Questions Asked on
June 25, 2013

Math
I have a question my brother asked me but I need a math expert. You have two interlocking circles and the radius of circle B goes through the center of circle A and of course the radius of circle A goes through the center of circle B. The radius of each
asked by DrBob222 
Discreet math
[(pvq)^(p=>)^(q=>)]=>r[(pvq)^(p=>)^(q=>)]=>r
asked by James 
Maths
You have seven balls labelled 1,2,…,7 and seven unlabelled, indistinguishable boxes. How many different ways can the balls be placed into the boxes? Can anyone please work the complete solution. I got the answer but it was solved by my brother and he
asked by Satyam 
English
What is the different between traditional Vietnamese and Vietnamese tradition?
asked by James 
Psychology
"The role of religion is paradoxical. It makes prejudice and it unmakes prejudice." Do you agree, and, if so, why might this be true?
asked by jamya 
math
ABC is a triangle with AC=139 and BC=178. Points D and E are the midpoints of BC and AC respectively. Given that AD and BE are perpendicular to each other, what is the length of AB?
asked by anonymous 
physics
one kg of a diatomic gas is at a pressure of 80000N/meter sqare .the density of the gas is 4kg/meterqubie.what is the energy of the gas due to its thermal motion?
asked by sagar kumar 
math
express each answer in exponential form using the indicated bases 4x4x4x4,base 2
asked by joey 
Chemistry
How do I calculate this? How many grams of CaCl2 is in 500 mL 0.1 M solution of CaCl2
asked by Kate 
Chemistry
A reference solution is to be prepared with 5 PPM parabenzopyrene (molecular weight = 252). The quantity of parabenzopyrene required for preparing one litre 5 PPM solution is (A) 252 mg (B) 25.2 mg (C) 5 mg (D) 252 g
asked by rohit 
CHEMISTRY(URGENT PLEASe)
CONVERT : 1.67KG =___MG 2.70MM=___KM 3.55 DAYS=___MINS 4.37 FAHRENHEIT=___KELVIN BETTER IF WITH SOLUTIONS PLEASE AND HOW TO DO PLEASE
asked by Dishea 
Mathematics
If a man and a half finishes a job and a half within a day and a half, how many men can finish 3 jobs within 3 days. Please I need help, I am not so sure with my answer of 6. I would like to verify it. THANKS
asked by xavier 
MIT 2.01X
We will obtain bending moment diagrams for three beams and calculate stresses inside the beams. For each beam, take the xaxis along the neutral axis of the beam, oriented from left to right, with origin at A. HW7_1A_1 : 5.0 POINTS For the beam above,
asked by Uncle SAM 
Calculus
Find dy/dx by implicit differentiation for the following 2x^2y+3y=1
asked by Emma 
Eng
Which statement is most accurate regarding the speakingwriting connection? A. To own a word, write it over and over again. B. Written words seldom reflect the words people use when they speak. C. To own a word, speak it. D. The words used by writers are
asked by Jen 
Calculus
Find dy/dx by implicit differentiation: cos(x−y)=−4xe^x
asked by Emma 
Physics
A small coin is inside a bowl. The bowl is a surface of revolution of the curve y=100x4 m−3. This coin slides around the inside of the bowl at a constant height of y=0.01 m above the bottom of the bowl. What is its angular velocity in rad/s? please just
asked by K 
math
The corrosive effects of various soils on coated and uncoated steel pipe was tested by using a dependent sampling plan. The data collected are summarized below, where d is the amount of corrosion on the coated portion subtracted from the amount of
asked by tracy10 
Eng
Which of the following would be an appropriate way to add variety to your sentence? A. Make your sentences read like a spoken conversation. B. Use more closeup words. C. Use questions and answers together. D. Add personal anecdotes. Answer is C
asked by Jen 
math help
Complete the hypothesis test with alternative hypothesis ƒÊd ‚ 0 based on the paired data that follows and d = O  Y. Use ƒ¿ = 0.01. Assume normality. Oldest 188 174 192 196 65 Youngest 186 168 199 199 69 (a) Find t. (Give your answer correct to
asked by tracy10 
math
Consider the following bivariate data. Point A B C D E F G H I J x 3 4 2 1 7 2 1 0 4 2 y 1 7 3 3 6 6 5 0 6 2 (a) Construct a scatter diagram of the given bivariate data. (Do this on paper. Your instructor may ask you to turn in this work.) (b) Calculate
asked by tracy12 
math
Consider the following set of data. (18, 12), (29, 48), (65, 29), (82, 24), (115, 56), (124, 13) (a) Calculate the covariance of the set of data. (Give your answer correct to two decimal places.) Incorrect: Your answer is incorrect. . (b) Calculate the
asked by tracy12 
Physics
5kg rock is dropped into a well and a splash is heard after 3 seconds , how deep is the well? Ignore air resistance
asked by Ali 
Math
A vehicle covers 2,160 miles in 5.5 hours. What is the average speed of the vehicle to the nearest tenth. I got 55.5, but I don't think it is correct.
