Questions Asked on
July 21, 2011

chemistry
For Ethanol, change in H vapor = 38.7 kj/mol at 78 degrees Celsius, it's boiling point. Calculate change in S for the vaporization of 1.00 mol ethanol at 78 degrees celsius and 1.00 atm pressure
asked by miranda 
physics
A clock has its second hand 2 cm long. What will the average velocity of the tip of the second hand in 15 seconds.
asked by Sonu 
CALCULUS HELP !
f(x)=(3x^3x^29x8)/(6x^2+4x+3. Find the equation of the nonvertical asymptote. y= Does f(x) intersect its nonvertical asymptote ? What is the smallest value of x at which f(c) intersects its nonvertical asymptote ? please show all the work. I did
asked by tony 
chemistry
is the melting point determination of crude benzoic acid recyustalization is higher or lower?
asked by rosema 
com 155
Review the passage below, which contains 20 errors. Identify these errors by marking each of the errors in bold, and make your correction in parentheses after the error. Example: My cars interior is black. This must be marked as follows: My cars (car’s)
asked by natasha 
statistic
solve the problem :score a test are normally distributed with a mean of 68.2 and a standard deviation of 10.4 estimate the probablility that among 75 randomly selected students, at least 20 of them score greater than 78
asked by martha 
physics
A 0.10 g plastic bead is charged by the addition of 1.0 x 1010 excess electrons. What electric field (strength and direction) will cause the bead to hang suspended in the air?
asked by Jessika 
physics
The energy needed to raise a load of mass 10 kg is 100 J. The height of the load at the end of the process is
asked by Anonymous 
statistics
If one card is randomly picked from a standard deck of 52 cards, the probability that the card will be a number from 2 through 10, or a Heart, or both, is: a. 51.9% (27/52) b. 69.2% (36/52) c. 76.9% (40/52) d. 94.2% (49.52)
asked by Jackay 70 
statistics
Thirty percent of the students in a high school face a disciplinary action of some kind before they graduate. Of those students, 40% go on to college. Of the 70% who do not face a disciplinary action, 60% go on to college. What percent of the students from
asked by hello 
physics
You are given a vector in the xy plane that has a magnitude of 94.0 units and a y component of 44.0 units. A. What are the two possibilities for its component? For this part I got x = 83.1 and 83.1 B. Assuming the x component is known to be positive,
asked by victor 
Physics
An ant walks on a piece of graph paper straight along the x axis a distance of 10.0 cm in 2.00 s. It then turns left 30.0 degrees and walks in a straight line another 10.0 cm in 1.90 s. Finally, it turns another 70.0 degrees to the left and walks another
asked by Kyle 
physics
A skier is accelerating down a 30.0 degrees hill at 1.80m/s^2. How long will it take her to reach the bottom of the hill, assuming she starts from rest and accelerates uniformly, if the elevation change is 375 m? Apparently the answer isn't 20.4 s... Can
asked by Mika 
MATLAB
I got another MATLAB question that I seem to be struggling with. Use two separate input statements to prompt a user to enter his or her first and last names. Use the disp function to display those names on one line. (You'll need to combine the names and
asked by Lee 
HRM
what is different between staffing and HRM?
asked by daya 
math
find the eqt. of the tangent to the curves at (1,2). y^3+y^3=9(xy1) [ans: y=5x5] could some1 show me the calculation work bcus my ans is y=(6x+4)/5.
asked by lily 
Math
One thousand raffle tickets are sold for $4.00 each. One grand prize of $800 and two consolation prizes of $100 each will be awarded. Jeremy purchases one ticket. Find his expected value.
asked by Jen 
algebra
find the product. (x+3)(x^23x+9)
asked by sheba 
algebra
find the product. (4x+4y)^2
asked by sheba 
Math
For Reiny:What step did I do wrong.(Help) (x4x^3)^2 =(x4x^3)(x4x^3)=(x)(x)+(x)(4x^3)+(4x^3)(x)+(4x^3)(4x^3) = x^24x^44x^416x^6 =x^28x^416x^6
asked by Ms.Ellis 
coms 285
What are the three most important points a group must keep in mind when working collaboratively on a writing project? Why? Support your response with references to the readings and personal experiences.
