Monday
August 31, 2015

Posts by sammy


Total # Posts: 522

AP Biology
In 1918 a particularly virulent strain of influenza (an RNA virus) wiped out millions of health humans in the prime of their lives. Epidemiologists fear that such a super bug could revisit us in the future. And thus there was quest to find samples of the virus, and make a ...
March 28, 2012

Math
A company that produces a particular machine component has 3 factories, one each in Buffalo, Detroit, and Pittsburgh. 39% of the components produced come from the Buffalo factory, 36% of the components come from the Detroit factory, and 25% of the components come from the ...
March 22, 2012

Algebra 2
Write a rule for the nth term of the arithmetic sequence. ( I'm not sure how I'm suppose to write the numbers below a :C so bare with me ) a(2) = - 28, a(20) = 52 I used the formula a(n) = a(1) + ( n-1)d a(20) = a(1) + (20-1)d > 52 = a(1)+19d a(2) = a(1) + (2-1)d &...
March 15, 2012

Math(alg2)
solve the exponential equation 5(2)^2x - 4 = 13 thanks
March 13, 2012

science
a car starts from a stopped position at a red light at the end of 30 second its speed is 20 meters per second what is the acceleration of the car
March 2, 2012

chem
How much heat is required to heat 0.1 g of ice at −30 degrees C to steam at 100 degrees C
March 1, 2012

chem
The standard molar heat of vaporiza- tion for water is 40.79 kJ/mol. How much energy would be required to vaporize 2.54 ×1010 molecules of water? Answer in units of kJ
March 1, 2012

physics
If a wheel 211 cm in diameter takes 2.25 s for each revolution, find its period. T=?s
February 18, 2012

Chemistry
Heating an ore of antimony (Sb2S3) in the presence of iron gives the element antimony and iron(II) sulfide. Sb2S3(s) + 3Fe(s) ---> 2Sb(s) + 3FeS(s) When 15.0 g Sb2Sb3 reacts with an excess of Fe, 9.84 g Sb is produced. What is the percent yield of this reaction?
January 25, 2012

Spanish-9th gradePlease check
Thank you
January 25, 2012

Spanish-9th gradePlease check
Thank you very much
January 25, 2012

Spanish-Please check SraJMcGin if possible-9th gradePlease check
I'm not sure if SraJMcGin is still answering questions but I would appreciate her checking this if she still does Thank you
January 25, 2012

Spanish-9th gradePlease check
I have a question-I have to write the verb correctly for these two sentences Did I do them correctly? 1. nosotros/lavarnos Nosotros nos lavamos. 2. yo/ponerme Yo me pongo.
January 25, 2012

PreCal
Projectile Motion: An object is propelled upward at an angle theta, 45 degree < theta <90 degree, to the horizontal with an initial velocity of v0 feet per second from the base of an inclined plane that makes an angle of 45 degree with the horizontal. If air is ignored, ...
January 18, 2012

PreCal
Angel of Elevation: You are skiing down a mountain with a vertical height of 1500 feet. The distance from the top of the mountain to the base is 3000 feet. What is the angle of elevation from the base to the top of the mountain? Traveling at 25 miles per hour, how long does it...
January 18, 2012

English
Connections does not give you enough resources and their lessons you pull up and a joke. they aren't even that good and informative. Everything is click here go there ad half the time it doesn't work. I hate not having an actual book in front of me. Not digging ...
January 9, 2012

spanish
Adonde vas despues de comer?
January 6, 2012

Economics
so D?
December 4, 2011

Economics
If the government announced the economy is headed into an expansionary period of rising real GDP and prices, businesses would most likely respond by: a. lowering wages so that they could afford to hire more workers b. dismantling some of existing production facilities c. ...
December 4, 2011

Mnagemeny
I need assistance with a problem. can anyone help?
November 19, 2011

Math
543
November 11, 2011

Math
Change them all to the same denominator. The common denominator is 120
November 11, 2011

math
600 times .06 times 12. Add this answer to 600.
November 10, 2011

algebra
m to the second
November 10, 2011

algebra
There is no answer. You cannot divide by 0.
November 10, 2011

Algebra 2
P=the principal ( the amount borrowed) R=the rate(percent) T=time the amount is borrowed I=interest You must multiply P R T together to get the interest
November 8, 2011

