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Posts by Mariana

Total # Posts: 100

Math
The table below shows the populations of four countries for the year 2006 expressed in scientific notation. Population in 2006 Country Population Lebanon 3.90 × 106 Mexico 1.08 × 108 Peru 2.84 × 107 Spain 45.5 × 106 Of the countries listed, which one ...

Math
I mean A!

Math
So it's B.

Math
Can someone please check my answer???

Math
which of these numbers is not rational? A.√3 B.0.25 c.1/5* d.√9 *= My answer

english
I have to revise each statement to eliminate the unethical aspects. - Factory- trained technicians respond to all our calls. - “The service contract… on the whole… applied to upgrades .”

Stastics
In a study of proctored and non-proctored tests in an online course, researches obtained the data below: Group 1 (Proctored): 𝑛 = 30, 𝑥̅= 74.30, 𝑠 = 12.87 Group 2 (Non-proctored): 𝑛 = 32, 𝑥̅= 80.62, 𝑠 = 22.09 Use of 0....

Stastics
In a study of proctored and non-proctored tests in an online course, researches obtained the data below: Group 1 (Proctored): 𝑛 = 30, 𝑥̅= 74.30, 𝑠 = 12.87 Group 2 (Non-proctored): 𝑛 = 32, 𝑥̅= 80.62, 𝑠 = 22.09 Use of 0....

physical science
Balance of the following equation Ca+O2=CaO

physics
A ball is thrown vertically upward with an initial speed of 25 m/s. Then, 1.8 s later, a stone is thrown straight up (from the same initial height as the ball) with an initial speed of 32.1 m/s . How far above the release point will the ball and stone pass each other? The ...

Physics
Two students are on a balcony 22 m above the street. One student throws a ball vertically downward at 15.5 m/s; at the same instant, the other student throws a ball vertically up- ward at the same speed. The second ball just misses the balcony on the way down. How far apart ...

math
Oh my goodness I just saw this but thank you so much Mrs. Sue you are so sweet. And thank you very much for helping me. :)

math
Ok I got it. Thank you so so much! :)

math
I got 212.55?!

math
Ok so Mrs. Sue can you please explain it to me cause I still don't get it?! :(

math
Ok thanks

math
Ok so which one do I use to get the answer? Mrs. Sue's or Damon's?!

math
During the soccer season, richard attempted 80 goals and made about 65% of them. a. How many goals did Richard make? b. The team made a total of 327 goals. What percent of the team's made goals did Richard make? 15 goals;24.5% 52 goals;15.9% 61 goals;49.2% 212 goals;64%

Math
Oh wow that's really easy... thank you so much Damon! :)

Math
3. After a study was completed at a local college, it was found that 386 1,112 student live with there parents. What percent of students live with their parents? Round to the nearest hundredth of a percent where necessary. 3.44% 34.71% 49.36% 65.28% Can someone please help me ...

Math
Awesome. Ok so can you please help me with 4,6, and 8 plz?!

Math
Oh and if any are wrong can u help me?! Thanks so much! :)

Social Studies
Lol this isn't math lol its social studies... I just always do math on here!lol

Math
1. What compromise did states reach for the purpose of determining representation by population in the House of Representatives? (1 point) Slaves would be counted as three-fifths of a person for official population counts. Slave populations would count for representation but ...

Social Studies Check my answers!
@Shrek you're just trying to pass a test. Have you even read or understood what you're going to do???

Math extra credit
Omg thank you soooo much Reiny! :D

Math extra credit
Ok I also figured out number 2 but not the last one lol

Math extra credit
Never mind I figured out number 1 but not the others. :(

Math extra credit
To find the next address: If the owner imported 100 square feet of marble to decorate the façade of the house and 13 square feet of scrap was left when construction was completed, how much marble was used? Write and solve an equation To find the next address: The ...

Science
correct

MATH
ESTIMATE QOUTIENTS OF 215 DIVIDE BY 9?

math
Ok I figured it out but I got 2 1/4 and 1/2

Math help please?! :)
I got it thanks so much but yah what about the first one?!

