Friday
November 28, 2014

Posts by josh


Total # Posts: 1,529

Math - Calculus III
Find the double integral of f (x, y) = (x^7)y over the region between the curves y = x^2 and y = x(3 - x).
November 8, 2011

Math
Find the double integral of f (x, y) = (x^7)y over the region between the curves y = x^2 and y = x(3 - x).
November 8, 2011

political science
In need of help on my political science homework please help with these questions Only these questions left! One reason why the US has only 2 major parties is that it has: A. insufficient opportunities to bribe candidates B. too much involvement by religious groups C.single-...
November 6, 2011

Chemistry! HELP;
An atom of potassium (K) has 19 protons: 18 electrons in its inner electron energy levels and 1 electron in its outer energy level. What is the easiest way for this atom to get a filled outer energy level? What is formed?
November 6, 2011

algebra
can you please help me with these 1. -5/c = 1/3 2. k/8 = -2/5 3. 6/z = -3/5
November 1, 2011

math
Please help me with these 1. -5/c = 1/3 2. k/8 = -2/5 3. 6/z = -3/5 Thank you
November 1, 2011

Botany
During the last part of cellular respiration in the mitochondrion, electron flow is tapped and used to make ATP. Where do the electrons end up when they are finished flowing?
October 31, 2011

Math
Find the general solution of the equations csc^2 θ =4/3.
October 30, 2011

Pre Calculus
using the factor theorem to show that x-c is a factor of P(X) for the given values of c, and factor 1. P(x)=x3-5x^2+8x-4; c=1
October 29, 2011

Pre Calculus
Exponential growth and decay find the half life of a radioactive substance if 220 grams of the substance decays to 200 grams in 4 years?
October 25, 2011

CHEMISTRY PLEASE HELP
a) How will the concentration of NaOH be affected if during the titration some of the solid potassium hydrogen phthalate was spilled during the transfer? Will the concentration of the standardized NaOH increase, decrease, or have no effect? b) How will the molar mass of an ...
October 24, 2011

CHEMISTRY PLEASE HELP
Using the data collected for part b on your data sheet, calculate the molar mass of the unknown acid. Include the calculation for each trial and the average. Trial One Results: Mass unknown acid: 0.500g Final buret reading: 18.01mL Initial buret reading: 0.11mL Volume NaOh ...
October 24, 2011

CHEMISTRY PLEASE HELP
Using the data collected for part c on your data sheet and assuming the density of the vinegar is 1.00g/mL, 1) calculate the molar concentration of acetic acid (CH3COOH) in the vinegar sample using the average volume of NaOH. 2) calculate the mass percent of acetic acid in the...
October 24, 2011

Chemistry
Using the data collected for part c on your data sheet and assuming the density of the vinegar is 1.00g/mL, 1) calculate the molar concentration of acetic acid (CH3COOH) in the vinegar sample using the average volume of NaOH. 2) calculate the mass percent of acetic acid in the...
October 24, 2011

Chemistry
Using the data collected for part b on your data sheet, calculate the molar mass of the unknown acid. Include the calculation for each trial and the average. Trial One Results: Mass unknown acid: 0.500g Final buret reading: 18.01mL Initial buret reading: 0.11mL Volume NaOh ...
October 24, 2011

Chemistry
a) How will the concentration of NaOH be affected if during the titration some of the solid potassium hydrogen phthalate was spilled during the transfer? Will the concentration of the standardized NaOH increase, decrease, or have no effect? b) How will the molar mass of an ...
October 24, 2011

statistics
government data assign a single case or each death that occurs in the u.s. the data show that the probability is 0.45 that a randomly chosen death was due to cardiovascular disease, and 0.22 that i was due to cancer. Suppose a docote checked the cause of death of 2 randomly ...
October 24, 2011

Pre Calculus
Inverse functions what is the inverse function of f(x)=1/square root of x +1? and f(x)=1-x^2, x<0?
October 23, 2011

Pre Calculus
Exponential and log functions What initial investment at 8.5% compounded continuously for 7 years will accumulate to 50,000?
October 23, 2011

Pre Calculus
Inverse functions find the value If f(x)=1/x, find f^-1 (2)
October 22, 2011

