Questions Asked on
July 18, 2012

Chemistry
About 13% of the acid in a 0.10M solution of a weak acid dissociates to form ions. What is the H3O+ concentration? What is the OH concentration? What is the pH of the solution?
asked by Sara 
math
Total hours: 42 (including 4 hrs sick leave, 6 hrs travel) Week 2 — Total hours: 46 (including 5 hrs travel)What percentage of the recorded time did the worker spend traveling?
asked by nita 
math
Suppose you are looking to buy a $5000 face value 26week Tbill. If you want to earn at least 1% interest, what is the most you should pay for the Tbill?
asked by mary 
Physics
A 2600 kg truck traveling at 72 km/h slams on the brakes and skids to a stop. The frictional force between the truck and the road is 8200 N. Calculate the mechanical work required to stop the truck and the distance the truck travels before stops.
asked by Jack Hill 
math
suppose you are looking to buy a $5000 face value 26 week Tbill. If you want to earn at least 1% interest what is the most you should pay for the Tbill
asked by Anonymous 
Physics
Consider the following four possibilities for two point charges and choose the one(s) that do not change the magnitude of the electrostatic force that each charge exerts on the other: A. Double the magnitude of each charge and double the separation between
asked by Patrick 
Chemistry
A) A compound distributes between water (solvent 1) and benzene (solvent 2) with Kp = 2.7. If 1.0g of the compound were dissolved in 100mL of water, how much compound could be extracted by three 10mL portions of benzene? B) If the value of Kp is 0.5 for
asked by Anonymous 
physics
Jason applies a force of 4.00 newtons to a sled at an angle 62.0 degrees from the ground. What is the component of force effective in pulling the sled horizontally along the ground?
asked by Jay 
Algebra
A plane traveled 580 miles to Anakara and back. The trip there was with the wind. It took 5 hours. The trip back was into the wind. The trip back took 10 hours. Find the speed of the plane in still air and the speed of the wind.
asked by Taurus 
maths
Ten blackberry plants started growing in my yard. Absent constraint, blackberries will spread by 200% a month. My yard can only sustain about 50 plants. Using the logistic growth model, a. Write a recursive formula for the number of blackberry plants in my
asked by mary 
maths
Marie can afford a $250 per month car payment. She’s found a 5 year loan at 7% interest. a. How expensive of a car can she afford? b. How much total money will she pay the loan company? c. How much of that money is interest?
asked by colin 
math
Use a table of trigonometric values to find the angle è in the right triangle in the following problem. Round to the nearest degree, if necessary. cos è = 0.8192 A = 45 H =?
asked by Taylor 
math
A native wolf species has been reintroduced into a national forest. Originally 200 wolves were transplanted. After 3 years, the population had grown to 270 wolves. If the population grows exponentially, a. Write a recursive formula for the number of wolves
asked by Anonymous 
chemistry
The normal boiling point of ethanol is 78.5C. Using the following information: delta H formation (C2H5OH (g))= 234.38 kJ/mol determine the enthalpy of vaporization of ethanol. I know it should be around 39.3 according to a table in my textbook, however, I
asked by Kellie 
maths
You deposit $10,000 in an account earning 4% interest compounded monthly. a. How much will you have in the account in 25 years? b. How much interest will you earn?
asked by mary 
Chemistry
C3H8 + 5O2 > 3CO2 + 4H2O what are the oxidation #'s of each? What is being oxidized? reduced? Please explain
asked by Me 
Math
Solve for the length of the unknown side in the following right triangle. (Side AC is the hypotenuse.) Round your answer to two places, where applicable. Side AB ? Side BC=12 Side AC=19
asked by Jim 
maths
The population of the world in 1987 was 5 billion and the annual growth rate was estimated at 2 percent per year. Assuming that the world population follows an exponential growth model, find the projected world population in 2015.
asked by Anonymous 
Chem
How long must a current of 1.20 A pass through a sulfuric acid solution in order to produce 25.0 mL of H2 gs at 25 degrees C and 1 atm pressure?
asked by Josh 
US History
1.Which of the following statements about Woodrow Wilson is true? A) He wanted to place strict government controls on corporations. B) He overturned discriminatory laws against African Americans. C) He advocated eliminating the income tax. D) He opposed
asked by victoria 
Science
container factory uses a 450 W motor to operate a conveyor belt that lifts containers from one floor to another. To lift 250 1kg containers a vertical distance of 2.4 m, the motor runs for 45 s. What is the efficiency of the motorized conveyor system?
asked by Jack Hill 
chemistry
How many moles of NaOH must be added to 1.00L of this solution to increase the PH to 9.25?
