Questions Asked on
March 15, 2011

ap chem
The heat of combustion of propane is 2,220.1 kJ/mol calculate the heat of formation, delta Hf, of propane given that delta Hf of H20= 285.3 kJ/mol and delta Hf of CO2 = 393.5 kJ/mol
asked by Anonymous 
Physics
A small plane tows a glider at constant speed and altitude. If the plane does 2.00X10^5 J of work to tow the glider 165 m and the tension in the tow rope is 2660 N, what is the angle between the tow rope and the horizontal?
asked by Alan 
Calculus
A hotair balloon is 180 ft above the ground when a motorcycle passes directly beneath it (travelling in a straight line on a horizontal road) going at a constant speed of 60 ft/s. If the balloon is rising vertically at a rate of 15 ft/s, what is the rate
asked by Jake 
math
A British company is sending you measurements for a table to build in your factory. The table top must be 50 cm × 75 cm. Your machine calibrates in inches. Find the size of the table in inches. (1 cm = .39 in)
asked by tish 
physics
A 55kg packing crate is pulled with constant speed across a rough floor with a rope that is at an angle of 44.7 degrees above the horizontal. If the tension in the rope is 155 N, how much work is done on the crate to move it 9.0 m? *looking for W=__J
asked by Alan 
Early childhood
Schoolage children generally develop writing skills in which sequence? A.Expressive writing,expository writing,story B.Exposity writing,story writing,expressive writing. C.Expressive writing,story writing,expository. Story writing,expository
asked by kim 
Math
A football field, including the end zones, is 360 feet long and 160 feet wide. How many square yards of artificial grass would be needed to cover the entire field?
asked by Anonymous 
history
All of the following statements are true about the Works Progress Administration EXCEPT: A.despite its good intentions, it provided few jobs for Americans B.the organization developed work projects for artists, musicians, and writers. C.it laid much of the
asked by sharice 
Physics
Early one October, you go to a pumpkin patch to select your Halloween pumpkin. You lift the 2.8 kg pumpkin to a height of 1.4 m, then carry it 50.0 m (on level ground) to the checkout stand. Calculate the work you do on the pumpkin as you lift it from the
asked by Alan 
physics
In a long jump, an athlete leaves the ground with an initial angular momentum that tends to rotate his body forward, threatening to ruin his landing. To counter this tendency, he rotates his outstretched arms to "take up" the angular momentum. In 0.393 s,
asked by jr 
Calculus
Find dy/dx in terms of x and y if (x−a)^9+y^9=a^9. Assume that a is a constant
asked by Cesar 
Physics
1. It takes 190 kJ of work to accelerate a car from 21.0 m/s to 29.0 m/s. What is the car's mass? 2. A 32kg girl is bouncing on a trampoline. During a certain interval after she leaves the surface of the trampoline, her kinetic energy decreases to 205 J
asked by Leo 
Algebra
When solving a system of equations by the addition method, how do you know when the system has no solution?
asked by Amy L 
math
Find the area of the region bounded by the graphs x=sqrt 2sin2y ; x=0
asked by sedat 
hemistry
sodium is manufactured commercially by electrolysis of molten sodium chloride. explain why it is not possible to use sodium chloride solution for this.
asked by Anonymous 
trig
Bob throws a ball straight up with an initial speed of 50 feet per second from a height of 6 feet. (a) Find parametric equations that describe the motion of the ball as a function of time. (Do this on paper. Your instructor may ask you to turn in this
asked by Anonymous 
Chemistry
Write a balanced chemical equation (molecular equation). Write a total ionic equation. write a net ionic equation. (NH4)2 SO4(aq)+Na2CO3(aq) >
asked by Jake 
Calculus Please Help
Let y(x)=ln(cosh(x)+ sqrt(cosh^2(x)−1)) Find the derivative Dxy= I don't know what to do with this...
asked by Patrick 
Physics
In a skating stunt known as "crackthewhip," a number of skaters hold hands and form a straight line. They try to skate so that the line rotates about the skater at one end, who acts as the pivot. The skater farthest out has a mass of 73.0 kg and is 7.70
asked by Kara 
Physics please help!!
A 73.5 kg person sits on a 3.20 kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.74 cm in diameter. Calculate the pressure exerted on the floor by each leg of the chair, assuming the weight is evenly distributed.
asked by Megan 
English
My 1st grade son needs to write a paragraph but is having a very hard time grasping the concept. How can I help him with this? He doesn't under stand that the paragraph has to blend/flow and be about the same topic all the way through. What shoudl I do?
asked by Jennifer 
MATH
Please check my answers: How are the symbols 3/4, 0.75, and 75% related? They are all different ways to express the same number. 2.(4pts) Use inductive reasoning to predict the next number in the sequence. 1, 2, 2, 4, 4, 8, . . .8 because each number after
asked by Anonymous 
physics
calculate the period and frequency of a 3.500 m long pendulum at the following locations: a) the north pole, where acceleration due to gravity is 9.832 m/s^2 b) chicago, where acceleration due to gravity is 9.803 m/s^2 c) jakarta, indonesia, where
asked by giselle 
World History
007679 1. A staple food transplanted from Southeast Asia to the Mediterranean world as a result of the Islamic Empire was A. wheat. B. rice. C. yams. D. potatoes. 2. How did Alfred the Great secure his modern reputation as a statebuilder? A. He gave free
asked by Atty 
calculus
find the nth derivative of 2/(x+1)
asked by amy 
Chemistry
When sodium forms an ion, will it form a cation or anion?
asked by Donnie 
chemistry ASAP please!!
