Sunday

February 7, 2016
Total # Posts: 2,328

**Chemistry**

A certain brand of iron suppluement contains FeSo4 7H20 with miscellaneous binders and fillers suppose 22.93 mL of KMnO4 solution used in the question above are needed to oxidize Fe2+ to Fe3+ in a 0.4927g pill. What is the mass percent of FeSo4 7H20(molar mass 278.03 g/mol) in...
*November 2, 2010*

**CHEMISTRY**

Thanks
*November 1, 2010*

**precalc**

If a savings fund pays interest at a rate of 10% per year compounded semiannually, how much money invested now will amount to $5000 after 1 year? Please round the answer to the nearest cent.
*October 31, 2010*

**Physics**

Your car is stuck in the mud and two friends are helping you. One is pulling on your car with a force of 370 N at a 40 degree angle and the other is pulling with a force of 450 N at a 30 degree angle. A force of 725 N is required to remove the car. Is the car still stuck? ...
*October 29, 2010*

**1st grade**

how are elephant and dinosaur and whales are alike
*October 27, 2010*

**Science **

Cannabis tricks nerves in the brain into sending distorted messages. Which of the drugs effects on the body could this explain??? Helpp!
*October 22, 2010*

**Physics**

What is the equation for average velocity given x1 (initial distance), x2 (final distance), t1 (initial time) and t2 (final time)?
*October 21, 2010*

**pre calc trig check my work please**

sin x + cos x -------------- = ? sin x sin x cos x ----- + ----- = sin x sin x cos x/sin x = cot x this is what i got, the problem is we have a match the expression to the equation work sheet and this is not one of the answers. need to figure out what im doing wrong so i can ...
*October 20, 2010*

**3rd grade math**

use any method estimate 667-651
*October 20, 2010*

**3rd grade math**

use any methond to eastimate each difference
*October 20, 2010*

**Math**

Meg wants to install square tiles in a rectangular room. How can identifying common factors help her decide if any tiles will need to be cut? Use numbers to help you explain. And if the rooms aren't the size of the tiles then what do I do?
*October 16, 2010*

**Food**

main nutrient suppkied by meat and alternatives is carbohydrates?
*October 15, 2010*

**Food**

Main mineral supplied by dairy products?
*October 15, 2010*

**Geography/History**

The correct answers are 2,3 and 5. Affected Nations throughout the world. Reduced the number of communist nations in the world. Changed boundaries in Europe.
*October 15, 2010*

**Business**

How can lean manufacturing and near-sourcing help a company gain a competitive edge and prepare for the future?
*October 14, 2010*

**pleaese help math**

12p^2q|7mn^3|3p^3q^3|21n^4
*October 13, 2010*

**math**

-3v+3 _______ 6v+5 is to make sense, the values that v can take must be restricted. State the restriction on v
*October 13, 2010*

**math 208**

21n^4 ______ 5x^3y^4 _______ 7mn^2 _______ 20x^2y
*October 13, 2010*

**8th grade math**

its 2/3
*October 13, 2010*

**math 209**

machine produces 192 bolts in 20 minutes. At the same rate, how many bolts would be produced in 50 minutes? thank you
*October 13, 2010*

**math 209**

A certain medicine is given in an amount proportional to a patient's body weight. Suppose a patient weighing 108 pounds requires 135 milligrams of medicine. What is the weight of a patient who requires 260 milligrams of medicine?
*October 13, 2010*

**business**

Today's progressive managers:
*October 10, 2010*

**math**

2" diameter cardboard core
*October 8, 2010*

**math**

what is the formula to estimate the amount of fabric that is on a 2" cardboard core?
*October 8, 2010*

**Physics**

23.3
*October 8, 2010*

**Discreet Mathematical Structures**

Use proof by contraposition to prove the following statement: If A is the average of two positive real numbers then one of the two numbers is greater than or equal to A. Proof. Domain: positive real numbers P: A=(x+y)/2 Q: x is greater than or equal to A or y is greater than ...
*October 7, 2010*

**physics **

A baseball player hits a baseball (m = 0.145 kg) The ball is initially traveling horizontally with speed of 36 m/s. The batter hits a fly ball as shown, with a speed vf = 54 m/s. (a) What is the magnitude and direction of the impulse imparted to the ball? (b) If the ball (m = ...
*October 5, 2010*

**calculus**

can someone check these for me: 18. All edges of a cube are expanding at a rate of 6 cm per second. How fast is the volume changing when each edge is a) 2 cm and b) 10 cm. a)72 cm^3/sec b)1800 cm^3/sec 20. The formula for the volume of a cone is v=(1/3)(pi)(r^2)h. Find the ...
*October 5, 2010*