Pre Calculus
Exponential Growth and Decay Find the half-life of a radioactive substance that decays by 5% in 9 years.
October 22, 2011

Pre Calculus
Logarithms Solve the equation for x 1-ln(3x+2)=0
October 21, 2011

Pre Calculus
Applications of trigonometric functions Solve the missing parts of the triangle satisfying a=125 b=150 alpha=55 degrees There are two solutions
October 14, 2011

Math
I have input x (20,1,40,4,8,10) and output y (2,40,1,10,5,4). What is the function?
October 13, 2011

Calculus
Using Law of Sines: Need Help 1. alpha=70 Degrees Beta=38 Degrees a=35
October 13, 2011

math
58 cm times 55.6. try to find the area for this problem
October 11, 2011

Physics
Two blocks are at rest on a frictionless, 20 degree incline. What are the tensions in the two strings if block 1= 5.3kg and block 2= 2.4kg?
October 10, 2011

Physics
Each of 108 identical blocks sitting on a frictionless surface is connected to the next block by a massless string. The first block is pulled with a force of 108N. What is the tension in the string connecting block 108 to block 107?
October 10, 2011

Physics
Each of 108 identical blocks sitting on a frictionless surface is connected to the next block by a massless string. The first block is pulled with a force of 108N. What is the tension in the string connecting block 108 to block 107?
October 10, 2011

algebra
I NEED HELP SOLVING THIS PROBLEM WX/P + P/X = PLEASE EXPLAIN AND SHOW HOW TO SOLVE W = 3.5, X = .4, P = 2.6
October 10, 2011

Calculus
solve this equation on the given interval expressing the solution for x in terms of inverse trigonometric functions. 6(cosx)^2-cosx-5=0 on (pie/2, pie)
October 10, 2011

physics
Each of 108 identical blocks sitting on a frictionless surface is connected to the next block by a massless string. The first block is pulled with a force of 108N. Part A. What is the tension in the string connecting block 108 to block 107? Part B. What is the tension in the ...
October 9, 2011

Chem
A lake may be polluted with Pb2+ ions. what precipitation reaction might you use to test for the presense of Pb2+?
October 9, 2011

Physics
An ice sled powered by a rocket engine starts from rest on a large frozen lake and accelerates at 15.0 m/s 2 . At t1 the rocket engine is shut down and the sled moves with constant velocity v for another t2 s. The total distance traveled by the sled is 5.60 × 10 3 m and ...
October 6, 2011

trig
5 and 6
October 5, 2011

math
write the unit rate of2 into 50
October 3, 2011

math
type 8580 words in 2hrs and 45mins
October 3, 2011

math
Fator the trinomial: 4) 2 p + 10p +25 6) 2 y - 5y -24 8) 2 n + 2n -48 10) 2 y + 17y + 72 = 0 12) 2 w - 13w + 42 = 0
September 28, 2011

Spanish SRAJMcGIn please recheck
Please recheck my above posting-thank you
September 28, 2011

Spanish -another question
I'm sorry but I don't understand about #5-I should have written it as I could almost reach it so it would be Prefiero esa sepiete. Is that correct? Were the others correct I guess my closest is this/these My far away is you can almost reach them and my fathest would be...
September 28, 2011

Spanish -another question
Correction-Number 5 should be Prefiero esa serpiente. Correct because its feminine?
September 28, 2011

Spanish -another question
I'm working on distances like saying something is closest far away or furthest. Are these correct for what I put in English as the closest far away or furthest- 1.furthest away- Preferiero aquella arana.(accent over n) 2.far away-Prefiero esa gallina. 3. far away-Prefiero ...
September 28, 2011

Spanish
Thanks-appreciate it
September 28, 2011

Spanish
Change the verb in each sentence to the present participle. 1.Tú nadas. Tú estás nadando. 2. Él bebe café. Él está bebiendo café.
September 28, 2011

Science
8===))
September 20, 2011

Physics
A car is traveling 28 m/s when the driver sees a child standing on the road. He takes 0.8 s to react, then steps on the brakes and slows at 7.0 m/s2. How far does the car go before it stops?
September 19, 2011

Math
50
September 19, 2011

Pre-Calc
That is so easy-I can't believe I was screwing it up so badly-Thank you
September 18, 2011

