Sunday
December 21, 2014

Posts by Jason


Total # Posts: 1,129

Calculus
at the end when you get dy/dx = 20/(5x+4y -16) ... what do you replace y with? in the beginning you have y = 4ln(5x+4y) the answer is only in terms of x...
June 19, 2010

Calculus
If f(x) = 4ln(5 x+ 4ln(x)), find f'( x ).
June 19, 2010

statistics
Evolutionary theories often emphasize that humans have adapted to their physical environment. One such theory hypothesizes that people should spontaneously follow a 24-hour cycle of sleeping and waking-even if they are not exposed to the usual pattern of sunlight. To test this...
May 29, 2010

math
500 acres of land costs 800 dollars and every year there is a three percent increase in price then it gives the end cost was one thousand. it asks for the equation using v=p(1+r) raised to the n power
May 25, 2010

math
A certain number changes from 200 to 900 within three hours find the vaulue of k using the formula n times e raised to k times t
May 25, 2010

Physics
that isn't right either but i guess this thing is retarded so w.e thx though
May 8, 2010

Physics
A heat engine has the three step cycle shown above. Starting from point A, 1 L (liter) of ideal gas expands in the isobaric (constant pressure) process A to B at P = 2 atm. B to C is isovolumetric process at V = 5 L, and C to A is an isothermal (constant temperature) ...
May 8, 2010

Physics difficult... chris help again plz.
A heat engine has the three step cycle shown above. Starting from point A, 1 L (liter) of ideal gas expands in the isobaric (constant pressure) process A to B at P = 2 atm. B to C is isovolumetric process at V = 5 L, and C to A is an isothermal (constant temperature) ...
May 8, 2010

Physics
this isn't the right answer either
May 7, 2010

Physics
A heat engine has the three step cycle shown above. Starting from point A, 1 L (liter) of ideal gas expands in the isobaric (constant pressure) process A to B at P = 2 atm. B to C is isovolumetric process at V = 5 L, and C to A is an isothermal (constant temperature) ...
May 7, 2010

science
Scientists performed an experiment to determine whether there is a connection between learning ability and food. They took two groups of 20 mice each, all from the same purebred strain. The mice were deprived of food for 3 days and then given a standard learning session in ...
April 28, 2010

physics
A physics student sits by the open window on a train moving at 25 m/sec towards the east. Her boyfriend is standing on the station platform, sadly watching her leave. When the train is 150 meters form the station, it emits a whistle at a frequency of 3000 Hz. What is the ...
April 21, 2010

PHYSICS
A 16 kg block slides down a 30 degree frictionless incline where it is stopped by a strong Hook's Law spring at the bottom. The spring constant is k = 9.8 x10^4 N/m. If the block slides 9 m from the point where it was released (from rest) to the point where it comes to ...
April 20, 2010

physics
Near the surface of the Earth, a startled armadillo leaps vertically upward at time t = 0, at time t = 0.5 s, it is a height of 0.98 m above the ground. At what time does it land back on the ground?
April 20, 2010

Physics
A motorist drives along a straight road at a constant speed of 60 m/s. At time t = 0 she passes a parked motorcycle police o±cer. The o±cer takes o® after her at t = 0 and accelerates according to the formula a(t) = bt, where t is the time and b is a positive...
April 20, 2010

maths
360
April 20, 2010

math
I'm completely lost withhow u solve this quadratic equation using the square root method 6x^2=1
April 18, 2010

Math
Laura invested her savings in two investment funds. The that she invested in Fund A returned a profit. The amount that she invested in Fund B returned a profit. How much did she invest in Fund B, if both funds together returned a profit?
April 18, 2010

chemistry
how do you convert the moles of nh3 co2 ang h2o? is it just 2 mol nh3 1 mol co2 and 1 mol h20?
April 16, 2010

chemistry
Ammonium carbonate decomposes upon heating according to the following balanced equation: (NH4)2CO3(s)-->2 NH3(g)+CO2(g)+H2O(g) Calculate the total volume of gas produced at 25 C and 1.07atm by the complete decomposition of 11.86 g of ammonium carbonate.
April 16, 2010

Chemistry
If you add 2.50 mL of .150 M HCl to 100 mL of a buffer consisting of .100 M CH_3COOH and .200 M CH_3COONa, what will be the change in pH? (Ka of CH_3COOH is 1.7 x 10^-5).
April 11, 2010

physics
Got it, thanks!
March 29, 2010

physics
Two flat slides of glass are seperated at one edge by a thin wire, as shown below. The top surface of the upper slide and the bottom surface of the lower slide have special coatings on them so that they reflect no light. The system is illuminated with light of wavelength 550 ...
March 29, 2010

math
Determine the area between the z-scores in each pair for a normal distribution. Round your answers to 4 decimal places. (a) 1.12 and 1.98 (b) –2.12 and –1.0
March 28, 2010