**Calculus**

The answer is f'(x)=2((x^2+3)^5+x)[5(x^2+3)^4(2x)+1] I don't understand where the +1 at the end comes from
*October 3, 2010*

**Calculus**

find the derivative of f(x)=((x^2+3)^5+x)^2 using the chain rule. I know that I would start with f'(x)=2((x^2+3)^5+x) but I don't know how to do the rest
*October 3, 2010*

**physics**

Using the equation provided we can just substitute our knowns and solve for a. (15m/s)^2=(0m/s)^2+2a(1m) a=112.5 m/s^2 F=ma F=(60kg)(112.5m/s^2) 6750 N
*October 2, 2010*

**math**

Estimate f′(−3) where f(x) = x^3 + 8x^2 − 10x − 1 to within one decimal place by using a small enough interval. f′(−3) ≈
*October 1, 2010*

**math**

(i) Compute the average rate of change over the shortest interval to the left of the point of interest (for instance, for the interval from 6 to 9). (ii) Compute the average rate of change over the shortest interval to the right of the point of interest (for instance, for the ...
*October 1, 2010*

**business**

free cash flow
*September 28, 2010*

**descriptive essay**

bobpursley- The essay has to describe a place. The thesis has to have a key term that refers to the place we are describing.
*September 27, 2010*

**descriptive essay**

Thesis statement: My bedroom, which I share with my boyfriend and my daughter, is unbearably crowded. The professor wants one paragraph describing something to contrast to our main idea. That paragraph is about my mom's house. The rest of the essay is describing my bedroom.
*September 27, 2010*

**descriptive essay**

This is my introduction paragraph for a descriptive essay. My professor told me that the thesis was a fact, not an idea. Is there a way that I can reword it to make it an idea? Though being a parent is one of the greatest joys of life, teen parenting comes with a few ...
*September 27, 2010*

**calc**

Thats what I got whenever I simplified it
*September 27, 2010*

**calc**

Find the derivatives of the following functions using the differentiation rules. f(x)=(x^3-2x^2+x+1)(sqrt(x)-3x+9) I did: f'(x)=[x^3-2x^2+x+1][(1/2x^(-1/2)-3]+[x^(1/2)-3x+9][3x^2-4x+1] which I got to be [-12x^3+(7/2)x^(5/2)+46x^2-5x^(3/2)-42x+(3/2)x^(1/2)+6]/[2x^(1/2)] I ...
*September 27, 2010*

**Algebra 2**

How do you factor u^2 - v^2 + 2v + 1?
*September 26, 2010*

**Geometry**

I have this much so far (1+x)/9 = 2/5 or x = 13/5 = 2.6 ft I am unsure of how to work out the rest of the problem. A wooden board is placed so that it leans against a loading dock to provide a ramp. The board is supported by a metal beam perpendicular to the ramp and placed on...
*September 26, 2010*

**Geometry**

PLEASE! Someone help me with geometry!? A wooden board is placed so that it leans against a loading dock to provide a ramp. The board is supported by a metal beam perpendicular to the ramp and placed on a 1 ft. tall support. The bottom of the support is 9 feet from the point ...
*September 22, 2010*

**english**

read the following sentences and underline each word or phrase that signals a comparison or contast clue. circle comparison or contrast, depending on the clue. then write the meaning os each italicized word. 1.) We thought we were seeing the real painting, but it turned out to...
*September 22, 2010*

**PHYSICS**

Taylor Swift leaves Philadelphia for a concert in Dallas. Kellie Pickler leaves at the same time, but in a different tour bus. After 2 hours, Taylor's bus has traveled 50% further than Kellie's bus. If Taylor's bus is going 30mph faster than kellies's bus, how ...
*September 21, 2010*

**PHYSICS**

Thank you
*September 21, 2010*

**PHYSICS**

The roadrunner leaves Pittsburgh at 7:15 in the morning at 10mph. He is headed toward Cleveland which is 131 miles away. If the coyote leaves 15 minutes later, what speed will he have to travel to get there at the same time as the road runner?
*September 21, 2010*

**Algebra**

you're welcome!
*September 21, 2010*

**Algebra**

I found this example on purplemath You coul use this and apply knowledge. This is the original equation. x2 + 6x – 7 = 0 Move the loose number over to the other side. x2 + 6x = 7 Take half of the x-term (that is, divide it by two) (and don't forget the sign!), and ...
*September 21, 2010*

**Physics**

The roadrunner leaves Pittsburgh at 7:15 in the morning at 10mph. He is headed toward Cleveland which is 131 miles away. If the coyote leaves 15 minutes later, what speed will he have to travel to get there at the same time as the road runner?
*September 21, 2010*