asked by Heather 
Science
A car's engine is only 12% efficient at converting chemical energy in gasoline into mechanical energy. If it takes 1.8 x 104 N of force to keep the car moving at a constant speed of 21 m/s, how much chemical energy would be needed to move the car a
asked by Rob 
maths
How much would you need to deposit in an account now in order to have $20,000 in the account in 4 years? Assume the account earns 5% interest.
asked by colin 
Chemistry
How much 0.300 M NaOH is required to completely neutralize 30.0 ml of 0.15 M HClO4 Clue: M1V1=M2V2
asked by Ann 
maths
You deposit $1000 each year into an account earning 8% compounded annually. a. How much will you have in the account in 10 years? b. How much total money will you put into the account? c. How much total interest will you earn?
asked by colin 
chemistry
1) a student used 3.50 g of salicylic acid. calculate theoretical yield 2) the actual yield (from experiment) was found to be 1.50 g less than the theoretic yield (mass), calculate the percent yield 3) t
asked by ama 
History.
How did the role of the federal government change during the Progressive Era of the early 1900s. Include specific progressive legislation, discuss presidents and the enhanced power of the federal I need some help with finding some information and
asked by Katie 
Science
A car's engine is only 12% efficient at converting chemical energy in gasoline into mechanical energy. If it takes 1.8 x 104 N of force to keep the car moving at a constant speed of 21 m/s, how much chemical energy would be needed to move the car a
asked by Bob 
Physics
There are four charges, each with a magnitude of 2.65 microcoulombs. Two are positive and two are negative. The charges are fixed to the corners of a 0.408m square, one to a corner, in such a way that the net force on any charge is directed toward the
asked by JJ 
US Government
Why do we have more safeguards for accused criminals than the victims themselves?
asked by alex 
Updated Math Question
The radius of circle A is 9 times greater than the radius of circle B. Which of the following statements is true? A.The area of circle B is 9 times greater than the area of circle A. B.The area of circle A is 9 times greater than the area of circle B C.The
asked by Kim 
Calc
After its fastest rate of growth ever during the 1980s and 1990s, the rate of growth of world population is expected to slow dramatically in the twentyfirst century. The function G(t) = 1.58e−0.213t gives the projected annual average percent population
asked by Jim 
math
you deposit $10000 in an account earning 4% interest compounded monthly. how much will you have in 25 years? how much interest will you earn
asked by Anonymous 
physics
A 5 g bullet is fired into a 2 kg wooden block attached to a spring with a force constant of 20 N/m. It lodges in the block, and the block and bullet compress the spring until they come to a rest. If the bullet was moving at 1000 m/s just before the
asked by shawn 
geometry
Find the similarity ratio and the ratio of perimeters for two octagons with area 18 square inches and 50 square inches
asked by larry 
Physics
A student applies a force of magnitude 39.0 N at an angle of 22.6o with the horizontal to push a 4.00kg textbook 1.00 m across a table from rest to a final speed of 1.75 m/s. Find the work done by friction on the textbook.
asked by Rob 
physics
A vertically hanging spring has a mass of 50 N hanging from it. Under these conditions, the spring stretches 10 cm. The spring is then placed on a horizontal table and stretched 20 cm. What force is required in the second scenario?
asked by kyle 
Physics
The force of gravity on the moon is said to be 1/6th of that on the earth .what would be the mass of 12kg weighed on the surface of the earth and moon
asked by Bhumika Gireesh 
History
Social Darwinists believed that A) a large empire was the key to economic growth. B) the best country would win any international competition. C) each nation should be made up of only one ethnic group. D) military might was the most important measure of a
asked by Anonymous 
Chemistry
How much 0.300 M NaOH is required to completely neutralize 30.0 ml of 0.15 M HClO4 Clue: M1V1=M2V2 I still don't get it to i times .300x30.0 then times .300 x.15 i just don't understand what i am actually suppose to multiply
asked by Ann 
critical thinking
Please post a substantive response to the following discussion questions by clicking on Reply: Think about the following stereotype. Would they invoke the same kind of images for everyone? Which are negative and which are positive? How do you think they
asked by Anonymous 
maths
How much money will I need to have at retirement so I can withdraw $60,000 a year for 20 years from an account earning 8% compounded annually? a. How much do you need in your account at the beginning b. How much total money will you pull out of the
asked by colin 
Chemistry
so would my answer be 15ml How much 0.300 M NaOH is required to completely neutralize 30.0 ml of 0.15 M HClO4 Clue: M1V1=M2V2
asked by Ann 
Statisics
The state lottery claims that its grand prize is $1 million. The lucky winner will receive $50,000 upon presentation of the winning ticket plus $50,000 at the end of each year for the next 19 years. Why isn't this really a milliondollar prize? What would
asked by Val 
Macro economics
Suppose that the residents of Veggieland spend all of their income on cauliflower, broccoli, and carrots. In 1998 they buy 100 heads of cauliflower for $200, 50 bunches of broccoli for $75, and 500 carrots for $50. In 1999 they buy 75 heads of cauliflower
asked by Anonymous 
English
Instead of toilet training her son at 18 months of age as her mother recommends, Melissa is waiting until her son is emotionally ready to begin toilet learning. How will Melissa know when her son is emotionally ready?