asked by Matthew 
Math
Tim wants to model a doll house from a real house that measures 60 feet in length by 28 feet in width. He decides to use a scale in which ¼ inch equals 1 foot. Based on this scale, What will be the length of the longer side of Tim's model? inches What
asked by Matthew 
ECONOMICS !!!!! Help me ***
An article in The Wall Street Journal reported that large hotel chains, such as Marriott, are tending to reduce the number of hotels that they franchise to outside owners and increase the number the chain owns and manages itself. Some chains are requiring
asked by BBBBBB 
Precalculus
f(x)=x^21 Graph the function. Estimate the intervals on which the function is increasing or decreasing, and estimate any relative maxima or minima.
asked by Lacresha 
percentage
100 employees leave a business that originally has 2000. What is the % of original employees did not leave? Is it 5%
asked by Anonymous 
Miles per Gallon
If i have a 12 gal gas tank and started with 3/4 tank of gas and drove 90 miles with the air on and was left with 1/4 tank of gas at the end. How many miles did i get per gallon?
asked by Anonymous 
Math
Tim wants to model a doll house from a real house that measures 60 feet in length by 28 feet in width. He decides to use a scale in which ¼ inch equals 1 foot. Based on this scale, What will be the length of the longer side of Tim's model? inches What
asked by Matthew 
Physics
Two thin and identical steel rods move with equal speeds v=1 m/s in opposite directions and collide longitudinally. The collision is perfectly elastic and the rods swap their velocities. How long does the collision last in seconds if the length of the rods
asked by Kay 
School
I need to answer questions about school,(the topic I chose) but I don't get how to list the school options into my answers. It says: For this assignment, research school options available to you. List the top 10 schools from these options based upon your
asked by Janess 
statistics
The Stop N’ Go convenience chain recently selected a random sample of 10 customers. The store monitored the number of times each customer made a purchase at the store over a twomonth period. The following data were collected:
asked by petrit 
Exercice
The Stop N’ Go convenience chain recently selected a random sample of 10 customers. The store monitored the number of times each customer made a purchase at the store over a twomonth period. The following data were collected: 10 19 17 19 12 20 20 15 16
asked by petrit 
statistics
According to Advertising Age, the average base salary for women working as copywriters is $66,000. Assume that the salaries are normally distributed and that the standard deviation is $7,500. a. What is the probability of a woman receiving a salary between
asked by petrit 
Math
Irf the temperature is 42 degrees at a.m and it goes up to 68 degrees at noon,how many degrees warmer is it?
asked by Shreeti 
Math check
Find the critical value for the hypothesis test, given the following. (Give your answer correct to two decimal places.) Ha: ó1 > ó2, with n1 = 8, n2 = 10, and á = 0.025 F = 2.24 I did it this way and it comes up wrong 10.025=0.975/2=.4875 looked up on
asked by Glenn D 
Math
If the temperature is 42 degrees at a.m and it goes up to 68 degrees at noon,how many degrees warmer is it?
asked by Shreeti 
Algebra
tn = (1)n(n) A. 1, 2, 3, 4 B. 1, 2, 3, 4 C. 1, ½, 2/3, ¾ D. 1, 2, 3, 4
asked by Dale 
chemistry
why we use phenolphthalein indicator in the determination of the strenght of NAOH by using standard oxalic acid why not the others indicator?
