Wednesday

December 17, 2014

December 17, 2014

Total # Posts: 749

**Calculus**

A population of 500 E. coli bacteria doubles every 15 minutes. Use this information to find an expression for this population growth. Using this expression, find what the population would be in 87 minutes. Use an exponential model. so we're supposed to use P(t)= (Po)(e)^kt...
*July 14, 2008*

**URGENT, Calculus!**

A science project studying catapults sent a projectile into the air with an initial velocity of 30 m/s. The formula for distance (s) in meters with respect to time in seconds is s = -4.9t2 + 30t. Find the instantaneous rate of change (and thus the velocity at any time) using ...
*July 10, 2008*

**Calculus**

using the limits formula....
*July 10, 2008*

**Calculus**

For the function f(x) = 1/x^2 find an expression for the slope of a tangent at the point where a = 1 using . Simplify the expression first before substitution.
*July 10, 2008*

**Calculus**

For the function ƒ(x) = x2 find the slope of secants from the point (2, 4) to each of the following points. (3, __ ) (2.5 , __ ) (2.1 , __ ) (2.01, __ ) (2.001, __ ) Using the pattern from question 1, what do you think the slope of a tangent at the point (2, 4) would be? ...
*July 10, 2008*

**Reading**

Which one of the following characters is most in tune with nature?
*June 3, 2008*

**Reading**

1.a
*June 3, 2008*

**world hisory**

where can i find information on Bartholomew gosnald, its for a school project and i have no information what so ever on it
*June 2, 2008*

**social studies**

What is the demand for self-rule and a strong feeling of one's loyalty to one's nation
*May 19, 2008*

**Science**

What does it mean when the book talks about multiplying a force?
*May 10, 2008*

**English**

How do you analyze a poem???...i always have trouble trying to understand the poem...especially metaphors because they have a different meaning then what the words means directly.
*April 14, 2008*

**english**

what is a good parody essay about the red badge of courage.
*April 2, 2008*

**math**

Hi, I had an SAT question of the day that I cannot figure out. The question is: If it is now 4:00 p.m. Saturday, in 253 hours from now, what time and day will it be? (Assume no daylight saving time changes in the period.) The answer choices are: 1. 5:00 a.m. Saturday 2. 1:00 ...
*March 25, 2008*

**math**

tried it. It made me do horible!!!!!!!!
*March 6, 2008*

**math**

Help!!!!! I can't seem to bring my grades up!!! I study and anything! HELP ME!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
*March 6, 2008*

**math**

I am having trouble solving this problem. In 1994, the population of the Las Vegas metropolitan area was about 1,076,000 with an average annual growth rate of 6.5%. Assume this growth rate continues into the future. I have to estimate the population of Las Vegas each year. I ...
*February 27, 2008*

**Algebra**

you can find the slope of the two lines...when it is perpendicular m1*m2=-1 m1=one of the slope m2=the second slope if you multiply the slopes together, you will get -1 if it is perpendicular.
*February 27, 2008*

**Math**

you can use a substraction-or-addition method or substitude method. So... x+y=21 you multiply both side by 3 3x+3y=63 3x+4y=21 --------- then you eliminate one variable you use the subtraction method -y=42 y=-42 then you solve for x by substituting the y x+(-42)=21 x=63
*February 26, 2008*

**English**

i would say...Tubman was like a person from a horse race track yelling and screaming at their voted horse...it so bad though
*February 26, 2008*

**English**

Another one is... Cajoling and encouraging the runaways, Tubman was like... Can you finish the phase?
*February 26, 2008*

**Math**

If a is 5, b is 4, and c is 3, use the equation 2ac + 2bc + 2ab and substitute the variables. So... (2*5*3)+(2*4*3)+(2*5*4) that equals 30+24+40=94
*February 26, 2008*

**English**

Please help me finish the phase... "When she said, "Go on with us or die," Tubman showed that she was as indomitable as..."
*February 26, 2008*

**Math**

How do you solve (a+b)^2 - (a+b)-2?
*February 21, 2008*

**English**

why did Mark Twain use humor in the book TOm Sawyer?
*February 20, 2008*

**English**

work consists of whatever a body is obliged to do and that Play consist of whatever a body is not obliged to do...what does this phase mean?
*February 19, 2008*

**English**

What are some things that is like your heart beat...like a clock but the ticking of clock is too slow...like when you are scared, your heart beats very fast...what can be related to that? Are there any idioms that decribe your heart beats?
*February 12, 2008*

**English**

1. How did the book Tom Sawyer relevant to Mark Twain's real life? 2. How did the boys feel when they were in jackson's island 3. Why did the author put the position of the chapters that way? 4. Descibe all-american boy 5. Descibe the life of boyhood in Tom Sawyer
*February 10, 2008*