Business Law
Business Law Exam 210 True Or False questions. 1. Both "commom law: contracts and UCC contracts are subject to the plain menaing rule only if they are simple and plain contracts. 2.when a term in a contract is ambiguos, it is generally interpreted in favor of the party ...
March 27, 2010

physics
Two parallel wires which carry currents I1 = 69 A and I2. The top wire is held in position, the bottom wire is prevented from moving sideways but can slide up and down without friction. If the wires have a mass of 5.3 g per metre of length calculate current I2 such that the ...
March 22, 2010

Chemistry
How much energy will be released when 11.11g of calcium chloride dissolves in 100 mL of water. deltaHf of Ca 2+ (aq)=-543Kj/mol, deltaHf of Cl 1-(aq) = -167Kj/mol CaCl2(s) ==> Ca 2+(aq) + 2Cl 1-(aq)
March 4, 2010

statistics
An experiment consists of rolling a die and selecting a marble from a bag. the bag has 7 orange, 3 pink, and 6 grey marbles. What is the probability of rolling a multiple of 3 and selecting a pink marble? Anwer: The two events are independent of each other, therefore we ...
March 2, 2010

Physics
Assuming I did it correctly: F=ma mass = the mass of the electron = 9.11 * 10^-31 kg a= 115 m/s plug in your known variables F will equal 1.05 * 10^-28 Newtons (N) Next, F=qE q equals the charge of the electron, or "point charge". q=1.6 * 10^-19 C Solve for E, so E=F...
March 1, 2010

Math
A coin bank contains only nickels,dimes, and quarters. the value of the 19 coins in the bank is $2.00. There are twice as many nickels as dimes. Find the number of each type of coin in the bank. How do I solve this?
February 24, 2010

Mathematics
is it 4 liter???
February 24, 2010

Math
A coin bank contains only nickels,dimes, and quarters. the value of the 19 coins in the bank is $2.00. There are twice as many nickels as dimes. Find the number of each type of coin in the bank. How do you solve this?
February 24, 2010

Chemistry
false
February 23, 2010

psych
At the end of the article they did do an experiment?
February 14, 2010

psych
Does the study in the article below use the experimental method or the correlation method and why? I'm stuck and keep going back and fourth on it Soccer Referees Hate the Tall Guys Many of soccer's greatest players have been small fries. Diego Maradona is only 5'5&...
February 14, 2010

chemistry
How many atomic orbitals are formed duing a pi bond between p two orbitals? Does the pi bond count as another orbital? Im confused if the answer is 3 or 2? can someone help me :(
February 7, 2010

Algebra
C=z+zse
February 5, 2010

math
A pencil, eraser, and notebook cost $1 in total. A notebook costs more than 2 pencils, 3 pencils cost more than 4 erasers, and 3 erasers cost more than a notebook. How much does each item cost?
February 4, 2010

Math
How many milliliters of a 75% acid solution must be added to 90 ml of a 10% acid solution to make a 25% acid solution?
February 3, 2010

math
How many milliliters of a 75% acid solution must be added to 90 ml of a 10% acid solution to make a 25% acid solution?
February 3, 2010

PUBLIC POLICY DEVELOPMENT IN HEALTH & HUMAN SERVIC
THIS IS THE ANSWER THAT i HAVE COME UP WITH PLZ TELL ME WHAT YOU THINK....I feel that we can use the same problem analysis for both historical and modern problems because although we have come a long way we can still learn from history and the problems in today's society ...
January 26, 2010

PUBLIC POLICY DEVELOPMENT IN HEALTH & HUMAN SERVIC
Why are we able to use the same problem analysis categories mentioned in Ch. 1 of Social Policy and Social Programs to analyze historical problems as well as problems facing modern society? I have read the whole chapter and I still can not find the answer to this question can ...
January 26, 2010

science
air pressure changes whats the effect of that
January 25, 2010

Physics
Thank you!!! :)
January 18, 2010

Physics
I don't see the solution posted to "ucieng". Where can I find it? Thanks
January 18, 2010