asked by sbr 
ECONOMICS !!!!! Help me ***
Fortune magazine reported that SkyWest, an independent regional airline, negotiated a financial arrangement with Delta and United to provide regional jet service for the two major airlines. For its part of the deal, SkyWest agreed to paint its jets the
asked by BBBBBB 
math
the class is 50 students 30 like chocolate, 25 like vanilla, and 18 like both, which like neither.
asked by lisa 
Government
The President can choose to get rid of democracy. True or False?
asked by Olivia 
Science
Many farmers harvest their crops in the fall and then let the leftover plant material stay on the ground over winter. How does this help prevent erosion?
asked by Pat 
FINANCE
you want to retire in 30 years. You intend to invest $200 per month into a mutual fund that you expect to return 12% per year (1% monthly). If you continue making these monthly investments for 30 years, what amount of money will you have at the end of the
asked by LILY 
math
Find the value of z that would be used to test the difference between the proportions, given the following. (Use G  H. Give your answer correct to two decimal places.) Sample n x G 386 327 H 414 321
asked by Glenn D 
Physics
An arrow of mass 1000kg was fired from rest with a velocity of 15m/secs for a period of 0.5secs.calculate the applied force.
asked by Olajumoke 
math check
Find the 95% confidence interval for the difference between two means based on this information about two samples. Assume independent samples from normal populations. (Use conservative degrees of freedom.) (Give your answers correct to two decimal places.)
asked by Glenn D 
Physics
William Tell fired an arrow with a velocity of 100 m/s at an angle of 30˚. How long will it take to reach its highest point? Please show work
asked by Lynn 
Chemistry
Do I solve this by multiplying 1.8645 by 1.14??The equation of your calibration curve from a spectrophotometry experiment was y = 1.8645x. Assuming your calibration curve is set up exactly like it was in lab (concentration in mM on the x axis and
asked by Ann 
Physics
A motor car of mass 30kg,moving with a velocity of 10m/s. by the application of brakes,it was brought to rest at a distance of 25meters. Find the average force.
asked by Olajumoke 
Please help how do I calculate this
Calculate the Calorimeter Constant (Ccal) if 25.00 g of water at 51.50°C was added to 25.00 g of water at 25.00 °C with a resulting temperature of 35.00 °C? (*remember the specific heat capacity of water (cwater) = 4.180 J/g°C)
asked by Mary 
math
any help appreciated on this one, none of us can get it right. Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (b) Determine the critical region and critical value that are used in the classical approach for
asked by Glenn D 
LeadershipCheck #2
Please check my new copy: I believe the essential qualities a leader must possess are to set a vision and to be able to lead. A leader must be able to set a vision to seek for improvement and change the mistakes. A leader must be able to set a vision for
asked by Celest 
Physics
A cannon ball whose barrel is angled at 40˚ from the horizontal fires a shell with a muzzle velocity of 350 m/s. What is the horizontal and vertical component of the muzzle velocity and what is the range of the shell?
asked by Lynn 
geometry
a boy stands 1 meter away from a lamppost. he is 1.8 meters tall and casts a shadow 2 meters long in the light from the lamp. how tall is the lamppost?
asked by savanna 
Math
Alec, Kate and Ketan are roommates who share living expenses in a ratio of k: 2a: 5k respectively. If their total expenses each month equal $1400, how much is Ketan's monthly contribution? (A) 280/2a+6k (B) 700/2a+6k (C) 1400k/2a+6k (D) 2800a/2a+6k (E)
asked by Catherine 
psychology
If you conclude that the participant's in a study are a representative sample, then you can from the research sample to the larger population. a. replicate b. speculate c.generalize d.sample e. none of the above
asked by Taylor B 
psychology
Ethical standards in human research allow researchers to balance interests in acquiring new information with concern about: a. public approval b. Dignity and human welfare c. Making money from experiments d. Applied science e. Getting academic recognition
asked by Taylor B 
statistics
the mean loss for customers at first state bank (which was not insured) was $150. The standard deviation of the losses was $125
asked by daphne 
Math help
Consider the following table and use the formulas that are given for computing the correlation coefficient. (Give your answer correct to two decimal places.) x 1 1 0 0 0 y 7 3 5 6 6 r = n xy − x y n x2 − x 2 n y2 − y 2 (1) r = SS(xy) SS(x) · SS(y)
asked by Glenn D 
Physics
A cannon ball whose barrel is angled at 40˚ from the horizontal fires a shell with a muzzle velocity of 350 m/s. What is the resultant velocity of the shell when it lands?
