Wednesday

April 23, 2014

April 23, 2014

Total # Posts: 122

**geometry**

Please use this for the portfolio. You will need graph paper. 1. Start with Triangle ABC with vertices: A(0,2), B(2,5), C(3,0) 2. Find slope of side AB and BC 3. Now TRANSLATE the Triangle 4 units left, and 2 units up (x-4,y+2) and give the new vertices to find A', B',...

**College Chemistry**

In your experiment you weigh out 0.995 g NaHCO3. How much 1.0 M HCl should you add to get the most NaCl?

**math**

if the expression(2ya)4 is equivalent to 16y8 what is the value of a

**BT**

What's the shortcut of sane in stenography?

**algebre**

The number of customers that visit a local small business is 51,200 and has been continuously declining at a rate of 3.8% each year. What is the approximate number of customers that visit the business in 14 years?

**Chemistry**

Calculate the maximum mass of calcium metal that should be used in an equivalent mass determination, with a 100 ml gas measuring tube for collection. Assume 80 ml of hydrogen gas at standard conditions for the purposes of calculation.

**chemistry**

A 1.70 g sample of a certain metal reacts with acid to liberate 380 mL of hydrogen gas, when collected over water at 20 Celsius and over 720 torr. What is the equivalent mass of the metal?

**Chemsitry**

Stomach acid is essentially 0.10 M HCl. An active ingredient found in a number of popular antacids is CaCO3. Calculate the number of grams of CaCO3 needed to exactly react with 250 mL of stomach acid. CaCO3(s)+ 2HCl(aq)= CO2(g)+ CaCl2(aq)+ H20(l)

**Chemistry**

The answer is 1.3 grams of CaCO3. I am not getting that by multiplying mols CaCO3 x molar mass CaCO3.

**Chemistry**

Stomach acid is essentially 0.10 M HCl. An active ingredient found in a number of popular antacids is CaCO3. Calculate the number of CaCO3 needed to exactly react with 250 mL of stomach acid. CaCO3(s)+ 2HCl(aq)= CO2(g)+ CaCl2(aq)+ H20(l)

**physical science**

The primary voltage is still 120 V and the number of primary turns = 60, but now the power in the primary side is 3000 Watts and there is a 120 ohm resistor connected to the secondary. Find the current in the resistor, and the secondary voltage and # turns.

**shoshone**

A bicycle tire decoration covers 1/9 of the circle formed by the tire. If the tire has a diameter of 26 inches, what is the area of the decoration?

**Physics please help! check if its correct**

B and C is switched anwsers

**Physics please help! check if its correct**

A 3.00 kg stone is tied to a thin, light wire wrapped around the outer edge of the uniform 8.00 kg cylindrical pulley. The inner diameter of the pulley is 60.0 cm, while the outer diameter is 1.00 m. The system is released from rest, and there is no friction at the axle of the...

**English**

infinite

**physics**

a 20 kg crate is initially moving down a wall at a speed of 2.0 m/s. Determine the magnitude of the average force exerted by the person in order to stop the crate's downward motion in a distance of .50 m. The person pushes in a direction 53 degrees above the horizontal, an...

**statistics**

25% of the students in an English class of 100 are international students. Find mean, and standard deviation of this binomial distribution

**trig**

Patients with acute or serious infections, such as Salmonella typhi or gram-negative bacteria causing meningitis, can be successfully treated with regular doses of Chloramphenicol. A patient weighing 150 pounds requires a dose of 850 milligrams, while a patient weighing 300 lb...

**math**

A farmer plans to enclose a rectangular region, using part of his barn for one side and fencing for the other three sides. If the side parallel to the barn is to be twice the length of an adjacent side, and the area of the region is to be 512 ft2, how many feet of fencing shou...

**Calculus :)**

Use the substitution x=2tan(theta) to evaluate the indefinite integral 53dx/(x^2sqrt(x2+4))

**Calculus :)**

For the function f(x)=1/(x+1), verify f(x) is one-to-one, then calculate f^-1 (1/4) and (f^-1)' (1/4)

**Calculus :)**

nevermind got it

**Calculus :)**

If 8000 dollars is invested in a bank account at an interest rate of 10 per cent per year, find the amount in the bank after 11 years if interest is compounded annually ____ Find the amount in the bank after 11 years if interest is compounded monthly ____

**Calculus :)**

i dont understand how you set up the equation. what formula do you use for #1 & #3? please and thank you :)

**Calculus :)**

If 8000 dollars is invested in a bank account at an interest rate of 10 per cent per year, find the amount in the bank after 11 years if interest is compounded annually ____ Find the amount in the bank after 11 years if interest is compounded quaterly ____ Find the amount in t...