**english**

Bo it is not, because we do not know whom we are getting to know, it is out of context.
*January 18, 2008*

**Chemistry**

I meant what is the density of the metal. The last question is reffering to the latest problem with water.. not when it was first stated in the beginning of the problem.
*October 16, 2007*

**Chemistry**

mass of empty flask with stopper = 32.634 g mass of flask with water and stopper = 59.479 g density of the water = 0.9973 g/cm^3 mass of water = 26.845 g volume of water = 26.918 cm^3 the flask is then emptied and an unknown substance is added mass of flask with new liquid and...
*October 16, 2007*

**Physics**

A ball is shot vertically upward from the surface of another planet. A plot of y versus t for the ball is shown in the figure below, where y is the height of the ball above its starting point and t = 0 at the instance the ball is shot. The figure’s vertical scale is set ...
*October 2, 2007*

**Physics**

During the semi-finals of the U. S. Open 2007 Grand Slam Tennis, Venus Williams was in the second set of her match against Justine Henin when her serve was clocked (by a radar gun) at 77 miles per hour. The ball left her racquet horizontally at a height of 2.37 m above the ...
*October 2, 2007*

**science=///**

what are 5 ways in which organisms are similar???
*September 30, 2007*

**Math Word Problem**

I asked my teacher, and my teacher said it had 3 shelves.. A bookcase is to be constructed. The height of the bookcase is 4 feet longer than the lenght of a shelf. If 20 feet of lumber is available for the entire unit (including the shelves, but NOT the back of the bookcase), ...
*August 21, 2007*

**Math Word Problems**

Hi, I am having some trouble with some problems, can you please help. thanxs!!! 1. A car rental agency charges $250 per week plus $0.25 per mile to rent a car. How many miles can you travel in one week for $300? -Would the equation look like: 300= 250x + .25 ? 6. A train ...
*August 18, 2007*

**physics**

A jewel thief decides to hide a stolen diamond by placing it at the bottom of a crystal-clear fountain. He places a circular piece of wood on the surface of the water and anchors it directly above the diamond at the bottom of the fountain, as shown below. If the fountain is x...
*May 16, 2007*

**trigonometria**

halla las ecuaciones de las rectas que satisfecen las condiciones siguientes pasa por (0,2) M=3
*March 28, 2007*

**algebra 1**

-5x+y=-3. 3x-8y=24
*March 7, 2007*

**science**

explain why a substancew with a network structure has a high melting point ? High is a relative term. What is high? coudnt u give me a better response Think what holds a network together? Bonds? Bonds must be broken to melt a solid. thank u
*March 4, 2007*

**science**

describe the difference between a ball-and-stck model and a space-filling model of a compound ? Vanessa--Have you seen a ball-and-stick model and a space-filling model? If so you will know how to answer this. dont give me stupid answers i can on for help not bs
*March 4, 2007*

**worl History**

I'm doing this one project for world history on the BATTLE OF BOUGAINVILLE, and I'm having trouble finding the right information, i can't find the leading military officers from both sides, the axis leader and the alied leader. can somebody help me? http://en....
*February 27, 2007*

**Chemistry**

I need to take some following samples of these: *a hydrocarbon w/a molecular mass greater than 100 g/mo *something w/ L-carvone or D-carvone in it *a non-electrolyte that dissloves in water *something w/a pressure greater than 2.o atom *a proton donor can you help me?? Go down...
*February 4, 2007*

**history**

whta were the three most populous states in 1860? were they northern or southern states? http://www.civilwarhome.com/population1860.htm =)
*February 4, 2007*

**math**

i need help on correcting my work
*January 9, 2007*

**math**

how can i get 78 cents by only using 7 coins? 50 + 10 + 10 + 5 + 1 + 1 + 1 There are still 50 cent pieces in circulation
*December 28, 2006*

**Plz help me..just one MATH question**

The number 1 is both the square of an integer and the cube of an integer. What is the next larger interger which is both a square and a cube of a positve integer. plz help, the only number i can think of was 0 but its smaller than one. what is the erroron the verdfind it and ...
*November 7, 2006*

**MaTH**

$89.00MIN/HOUR=$_____/SECONDS $5340.00
*October 22, 2006*

**Math: Direct Variation**

i dont undestanding how solve direct variation
*September 21, 2006*

**MATH**

MY DAUGHTER IS IN 3RD GRADE, AND I NEEDED HELP ON A QUESTION, STEVE'S BIRTHDAY IS BETWEEN MAY 23. THE DATE OF HIS BIRTHDAY IS NOT AN ODD NUMBER. THE SUM OF THE DIGITS IS 9. WHEN IS STEVE'S BIRTHDAY?? PLEASE HELP ME WITH THE ANSWER I DO NOT UNDERSTAND. 28b=-131.6 I ...
*September 6, 2006*

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