The reaction of CO(g) + NO(g) is secondorder in NO2 and zeroorder in CO at temperatures less than 500K. (a) Write the rate law for the reaction. (b) How will the reaction rate change if the NO2 concentration is halved? (c) How will the reaction rate
asked by Maria 
Environmental engineering
If the BOD5 of a waste is 220 mg/L and the ultimate BOD is 320 mg/L, what is the rate constant?
asked by Massiel 
Chemistry
SO3 + H2O = H2SO4 If you react 34 g of water and have excess SO3, how much H2SO4 would you theoretically produce
asked by Chrissy 
Physics
Can someone please help me? The brakes of a truck cause it to slow down by applying a retarding force of 2.60 103 N to the truck over a distance of 930 m. What is the magnitude of the work done by this force on the truck? Is the work positive or negative?
asked by Phil 
chemistry
sodium is manufactured commercially by electrolysis of molten sodium chloride. explain why it is not possible to use sodium chloride solution for this.
asked by Anonymous 
Hotair balloon
A hotair balloon is 180 ft above the ground when a motorcycle passes directly beneath it (travelling in a straight line on a horizontal road) going at a constant speed of 60 ft/s. If the balloon is rising vertically at a rate of 15 ft/s, what is the rate
asked by Jake 
chem
20 ml of 0.1 M Acetic acid and 25 ml of 0.1 M Sodium Acetate are mixed together. then 5ml of 0.1 M of NaOH is added. Find the Ph before the addition of NaOH and after the addition of NaOH??
asked by james bond 
chemistry
How many atoms are contained in 8.8 g of CO2?
asked by jenny 
Chemistry
A sample of O2(g) is saturated with water vapor at 27 C. The total pressure of the mixture is 772 torr, and the vapor pressure of water is 26.7 torr at 27 C. What is the partial pressure of the O2?
asked by naseeb 
chemistry
20 ml of 0.1 M Acetic acid and 25 ml of 0.1 M Sodium Acetate are mixed together. then 5ml of 0.1 M of NaOH is added. Find the Ph before the addition of NaOH and after the addition of NaOH??
asked by james bond 
Physics
A child is sliding on a sled at 1.8 to the right. You stop the sled by pushing on it for 0.70 in a direction opposite to its motion.If the mass of the child and sled is 36 , what average force do you need to apply to stop the sled?
asked by Kobe Bryant 
Statistics
I'm stumped on this question. A teacher informs her history class that a test is very difficult, but the grades would be curved. Scores for the test are normally distributed with a mean of 25 and a standard deviation of 5. If the grades are curved
asked by Norilyn 
Calculus
Find the slope of the tangent to the curve y^2=x^3/(xy+6) at (6,3)
asked by Ana 
english
give examples of literary and literay prose by citing examples from any source of your choice 350 words (you may quote the source)
asked by sunita 
physics
Your sonic range finder measures the distance to a nearby building at 20m. The range finder is calibrated for sound traveling 343 m/s, but on this very cold day the speed of sound is only 309 m/s. How far away is the building?
asked by Harry 
Sound and music
If the fundamental frequency for a 60cm long guitar string is 500 Hz, what is the speed of the traveling waves?
asked by Harry 
Math
Solving Identities [(1+tanx)/(sinx)] secx I got cscx please halp me to solve it to see if its right
asked by lowy 
math !!!! :O
How many degrees are in the angle between the hands of a clock at 8:00?
asked by Katherine 
chemistry
A 0.040M solution of a weak acid has a pH of 3.02 at 25°C . What is the value of Ka for the acid?
asked by darren 
math
for a set of three elements find the number of different subsets of 2 elements.use row 3 of pascals triangle
asked by jasmine 
English
Blast 3 points from a team. (At a game, what does that sentence mean? Would you paraphrase the sentence? What does 'blast' mean here?)
asked by rfvv 
Spanish
49. Mi madre hace ____ con tortillas, carne de res, queso y tomates. a. el guacamole b. las quesadillas c. los tacos d. el flan sabroso C? 51. No tengo tiempo para arreglar mi cuarto. Voy a poner la ropa ________ de la cama. Nadie puede verla. a. encima b.
asked by mysterychicken 
Physical Science
If a vehicle circled Earth at a distance equal to the EarthMoon distance, how long would it take to make a complete orbit?
asked by Indiana 
physics
a .1kg particle with velocity of 5m/s comes in to contact with a solid cylinder at rest of mass 1kg and radius .2meters. what is the final angular velocity
asked by stephen 
Geometry
A kite has diagonals of 16 inches and 23 inches as seen below. What is the perimeter of the kite?
asked by Devon 
english
Write a 150–200 word paragraph about the most helpful information you have learned from your other secondblock course on how to make sound financial decisions. Underline your topic sentence and bold your clincher sentence.
asked by Shay 
Math
A circular swimming pool is 4 feet deep and has a diameter of 15 feet. If it takes 7.5 gallons of water to fill one cubic foot, to the nearest whole number, how many gallons are needed to fill this swimming pool. Diameter = 2r A = π r^2 V = 4A W = 7.5V
asked by Anonymous 
Math
A picnic cooler is shaped like a rectangular prism. The dimensions inside are 36 inches by 12 inches by 15 inches. In cubic feet, what is the capacity of the cooler?
asked by Anonymous 
Math
The inside edge of a racing track is shaped like a circle with a diameter of 420 feet. About how many times would a runner have to go around the track to run one mile?
asked by Anonymous 
Math
A developer buys a tract of land 0.5 mile long and 0.25 mile wide. Is this enough land to lay out a 75acre golf course if there are 43,560 square feet in one acre?
asked by Anonymous 
math
Find the volume of a cap of a sphere with radius r=86 and height h=48.
asked by John 
Thank you!