**Calculus :)**

The number of bacteria in a culture is modeled by n(t)=1550e^(0.24t) (a) The initial number of bacteria is _____ (b) The relative rate of growth of this bacterium population is _____ (c) The number of bacteria after 3 hours is _____ (d) After how many hours will the number of ...

**Calculus :)**

Find the volume of the solid formed by rotating the region enclosed by y=e^(3x)+2, y=0, x=0, x=0.4 about the x-axis.

**CALCULUS:)**

The region between the graphs of x=y^2 and x=6y is rotated around the line y=6. The volume of the resulting solid is ____?

**CALCULUS:)**

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. y=x^2, x=y^2 about the axis x=–3

**CALCULUS:)**

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. x=3y^2, y=1, x=0 about the y-axis.

**CALCULUS:)**

Find the volume of the solid formed by rotating the region enclosed by x=0, x=1, y=0, y=9+x^4 about the x-axis.

**CALCULUS:)**

-4?? that is incorrect..hmm, what am i doing wrong?

**CALCULUS:)**

its not 8

**CALCULUS:)**

Sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Then find the area of the region. 2y=3sqrtx and y=3 and 2y+2x=5

**Calculus:)**

Find the area of the region enclosed by y−2x^2≥0 and |x|+|y| ≤ 1

**Calculus:)**

Find the area of the region enclosed by y−2x^2≥0 and |x|+|y| ≤ 1

**CALCULUS:)**

Please help me... and show steps please :) integral from 0 to 1 of (e^x+1)/(e^x +x) dx

**math**

Coach Johnson is 10 years older than Tim. When Tim started football 3 years ago, Coach Johnson was twice his age. How old is Tim now? Numerical Answers Expected!

**PHYSICS-URGENT HELP**

The answer said it was 7.02 m/s and not 14.3 m/s

**PHYSICS-URGENT HELP**

A stationary police car emits a sound of frequency 1200 Hz that bounces off of a car on the highway and returns to the police car with a frequency of 1250 Hz. The police car is right next to the highway, so the moving car is traveling either directly towards or directly away f...

**Calculus :)**

A rectangle is inscribed with its base on the x-axis and its upper corners on the parabola y=6–x^2. What are the dimensions of such a rectangle with the greatest possible area? Find Width=____ & Height=4 just need to find width.. is not 2

**CALCULUS :)**

find y' of y=sinθ tanθ sqrt(θ^3)

**Calculus**

Given f'(x)=7cosx–11sinx and f(0)=1, find f(x)= ____?

**CALCULUS!**

I understood the first two questions and got them right. But can't get the last.... "What is the smallest value of x at which f(x) intersects its non-vertical asymptote? ___?"

**CALCULUS!**

f(x)=(6x^3–9x^2–3x–1)/(4x^2+7x–3) . Find the equation of the non-vertical asymptote. y = ____3x/2 - 39/8_____ Does f(x) intersect its non-vertical asymptote? (yes or no) ___YES____ What is the smallest value of x at which f(x) intersects its non-vertical as...

**CALCULUS!**

Consider the function f(x)=4x^3–2x on the interval [–2,2]. Find the average or mean slope of the function on this interval. __14__ By the Mean Value Theorem, we know there exists at least one c in the open interval (–2,2) such that f(c) is equal to this mean sl...

**bio chem**

What is the ph when 100 mL of 0.1 M NaOH is added to 150 mL of 0.2 M Hac if pka for acetic acid =4.76?

**integrated science**

explain pressure relations for air

**medical claims and billing**

you must be taking the exact test i am right now :) That is what i came up with.

**math**

how do i solve the problem of _____________________________ 0 14 20 i have to find out what the percentage is

**Honor Stoichiometry**

2AgNO3 + BaCl2 ==> 2AgCl + Ba(NO3)2 How many grams of silver chloride are produced from 5 g of silver nitrate reacting with an excess of barium chloride?

**Chemistry**

A 500.0 g-sample of aqueous hydrogen peroxide (H2O2) contains 31.50% H2O2 by mass. a. Find the mass of hydrogen peroxide in the solution b. Find the mass of water in the solution

**Chemistry**

At 25C and 1.0 atm, 0.25 g of a gas dissolves in 1.00 L of water. What mass of the gas dissolves in 1.00 L of water at 25C and 3.0 atm?

**algebra I**

What is the expression for "the difference between five times a number and twice that number"?

**chemistry**

What is the volume, in mL of .089 m lithium chloride (LiCl) solution containing 4.3g of LiCl???

**chemistry**

What is the volume, in mL of .089 m lithium chloride (LiCl) solution containing 4.3g of LiCl???