ENGLISH
PLEASE HELP !! Identify the pronoun in the sentence below. Also identify the class and noun function of the pronoun using the abbreviations from the chart. For intensive pronouns, put NONE for noun function. 1.Robert was successful because his planning paid off 2.Tim said he ...
November 3, 2011

english
Identify the pronoun in the sentence below. Also identify the class and noun function of the pronoun using the abbreviations from the chart. For intensive pronouns, put NONE for noun function. That was a very long phone call.
November 3, 2011

physics
The coefficient of static friction between the 3.0 kg crate and the 31° incline shown below is 0.300. What is the magnitude of the minimum force, F, that must be applied to the crate perpendicularly to the incline to prevent the crate from sliding down the incline?
October 23, 2011

Spanish
If I wanted to say "Those butterflies are the prettiest of all." would I say this sentence or should the "esas" be "estas"? Esas mariposas son las más bonitas de todas las mariposas
October 22, 2011

Physics
Awesome, thanks!
October 19, 2011

Physics
A force of 15.00 N to the right causes a 2.02 kg book to have a net acceleration of 0.81 m/s2 to the right. What is the frictional force acting on the book?
October 19, 2011

Physics
A pure copper penny is slid along a steel counter top. If the coefficient of kinetic friction between the copper and the steel is 0.36, what is the magnitude of the penny's acceleration?
October 19, 2011

Physics
Hi! Sorry the math for the proposed answer is wrong. The equation was manipulated incorrectly and will give a wrong answer
October 17, 2011

ochem
is cis-1,2-dimethylcyclohexane a conformational isomer of trans-1,2-dimethylcycloehexane? Please explain.
October 13, 2011

Science
What did Sir Humphry Davy do with the battery he built? I've looked online and haven't been able to find anything. Please help me!!!!
October 2, 2011

Statistics
9 trucks arrive per hour. It takes 6 minutes after reaching the loading station. Two alternatives to modify the situation. One is to change the trucks and add a helper at the loading station at a cost of 50,0000. This would change the arrival time of the trucks to 6 per hour ...
September 29, 2011

WRITE THE NUMERAL MATH
3,000,859
September 28, 2011

MATH
85,700,038
September 28, 2011

math 11 grade
sequence of 2,5,14,41
September 26, 2011

math
^the answer is -12, it says so in the back of my book. But once everything is multiples of 1/32, simplify. then the problem should now be 24x-21x=-36 . then subtract that, you get 3x=-36 . -36/3=-12 therefore, your answer is x=-12. Don't forget the negative.
September 21, 2011

chemistry
A student suspected that an unknown was undergoing a chemical change at its melting point. Suggest a simple method for testing this hypothesis.
September 15, 2011

English
Also, for the first one-I've reread the paragraph, and now I think it would be two characters-Montrsor is the I and Fortunato is "he" because "you" is not a character,is it? Here is what I meant by number: 3Natural consequence is just something that ...
September 13, 2011

English
We had to read the opening paragraph of "The Cask of Amontillado" and analyze it with the following questions. I really need help. I understand Montresor is going to seek revenge upon Fortunato. 1.In the first paragraph, how many characters are mentioned? I think 3 2...
September 13, 2011

chem101
Why is CH3CH2NH2 the least acidic?
September 11, 2011

chem101
which of the following compounds have polar bonds and a net dipole moment? a) H3COH b) H3CCOCH3 ALSO PLEASE CHECK THIS, RANK THE FOLLOWING FROM MOST TO LEAST ACIDIC COMPOUND: A)H2SO4>H3CCO2H>H20 B)H3CCH2NH2>H3CCH2OH>H3CCO2H
September 11, 2011

math
Add 3 to both sides. Result is 1/2x=6. Now multiply both sides by 2. This gives you 12. This is the final answer.
September 1, 2011