BOB pursley
asked by Portia 
algebra
did I solve the problem correctly? c=$200+$50h c=$300+$25h is the answer c=$250 c=$325 Do all I have to do to this equation is to add them to get the total cost of labor with h=labor per hour and c=cost or do I have to solve it in a different way. I'm
asked by Sylvia 
ALGEBRA
Part III: Mathematics of Finance You have just graduated from college and landed your first big job. You have always dreamed of being a homeowner, and after carefully shopping for your dream home, you find one that you would like to purchase at a cost of
asked by tammy lo 
Business
You are the chief executive officer of Money Games Inc.(MGI), which has begun to market Borrow & Spend, a video game set in the world of finance. To buy ads, MGI borrows $50,000 from First Savings Bank. On MGI's behalf, you sign a note for the loan and
asked by Liz Marie Santana 
physics
A mass of 2kg was thrown straight up with a speed of 15m/s. (a) find the initial KE (b) how high does the mass rise? (c) what is the GPE of the mass at the highest point?
asked by Madi 
math
what is a cross product please respond ASAP!!
asked by Anonymous 
physics
From a tree that is 15m tall, a fruit of mass 2kg falls to the ground. (a) find the initial GPE (b) find the speed at impact (c) find the KE at impact (d) how much energy was lost to heat and sound after the mass came to rest?
asked by Madi 
physics
A mass was dropped from a height of 20m. (a) find its speed at impact. (b) what can you say about the initial GPE of the mass and the KE of the mass just as it hits the ground?
asked by Madi 
Chemistry
What mass of silver chloride can be prepared by the reaction of 160.0 mL of 0.10 M silver nitrate with 120.0 mL of 0.19 M calcium chloride?
asked by Rachel 
mathematical
Having mathematical standards in grades K12 will give students clear and realistic expectations of what they are expected to learn in mathematics. The following solution explains this importance for students as well as the impact standards have on what
asked by Anonymous 
chemistry
You add thiocynanate ions to a solution The molarity of silver ion is 0.1M initially. Calculate the max concentration of SCN ion that exists in the solution before AgSCN beings to precipitate? ?
asked by emily 
engineering mathematic
give that z = f(x,y). use partial derivatives to find δz/δx and δz/δy for xe^xz + z(xy+1)^3sin x cos^2y=xy/z present your final answer in the simplest form.. please solve this problem....tq
asked by waklu 
Science
a scooter goes from a velocity of 6.9 m/s to a velocity of 4.8 m/s in a time of 5.1 seconds. what is the acceleration of the scooter
asked by nick 
Chemistry
Which indicator can be used to detect the endpoint of a species that has Ka=1.1 x 10E8? I used phenolphtalein? is that correct?
asked by Mike 
Spanish
57. Sé poco de estos platos españoles en el menu. Voy a pedir _____. a. la especialidad de la casa b. el plato principal c. a la carta d. por la carne de res A? C? Not sure.. 58. Ese camarero siempre me sirve _______. a. una vez b. en seguida c. muchas
asked by mysterychicken 
mathematical
What are some suggestions teachers can give to parents so that they might assist their children with unfamiliar math concepts?
asked by Anonymous 
Math
If the diameter of a wheel is 10 inches. What is the radius and how would I find its circumference. Thanks I do understand that the radius is twice the circumference.
asked by Americal 
MathStatistics
I have a couple of questions that need reviewI've answered them, but I'm not sure if I'm correct. 1.)Suppose you interview 10 randomly selected workers and ask how many miles they commute to work. You'll compute the sample mean commute distance. Now
asked by Anonymous 
MATH
183(2*2)WHAT IS THE ANWSER
asked by lidia 
MathStatistics
Two questions that I'm unsure of are below: 1). The variability of a statistic is described by: a) the spread of its sampling distribution. b) the amount of bias present c) the vagueness in the wording of the question used to collect the sample data d) the
asked by Anonymous 
math
how do you write out visual patterns
asked by Brandi 
computer science
How many products are in the windows xp family?
asked by john 
algebra 2
It takes 2 hr for 8 cooks to prepare the food for a wedding rehearsonal. How long would it take 5 cooks? Thank you
asked by esther 
English
Hello! Can you write the word Goodbye like this and like this Good bye? What about Goodnight or Good night?
asked by Mark 
chemistry
Azomethane, CH3NNCH3, is not a stable compound, and once generated, it decomposes. The rate of decomposition was measured by monitoring the partial pressure of azomethane, in torr. Time (min) 0, 15, 30, 48, 75 Pressure(torr)36.2, 30, 24.9,19.3, 13.1
asked by Jazmin 
physics
A 1.1 kg block is held against a spring of force constant 2.0×10^4 N/m, compressing it a distance of 0.20 m. How fast is the block moving after it is released and the spring pushes it away? v=____m/s
asked by Alan 
Spanish
40. A Luisa y a Mario _________ las películas de ciencia ficción. a. les fascinaron b. me fascinan c. te fascinaron d. nos fascina A or D? Not sure.. 41. Tenemos sueño. ____ aburre ese programa de detectives. a. Les b. Me c. Nos d. Le Not sure. 42.
asked by mysterychicken 
calculus
find the nth derivative of 2/(x+1)
asked by amy 
Comm 155
Could you please check these sentences and tell me if they make sense. Write five sentences in which you address changes in your writing. 1. With practice, I have gotten better at grammar and punctuation. 2. Working with a study group has made my sentence
asked by Debbie 
Algebra
12(74y  (6+5Y  8Z) = Please show work
asked by Todd 
chemistry
What reagent converts sodiumethanoate to methane?