Pre-Calc
Please help me with this problem-I'm stuck (x-2)/(x+2) = (x+10)/x I'm not even sure where to start-Thanks for any help you can provide
September 18, 2011

Trigonometry
Solve. 2sin(2ƒÆ) + ã3 = 0 interval [0, 2ƒÎ) How do I start this? I feel like maybe Trig Identities, but I'm not really sure.
September 16, 2011

Math trig.
find the length of the arc intercepted by a central angle of 35 degree 28' in a circle of radius 15ft....i cant figure out how to get it ??
September 15, 2011

math
HOW TO SIMPLIFY 7 6/24?
September 14, 2011

physics
A small rock is thrown vertically upward with a speed of 13.0 from the edge of the roof of a 31.0 tall building. The rock doesn't hit the building on its way back down and lands in the street below. Air resistance can be neglected What is the speed of the rock just before ...
September 13, 2011

Government
The Principle of self-government emphasizes majority rule whereas the principle of liberty emphasizes individual rights. There principles A. are universal and are the foundation of all legitimate governments. B. have no real meaning in practice. C. have the same meaning for ...
September 11, 2011

Math
Evaluate if r=-8: |-15-r|+|r|=
September 9, 2011

chemistry
1.1
September 5, 2011

algebra
Factor: A.) 2x^2-9x-18 B.) 14x^2-55x-36 C.) x^3+3x^2-x-3
September 3, 2011

physics
A student uses a sonic motion detector to determine the position of a car at various times. The student takes five positions at five different times. The student's data is represented below: Time t [s] Position x [m] 0.5 39.9 1.4 75.4 2.9 139.3 3.7 186.5 4.1 193.2 (a) Plot...
August 30, 2011

physics
An object moves to the right according to the equation x = 4t2 + 3t + 16 where x is in meters and t is in seconds. Determine the object's average velocity between time t = 0 and time t = 4 seconds.
August 30, 2011

science
1. what weight in grams of magnesium oxide will produce from burning 96 grams of magnesium? 2. a solution containing 252g of calcium sulfate will produce from 165lbs of phosphate rocks containing 82.5 % pure calcium phosphate treated with sulfuric acid? 3. how many tons of ...
August 28, 2011

Calculus
find tha value of f(x)=x3 where f(x+h)-f(x)/h so far I got 3x2+3hx+h2/h and got stuck from here.
August 27, 2011

science
1. What weight of aluminum may be obtain from 1 kg of aluminum oxide? 2. how many liters of hydrogen would be form by the reaction of 25g of hydrochloric acid and sufficient quantity of zinc? 3. 0.82l of an unknown gas at 35 degree Celsius and 80 cm-Hg weigh 2.46g. compute for...
August 27, 2011

Calculus
I am having trouble with these 2 problems. Evaluate: (1/x^9)dx Evaluate: (5x^5-4x^3+6x)dx
August 26, 2011

Calculus
Sorry, I typed wrong. The equation is (3x^4-2x^3+7x)/x^4+14x-2
August 26, 2011

geometry
find the value of b if jm = b and ml = 3b-4
August 24, 2011

statistics
A researcher is interested in studying people’s mean age in a certain region. If the population standard deviation is known to be 8 years and 1.5 year of error margin is allowed, find the minimum simple size the researcher needs to use, knowing that he is going to conduct...
August 24, 2011

biology
what is the difference between a chemical that is an irritant compared to a chemical that is corrosive?
August 21, 2011

Web Design
how has the internet changed since 1980?
August 19, 2011

Calculus
put function in standard form f(x)=-4x^2-32x+9
August 3, 2011

Calculus
put in standard form: 4x^2=36+9y^2
August 1, 2011

Calculus
If $22,550 is invested at 2.95% compounded continuously, how long will it take to reach $50,000 in the account?
August 1, 2011

Calculus
8-3i divided by -4-6i=
August 1, 2011

Calculus
Need help with this complex number equation. 8-3i/-4-6i=
July 30, 2011

Calculus
how to convert this from rectangular to polar? r=cos theta
July 29, 2011

Math
Use Mathematical Induction to show that the statement 2 + 6 + 10 + . . . + (4n – 2) = 2n^2 is true
July 29, 2011