Math
I have a square cake. The cake is iced on top and all the sides. I need to cut the cake in 6 pieces all pieces getting the same amount of cake and icing. Please help me if possible with a diagram.
September 1, 2011

math
Use the quadratic formula
September 1, 2011

Science
Abbreviations you can use for science?
August 25, 2011

4th grade math
100,000
July 25, 2011

Social STUDIES
I agree with all of the answer
July 7, 2011

Trigonometry
Solve: 2 cos[x-ð/8]-sqrt2=0
May 30, 2011

Trigonometry
If tan theta= 3 and ð<theta< 3ð/2, find cos theta.
May 30, 2011

Math (pre-algerbra)
I've tried this sooo many times I have huge marks on my paper and I just can't figure it out: 3a/8-a/12+7/2=7
May 9, 2011

math
47 divide by 6
May 4, 2011

speech
why is australia a luck contry
May 3, 2011

5 grade math
$3,000,000,000,000,000 how much is this in words?
May 2, 2011

math
which of the numbers are integers? 11/3,9.7,-163,-3/8,1
April 26, 2011

math
The following scores were recorded on a 100-point examination: 95, 75, 76, 86, 96, 71, 68, 81, 95, 76, 69, 82, 93, 88, 94 Find the mean and median final examination scores.
April 25, 2011

math
1.)Name the property that is illustrated. a) 7 „e 6 ƒ­ 6 „e 7 b) 7 ƒy (1 ƒy 9) ƒ­ (7 ƒyƒn1) ƒy 9 2.) a) Identify the base in the following statement b) Solve for the amount. What is 81% of 285? 3.)a) Find the supplement of...
April 25, 2011

Math
Corinne rolls two six-sided number cubes with sides labeled 1-6. What is the probability that she rolls a 6 on both cubes? A. 1/36 B. 1/12 C. 1/6 D. 1/3 I think its A
April 20, 2011

chemistry
The legal limit for drunkenness is 0.08 ( 0.08 grams of alcohol per 100ml of blood). expired air contains the following main gaseous components by volume: 74.1% N2; 15.0% O2; 6.0% H2O; 0.9% Ar; and 4.0% CO2 at 37 degrees Celcius and 1 atm. Determine the density of ethanol.
April 19, 2011

Math
Which statement is correct? A. All intergers are rational numbers. B. All irrational numbers are whole numbers. C. A real number must be a rational number. D. A repeating decimal is an irrational number I think it's either A or C.
April 18, 2011

Math
I have three more questions I do not understand. 1. Two points (-1,1) and (3,-2) are graphed on a coordinate plane. What is the shortest distance between the points? A. 3 B. 4 C. 5 D. 7 I have no idea how to do this. 2. Which expression represents the nth term in the sequence ...
April 18, 2011

Math
Thanks so much!
April 18, 2011

Math
The chart shows the number of cars sold per week at a car dealership during the month of June. Salesperson Week 1 Week 2 Week 3 Week 4 Tim 4 8 2 1 Geena 1 2 7 1 Rafael 2 1 5 4 Sonny 4 1 1 10 How should the data be displayed to make the most convincing argument that sales ...
April 18, 2011

Math
Check my answer please? Yuri is wrapping presents. The first box measures 9 inches by 12 inches by 2 inches. He has a second box with dimensions that are each half of the length of the first box. How does the surface area of the second box compare with the surface are of the ...
April 17, 2011

Math
Could you please check my answer? Subtract: (6a+2b-5c)-(3a+2c) My answer was: 3a+2b-7c
April 13, 2011

Math
I'm confused on two questions that are kind of similiar: State the slope and y-intercept of y= -1/2x I know the slope is -1/2 but I don't know the y-intercept State the slope and y-intercept of y= 3x-4 I know the slope is 3, but I don't know if the y-intercept is 4...
April 11, 2011

Math
Vera wrapped a package that measured 8 in. by 10 in. by 5 in. Find the surface are of the package. I really don't know why I'm having trouble with this problem, but for some reason I just don't know where to start it.
April 5, 2011

Math
Which measure of central tendency best describes these data? 100, 5, 90, 95, 100 A. the mode only B. the mean and the median C. the mean only D. the median only I've never really understood central tendency
March 31, 2011

Math
Thank you!!
March 31, 2011

Math
B. every twenty-fifth name in the town's census directory
March 31, 2011

Math
Charlotte wants to conduct a survey to find out if the people in her town think that the town should build a new library. Which group of people would be a representative sample to survey? A. parents with children in middle school B. every twenty-fifth name in the town's ...
March 31, 2011