Physics
An iron bolt of mass 70.0 g hangs from a string 31.3 cm long. The top end of the string is fixed. Without touching it, a magnet attracts the bolt so that it remains stationary, displaced horizontally 23.0 cm to the right from the previously vertical line of the string. a)find ...
January 18, 2010

chemistry
How many grams of NaCl do you have if you have 2.30 x 10 to the 23rd olecules of salt?
January 12, 2010

Chemistry-Balancing Equations
I need help balancing equations. _C7H60+_02->_C02+_H20 I don't know how to balance it because when i do it just won't work out ill have too much on one side and it just wouldn't work. i know im missing a rule or something.
January 12, 2010

Chemistry
How many grams of carbon dioxide are produced if you react 200g of benzaldehyde reacr with 32g of oxygen? its stoichiometry, i have no idea how to do this...
January 12, 2010

Math
1/5
January 10, 2010

APUSH
Asses the Validity of the fallowing statement: "Reconstruction failed to bring economic success to former slaves."
January 4, 2010

geometry
Find the complement of „£B.
December 12, 2009

Math-Statistics
For a standard normal curve, find the z-score that separates the bottom 90% from the top 10%.
December 9, 2009

math-test statistic
If we have a sample of 12 drawn from a normal population, then we would use as our test statistic A) z0 with 11 degrees of freedom B) t0 with 12 degrees of freedom C) z0 with 12 degrees of freedom D) t0 with 11 degrees of freedom
December 5, 2009

math
Is the rate 3/4 cup of butter /6eggs equal to the rate 9 cups of butter/73eggs
November 24, 2009

math
Find the best buy on cashews (1lb is 16oz), a) 1lb for $6.09 B. 10oz for $4.59 C. 1lb 4oz for $7.09 D. 12oz for $5.09
November 24, 2009

CRT 205
A(n)_____ is a set of claims intended to support or prove a conclusion.
November 22, 2009

Chemistry
I ran into the same issue, to me determining the KWH is simple, multiply current+Volts* hrs used and you will get KWH. But for some reason the answer that they have given is the energy requirement for a single reaction so here is how you figure it. kwh=(nfE)/(3.6e6 * ...
November 18, 2009

statistics
Health Care: Flu Based on data from the Statistical Abstract of the United States, 112th Edition, only about 14% of senior citizens (65 years old or older) get the flu each year. However, about 24% of people under 65 years old get the flu each year. The general population ...
November 11, 2009

Math
The Tao Inc. purchased an asset for $170,000 with a salvage value of $8,500 have a useful life of four years. Find the depreciation expense for the first year using the 150% declining balance method.
November 10, 2009

math
List two relationships that are true about pairs of sides or angles or diagonals in a. a parallelogram. b. a rectangle. c. a rhombus.
October 30, 2009

math
a. If you begin with a right triangle with sides a, b, and c and decrease the right angle so it is an acute angle, how does compare with ? b. Answer this question for the situation where you increase the right angle so that it is obtuse. I have to use a formula to show the ...
October 30, 2009

math
4x+10=
October 30, 2009

5th grad math cubic units
12
October 26, 2009

math/graphing
The number of accidents that occur at the intersection of Pine and Linden streets between 3 p.m. and 6 p.m. on Friday afternoons is 0, 1, 2, or 3, with probabilities of 0.84, 0.13, 0.02, and 0.01, respectively. Graph this probability distribution. What is the expected value ...
October 22, 2009

probability
Five numbers are to be picked, without repetition, from 44 numbers to determine the winner of the Fortune Five game in the state lottery. If the order of the numbers is insignificant, how many different ways can a winning quintuple be selected? What is the probability of winning?
October 21, 2009

math/probability
A jar contains four marbles, each a different color: red, blue, green, and yellow. If you draw two marbles from the jar, one after another, replacing the first before drawing the second, what is the probability of getting a. two red marbles? b. a red marble on the first draw ...
October 21, 2009

math
The mean systolic blood pressure of adult males is normally distributed with a mean of 138 (millimeters of mercury) and a standard deviation of 9.7. What percent of adult males have blood pressure between 161.28 and 164.9?
October 21, 2009

math157
The number of accidents that occur at the intersection of Pine and Linden streets between 3 p.m. and 6 p.m. on Friday afternoons is 0, 1, 2, or 3, with probabilities of 0.84, 0.13, 0.02, and 0.01, respectively. Graph this probability distribution. What is the expected value ...
October 21, 2009

misconception?
A student asks, “What’s wrong with the argument that the probability of rolling a double 6 in two rolls of a die is 1/3 because 1/6 + 1/6 = 1/3? ”Write an explanation of your understanding of the student’s misconception.
October 21, 2009