**social studies**

i need help with a acrostic for maryland

**Texas History**

What mexican actions led to further conficts with settlers? It was around 1830

**Texas History**

I read that but don't exactly understand

**Texas History**

How did the law of April 6,1830 change relations betweens Texas and the Mexican government?

**chemistry**

What metals are suitable for use as the cage around the magnesium metal?

**chemistry**

How many grams of H2(g)can theoretically be produced from a 5-g sample of magnesium metal and excess HC1(aq)?

**physics**

I did what Bob did and got 134 rpm, which is wrong and crazy fast, but Jay's answer is only twice what the answer should be. What did you do?

**chem 30**

not on me sadly it is at school.

**chem 30**

how do you find solubility of Pb(NO3)2, PbCl2, PbCrO4, and PbS

**Chemistry**

is it 0.6527 J?

**business**

o What are the advantages of the four different special journals? When would you use each type? o What is a subsidiary ledger and what purpose does it serve? o What is a control account and what purpose does it serve? o Which two general ledger accounts may act as control acco...

**phYsics**

Sorry no help is online right now, and i cant help you on this one. Sorry!

**chemistry**

I hope you get it, im getting off.

**chemistry**

I never used those numbers, and you got the 32.06 because you need to divide each number by the smallest number of moles.

**chemistry**

There is no need for you to have K=C=273 because you have nothing in Celcius. But 1000k is 24.40 and the pressure is at 0 atm Ok Ip-4.775 SO3 grams 1000k is 24.40 Your looking for percent compisition. So you have to get S-32.066x1= 32.06/32.06=?? O-16.00x3= 48/32.06=?? Then yo...

**English**

Number 5 is Grammatical, Because of the "such".

**Chemistry**

Okay so you have to first balance them and then count how much you added or minus in each equation.

**Chemistry(defintions)**

I mean i looked in my glossery but i seem to cant find them. Thank you for the help.

**ethics**

AHHHHHHAHAHAH!

**English**

But It would still be acceptable, just because many dont use does not mean that its not Acceptable. Its still correct.

**English**

Correct.

**grd1 math**

10 2 ____ 1st you need to take the 2 and add it with the 0, So Its 2+0=2 the you put a 2 under the line. Then you need to move over to the 1 and since there isnt anything under it you just bring the 1 down. 10 2 ___ =12 Hope It helps.

**Social Studies**

Though the Fourth of July is almost iconic to Americans, some claim the date itself is somewhat arbitrary. New Englanders had been fighting Britain since April 1775.

**Social Studies**

14 year old Andrew Jackson and his older brother Robert were captured by British soldiers in the Battle of Hanging Rock.

**algebra**

I understand that, But all there was, was a ^ that means to the power of three, So you cant just have 5 times a exponet of a 3 unless the number is 0.

**algebra**

Is the 3 postive or negitive?

**chemistry**

how many kilojoules of heat are absorbed when 1.00L of water is heated from 18 degrees celsius to 85 degrees celsius?

**up?**

any1 up who can help?

**9th grade**

During what phase does crossing-over occur? A. prophase I B. metaphase I C. anaphase I D. telophase I

**fibers and fabrics**

those are the wrong answers

**Biology**

ok give me examples of a ploymer that follows these conditions it must have at least 100 atoms it must have at least 3 monomers it must be organic, from a living thing thanks so much!

**MATH Introduction to Math Skills and Strategies**

just plug in the x and y (add them)then divide the total by 3:)

**MATH Introduction to Math Skills and Strategies**

this equals 7

**algebra**

after you multiple the top by 3 and the bottom by 3 you have to either multiple the top by a negative or the bottom so that when adding the x's they cancel out to equal 0. then add the y's and the other numbers. then divide to find y. heres the first step for starters ...

**pre algebra**

ok so for this you do x/3=x/5-2 you multiple both sides by 3 so you have x=x/15 -6 then go on from there

**Algebra1**

um i don't think so if you add 4 to the right side you get 2x=4x+1 then minus the 4x so that gets -2x=1 then divide by -2 which would be x=-1/2 i think thats it:)

**Science**

Does anyone know of a website that has all of the 20 amino acids not just the name but the actual thing like c-oh thing? thanks so much!!!

**French**

also is Musee de Quebec and Musee national des beaux-arts du Quebec the same thing? thanks:)

**French**

does anyone know of any pictures of musée du québec in quebec thanks

**Social Studies**

Also was Achilles heel talked about in Homer's books? Thanks so much!!!

**Social Studies**

Was Hector in the Trojan War mentioned in the Iliad or Odessey by homer? thanks:)

**Social Studies**

Thanks so much!!

**geometry**

well, if two lines are parallel then their slopes are the same I think it would be whatever m*m is.

**hsm**

caluculate the fixed cost, variable costs, and break-even point for the program suggested in appendix d