asked by Bella 
Calc
The percentage of a certain brand of computer chips that will fail after t years of use is estimated to be P(t) = 100(1 − e−0.1t ). What percentage of this brand of computer chips are expected to be usable after 6 years? (Round your answer to one
asked by Jim 
geometry
determine the coordinates of the midpoint of the line segment whose endpoints are A(0, 2, 4) and B(8, 2, 6)
asked by Bread 
algebra
At an auto show, a car dealer asked the first 10 visitors their ages and the kinds of cars they own. The Venn diagram shows the details. A Venn diagram titled Ages of Car Owners, indicating the ages of owners of each type of car. Each of the three circles
asked by Anonymous 
Calculus
Find the point on the graph of function that is closest to the point. f(x)=x^2 (2,1/2)
asked by Elizabeth 
statistics
So if a scale has 30 items in it, and if an individual gets a score of 20 what does this mean? The only way to answer this is to look at the standardization sample, find out what the mean score in the sample was, let's say 15, and standard deviation in the
asked by phil 
Chemistry
What is the HCl concentration if 72.1ml of 0.035M NaOH is required to titrate a 20.0ml sample of the acid?
asked by Sara 
Physics
container factory uses a 450 W motor to operate a conveyor belt that lifts containers from one floor to another. To lift 250 1kg containers a vertical distance of 2.4 m, the motor runs for 45 s. What is the efficiency of the motorized conveyor system?
asked by Rob 
chemistry
3) The melting point range of an unknown substance was determined to be 120180 degree celcius. what can you tell about the purity of the unknown
asked by ama 
english
Do you think that paying attention to your audience, purpose, and content improves the influence of your writing? Why or why not?
asked by ann 
Healthcare Finance
Metropolis Health System has received a wellness grant from the charitable arm of an area electronics company. The grant will run for twentyfour months, beginning at the first of the next fiscal year. Two therapists and two registered nurses will each be
asked by Brenda 
MAth
What is the area of a parallelogram with a base of 25 meters and a height of 8 meters?
asked by shailene 
Trigonometry
Find the value of x on this right triangle when a=20 b=5x10 and c=2x(Square root of 5) A. x = 15 B. x = 10 C. x = 12 D. x = 16 A wheel 5.00 ft in diameter rolls up a 15.0° incline. How far above the base of the incline is the top of the wheel after the
asked by Anonymous 
Calc
Compute the derivative of f(x)=5^x^2+1 using logarithmic differentiation.
asked by Jean 
Physics
A 1.20kg ball is rolled down a frictionless ramp whose top is 0.80m above a horizontal spring with ks = 800N/m. The ball reaches the horizontal just in front of the spring. a.) What is the kinetic energy of the ball just before it contacts the spring? b.)
asked by Lauren 
statistics
So if a depression scale has 30 items in it, and if an individual gets a score of 20 what does this mean? The only way to answer this is to look at the standardization sample, find out what the mean score in the sample was, let's say 15, and standard
asked by phil 
statistics
If the null hypothesis for the example survey posted is "There is no correlation between level of drug use and satisfaction with one's personal life." What are the three possible alternative hypotheses that could be stated, using only the variables and
asked by Trip 
math
The lengths of two adjacent sides of a square are represented by 5x+11 and 7x3. What is the perimeter of the square?
asked by Tempie 
maths urgent please
Hi, a particle is moving in simple harmonic motion such that a = 4x. ( x in metres, t in seconds) Find the maximum speed at which the particle is travelling. Velocity = 6cos2t. My teacher said to put t = 0 and sub it into velocity equation above, but I
asked by Michelle 
Law
Why do some believe cell phone while driving should be banned? how is it any different than talking to the people on the passenger's side or driving with you?