Calculus
How can I convert polar coordinates to rectangular coordinates?
July 29, 2011

Chemistry
If a buffer solution is 0.200M in a weak acid (Ka=1.6*10^-5)and 0.480 M in its conjugate base what should the pH be?
July 26, 2011

Chemistry
If the Ka of a monoprotic weak acid is 4.3*10^-6, what is the pH of a 0.16 M solution of this acid?
July 24, 2011

Chemistry
calculate the pH and the pOH of an aqueous solution that is 0.035 M In HCI and 0.080 M in HBr?
July 23, 2011

Chemistry
At a certain temperature, 0.660 mol of SO3 is placed in a 3.00 L container. 2SO3=>2SO2+O2 Kc=
July 23, 2011

Pre Calculus
If $22,550 is invested at 2.95% over 10 years, describe the amount of the investment if interest is compounded a. Every 2 months equation: -A(t)=Ao(1+i/n)n*t
July 21, 2011

Calculus
Use the Law of sines to find the remaining sides. 1. a=40 degrees; Beta=87; c=115
July 20, 2011

Chemistry
What is the ph of 2.5 M solution of HClO4?
July 20, 2011

Chemistry
True or false 1. The energy of a collision between atoms or molecules must be greater than the activation energy for bonds to be broken? 2. Decreasing the temperature decreases the kinetic energy of the reactant, and the reaction goes more slowly? 3. two or more atoms must ...
July 19, 2011

Chemistry
Hi. How would I determine the rate constant of a reactant?
July 19, 2011

Chemistry
The rate constant for this first order reaction is 0.0470s-1 at 400 C. A to products After how many secs will 11.0% of the reactant remain?
July 19, 2011

Chemistry
The rate constant for this first order reaction is 0.440s-1at 400 C. A to products How long(in seconds) would it take for the concentration of A to decrease from 0.740 M to 0.290 M?
July 19, 2011

Calculus
find the exact value of sin 11pi/12 using the sum or difference formula.
July 19, 2011

phys science
A space shuttle orbits at an altitude of approximately 200km above the surface of the Earth. If the radius of the Earth itself is 6380 km, what’s the acceleration due to gravity at the altitude of the space shuttle?
July 18, 2011

calculus
Verify the identity cot2 beta/1+csc beta=1-sin beta/sin beta.
July 17, 2011

Chemistry
No its not a typo but I did put the wrong activation energy. Its suppose to be a certain reaction has an activation energy of 37.70kj/mol. At what kelvin temperature will the reaction proceed 3.00 times then it did at 303k? I was working the problem and got stuck on finishing ...
July 17, 2011

Chemistry
No its not a typo but I did put the wrong activation energy. Its suppose to be a certain reaction has an activation energy of 37.70kj/mol. At what kelvin temperature will the reaction proceed 3.00 times then it did at 303k? I was working the problem and got stuck on finishing ...
July 16, 2011

Chemistry
A certain reaction has an activation energy of 37.30 kj/mol. At what Kelvin temperature will the reaction proceed 3.00 times then it did at 303 k?
July 16, 2011

Chemistry
After 79 mins 20.0% of a compound has decomposed. What is the half life of this reaction assuming first-order kinetics?
July 16, 2011

Chemistry
The rate constant for this first order reaction is 0.0470 s-1 at 400 C. A TO Products After how many seconds will 11.0% of the reactant remain?
July 16, 2011

Chemistry
The rate constant for this first-order reaction is 0.440 s-1 at 400 C. A to products How long in seconds would it take for concentration of A to decrease from 0.740 M 0.290 M?
July 16, 2011

Chemistry
Determine the average rate of change of B from t=0s to t=352s. A to 2B Time Concentration of A (M) 0 0.670 176 0.385 352 0.100
July 16, 2011

Chemistry
Determine the average rate of change of B from t=0s to t=352s. A to 2B Time Concentration of A (M) 0 0.670 176 0.385 352 0.100
July 16, 2011

Chemistry
The rate of the following reaction is 0.480 M/s. What is the relative rate of change of each species in the reaction? A+3B=2C
July 16, 2011

Pre Calculus
use the sum of difference formula what is sin(pi/2-5pi/3)?
July 14, 2011

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