asked by marcellus dobson 
Math
A person spins the pointer and is awarded the amount indicated by the pointer. (A circle with 3 sections divided: $2, $5, $10). The pointer stops on $2. It costs $6 to play the game. Determine: a.) The expectation of a person who plays the game. b.) The
asked by Jen 
algebra
Given the function f(x) = 3x + 16, evaluate f(19)
asked by abdi adam 
CHEMISTRY
Discuss in detail the healthcare applications of chemical reactions. Which chemical reactions would you consider to be of importance to healthcare professionals? Why? In which situations are these chemical reactions useful to healthcare professionals?
asked by anne 
geometry
can 19cm,9cm,11cm construct a triangle
asked by arw 
marketing
Identify one way in which the role of the agency and the product or service it regulates or oversees affects consumer choice in the health care marketplace. Identify health care costs for consumers. Identify factors that contribute to the consumer’s
asked by Anonymous 
statistics
The average score on a standardized test is 500 points with a standard deviation of 50 points. What is the probability that a student scores between 450 and 600 on the standardized test?
asked by tom 
statistic
The average score on a standardized test is 750 points with a standard deviation of 50 points. If 2,000 students take the test at a local school, how many students do you expect to score between 700 and 800 points?
asked by tom 
physics
What is the dimension of current
asked by Anonymous 
geometry
based on the data in your table and the scatterplot write and equation for the width of the rectangle in the terms of the legth
asked by juan garcia 
marketing
Identify one way in which the role of the agency and the product or service it regulates or oversees affects consumer choice in the health care marketplace. Identify health care costs for consumers. Identify factors that contribute to the consumer’s
asked by Anonymous 
math
For the transformation T, what is T1? T : (x, y) (x + 4, y + 3) T1: (x, y)
asked by robbie 
math
A reflection maps the point (2, 3) to the point (2, 3). It is a reflection over the
asked by robbie 
geometry
Given that triangles KON and LOM are similar, find the scale factor
asked by Lydia 
calculus
4. a. Estimate the area under the graph of f(x)=sqrt(x^2+4) from x=0 to x=2 using four rectangles and right endpoints.
asked by Rick 
Chemistry
A 55 yr old woman goes to lunch and has a bacon, cheese pizza and 3 large sodas. She is on her way home and gets heartburn, abdominal pain, and difficulty breathing. She drinks lots of water and consumes milk of magnesia to feel better.What should the
asked by Anonymous 
Chemistry
At 25 degrees celsius,one cm3 of iron mass of 7.62 grams. What volume of iron is occupied by 125 grams of iron
asked by Pearl 
English
Please check my work: Proofread the passage looking for grammar, puntuation, and spelling errors. Most students do not like english class. They think think its a waste of there time and energy. An't nobody likes to right papers and take tests anyway? Me
asked by Priya 
chemistry
suppose 5.00g of sodium carbonate reacts completely with excess of hydrochloric acid. Show how to calculate the mass (g) of sodium chloride that would be formed. Na2CO3 + 2HCl = 2NaCl + CO2 + H2O What is the limiting reagent?
asked by stephanie 
physics
Is the mass of an object has an effect velocity with it land on the ground when freely falling from rest?