asked by Lynn 
algebra
x^215x+36=0
asked by Anonymous 
Chemistry correct calculation check
Calculate the Calorimeter Constant (Ccal) if 25.00 g of water at 51.50°C was added to 25.00 g of water at 25.00 °C with a resulting temperature of 35.00 °C? (*remember the specific heat capacity of water (cwater) = 4.180 J/g°C) Do I substrate
asked by Mary 
Psychology
Assume that an individual engages in behaviors that are in conflict with their stated religious beliefs, and they experience dissonance. What impact might this have on their beliefs? What might allow people to productively resolve that dissonance?
asked by Jay 
Math
limit as x approaches 9 of (8/(sqrt(x)3))  (48)(x9)
asked by Annie 
physics
a 17 kg sled is being pulled along the horizontal snow covered ground by a horizontal force of 22 N. starting from rest the sled attains a speed of 1.9 m/s in 7.8 m find the coefficient of kinetic fiction between the runners of the sled and the snow.
asked by Sarah 
astonomy
Assume that earth and mars are perfect spheres with the radii of 6,371km and 3,390 km, respectively. Calculate the surface area of earth. b)calculate surface area of mars
asked by anthony 
math
calculate the general antiderivative of f(x) = 19x^4  15x^3 + (20/x)
asked by Annie 
math
find the critical points of h(t) = (t^24)^(1/3)
asked by Annie 
LeadershipCheck #2
Please check: I believe the essential qualities a leader must possess are to set a vision and to be able to lead. A leader must be able to set a vision to seek for improvement. Seeking for improvement helps make the idea grow better and better. A leader
asked by Celest 
math
Solve: f(x)=7x^6=1
asked by Ryan 
statistics
The mean loss for customers at the first State bank (which is not insured) was $150.00 the standard deviation of the losses was $125.00
asked by daphne 
Calculus
Find the equation of the tangent line to the curve (piriform) y^2=x^3(4−x) at the point (2,16−−ã). a. Find dy/dx at x=2. dy/dx= b. Write the equation of the tangent line to the curve.
asked by Tyler 
physics
how to calculate the force exerted by by a man with a mass of 72 kg on the floor of a lift when the lift is accelerating downwards at 0.6 meters per second
asked by oliver 
CHEM
How many kilojoules are released when 85.0g methanol is burned?
asked by Kim 
Math
Compute the square footage of carpet needed to cover a room 10' 6" x 12' 3". Area (to the nearest tenth) = square feet. Can you explain the steps on how to solve this problem.
asked by Matthew 
Math
What is the range of values of the probability of an event?
asked by Maddie 
Calculus
Find the linear approximation L(x) of ln(x) at the point a = 12.
asked by Tyler 
Math
V = 4/3r3. A sphere has a radius of 4 inches. Volume (to the nearest tenth) = cubic inches The answer I got was 261.2 but it was wrong.
asked by sarah 
Math
You are paneling an office that has 2 walls measuring 18' x 8' and 2 walls measuring 9' x 8'. How many sheets of paneling will you need, assuming each panel sheet measures 4' x 8'?
asked by Matthew 
business math
tony towing borrows of $12,250 at 9.5% interest for 320 days if bank use exact interest method how much interest will the bank collect? Round to nearest cent
asked by angela 
Math
A cylinder has a radius of 2 feet and a height of 18 feet. Volume (to the nearest tenth) = a0 cubic feet i TRIED to work out this problem. The answer I got was 226.3 I used the cylinder volume formula which is π r2 h.! The computer says my answer is
asked by sarah 
math
A chocolate cookie recipe that makes 24 cookies uses 3/4 cups of brown sugar. If John wants to make 72 cookies, how much brown sugar does he need?