probability
Five numbers are to be picked, without repetition, from 44 numbers to determine the winner of the Fortune Five game in the state lottery. If the order of the numbers is insignificant, how many different ways can a winning quintuple be selected? What is the probability of winning?
October 21, 2009

math fair
How did you get $3.50?
October 21, 2009

math fair
The game of dots is played by rolling a fair die and receiving $1 for each dot showing on the top face of the die. What cost should be set for each roll if the game is to be considered a fair game?
October 21, 2009

math
The game of dots is played by rolling a fair die and receiving $1 for each dot showing on the top face of the die. What cost should be set for each roll if the game is to be considered a fair game?
October 21, 2009

science
What are examples of alternatives to natural resources? I know of vegetable oil to replace fuel, but what else? Thanks.
October 20, 2009

Philosophy
If this is the for the same class I am in you have to concentrate on the Philosophers mentioned in Chapter 8, this is the period after day 1850.
October 4, 2009

Macroeconomics
A) Suppose that as the economic recovery strengthened consumer expectations of annual inflation increased from 2% to 3.5 % and, at the same time, the expected real rate of return required to equate investor demand to the existing supply of 1 year Treasury notes increased from ...
October 1, 2009

CHEMISTRY
I dont understand 3a and 3b. I dont understand how you do that
September 27, 2009

physics
2.2
September 26, 2009

algebra
I have a word problem in my homework that confuses me. How long is 1 billion seconds simplified into years then months then days, etc. Years then months then days as in xx years xx months and xx days to count to 1 billion seconds. Just one answer not an answer each for years, ...
September 24, 2009

space
what is the science behind space
September 22, 2009

Science
hey there can someone please help me answer the question - Explain the advantages and disadvantages of DNA mutating Thankyou
September 21, 2009

4th grade
Go on a big number hunt.Find at least one number greater than 100,000.Findat least one number greater than a 1,000,000.Hint:look in a on-line .Record the number below and write at least 2 sentences to describe what each one is about? That's all the information I have.......
September 16, 2009

4th grade
find at least one number greater than100,000?find at least one number greater than 1,000,000
September 16, 2009

Physics
A dog that can swim at 1.0 m/s jumps in a river that is flowing 3.0 m/s at an angle of N60*E. Solve the resultant velocity vector of the dog if he heads north. What direction is the dog acutally heading? can someone please help thanks
July 20, 2009

math
thanks i got now the car cost 2.50
July 2, 2009

math
nevermine i can't how can u find b
July 2, 2009

math
yeah i can thanks
July 2, 2009

math
The total toll charge for 1 car and 5 bicycles to cross a bridge is $7.50. The toll for a car is $1.50 more than for a bicycle. Find the cost for a car to cross the bridge.
July 2, 2009

Chemistry
thank you sooo much
July 2, 2009

Chemistry
Liquid methanol (CH3OH) is combusted in oxygen gas to yield carbon dioxide gas and liquid water Okay I keep getting this: CH3OH(l) + 1.5 O2(g) > CO2(g) + 2 H2O(l) the website tells me I'm wrong, but I dont know how to go about with out using fractions. Please help. Thanks
July 2, 2009

Math
April buys eight books for $44. Paper back books cost $4 and hard back books cost $8. How many of each book did she buy?
July 1, 2009

math
E(t)=80.6t+81.0 and E(10)= 85.9 is what I came with which I guess you are saying that it is wrong thanks I will try to rework the problem
June 30, 2009

math
in 1994 the life expectancy of malews in a certain country was 70.9 years. In 1998 it was 73.6 years. Let E represent the life expectancy in year t and let t represent the number of years since 1994 The linear functionE(t) that fits the data is E(t)= 80.6t+81.0 Use the ...
June 30, 2009

math
find the slope and the y-intercept f(x)=-7x-2 the slope is -7 the y-intercept is(0,-2) is this correct?
June 29, 2009

math
solve -16<4x-5<-4 the solution is -11/4<x<1/4 is this correct?
June 29, 2009

math
use the distributive property to help you solve the equation 9(w-2)=45 w=7 is this correct?
June 29, 2009

math
solve using multiplication -6x>1/13 The solution is < -1/78 is this correct?
June 29, 2009

math
solve by substitution 7x+6y=7 x=58-9y What is the solution of the system? (7,-5) is this correct?
June 29, 2009

math
5/8x+1/16x=7/16+x the solution is x=-7/5 is this correct?
June 29, 2009

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