# Posts by Chandler

Total # Posts: 79

Algebra
write an expression to show the difference of twice X and 3 then find the value of your expression if x equals negative 2 Help again pls

Algebra
you count the number of times your heart beats in 15 seconds define a variable and write an expression for the number of times your heart beats in a minute HELP

TRIG WORD PROBLEMS
19.53 or 19.5

Chemistry
If 1.30g of steam at 100.0 ∘C condenses into 40.0g of water, initially at 31.0∘C, in an insulated container, what is the final temperature of the entire water sample? Assume no loss of heat into the surroundings.

Chemistry
Assuming an element's half-life is 3.6 years. How much of 2 grams of the element would remain after 10.8 years?

statistics
In the old days, we could buy 8 inch floppies for our computers on which to store our favorite programs and data. But, the manufacturing ability was not that good back then and 1% of these 8 inch floppies sold had a bad sector or two on them which made them have less memory ...

statistics
30 new babies were born yesterday in the hospital. If the average weight of a new born is 7.5 pounds with a standard deviation of 2.1 pounds, what is the probability of the average weight for these 30 newborns is between 7.2 and 7.6 pounds. Remember, all probabilities are ...

statistics
When using the normal approximation to the binomial, what is the standard deviation used in the standardization formula when approximating a binomial distribution with 226 trials and p=0.25? Please submit your answer with 4 decimal places

statistics
You have a box of 15 widgets whose average weight for each individual widget is 10 pounds with a standard deviation of 4.0 pounds. Based on this information, what is the standard deviation, taken to 4 decimal places, for the sample average of the weight of the widgets in the box?

statistics
When using the normal approximation to the binomial, what is the mean used in the standardization formula when approximating a binomial distribution with 123 trials and p=0.35? Please submit your answer with 2 decimal places

statistics
you have a box of 12 widgets whose average weight for each individual widget is 2.6 pounds with a standard deviation of 3.3 pounds. Based on this information, what is the mean, taken to 1 decimal place, for the sample average of the weight of the widgets in the box

math
150

math
A science teacher has a supply of 50% sugar solution and a supply of 80% sugar solution. How much of each solution should the teacher mix together to get 105 ML of 60% sugar solution for an experiment 70 ML of the 50% solution and 35 ML of the 80% solution 35 ML of the 50% ...

Algebra 2

algebra 1 study helps
if you go to connections academy email me at cjrandom337 at gmail for answers to your whole test OK.

physics
I need help! i don't know how to do this problem. average atmospheric pressure at earth's surface is 1.01 x 10^5 N/m^2. Earth's radius is 6.37 x 10^6m. Show that the total weight of earth's atmosphere is about 5.15 x 10^19 N.

Math (Combinatorics)
A newly designed international airport is planning to label its gates. Each gate must be assigned a letter from the alphabet from A to M (13 in all), and a number from 1 to 15. To avoid confusion, any two gates must be assigned a different letter, or a different number (or ...

Spanish
Mostly a good job, but a few edits are necessary: -la salud not el salud -comidas not comida -try "comiendo alimento (food) saludable puede mantener un cuerpo fuerte y ayudar con perder peso, pero de una manera saludable." -puede ayudar not puede ayuda -I would use ...

Math
Two cards are drawn in succession without replacement from a standard deck of 52 cards. What is the probability that the first card is a heart given that the second card is a diamond? (Round your answer to three decimal places.)

English
Is the word desperate an omitted syllable, omitted letter, or an added syllable?I think is is an omitted letter.

math
The students in the Art Club are tiling a wall at the entrance to room 111 that is 8 ft by 16 ft. They are using tiles that are 6 in. by 6 in. to create a multi-colored design. How many tiles do the students need?