**Physics**

Two cars start from the same place at the same time. After two hours, one car has traveled 30% farther than the other. If one car's speed is 20mph larger than the other car's speed, what are teh speeds of the cars? Solve algebraically
*September 19, 2010*

**algegra**

Volume= length *width*height. Area is length*width. Therefore to find the volume you just need to multiply 56*6 which is 336
*September 19, 2010*

**biology**

energy that is lost at each trophic level of an ecosystem is replenished by????
*September 19, 2010*

**calculus**

how did you get all of those x's with exponents?
*September 19, 2010*

**calculus**

sorry i should have put lim tan(x)/x
*September 19, 2010*

**calculus**

I broke that down into the lim of sinx/(xcosx)
*September 19, 2010*

**calculus**

lim as x approaches 0 of tanx/x
*September 19, 2010*

**Calculus**

no its a 2.
*September 18, 2010*

**Calculus**

We don't start derivatives until the next chapter. I'm just don't understand how you can determine each side of a limit seperately without using a graph or chart.
*September 18, 2010*

**Calculus**

But now if it does not exist we have to go back and look at the limit as the function approaches from the left and from the right and describe the behavoir of the function for example if it approaches infinity or negative infinity. I don't know how to do that analytically ...
*September 18, 2010*

**Calculus**

Our professor wants us to evaluate the limits analytically without using a table or a graph, and if it doesn't exist we must describe the behavor near the limit point. I'm not sure how to evaluate each side of a limit seperately without looking at a table or graph. ...
*September 18, 2010*

**Algebra 2**

thanks
*September 18, 2010*

**Algebra 2**

Is the solution to 0 ≤ |4u - 7| u ≥ 7/4?
*September 18, 2010*

**Algebra 2**

-(y+3) = 2y - 5 -y-3 = 2y-5 -3y = -2 y = 2/3 Is this how to solve the equation?
*September 18, 2010*

**Algebra 2**

What two equations can you write from |y+3|+5=2y? I know one is y+3=2y-5, which becomes 8. Is there another equation possible?
*September 18, 2010*

**Algebra 2**

thanks
*September 18, 2010*

**Algebra 2**

|2(-3)| + 3 = -3 9=-3 ?
*September 18, 2010*

**Algebra 2**

Is it possible to solve |2x| + 3 =x? I got x= -3, but it doesn't seem to work when you plug it into the original equation to check it..
*September 18, 2010*

**french**

Isn't the feminine form without the s, like noire?
*September 18, 2010*

**Algebra II**

What's the solution for -5 < 1 - 2k < 3? Is it 3 > k >-1 or is it -1 < k < 3? I'm not sure if you have to switch the order of the numbers also when you're dividing it by a negative number..
*September 15, 2010*

**calculus**

Find the limit if it exists. The limit of (sqrt(x+1)-2)/(x-3) as x tends to 3. The limit of (sqrt(x+5)-sqrt(5))/x as x tends to 0
*September 12, 2010*

**Physics**

kg for the 4 x 10^-26
*September 10, 2010*

**Physics**

How many uranium atoms are there in 8.4 g of pure uranium? The mass of one uranium atom is 4 x 10^-26
*September 10, 2010*

**Math - factoring**

Solve by factoring: 1.) x^2 - x - 12 = 0
*September 9, 2010*

**Geometry**

A wooden board is placed so that it leans against a loading dock to provide a ramp. The board is supported by a metal beam perpendicular to the ramp and placed on a 1 ft. tall support. The bottom of the support is 9 feet from the point where the ramp meets the ground. The ...
*September 9, 2010*

**algebra**

if i had 8765.00 in my bank and i made 9006.04 in twelve months with out puting any money in the bank what is the intrest rate that i have
*September 8, 2010*

**Biology**

Which of the following is a polymer of an amino sugar? a.) cellulose b.) chitin c.) glycogen d.) starch
*September 7, 2010*

**english**

What are some colorful, playful phrases from Angela's Ashes by Frank McCourt like, "stuff his gob with toffee galore" " 'tis raining abroad, pelting out of the heavens" and "legless with the sherry". And please say in what chapters they are?
*September 5, 2010*

**Math - Solving Graphically**

1. 8 + 7x =2x² I used my calculator to graph this and got x is about 4.41 and -.904 2. 1/3x² - 15 = 0 Again, I graphed on my calculator and got x is about 6.70 and -6.70 Are these answers accurate and is there another way to solve?
*September 1, 2010*

**psychology**

How has early memory research concerning the growth of cognitive perspectives in psychology changed over the course of the 20th century?
*August 28, 2010*