Math help please?! :)
What is the solution to (4 x 10^3) x (6 x 10^6), written in scientific notation? 24 x 10^9 2.4 x 10^9 24 x 10^18 2.4 x 10^10 Ted Andrews bought 15 shares of Clark Company stock at $14.875. He sold them a month later $20.375. What was his profit? $6.50 $49.50 $80.50 $82.50 ...

math
Thank you!

Math
Oh my goodness thank you so much! Yes it helped... now I can take the whole test! :D Thank you so so much!

math
What is 0.00000387 in scientific notation? And I don't want anyone to give me the answer... I want someone to help me and be patient because I'm not the fastest learner!

math
what is 98654433445*876689956e347 equal

science
I'm sorry Sierra I don't... I only know the second one because of my Mom, lol but I'm sorry I wish I could help! :(

science
The first one is A I'm not sure about the second on. but good guess! :)

science
Thank you so much for explaining it! :)

Art Help!
yeah C was correct

Math Help!!!
there wrong on the last two^

Literature
thats correct i just took the quiz

International trade
Can you apply comparative advantage theory to business outsourcing?

MATH HELP PLEASE
just got a 100 on it its B, A, D, B

Math
I got a F in math

Math
The daily production costs C (in dollars per unit) for a manufacturer of lighting fixtures are given by the quadratic function C(X)=800-10X+0.25X2 where x is the number of units produced. How many fixtures should be produced to yield a minimum cost per unit?

math
The profit P ( in dollars) for a manufacturer of sound systems is given by the quadratic function P(X)=-0.0003X2+150X-375000 where X is the number of units produced. What production level will yield a maximum profit?

science (check plz)
No its A, I just took the test! :)

Science--HELP!!
Lol ya'll are funny. :D

chem
why would it not be [Kr] 5s^2,4d^9

Chemistry....helpppp
Predict Which among the following substances is likely to have a relatively high melting point.(more than one answer may be selected) * P4 * CaCl2 * CCl4 * AlN * CaC2 * None of the above

Chemistry
What is the electron pair geometry for NCL3?

Chemistry
What is the electron pair geometry for NCL3?

math
i am stuck on this problem! help! Write a quadratic equation that has two solution, 4 and -4. Leave the polynomial in reduced factored form.

math
find the GCF 87h^14t^16,6h^2t^27,15h^6t^28

Chemistry
Why is ionization energy for calcium greater than that for potassium?

Chemistry
how do i write the complete electron configuration for Ga3+ and Mg2+????????????

Chemistry
how many moles of Mg2+ and NO3(there is a negative sign on top of the 3 in NO3)form for each mole of Mg(NO3)2 that dissolves?

Algebra I
Thank you! It did work very well. I will use this website more frequently.

Math
I don't know

math
12345/6789

math
Ok, your very rude @none of your concern!

7th grade math Ms. Sue please!
Maybe *none of your concern* has different questions on his test, but I'm sorry you got a bad grade! :(

7th grade math Ms. Sue please!
Actually BOOP was right! :) Great job

7th grade Math quick help Ms. Sue
I don't think there's anything wrong with this site but I don't think they should give the answers I think they should be patient and "help" them with there problem! Homework "help" Cause how are we supposed to know it later if we were just ...

Algebra 2
A Ball Bounced Four Times,reaching Three Fourths Of Its Previous Height With Each Bounce .after The Fourth Bounce,the Ball Reached A Height Of 27 Cm. how High Was The Ball When It When It Was Dropped?

health information
some examples on some responsibilities on how a manager of a 60bed will have after he is assigned to also run a 90 beds. Becoming a split department. What does this split department situation do to your efficiency as a mannager, and how can you compensate for this change? Also...

health information
becoming a split department manager. Generate a list of the ways in which you believe your responsibilities and the tasks you perform are likely to change because of the merger and your resulting new role?

Algebra
idont the answer i need help

physics
a force of 5 N is required to slide a block at constant speed over the dry surface of a table. The block has a mass of 2.5 kg. The coefficient of friction is..