asked by Jazme 
Ethics
you have examined four approaches to explaining criminal behavior: classical, positivist, structural, and ethical. Select and research one of those approaches. Identify the strengths and weaknesses of your selected approach. Explain whether you think the
asked by Rose 
calculus derivatives update
update yes, sorry I wrote it wrong (mx)= (x^55x^3 +7x4)^10 * (4x^9 +19)^23 Thanks again
asked by cathy 
Accountinhg
A difficult problem in calculating the total costs and expenses of a department is: Determining the gross profit ratio. Assigning direct costs to the department. correct Assigning indirect expenses to the department. Determining the amount of sales of the
asked by Anonymous 
Statistics
Measurements on the percentage of enrichment of 12 fuel rods used in a nuclear reactor were reported as follows; 3.11 2.88 3.08 3.01 2.84 2.86 3.04 3.09 3.08 2.89 3.12 2.98 a. Test the Hypothesis H0: µ = 2.95 versus H1: µ 0 ≠ 2.95, and draw appropriate
asked by Josh 
math
Issa IS driving to the airport to catch a flight to Miami, and Her arrival depends on traffic. If the traffic is light, then she can drive 60 mph and arrive at the airport 1 hour early. If traffic is heavy, she can drive 35 mph and arrive at the airport on
asked by Jane 
Physics
container factory uses a 450 W motor to operate a conveyor belt that lifts containers from one floor to another. To lift 250 1kg containers a vertical distance of 2.4 m, the motor runs for 45 s. What is the efficiency of the motorized conveyor system?
asked by Rob 
Math
Through (4, 3), m =  3 A) y = 3x+1/15 B) y = 1/3x + 15 C) y = 3x + 15 D) y = 3x  15
asked by chchch 
Sociology
What are the implications of a dual relationship? I don't need the answer, I just need to know what the question means by "implications". Like consequences??? Thanks
asked by Bee 
Trig/Physics
Joe walks 5 miles in the direction degrees North of East, and then 10 miles in the direction 20 degrees West of North. (a) How far is Joe from his starting position? (b) In what direction is Joe from his starting position?
asked by Nycw 
gemetry
An identification code is to consist of two letters followed by six digits. How many different codes if repetition is permitted.
asked by angela 
physics
A man on the top of a 40 meter tower directly overhead the road is watching a car moving on a straight road. The car speed makes an angular velocity with respect to the observer in a constant speed of 0.16radian/sec. Find the linear velocity of the car
asked by pam 
math
sin è=? O=8 H=16
asked by ashley 
english
Identify a serious error you find challenging to overcome in your own writing. What method will you use to avoid this error? Would you recommend the method to others? Why or why not?
asked by ann 
Penn
WiFi stands for
asked by Hall 
Finance
gross profit gross margin is equal to
asked by Tamika 
Chemistry
If 50.0 mL of methane gas at 75.5 degrees C is cooled to 5.45 degrees C, what would be its new volume?
asked by Bailey 
Calculus
f(x)= 5ln(x)/x^7
asked by Tara 
Physics
A student applies a force of magnitude 39.0 N at an angle of 22.6o with the horizontal to push a 4.00kg textbook 1.00 m across a table from rest to a final speed of 1.75 m/s. Find the work done by friction on the textbook.
asked by Smith 
algebra 1
joan builds a deck where the length is three times the width. if the perimeter is 64 feet what is the length of the deck.
asked by humza 
physics
At the grocery store, you place some produce onto a scale that has a vertically hung spring supporting the produce. The spring has a spring constant of 16 N/m. Your produce bobs up and down with an amplitude of 20 cm, and the maximum speed it reaches is
asked by shawn 
chemistry
why is it unwise to boil the oxolate solution in preparation for it's titration with permanganate
asked by ama 
Economics
Trade unions and Employer Organisations, Analyse the reasons for their opposition to the new industrial relations laws.
asked by Susan 
sciences
i want to become amember of young scientist association in my school. But for this i must give an idea of any science project . Please help me
asked by edward 
English
Hi, I am writing an essay about "Disneyfication" of folktales, and I searched for quotes and resources but I didn't find any useful information. I really need help in finding quotes and resources about "Disneyfication" of folktales.
asked by zee 
Geometry
Determine the distance between A(1, 2, 3) and B(4, 5, 6) to the nearest tenth
asked by Bread 
Math
Solve: 3^x^2 : 3^x = 9 : 1
asked by Mayank 
Macro Economics
Explain carefully the meaning and importance of the term “productivity”
asked by Anonymous 
Macro Economics
If in 1984, measured GDP in Canada was $400 billion, and in 1985 it was $440 billion, explain why we cannot necessarily conclude that the typical Canadian's welfare has improved by 10percent over the year.