Math
What is the probability of drawing a heart or a diamond from a standard deck of 52 playing cards? I got 1/2, is this correct?
March 30, 2011

Math
Okay thanks
March 30, 2011

Math
What is the probability of rolling a number cube and getting an even number or a multiple of 3? I got 4/6 as the probability, but that isn't a choice. 6 is a multiple of 3 and an even number, so if I count 6 once, then I get 4/6 as the probability. But if I count 6 twice (...
March 30, 2011

Math
Okay, so the first quartile would be 40, right?
March 29, 2011

Math
You received scores of 70, 40, 70, 90, and 40. Find the first quartile. I don't even know what a quartile is.
March 29, 2011

Chemistry
When someone buys fish at the fresh fish market, they should smell the fish to test for freshness, the less “fishy” the smell the fresher the fish. I am supposed to explain the source and chemistry, including reactions, structures, and names of the compounds, behind ...
March 28, 2011

marketing
to encourage managers to disregard the criterion that a product-market segment should be substantial
March 27, 2011

3rd grade math
47 by 6
March 27, 2011

Math
Thanks, I was confused on this problem! And yes, that's what I thought when I read that gas was only $1.22!
March 21, 2011

Math
The gas tank of a car holds 20 gallons of gas. A gallon of gas costs $1.22. When the tank was filled it cost $20. About what percent of the tank was filled?
March 21, 2011

Math
Thank you both!!
March 14, 2011

Math
A molecule of water is made up of 2 atoms of hydrogen and 1 atom of oxygen. What percent of the atoms of a water molecule is oxygen?
March 14, 2011

Penn Foster
Haha!Glad someone finally got to bottom of this!Happened where I met some people and they said how it was easy to get their degree with getting answers of this site!Made me mad!
March 8, 2011

geometry
the ratio of the perimeter of two similar squares is 5 to 4. If the area of the smaller square is 32 square units, what is the area of the larger square?
March 7, 2011

Math
Okay I get it now. Thank you so much!
March 1, 2011

Math
I have no idea how to do this problem: Select the expression below that is equal to 4(9-m). A. 4m-36 B. 13-m C. 36-m D. 36-4m
March 1, 2011

Math
Thank you!!
February 27, 2011

Math
Could you please check my answer? I did this: 10+10=20. 5.49/20=0.2745 per battery 4+4=8 2.98/8=0.3725 per battery The better deal is if you buy the one 10 pack for $5.49 and get one free.
February 27, 2011

Math
Find the unit price and tell which is the better buy: Buy one 10 pack of AAA batteries for $5.49 and get one free, or buy two 4 packs for $2.98.
February 27, 2011

Math
Find the unit price and tell which is the better buy: A 64 oz. bottle of juice costs $2.39, and a 20 oz. bottle costs &0.79. You can use a 20-cents-off-coupon if you buy four 20 oz. bottles or a 15-cents-off-coupon if you buy a 64 oz. bottle. Which is the better buy?
February 27, 2011

chemistry help
so is it 900 and 4180 is that the difference???
January 17, 2011

chemistry help
a kilogram of aluminum metal and a kilogram of water are each warmed to 75 degree celisus and placed in two identical insulated containers. one hour later, the two containers are opened and the temperture of each substance is measured. the aluminum has cooled to 35 degree ...
January 17, 2011

chemistry help
a kilogram of aluminum metal and a kilogram of water are each warmed to 75 degree celisus and placed in two identical insulated containers. one hour later, the two containers are opened and the temperture of each substance is measured. the aluminum has cooled to 35 degree ...
January 17, 2011

chemistry
a kilogram of aluminum metal and a kilogram of water are each warmed to 75 degree celisus and placed in two identical insulated containers. one hour later, the two containers are opened and the temperture of each substance is measured. the aluminum has cooled to 35 degree ...
January 17, 2011

Algrebra II-please check my answer
Determine the zeros of the function 7x^2 + 9x = 0 answers were: {-9/7} {-9/7,0} {o,9/7} {9/7} I think the answer is {-9/7,0} but I'm not positive when I worked it-If this is wrong please steer me into the correct calcs because then I don't what I'm doing wrong 2....
January 14, 2011

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