asked by Anonymous 
chemistry
What reagent converts sodiumethanoate to methane?
asked by Dan 
College Algebra
You have 100yds. of fencing to enclose a rectangular area. Find the dimensions which maximize the area. What is the maximum area? I know that A=L times W. I know that 100 = 2L+2w Subtract 2L from both sides: 1002L=2W Divide by two: 50L=W Substitute in
asked by Brooklyn 
Math
Helen stands 66 m away from the base of the tree. If the line of sight makes an angle of 30 with the top of the tree with respect to the horizon. What is the height (h) of the tree?
asked by Valentine 
chemistry
I need assistance with this question please. "The equation of the line for a graph of voltage (Ecell) versus log[Cu2+] was y= 0.0166x  0.0082. The voltage of a solution with an unknown [Cu2+] was measured against the same reference cell, under the same
asked by upthecreek 
physics
what can you say about the forces on a brick lying still on the floor?
asked by alilil 
Writing
I am trying to cite the novella Aura for my works cited page. Fuentes, Carlos. Aura. Bilingual Edition, New York, 1965 Is this correct?
asked by Hannah 
Writing
I am writing a paper on the novella Aura by Carlos Fuentes and so far I have a few paragraphs. I was just wondering if I were to post what I have so far would someone be able to proread it for me? I am mostly worried about grammatical errors.
asked by Hannah 
science
What fossil fuel is pumped through underground pipes and what is the name of the energy resource from underground that turns to ash as it burns.
asked by Dr. House 
Physics
A rocketpowered hockey puck has a thrust of 2.40 and a total mass of 1.40 . It is released from rest on a frictionless table, 2.90 from the edge of a 1.80 drop. The front of the rocket is pointed directly toward the edge. How far from the table does the
asked by Dan 
Environmental engineering
Ottawa’s anaerobic digester produces 13 m^3/day of sludge with a suspended solids concentration of 7.8%. What volume of sludge must they dispose of each year if their sand drying beds yield a solids concentration of 35%.
asked by Massiel 
algebra 2
10 cm^3 of normal specimen of human blood contain 1.2g of hemoglobin. How many grams does 40cm^3 of same blood contain? Thank you.
asked by Esther 
chemistry
Fe3+ is added to excess Ag+ prior to titration with KSCN. When all the excess Ag+ has reacted, the red complex of Fe(SCN)2+ forms. This red complex is visible when the [SCN] is about 2x10^4M. at this pt. >99% (but not all) of the Ag+ has precipitated.
asked by emily 
Science
What is the name of the energy form that can damage buildings if too much of it is present? and What is the name of a form of renewable energy that comes in and out regularly.
asked by Capone 
Math
Hi Trying to work with confusing Taylor series....any assistance would be much appreciated!! How can I use T(x)=59((x2)^2)3((x2)^3) to approximate the f(0) ???? I realize that Taylor series f(x)=f(a)+f'(a)(xa)+f''(a)((xa)^2)etc... but the above T(x)
asked by Kiksy 
HELP! URGENT! (geometry)
Helen stands 66 m away from the base of the tree. If the line of sight makes an angle of 30 with the top of the tree with respect to the horizon. What is the height (h) of the tree?
asked by Valentine 
Converting Roman numerals to arabic Numbers
1) CCXIX C = 100 X = 10 I = 1 because there are 2 C's I added them together and I got 200 because there are 2 X's I added them together and got 20 because there is 1 I that equaled 1 So I added 200 + 20 + 1 = 221 which is my final answer But according to
asked by Rina 
english
Which is the most effective coordinating conjuction to join the following independent clause? Miriam wants a digital picture frame, She cannot afford one just now should i use for, so, and ,or but
asked by elexis 
Math
An NFL punter at the 15yard line kicks a football with an initial velocity of 95 feet per second at an angle of elevation of 28 degrees. Let (t) be the elapsed time since the football is kicked. a. Write the parametric equations of this problem. b. With
asked by Robert 
chemistry
what are the products of electrolysis of the following solutions? A. potassium iodide B. nickel sulphate C. magnesium chloride
asked by Anonymous 
Physics
Marcus and Santa are sliding down a snowy hill that is 13.3 m high. On the hill itself friction and air resistance can be ignored. At the bottom of hill the sled hits a long patch of rough snow that slows the sled down by exerting an average force of 170
asked by Mr superman 
Evolutionary Science (stemlineage?)
I'm reading this article and it says the following: "the PRL regulatory gene HoxA11 experienced a period of strong positive selection in the stemlineage of eutharian mammals" What does this mean? I'm not to sure what they mean when they're referring to
asked by Lena 
Physics
A dock worker loading crates on a ship finds that a 24 kg crate, initially at rest on a horizontal surface, requires a 64 N horizontal force to set it in motion. However, after the crate is in motion, a horizontal force of 46 N is required to keep it
asked by Bill 
maths
a leisure centre recordsthe number of visitors each week in one particular week there were 1372 visitoros the following week the number of visitors was 900 to the nearest hundred! what is the smallest number of visitors that could have visited the leisure
asked by chloe 
Chemistry
SO3 + H2O = H2SO4 If you react 34 g of water and have excess SO3, how much H2SO4 would you theoretically produce?
asked by Anonymous 
math
19% of 98
asked by Anonymous 
algebra 2
Hat sizes are determined by measuring the circumference of one's head in either inches or centimeters. Use ratio and Proportion to complete the following table. Hat Size: Hat size: 7 1/4, 7 1/8 Head circum to nearest 1/5 22/45. Head circum to the nearest
asked by Esther 
Calculus
Let y(x)=ln(cosh(x)+ sqrt(cosh^2(x)−1)) Find the derivative Dxy= I don't know what to do with this...