asked by davis 
Math
Assuming lambda=0.02 and t=50, compute P(2)
asked by Maddie 
Statistics
Find the value of z that would be used to test the difference between the proportions, given the following. (Use G  H. Give your answer correct to two decimal places.) Sample n x G 386 327 H 414 321
asked by Tracy 
statistics
Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (a) Determine the critical region and critical value that are used in the classical approach for testing the null hypothesis Ho: ì1 = ì2 = ì3 = ì4 = ì5, with
asked by Tracy 
Statistic check
Find the critical value for the hypothesis test, given the following. (Give your answer correct to two decimal places.) Ha: ó1 > ó2, with n1 = 8, n2 = 10, and á = 0.025 F = 2.24 I did it this way and it comes up wrong 10.025=0.975/2=.4875 looked up on
asked by Glenn D 
Statistics check
Complete the hypothesis test with alternative hypothesis ƒÊd ‚ 0 based on the paired data that follows and d = O  Y. Use ƒ¿ = 0.01. Assume normality. Oldest 188 174 192 196 65 Youngest 186 168 199 199 69 (a) Find t. (Give your answer correct to
asked by Tracy 10 
Chemistry
How many kilojoules are released when 85.0g methanol is burned?
asked by SugarBear 
Math
Grace is building a brick wall along her driveway. She estimates that one row of brinks plus mortar will be 2 3/8 inches high. How many rows will she need to construct a wall that is 57 inches high?
asked by Susie 
math
A market research company surveyed 2500 teenage cell phone owners. The company learned that 4/5 of them use cell phone data services. How many teenagers surveyed use cell phone data services?
asked by john 
Chemistry
Give three substances with different structures and different chemical composition and explain why they are different from each other. If possible, give the chemical composition or formula of the substances. Thanks.
asked by Perrie 
Math
If P(F)=0.3, P(E or F) =.65 and P(E and F)=.15, find P(E)
asked by Amanda 
Economics
Personal consumption expenditures $245 Net foreign factor income 4 Transfer payments 12 Rents 14 Statistical discrepancy 8 Consumption of fixed capital (depreciation) 27 Social Security contributions 20 Interest 13 Proprietors’ income 33 Net Exports 11
asked by Anonymous 
physics
Suppose the Earth's orbit is divided in two by its minor axis as shown in the figure. How much longer in days does the Earth spend in one half than the other? The eccentricity of an elliptical orbit is defined as e:=a/c where c is the semimajor axis and a
asked by Kay 
college physics
an atwood machine is constructed by mounting a welllubricated pulley (not necessarily a ring/disc), whose radius is 6.00cm on an axle and passing a rope over the pulley. Each end of the rope is attached to a different mass of 3.0 kg and 2.0kg so they both
asked by kim 
Chemistry answer check
What quantity of heat is required to produce 5 mol of oxygen gas by this reaction? HgO(s) → Hg(l) + ½ O2(g), ΔH = +90.7kJ I calculated 90.7*5, but my online homework says its wrong how do I calcuate this?
asked by Mary 
Economics
Compensation of employees $194.2 US exports of goods and services 17.8 Consumption of fixed capital (depreciation) 11.8 Government purchases 59.4 Taxes on production and imports 14.4 Gross private domestic investment 63.9 Transfer payments 13.9 US imports
asked by Anonymous 
physics
A woman stands on a scale in a moving elevator. Her mass is 68.0 kg, and the combined mass of the elevator and scale is an additional 713 kg. Starting from rest, the elevator accelerates upward. During the acceleration, the hoisting cable applies a force
asked by will 
Physics
If a 60.0 kg person slides down an incline angled 25˚ below the horizontal and friction IS present with a coefficient of kinetic friction equal to k = 0.450. What is the person's acceleration as they slide down the slide.
asked by Renee 
financial management
On a Statement of Revenue and expense I have one year plus the percentage of change and I need to find the projected budget for next year Where can I find how to to do this problems
asked by Mary 
anthropology
Throughout the 19th century, stereotyping of work by sex had restricted women's employment. (Woloch, 2002). Is this a quote or paraphrasing?
asked by vanessa 
math
Let A=(0,0), B=(2,4), C=(17,4) and D=(15,0). Then ABCD is a parallelogram. A line through the point (0,−1) divides the parallelogram into two regions of equal area. The slope of this line can be written as a/b where a and b are positive coprime integers.
asked by anonymous 
Math question
How do you find the pvalue, on a problem like below. The corrosive effects of various soils on coated and uncoated steel pipe was tested by using a dependent sampling plan. The data collected are summarized below, where d is the amount of corrosion on the
asked by Tracy