AP Chemistry
If .100 M NaCl (aq) is added slowly to a beaker containing both .120 M AgNO3 (aq) and .150 M Pb(NO3)2 (aq) at 25C which will precipitate first, AgCl(s)PbCl2(s)?

math
A horse gallops a distance of 10 kilometers in a time of 30 minutes. What is its average speed?

math
3x567

chemistry
Which of the following is best described as an acid-base reaction? 1. NaCl + AgNO3 !NaNO3 + AgCl 2. Ca + 2H2O ! Ca(OH)2 + H2 3. 2HgO ! 2 Hg + O2 4. KCl + NH4NO3 ! KNO3 + NH4Cl 5. NH3 + H2O ! NH+ 4 + OH−

chemistry
Given the following list from the activity se- ries of metals (from most active to least ac- tive) K, Na, Al, Mn, Cr, Cd, Co, Pb, Hg which reaction would you NOT expect to oc- cur? 1. Na(s) +Mn2+(aq) ! Na+(aq) +Mn(s) 2. Co2+(aq) + Al(s) ! Al3+(aq) + Co(s) 3. Cd(s) + Pb2+(aq...

Chem
A volume of equimolar strong acid like HCl is mixed with an equal volume of equimolar strong base like NaOH in a beaker of water. What exists after the reaction?

Geography
Awesome, thanks Ms.Sue!

Geography
The people of Africa vary greatly across the continent. Thousands of different ethnic groups occupy this vast continent. In two or three well-developed paragraphs, suggest two ways in which ethnic groups can differ from one another besides language Thousands of different ...

Science
What would happen to the amounts of solar radiation reflected and absorbed if a large aount of light colored dust was added to the air

AP Chemistry
A solution of sodium hydroxide is standardized against potassium hydrogen phthalate (KHP, formula weight 204.2 g/mol). From the following data, calculate the molarity of the NaOH solution: mass of KHP 1.234 g; buret reading before titration 0.23 mL; buret reading after ...

Chem
If 0.03 moles of sulfuric acid is mixed with water to make 266 mililiter of solution, what is the molarity of H+? Answer in units of M.

Chem
How many milliliters of 1.5 M HCl must be transfered from a reagent bottle to provide 25 g HCl for a reaction? Answer in units of mL.

Chem
What mass of MgSO4 · 7H2O is required to prepare 700 mL of a 0.342MMgSO4 solution? Answer in units of g.

AP Chem
It takes 58 mL of 0.124 M KOH to neutralize 34.5 mL of H2SO4 solution. What is the concentration of the H2SO4 solution? Answer in unites of moles/liter.

AP Chem
21.9 x (463.07/479.07)=21.1685 Must have done something wrong the first time. Is that right?

AP Chem
I got 156.356 grams, but it still says that's wrong.

AP Chem
An ore contains Fe3O4 and no other iron. The iron in a 51-gram sample of the ore is all converted by a series of chemical reactions to Fe2O3. The mass of Fe2O3 is measured to be 21.9 g. What was the mass of Fe3O4 in the sample of ore?

Math
Can you check these questions for me? 1. Add: (3x^4-x+2)+(9x^5-x^2+x) 9x^5+3x^4-x^2+2 2. Add: (4x^3-2x^2+x+4)+(9-x^5-x^2+4x) -x^5+4x^3-3x^2+13 3. Subtract:(4x^4+3x+x^2)-(x^2-6+3x^3) 4x^4-3x^3+3x+6 4. Subtract: (5x-6)-(3x^3-2x^2) -3x^3+2x^2+5x-6 5. Subtract: (x-3x^4+2x^2)-(x^3+...

Biology
There are many differences between the two major cell types: prokaryotes and eukaryotes. However, the different structures and modes of organization perform basically the same functions. Briefly compare and contrast the different features or functions of prokaryotes and ...

Geography
Oops left this out Which of the following problems is not a result of Egypt's growing population? A. overcrowded cities B. emigration of educated professionals to other countries C. a diminishing food supply D. widespread unemployment I'm just about sure its either A or C

Geography
How were the traditional Southeast Asian farmers affected by European colonization? A. They became wealthy from the rising values of the cash crops they grew and exported to Europe. B. Unable to compare with large landowners, they were forced to leave their land and work on ...

Geography
Following the breakup of the Soviet Union, what are some of the major problems faced by many of the new countries? Many of the new countries didn't know how to become democratic. The people weren't used to having a choice, voting, or political parties. Where they lived...

Geography
Oh sorry, I was just wonderig does it flow right and make sense?