asked by Patrick 
calculus
A rocker arises from its launching pad with a velocity given. By 0.1 h m/s ,where h m is the height reached by the rocket at that time.the rocket is obserrvved from 2000 m away from the launch pad.at. What rate is the distance of the roocket from observer
asked by mehak 
Word Problem
A grander want to create a triangular garden in the shape of a right triangle with shortest side length x6y ft. and the middle length side x + 6y ft. what is an algebraic expression for the area of the garden? Be sure to multiply this out and express in
asked by Miguel 
chemistry
calculate the volume of water in mL needed to make 75% solution containing 50g of CaCl2
asked by Quinne 
calculus
how do i use a taylor series centered at some x value to approximate the value of the function centered at a different x value? for example, if im given some taylor series centered at 5 of f(x) but i want to find f(3), how do i do this? (btw that example
asked by Marli 
Physics
A water tower is filled with fresh water to a depth of 6.38 m. What is the water pressure at a depth of 3.96 m?
asked by Megan 
essay
What are some suggestion regarding should the driving age be raised to 18?
asked by kate 
chemistry
a) Aluminum Chloride has a universal indicator color of red and the Ph of 4.0 b) Sodium Carbonate has a universal indicator color of violet and the Ph of 9.5. c) Ammonium Acetate has a universal indicator color of green and the Ph of 7.5 For the following
asked by samuel 
maths
what is the circumference the radius the arc the chord the diameter
asked by jake 
chemistry
A certain voltaic cell has a standard cell voltage of 1.22 V, and 3 electrons are transferred in the overall cell reaction. What is the value of the thermodynamic equilibrium constant for this cell reaction at 298K?
asked by will 
Englishwriteacher
Hey, I just wanted to let you know that I got the grade back for that english paper you helped me write a few weeks back...the movie analysis on A Walk to Remember. I got a B! : ) But I have a chance to revise it according to the teachers comments and turn
asked by y912f 
math
how many differnt squares are in each figure ? count the small squares first ,then move up to the next size ,and so on .Record the total number of squares below each figure and look for a pattern?
asked by cindy 
physics
A new record for running the stairs of the Empire State Building was set on February 3, 2003. The 86 flights, with a total of 1576 steps, was run in 9 minutes and 33 seconds. If the height gain of each step was 0.20 m, and the mass of the runner was 68 kg,
asked by Alan 
chemistry
whta are the products of electrolysis of the following solutions? potassium iodide nickel sulphate and magnesium chloride
asked by Anonymous 
Math
If there is 31days in Janurary, and the first day begin on Thursday. How do I determine four weeks and seven days. Do I count the first three days as week one. Followed with the remaining three weeks.
asked by Caroline 
maths
which one of these numbers 9,15,25,45,50,64,100,125,175 has a cube root of 5
asked by sara 
English
I have to write an argumentative paper on the topic: Recent changes to Georgia's HOPE scholarship program. To start off I wanted to conduct some research on the topic, but I only want to use good secondary sources from academic websites or something like
asked by y912f 
algebra
Try graphing the following two equations. Eq 1 y = 2x + 3 Eq 2 y = 2x + 1 How are these two lines related? What is the solution for this systems of equations?
asked by bianca, pleeease help i'm lost 
Readingphonics
I just want to get someone's opinion on a question that was on my son's reading test. He's in first grade. Which word has the same beginning sounds as spring. A. spin B. stripe C. spray The answer is C could A not also be an answer. I know the spr in both
asked by Tracy 
algebra 1
I don't understand how to divide monomials with negative (or positive, for that matter) powers. Please help!!!!
asked by sarah 
use equation to complete the function table
y=5x+3
asked by Laurin 
math
how do you solve: y=2x1
asked by Lose 
Physics
A 30.0 ball rolls around a 50.0 diameter Lshaped track, shown in the figure, at 60.0 . What is the magnitude of the net force that the track exerts on the ball? Rolling friction can be neglected.
asked by Dan 
chemistry
How many milliliters of 3.0 M hydrochloric acid are i required to prepare 500 milliliter of 1.0 M Hydrochloric solution
asked by Dylan 
History
The results of the 1912 election prove that Americans were ready for change and reform across the board. Each candidate offered their own view on how changes should be implemented and which issues needed change, ultimately the voters showed they wanted an
asked by David 
Math
What operation is used to change a fraction in simplest form to an equivalent fraction? What operation is used to change a fraction to simplest form?
asked by Marilyn 
calculus repost, please assist pleassssssse
Hi Trying to work with confusing Taylor series....any assistance would be much appreciated!! How can I use T(x)=59((x2)^2)3((x2)^3) to approximate the f(0) ???? I realize that Taylor series f(x)=f(a)+f'(a)(xa)+f''(a)((xa)^2)etc... but the above T(x)
asked by kiksy 
algebra
The area of the top of a triangular corner desk must be at least 7 sq. ft. If the base of the triangular desk top needs to be four feet, what should the height be?
asked by Amy 
Math
how would you graph: x=7
asked by MeMi 
Calculus
Find dy/dx in terms of x and y if xlny+y^6= (9)lnx
asked by Catherine 
physics
Engineers are trying to create artificial "gravity" in a ringshaped space station by spinning it like a centrifuge. The ring is 120 m in radius. How quickly must the space station turn in order to give the astronauts inside it apparent weights equal to
asked by olga 
physics
When you put water in a kitchen blender, it begins to travel in a 7cmradius circle at a speed of 1 m/s. How quickly is the water accelerating?