**Geometry**

A wheel with a radius of 13 rolls along level ground and makes 4 1/2 revolutions per second. Assuming the circumference to be 3.1416 times the diameter, how far does the wheel travel in 8 seconds?
*August 23, 2010*

**chemistry**

HAHAHA THAT IS SO EASY HAHAHA
*August 15, 2010*

**Physics**

The flywheel of a steam engine runs with a constant angular speed of 321 rev/min (in the counterclockwise direction). When steam is shut off, the friction of the bearings stops the wheel in 1.9 h. (a) What is the constant angular acceleration, in revolutions per minute-squared...
*July 27, 2010*

**math**

The winning time int he womens Olympic 200 meter dash w is a function of the year x in which the event was run, starting with 1948 and is given by the equation w= f(X)= -0.0661X+152.8 A. PREDICT THE WINNING TIME FOR THE 1988 OLYMPICS. ( THE ACTUAL TIME WAS 21.34 SECONDS) B. ...
*July 26, 2010*

**Finance**

Bond X is a premium bond making annual payments. The bond pays an 8 percent coupon, has a YTM of 6 percent, and has 13 years to maturity. Bond Y is a discount bond making annual payments. This bond pays a 6 percent coupon, has a YTM of 8 percent, and also has 13 years to ...
*July 23, 2010*

**Physics-Gravity**

A 17.0-kg satellite has a circular orbit with a period of 2.31 h and a radius of 9.10×106 m around a planet of unknown mass. If the magnitude of the gravitational acceleration on the surface of the planet is 8.10 m/s2, what is the radius of the planet?
*July 17, 2010*

**Physics-Gravity**

then how do i get the altitude after i solve for r subtract the radius of pluto?
*July 17, 2010*

**Physics-Gravity**

A orbiting satellite stays over a certain spot on the equator of (rotating) Pluto. What is the altitude of the orbit (called a "synchronous orbit")? Do I use T^2=4pi^2/GM x r^3?
*July 17, 2010*

**PSYCHOLOGY**

A. some undiscovered third variable that is independent of nature and nurture has the largest influence on development
*July 17, 2010*

**Math**

If 7y+9 represents an odd integer, which of the following represents the next smallest odd integer? a. 7(y-2)+1 b. 7(y-2) c. 7(y+3) d. 7(y+2) e. 7(y+1)
*July 6, 2010*

**MATH**

IF XYZ AUTO CO SOLD 23,000 VEHICLES IN 1999, HOW MANY WERE SUV'S? IF 7,650 TRUCKS WERE SOLD IN 1999,HOW MANY TOTAL VEHICLES WERE SOLD IN 1999? IF 3,750 2-DR CARS WERE SOLD IN 1999, THEN HOW MANY 4-DR CARS WERE SOLD IN 1999? THE FOLLOWING INFO APPEARED IN A PIE CHART - 4-DR...
*July 6, 2010*

**English**

When a character has an aside, he or she is speaking dirextly to another character. True or False? I know that aside is something a character says to either the audience or another character, which the rest of those on stage are not supposed to hear. So is it False? Just ...
*July 3, 2010*

**Chemistry**

also, the Molarity of EDTA was determined to be .0404
*July 1, 2010*

**Chemistry**

Hello, we recently did a lab in our chemistry class to analyze an Unknown amount Calcium Carbonate which was titrated with EDTA. Our titration results were: mass of the unknown CaCO3 was 0.172 g and the mL of EDTA added was 30.7. How do I find the percent mass of Ca?
*July 1, 2010*

**physics**

A bothersome feature of many physical measurements is the presence of a background signal (commonly called "noise"). In Part 2.2.4 of the experiment, some light that reflects off the apparatus or from neighboring stations strikes the photometer even when the direct ...
*June 29, 2010*

**English**

1. Reviewing word choice is a good strategy for the Proofreading phase of the Writing Process. True or False? I think it is False as reviewing word choice should be in the revision phase, right? 2. It is easier to determine the form of one's writing if the purpose of ...
*June 27, 2010*

**communication**

Repeating in your own words the verbal content of the critic's message is: paraphrasing. checking for feelings. checking for inferences. buying time with limited agreement.
*June 24, 2010*

**communication**

The emphasis given to one or more words in a sentence is: volume. stress. pitch. tone of voice.
*June 24, 2010*

**communication**

Which of the following is a characteristic of communication in high-context cultures? Written agreements are binding. There is reliance on nonverbal signs to communicate. Oral agreements are not binding. There is a preference for direct communication.
*June 24, 2010*

**literature**

i need to know all of the syllables in words
*June 14, 2010*

**math/Probability**

what is the probability of rolling a sum that exceeds 4 with two dice
*June 11, 2010*