweden observed the...
*February 5, 2009*

**stats**

Often the percent of an animal species in the wild that survive to breed again is lower following a successful breeding season. This is part of nature‘s self- regulation, tending to keep population stable. A study of merlins (small falcons) in northern Sweden observed the...
*February 5, 2009*

**English**

Mark Twain's skill as a humorist shows in Chapter XI. He uses a play on words in this chapter. What is it?
*February 4, 2009*

**chemistry**

Solid silicon and solid magnesium chloride forms when silison tetrachloride gas reacts with magnesium metal. Write a word equations and an ublanced formula equation. Include all of the appropriate notations.
*February 4, 2009*