asked by olga 
Chemistry
what would be the molarity of a KOH solution if 15 mL of the solution required 22.3 mL of 0.085 M HCl to react with the base?
asked by Anonymous 
math
arrange the digits 19 by inserting plus or minus signs using each ditit only once to produce a total of 200
asked by bg 
math
The larger circle has a radius that is 18 inches longer than the smaller circle. The larger circle has a circumference that is A pi feet larger then the smaller circle. find the value of a.
asked by dan 
math
how do you solve: 3y=3x9 and 2x4y=12 and 3x=2y
asked by maya 
physics
You raise a bucket of water from the bottom of a deep well. If your power output is 128 W, and the mass of the bucket and the water in it is 6.00 kg, with what speed can you raise the bucket? Ignore the weight of the rope.
asked by Alan 
history
11. A key technological development that began around 500 B.C.E. in subSaharan Africa was
asked by Anonymous 
Physics
A clerk moves a box of cans down an aisle by pulling on a strap attached to the box. The clerk pulls with a force of 174.0 N at an angle of 27.0 degrees with the horizontal. The box has a mass of 39.0 kg, and the coefficient of kinetic friction between the
asked by Chris 
Physics
A car accelerates at a constant rate from 13m/s to 25m/s in 6.0seconds. What was its acceleration? How far did it travel in this time?
asked by Emily Grossman 
Math
A right square pyramid’s base has edges measuring 20 feet each. If the pyramid’s height is 27 feet, what is its volume, in cubic feet?* *Could you include an explanation as well?
asked by K 
Physics
A 1900 car starts from rest and drives around a flat 50diameter circular track. The forward force provided by the car's drive wheels is a constant 1300 . A) What is the magnitude of the car's acceleration at ? B) What is the direction of the car's
asked by Dan 
Inorganic chemistry
predict the product of the ff.reactions: C3H6 + HF C3H6 + H2O C3H6 + Cl2
asked by gel 
PHYSICS
A thundercloud has an electric charge of 43.2 C near the top of the cloud and 38.7 C near the bottom of the cloud. The magnitude of the electric force between these two charges is 3.95 x 106 N. What is the average separation between these charges? I'm
asked by ELIZA 
caculus
find the nth derivative of 2/(x+1) what i have so far is (?)(x+1)^(n1) i having trouble with finding the first number without using factorial. 2^(n1) works for the first few but not after that
asked by amy 
geometry
The diagnol of a rectangle is 20 inches. The width is 4 inches shorter than its length.
asked by jane 
Chemistry
Are binary compounds ionic or covalent? If they are covalent? If they are covalent, I thought they don't form bonds that way, since they share electrons.
asked by Emily 
calculus ( help please )
The troough down the center of the ccattle barn is 40 cm wwide at thhe top and 20 cm at the botttom .it is 30 cm deep and 8 m long . It iis filled at a rate of 10 dm3/min. What is the rate of rise of water level . I tried it and me ans is pretty close but
asked by mehak 
RESEARCHTHEORIES
What is the difference/definitions of implicit and explicit theories? To be more specific, in social sciences, but I don't think that really matters.
asked by Lela 
Chemistry
Are binary compounds ionic or covalent? If they are covalent, I thought they don't form bonds that way, since they share electrons.
asked by Emily 
Writing
Can you grade me out of 12 points? Did I have any voice? Proofread my writing. A Valuable Item A valuable item is something that’s given to you by a special someone that you will have forever to the end. Many people have valuable items that they love,
asked by Ramona 
algebra
How to factor 4x^3 4x+16 ? how can i factor it when its missing the ^2 term ?
asked by Mehak 
math
what is A = 37.5 cm 2,b = 8 in.;h =
asked by leah 
pre Algebrs
7 is 175% of what number
asked by Rosa 
Calculus
A 17 foot ladder is leaning on a 6 foot fence. The base of the ladder is being pulled away from the fence at the rate of 5 feet/minute. How fast is the top of the ladder approaching the ground when the base is 6 from the fence? [Note: The ladder is
asked by Anonymous 
Math
The surface area of a particular cube is 600 square inches. When the edges of the cube are doubled in length, what is the volume of the new cube, in cubic inches?
asked by ABC123DoReMi 
anonymous
1.) an account invested in a month market fund grew from $67,081.20 to $67,359.39 in a month. What was the interest rate, to the nearest tenth? 2.)you are due a tax refund of $760. your tax preparer offers you a nointerest loan to be repaid by your refund
asked by math i have a few questions.hepl pls ty 
Calculus
e^[((xa)^2)/b] b>0; local max at x=7 and points of inflection are x=5 and x=9. Find the formula... y=
asked by Miley 
math
A = _,b = 12yd,h = 16 yd
asked by leah 
Statistics
In 2002 John Daly led the PGA tour in driving distance with an average drive of 305.5 yards and a standard deviation of 17.2 yards. Assuming that these distances are normally distributed, 80% of John Daly's drives are longer than what distance?
asked by Sam 
chemistry
find the percent of BaBr^2*4H^2O
asked by Natalie 
Algebra
Could you please help me with this linear combination? Thank you! 8x6y=10 4x5y=3
asked by Anna 
math
if sam earned $4,000 and gave 1/5 wawy and invested 1/2 of the remaining amount how much did he have left?
asked by Brittney 
Insurance Forms
I need help with a few questions. Could you let me know if I'm going in the right direction. 1 CHAMPVA would be considered a primary payer for a patient who has ______ coverage. A Medicaid B feeforservice C Medicare D SSI Answer: A 2 You should
asked by BB 
physics
If an elevator with mass of 4850kg is designed to have a maximum acceleration of .068g (g is gravity acceleration). What are the maximum and minimum forces the motor should exert?