Geography
Discuss the process known as the "Four Modernizations" and how the attitude of the Chinese leaders in this area contrasted in response to the rise of democratic protests. When Mao Zedong died in 1976, a struggle happenned between the Gang of Four and a group led by ...

Geography
How do you think the existence of nearly 3,000 ethnic groups and 800 languages affect life in countries south of the Sahara? The countries south of the Sahara show more diversity and variety of culture than anywhere in the world. This region speaks more than a one third of the...

Geography
How has the Suez Canal been a catalyst for nationalism in Egypt? When the Suez Canal Company was nationalized on July 26, 1956 by Egypt's president, Gamal Abdel Nasser, he became a hero. He remains an iconic figure in the eye of many people in the Arab world. He was one of...

Geography
Thanks again!

Geography
How do the monsoons and the mountains influence the climate in South Asia? Include in your answer an analysis of how monsoons can be responsible for survival and hardship in this region. Monsoons greatly influence the climate in South Asia. In the winter, the winds blow from ...

Geography
Thank you very much! I didn't realize just how many grammatical mistakes i had. Here is my new answer with the grammar fixed (as far as I know) and with a new last sentence.

Geography
Do you think that the British influence in India was positive or negative? Explain your answer. I think that the British influence in India was both positive and negative. They helped ge the country on track by doing things such as ending slavery, improving schools, and build ...

Geography
Ok thanks!

Geography
What were the factors that played a significant role in the collapse of Russian control over Eastern Europe? My Answer: A main factor that played a significant role in the collapse of Russian control over Eastern Europe was a widespread hatred of a corrupt system. There was a ...

Geography
Thanks!

Geography
It has been said that Eastern Europe is a political region more than a physical region. Would you agree or disagree with this statement? You must provide a solid argument for your position. Eastern Europe is tied together as a political region since the end of world war 2. ...

trigonometry

math
The net is 3 feet high. The distance from where the ball is hit to the net is 24 feet. Assume the ball travels in a straight line. At what height must a tennis ball be hit so that it will just pass over the net and land 21 feet away from the net on the other side?

Chemistry
2257 is the heat of vaporization of water.

algebra 1
15 by 45; 9 by 75

Math
A baseball is thrown up in the air from a height of 3 feet with an initial velocity of 23 feet per second. When does the baseball hit the ground?

what is meant by graphic features and list 6

chemistry
Oh and leave a variable for the number you want. Solve.

chemistry
Plug the pressures into the P slots and the volumes into the V spots.

chem help!!
A sealed cylinder of gas contains nitrogen gas at 1.00 103 kPa pressure and a temperature of 14°C. The cylinder is left in the sun, and the temperature of the gas increases to 51°C. What is the new pressure in the cylinder?

geometry
0,1,4,34,123

im writing a essay on a day at the park and i could use some help please thank u

biology
How would lgiht reaction be affected if there were no concentration gradient across the thlykoid membrane?

Science
Defining variables?

social studies
Who wrote the missouri compromise?

Science
stars

social studies
What is a mountain or a coastal community??

Math
I'm confused. I can't seem to make the answer out of what you have.

Math
Ok, so say I use the half angle formula in sin. I get: sin((pi/6)/2)= sqrt((1-sqrt3/2)/2). So sin(pi/12)=sqrt(2-sqrt3)/2 I get to here by multiplying the whole equation by (2/2). So from here, (whew) how to I get to pi/24

Math
I was wondering why you were using cosin the problem when the half angle formula for sin is +-sqrt((1-cosx)/2). I can get pi/12, but I can't figure out how to use that answer to get to pi/24

Math
I need the actual value like 1/2 or sqrt3/2.

Math
Find the exact value of sin(pi/24) So like i need like the value like sqrt3/2 but for pi/24... also if you could show me the steps so i could figure the rest out, that would be cool

Math
please...it's due tom. and I have no clue how to do it.

Math
Find the exact value of sin(pi/24) So like i need like the value like sqrt3/2 but for pi/24... also if you could show me the steps so i could figure the rest out, that would be cool

Transformations-Algebra
go across 3 then go up 3