asked by Agnes 
English 12
Many critics see Robert Browning as a "psychological poet," who is more modern than other Victorian writers.In what sense is "My Last Duchess" an exploration of abnormal psychology and human evil? How does Browning convincingly portray the complexity of
asked by mystchic 
Physics
An ant walks on a piece of graph paper straight along the x axis a distance of 10.0 cm in 2.00 s. It then turns left 30.0 degrees and walks in a straight line another 10.0 cm in 1.90 s. Finally, it turns another 70.0 degrees to the left and walks another
asked by Kyle 
maths trigonometry
sin (60 degrees + theta)cos(30 degrees  theta)is equal to (A)2 cos theta (B)2 sin theta (C)theta (D)1 could u plz explain this answer thank you
asked by chinnu 
maths  statistics
find the mode of the fdllowing data class  020 2040 4060 6080 frequency 15 6 18 10 plz explain this sum thank you
asked by chinnu 
English
In the following paragraph where are the linking verbs? And is the punctuation correct? My Chinese pug, Pooh, is a whole lot of dog in a very compact package. Even though she is only twelve inches tall and weighs just over 18 pounds, she seems to have the
asked by Anonymous 
Math
Help Please: Please Help 1.Essay:Show all work,Find the Product. (x^22)(x^34x+9) 2.Find the product:(2x4y)(2x+4y) 4.Find the product:(8x3y)^2 a.64x^2+9y^2 b.64x^29y^2 c.64x^248xy+9y^2 d.64x^248xy9y^2 (b)
asked by Ms.Ellis 
maths trigonometry
if sin A + sin^2 A = 1, then the value of cos^A + cos^4 A is (A) 2 (B) 1 (C) 2 (D) 0
asked by chinnu 
math
Given a dilation with the origin O (0, 0), by observation determine the scale factor "K." DO, K = (5, 0) (10, 0) The dilation an expansion. true or false
asked by robbie 
math
If P(2, 1) is rotated 90°, its image is
asked by robbie 
college algebra
4x^2y(4x^3y^5)
asked by melba 
Calculus
3 numbers x y and z are to bea randomly chosen between 0 and 1. A What is the probability that X + y + z will be less than 1? B What is the probability that both x+ y
asked by jane 
Computers Excel 2007
Performing what if analysis
asked by Betty 
English
Can you please check these sentences on phrasal verbs, please? Thank you very much in advance. (I don't know if their use is correct). 1) The plane will lift off at 9.00 o'clock. 2) They will head off at six a.m. tomorrow. 3) He cleared off without saying
asked by Henry2 
Statistics(Please help)
the problem asks to complete an ANOVA table and report the relevant SS, df, MS, and F values, and find the critical value for the Fvalues. I found my F values: they were 3 and 16. I do not understand how to find the critical value.
asked by Hannah 
geometry
One equilateral triangle has sides 5 ft long. Another equilateral triangle has sides 7 ft long. Find the ratio of the areas of the triangles
asked by Lydia 
Criminal law
During a trial, both the prosecutor and the defense attorney may __________ to questions asked by the other party. (Points: 5) request a judgment object ask for a recess tell the person not to respond I think its B
asked by Bobby 
math
how to find the slope of the curve 17x^2+12xy=1008y^2 at the point where y=1. i already d/dx but i didn't know how to find the slope of curve bcus they only give y. d/dx=(34x12y)/(12x+16y)
asked by lily 
criminal law
The __________ Amendment gives a defendant the right to remain silent. (Points: 5) Sixth Fourth Fifth Third it think its "Fifth"
asked by Bobby 
Physics
Why is there a centripetal acceleration if the velocity does not increase? a. Velocity changes direction as you move around the circle, causing a Δv b. Velocity in a circle is always constant c. Because gravity will hold any object in a circular motion I
asked by Tina 
algebra
Essay. Show all work. Find the quotient y^4+3y1  y^23
asked by shay 
algebra
Essay. Show all work. Find the quotient. 49a^2b^2  7ab
asked by shay 
algebra
Short answer. Find the quotient: 6x^3x^27x9  2x+3
asked by shay 
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
asked by Brit 
chem
density of 20% by mass C2H6O2 solution in water is 1.03 g/mL. find the molarity of the solution.
asked by lily 
chemistry
What volume of 14 N H2SO4 is needed to make 250 ml of 3.2 N H2SO4 solution?
asked by Michelle 
Math
A person spins the pointer and is awarded the amount indicated by the pointer. (A circle with 3 sections divided: $2, $5, $10). The pointer stops on $2. It costs $6 to play the game. Determine: a.) The expectation of a person who plays the game. b.) The
asked by Jen 
chemistry
Lakes that have been acidified by acid rain can be neutralized by the addition of limestone How much limestone in kilograms would be required to completely neutralize a lake containing of H2 per liter? 5.0 * 103 g SO4 5.2 *
asked by Anonymous 
CALCULUS!
f(x)=(6x^3–9x^2–3x–1)/(4x^2+7x–3) . Find the equation of the nonvertical asymptote. y = ____3x/2  39/8_____ Does f(x) intersect its nonvertical asymptote? (yes or no) ___YES____ What is the smallest value of x at which f(x) intersects its
asked by Brit 
geometry
ABCD is a parallelogram. Angle B is equal toand angle D is equal toFind x
asked by Anonymous 
early childhood literacy
considering storybooks withelectronic features educators believe that
asked by torrey 
math algebra
find the following product 7z (3z^3  2z+ 4)
asked by Dayana 
chemistry
How much CuSO45H2O is needed to make up 500 ml of 2.5 M CuSO4
asked by ? 