asked by Mark 
world history
Many early historians tended to look at the past in terms of A. Random cycles B. Continuities and discontinuities C. Innovation and change D. Progress and decline I think D but I'm not sure. Please help!
asked by nicole 
chemistry
At 22.0 degrees Celsius , a student collects H2 gas in a gas collecting tube. The barometric pressure is 755.2mm Hg and the water levels inside and outside the tube are exactly equal. What is the total gas pressure in the gas collecting tube?
asked by Cassie 
english
We sat across from each other during Peggy's recital.
asked by sam 
inorg, chem
please help me to solve it, thank you so much in advance: propose organic compounds that are isolable with 1. Mn(CO)5(CpCo)(CpCo)C(Co(CO)4)3 2. Cr(CO)4(ìPH)Cp*Mn(CO)
asked by bun 
physics
does sunlight warm your body with light waves yes or no and why
asked by omar 
chemistry
what is the molarity of solution made from the equivalent of 125 g of sodium nitrate in 1.0 l of solution
asked by andrew b 
math
what is the answer to 183(2times2)?
asked by lidia 
chemistry
what final volume in liters of a 2.5 m solution of sodium nitrate can be made using 25.0g of solution
asked by andrew b 
chemistry
what mass in grams of sodium nitrate is needed to make 85.o ml of a 0.2500 m solution
asked by andrew b 
stats
in major league baseball there are two leagues that compete to make the play offs the american league has three divisions the east and cental divisions with 5 teams each ad the west division with 4 teams the national league is made up of the east and west
asked by lisa 
Calculus
Find dy/dx in terms of x and y if xlny+y^6= (9)lnx
asked by Catherine 
Calculus
Find dy/dx in terms of x and y if (x−a)^9+y^9=a^9. Assume that a is a constant.
asked by Cesar 
chemistry
) Aluminum Chloride has a universal indicator color of red and the Ph of 4.0 b) Sodium Carbonate has a universal indicator color of violet and the Ph of 9.5. c) Ammonium Acetate has a universal indicator color of green and the Ph of 7.5 For the following
asked by roshan 
math
Equivalent fractions 1/2,6/10,9/27,4/16
asked by gina 
Algebra
12(74y  (6+5Y  8Z) = Please show work
asked by Todd 
science
what are some things that mitosis and meiosis have in common and some things they dont?
asked by genesis 
chemistry
Calculate the pH of a solution resulting from the addition of 10.0 mL of 0.10 M NaOH to 50.0 mL of 0.10 M benzoic acid (Ka = 6.5 x 10 5
asked by haley 
Physics
A raindrop (mass=1.00g) is travelling at a speed of 40m/s when it hits the surface of 100g of water contained in a drinking glass. What is the change in temperature of the water in the glass if we assume that i)all the kinetic energy of the raindrop is
asked by John 
hitting a hard floor
i weigh 200 drop to hard floor what the force of the falll I'm 5ft 1?
asked by kissme 
math
178 divided by 9.6 =
asked by Anonymous 
Organic Chemistry
How many grams of 2propanol are expected from the complete reaction of 111 g of propene?
asked by Samantha 
algebra
A man wants to build a rectangular pen in which to keep his dog. If he uses one side of his barn, what is the maximum area that he can enclose with 80 meter of fencing?
asked by ana 
History
The results of the 1912 election prove that Americans were ready for change and reform across the board. Each candidate offered their own view on how changes should be implemented and which issues needed change, ultimately the voters showed they wanted an
asked by David 
calculus
16 over 18 =20 over x
asked by Anonymous 
calc
find the arc length of f(x)=x^2/2
asked by tom 
Science
How do the bacteria within a deepsea tubeworm( residing near hydrothermal vents) affect the environment around them?
asked by Brendan 
maths
A party of bush walkers have an average speed of 50km/minute and walk for 4 hours on a bearing of 231°T. they then walk for 6(1)/(3) hours on a bearing of 117°T. Find a.How far are they from bas e camp? b. The bearing they must travel along to get to
asked by Tammy 
Maths
Two cyclists depart from the same point. One travels due East at 18km/hr while the other travels NorthWest at 20km/hr. How long will it be before they are 80km apart?
asked by Tammy 
social studies
if a person's family grew wheat and corn and they needed cloth for a new shirt.what might have the family barted to get the cloth that they needed?
asked by alexander very important!!! 
Quadratic Equation
The dimensions of a rectangle are such that its length is 3 in. more than its width. If the length were doubled and if the width were decreased by 1in., the area would be increased by 150 in.^2. What are the length and width of the rectangle?
asked by Brandon 
algebra
When priced at 300 pesos each, a toy has an annual sales of 4000 units. The manufacturer estimates that each 10 pesos increase per unit will decrease the sales by 100 units. Find the unit price that will maximize the total revenue.
asked by john 
Chemistry
Waht is the mass in mg of 0.016 moles of glucose (C6H12O6)?
asked by Ashley 
science
what kind of heat transfer causes earth's major wind patterns
asked by molly 
accounting
True or false ? The columns of the employee earnings record consist of the amount columns in a payroll register and accumulated earnings column? Can you help me answer this question ? thank you.
asked by mike 
math science
How do you solve (1+tanX)/(sinX)using identities? I got cscX
asked by lowy 
chemistry
Aluminum Chloride has a universal indicator color of red and the Ph of 4.0 b) Sodium Carbonate has a universal indicator color of violet and the Ph of 9.5. c) Ammonium Acetate has a universal indicator color of green and the Ph of 7.5 For the following
asked by roshan 
chemistry
what is the concentration in percent by volume of 25.0 mL of rubbing alcohol (C3H7OH) diluted to a volume of 200.0 mL with water? I got 12.5% am i correct??