asked by Anonymous 
math/derivatives
Please compute the derivative for g(x)= sqrt x  3/x squared. I know the derivative for sqrt x = x ^1/2
asked by bobbo 
math/calc
How do I solve for an area under the curve when y = x^2 and solve for above the interval (1,2) ? Any resources where I could see examples would be helpful. Thanks!
asked by cathy 
Math
The radius of circle A is 9 times greater than the radius of circle B. Which of the following statements is true?
asked by Kim 
calculus/derivatives
I need to find the derivative and can't do them when they are raised to powers? Thank You. m(x)x^5  5x^3+7x 4)^10 (4x^9 +19)^23 this on is tuff!
asked by cathy 
science
10 name of acid and alkalies and there uses
asked by hassan 
algebra
which of the followings is another root f(x)=x^34x^2+14x20
asked by jessica hernandez 
English
Can any one help me with the class foundations of curriculum?
asked by Bella 
Algebra
Paint Express charges $30 per gallon of paint plus $1.10 per square foot of wall space. Color Creations charges $24 per gallon of paint plus $1.20 per square foot of wall space. Robert estimates he will need four gallons of paint for the rooms he’d like
asked by Veronica 
math grade 12
i need to know the mathematical model for finding the cooling of a hot liquid. and what the letters mean. pls help thanks
asked by ted 
math
how do you solve by gaussian elimation 2x+y=3 3x2y=1
asked by tasha 
math
need two words....How can I multiplu if I have groups that are?
asked by Di Angelo 
college chemistry
formt he diluted unknown concentration which i found to be 1.50mg/L i have to calculate the [Fe] in the PRIMARY unknown solution... that is placed in a 250mL volumetric flask
asked by Anonymous 
Marh
How many 3/4foot pieces of ribbon in 30 feet
asked by Anonymous 
Algebra
Whatis an "undefinded" matrix? Please give an example.
asked by Taurus 
Business Calculus
Determine the intervals where f(x)=e^x^2/2 is increasing and decreasing
asked by Jean 
Statistics
cant tell if i am on right track for this prababilitly hw assigment help would good! I was recently given a hw assigment dealing with the price is right's "money game". The contestant is shown nine cards on a board. Each card has one pair of numbers. One
asked by Mike jenkins 
Math
Given the linear equation 5y = 3x + 19, find (a) the slope of a line perpendicular to the given line. (b) the slope of a line parallel to the given line. A. (a) 5/3 (b) 3/5 B. (a) 3/5 (b) 5/3 C. (a) 5/3 (b)3/5 D. (a) 3/5 (b)5/3
asked by chchch 
Math
x + 8 = 0 A) Undefined B) 1 C) 8 D) 0
asked by chchch 
Math
contains (10, 8) with undefined slope A) x = 8 B) y = 8 C) x = 10 D) y = 10
asked by chchch 
Math
complete the ordered pairs x = 2y  8 ( , 0), (0, ),{ ,1/2} A) (4, 0) , (0, 8),{17/4,1/2} B) (8, 0), (0,  4) , {9,1/2} C) (0, 0), (0, 0), {1,1/2} D) (8, 0), (0, 4) , {7,1/2}
asked by chchch 
math
Angle A 45° Angle B 45° Angle C ?
asked by JAYCE 
Math
which interval notation would go with this equation 5(4x  14) ≥ 25x + 35 A) {xx < 7}; (∞, 7) B) {xx ≤ 7}; (∞, 7] C) {xx > 7}; (7, ∞) D) {xx ≥ 7}; [7, ∞)
asked by chchch 
work
Read the scenario. Use the reference material to assist you in determining what tasks to select for your squad to support the critical tasks identified for the platoon. 1. You are a member of Special Troop Battalion, 3d BCT, 10th Mountain Division. Your
asked by Anonymous 
critical thinking
Hi Everyone! Please post a substantive response to the following discussion questions by clicking on Reply: Euphemisms: seek to mute the disagreeable aspects of something or to emphasize its agreeable aspects Advertisers, even the media, will use
asked by Anonymous 
math30
LOGARITHMS AND EQUATION SOLVING Solve for x. Round to the nearest hundredth. 2^(x+3) = 17^(x)
asked by alejandro 
chemistry
Hello, this question is purely out of curiosity, please help to enlighten me. A hot water bag (one of those rubber ones with the rubber stopper at the top you screw in) was hidden under my bed for about a month. It was filled with a bit of water and folded
asked by mary 
Physics
A comet orbits the Sun with a period of 72.0 yr. (a) Find the semimajor axis of the orbit of the comet in astronomical units (1 AU is equal to the semimajor axis of the Earth's orbit). (b) If the comet is 0.60 AU from the Sun at perihelion, what is its
asked by James