stats (please help)
Assume that the population of heights of male college students is approximately normally distributed with mean of 69 inches and standard deviation of 3.75 inches. Show all work. (A) Find the proportion of male college students whose height is
asked by Celest 
Math for pharmacy Tech
My daughter Kim teaches and notes that the average student uses 75 sheets of paper every week. A) How many sheets will a student use in a 42week school year? B) How many sheets will a class of 26 students use in a week? Not sure how to approach the
asked by Rina 
math
man drives for a time at 20 mph. then for a time at 45 mph.he drives 25 mi. he drives 50 min. . how many miles did he drive 20 mph ?
asked by mac 
Geology
How did the Hawaiian Islands form geologically? How could the relative age of the islands be determined? (In other words, how would you know which island was oldest, which was youngest, etc.)?
asked by Henry 
Psychology
What is the impact of bias on individuals?
asked by Linda 
math
Ed buys a car on credit . He makes a down payment of $1,500 and pays $250 per month for 36 months. What is the finance charge if the cash price on the car is $9,500
asked by Anonymous 
Chem 2
The halflife for the radioactive decay of U238 is 4.5 billion years and is independent of initial concentration. a) How long will it take for 10% of the U238 atoms in a sample of U 238 to decay? b)If a sample of U238 initially contained 1.9×1018
asked by Kristina 
math
A gardener wants to create a rectangular garden with length of 8x  4y ft. and width of 5x + 9y ft. What is an algebraic expression for the area of the garden?
asked by Dayana 
human resources
Need some help developing a 5 year career plan to be an HR Cooridnator. I am a Data manager for the last 8 yrs. In school now for my BS in Business Management will finish in January 2012. Start Master in July of 2012. A mother of 2. See below for the
asked by Tee 
statistics
The following information is available. H0: μ ≤ 10 H1: μ> 10 The sample mean is 12 for a sample of 36. The population standard deviation is 3. Use the .02 significance level.
asked by Anonymous 
Geometry
M is the midpoint of segment AN, A has coordinates (6,2) and M has coordinates (1, 3). What are the coordinates of N?
asked by Lydia 
Geometry
Can a triangle have sides with lengths 7, 13, and 9?
asked by Lydia 
Spanish
What are common Spanish street suffixes (like Street = Calle)?
asked by Max 
Chemistry
Sodium carbonate reacts with hydrochloric acid as shown in an unbalanced chemical equation. What mass of Co2 is produced from the reaction of 2.94g Na2 Co2 with excess HCI? Na2CO3(s)+HCI(aq)+ CO2(g)+H2O A. 1.22 g B. 2.44 g C 2.94 g D 5.88 g E 7.08 g
asked by Taru 
Chem 104
The reaction of 2.30g N2 with excess H2 produces 2.00g NH3. The percent yield of this reaaction is?
asked by Zoria 
Geometry
Tell if the measures 9,11, and 7 can be side lengths of a triangle. if so, classify the triangle as acute, right, or obtuse?
asked by Lydia 
Geometry
the lengths of 2 sides of a triangle are 2 inches and 10 inches. find the range of possible lengths for the third side, s.
asked by Lydia 
Strayer University
a dogfood company makes a special kind of dog food. It consists of 10% meat powder and 90% grain. The meat powder cost 80 cents per pound. The grain costs 70 cents per pound. What is the cost of the new materials per pound of dog food?
asked by Cheryl 
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
asked by Josh 
chem
an aq. solution(NaCl) made by using 133g diluted to a total solution volume of 1 L.Calculate the molarity, molality & mass % of the solution(density of solution = 1.08g/mL) [ans: M=1.92M, m=2.0m, 10.4 %] i need the calculation work bcus my ans is
asked by lily 
chem
a hard H20 contains 0.0085% Ca by mass(form Ca+ ions).How much H2O(g) contains 1.2g of Ca?
asked by susan 
math
how to find the slope of the curve 17x^2+12xy=1008y^2 at the point where y=1. i already d/dx but i didn't know how to find the slope of curve bcus they only give y. d/dx=(34x12y)/(12x+16y)
asked by susan 
geometry
this one is killing me for some reason: Find any of the values of k so that (3, 4), (8,5), and (5, k) are the verticles of a right traingle.
asked by Lydia