Spanish
SraMcGin, si me permite decirle, "norteamericana" se pudiera referir igualmente a alguien de Canada. Norteamerica no es exclusiva de Estados Unidos.

Spanish
And when I said it was right, I meant the translation in your second post. "Estadounidense" is the right word.

Spanish
Julian, yours is alright. The word "americana" is a wrong translation.

Biology
Using the codon table, determine the sequence of the protein that will be produced from the mRNA sequence below. Be sure to begin with a start codon. 5'-CCCAAUGUUGCGGCCAUGACAC-3' A. N-Methionine-Leucine-Arginine-Proline-C B. N-Methionine-Histidine-Serine-Threonine-...

Physics
What is the energy released in the fusion reaction: 2H+2H--> 4He + Q? How do I calculate this?

Physics
You are right, considering the mass of the electron emitted I got .352 MeV, which is the correct answer. Everywhere I looked on the internet said to neglect this mass, but I guess it does make a difference. My answer was negative though, does that mean that I only consider the...

Physics
How much energy is released in the beta decay of 14 C? Since carbon-14 decays into Nitrogen-14, the mass of carbon 14 is 14.003242 and the mass of nitrogen 14 is 14.003074, What I did was: (14.003242-14.003074)u * 931.5 MeV/c^2 = (0.156 MeV/c^2)*c^2 = .156 MeV but that's ...

Chemistry
Calculate the pH at the equivalence point for the titration of 0.120 M methylamine with 0.120 M HCl (kb of methyalamine is 5.0 x 10^-4)

Biology
Does light wavelength affect cellular respiration rate? I know that it affects photosynthetic rate. I think it is not supposed to affect cellular respiration rate, but I recently conducted an experiment that has proved otherwise and I just want to make sure about the facts ...

Statistics
Normal probabilities. 11% of all observations are less than z

chemistry
You have an aspirin dissolving in water, with this elements ( arthritis strength BC, arthropan and Ascripitin A/D), how can you separate them to find the amout of each on in water?

English
Into day's - in todays Some basic grammar and spelling that can be fixed by reading aloud and removing 'awkward' words/phrases. Even if they look good on the page, if they don't feel right you should remove them. Also using the same method properly place ...

Science. Please Help!
CHARLES LAW PROBLEMS

math
How much is 4.36 meters in centimeters?

Chemistry
Calcium carbide, CaC2, can be produced in an electric furnace by strongly heating calcium oxide (lime) with carbon. The unbalanced equation is CaO(s) + C(s) ¨ CaC2(s) + CO(g) Calcium carbide is useful because it reacts readily with water to form the flammable gas ...

Chemistry
An unknown salt AS x XH2O was analyzed and found to contain 16.4 percent water. If the anhydrous salt has a formula mass of 183 amu, find the water of crystallization (X) for the hydrate. I have no idea how to figure this out! HELPP PLEASE!!

Chemistry
How do you find the molar mass of HBr?

Geometry
the answer in the book says 8 sqrt of 2. i don't know how to solve it though

Geometry
The sum of the squares of the measures of the sides of a square is 256. Find the measure of a diagonal of the square.

Geometry
The diagonals of a rectangle are 12 inches long and intersect at an angle of 60 degrees. Find the perimeter of the rectangle.

geometry
thanks!

geometry
the length of a diagonal of a square is 22 square root of 2 millimeters. Find the perimeter of the square.

us history
what do u mean by it has diversified our culture and what is an cause and effect for mirgration

us history
my question is on north americans mirgation it says explain one way that mirgration affects us today? then my next question says give one cause and effact of the mirgration of the frist americans?

math
how to dived fraction

math
how to dived fraction

2nd Grade Science
Some objects and ____________ things move quickly. What is the answer to fill-in the blank.

math
im doing percent proportions and it is asking: 57% if 109 is what number? And i already know that you start with 57/100 = x/109 but how do you get the answer, i cant figure it out!!!

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