asked by annonimous 
physics
A certain car is capable of accelerating at a uniform rate of 0.82 m/s2. What is the magnitude of the car’s displace ment as it accelerates uniformly from a speed of 85 km/h to one of 95 km/h? Answer in units of m.
asked by maria 
Geography
I have to do a 3d project of the Andes and I am looking for some ideas please help me.
asked by Sarah Watson 
sound and music
How long is an open organ pipe with a fundamental frequency of 493.88 Hz?
asked by Harie 
math
The first three terms of a geometric sequence are 2, 10, 50, and the 8th term has a value of 156,250. What is the value of the 7th term?
asked by Evelyn 
biology
If an elodea leave is place in pure distilled water, what will happen? plus will this be isotonic or hypertonic or hypotonic solution.
asked by Ceci 
math
how would you do this problem 25/40x=50
asked by Tony 
physics
Two Astronauts A and B are working in the space shuttle in the space.Suddenly the hammer falls from the hands of astranaut in space. who will hear most sound,Astranonaut A or B .and why?
asked by christina 
math
Find all the two digit prime numbers neither of whose digits are prime. Someone helped me yesterday but I do not understand.
asked by Diana 
math :)
Solve for x: 6(x+3) =2x +27
asked by Lesly 
math
Mia has a small garden in the shape of a trapezoid as pictured at the top of the next column. The parallel sides of the garden are 5ft and 15 ft. these parallel sides are 10 feet apart. What is the area of the garden?
asked by Evangelise 
math
How many twodigits multiples of 3 are factors of 144?
asked by Angie 
Mechanical Engineering Sci.
Use the parallelogram of forces method to determine the magnitude and direction of the resultant of the forces given:1.7N at 45 and 2.4N at 60.
asked by Godknows 
math
Eighty students participate in an after school enrichment program consisting of science and creative writing. If 540 of the students take science and 45 take creative writing, how many take both subjects?
asked by Ryan 
trig
1/4tan(2x)
asked by erik 
computer
how to draw a flow chart to find isoscles triangle
asked by Anonymous 
math
Write an equation that satisfies the relationship shown in the table of value. x y 2 0 0 4 2 8 5 14 8 20
asked by alexa 
math
Which of the following inequalities has x>4 as a solution A: 6x < 24 B: x+4>0 C: 5x+2 14
asked by iliana 
chemistry
What are the concentrations of H3O+ and OH and what is the pH of a 0.15 M solution of Na2CO3 (at 25 °C).
asked by darren 
physics
A 747 jetliner lands and begins to slow to a stop as it moves along the runway. If its mass is 3.50x^5 kg. Its speed is 27.0 m/s, and the net braking force is 4.30x10^5 N. (a)what is its speed 7.50 s later? (b)how far has it traveled in this time?
asked by Dakota 
Calculus
If f(x)=0.5x+3 then what is fofofof? (composite function)
asked by Zukii 
math
using triple integral, find the volume of the solid bounded by the cylinder y^2+4z^2=16 and planes x=0 and x+y=4
asked by luthfi 
physics
What is the electric potential at the center of the square shown in the figure below? Assume that q1 = 1 x 108 C, q2 = 2 x 108 C, q3 = 3 x 108 C, q4 = 2 x 108 C and d = 1 meter.
asked by ikemaze 
spanish
esta empezando a hacer frio. comprar un abrigo.
asked by catrina 
Algebra 2
The question says to make a statement about Log A over B & Log B over A & prove it. How do I answer?
asked by Ana 
physics
10. A 5 meter length of wire has a charge density of 3 x 103 C/m. What is the electric field strength E at an axial distance of 0.25 meters from the wire?
asked by ikemaze 
physics
11. The charged plates of a parallel plate capacitor each have a charge density of 3 x 103 C/m2. What is the electric field E between the plates?
asked by kb 
geometry
A ramp is built by putting a triangle on top of a trapezoid. How long is the ramp?
asked by Anonymous 
Math
a frame is made from a 28 inch length of trim and surrounds a 48 square inch picture. solve for the dimensions of the picture
asked by Hailey 
Chemistry
the specific heat of a substance is the energy (Joules) required to raise one gram of substance by one degree celsius (units J/g°C). Heating 225.0° cm3 of a solid from 36.1° to 74.3°C takes 35850 J of energy. The density of the solid at 36.1°C is 1.75
asked by Ally 
math
how do i solve this problem? 4n+5m26n+43m
asked by joe 
math
how do I express these decimals as fraction in lowest terms? 9.8 and 1.6666666
asked by nina 
Math
how do you graph, y=2/3x2
asked by Lose 
Math
a carnival has a duck pond booth. You choose a rubber duck at random,7 ducks marked as largeprize winners, 9 ducks marked as medium prize winners, and 26 ducks marked as small prize winners. What is the theoretical probability of winning a small prize at
asked by Devonte 
Psychology
In testing a theory what type of informal research method did you use?
asked by Sensystar 
Social Studies
How did America Respond to Independence?
asked by Anonymous 
engineering mathematic
using triple integral, find the volume of the solid bounded by the cylinder y^2+4z^2=16 and planes x=0 and x+y=4. please help to solve this problem
asked by luthfi 
algebra
I have a problem with break even analysis? the question is I'm trying to find the cost between 2 businesses to care for my lawn. The one company has an initial fee of $200+$50an hour for labor cost and the second company has an initial cost of $300+$25an
asked by Sylvia 
geometry
The sum of the lengths of the sides of triangle ABC is 25 in. The lengths of sides AB and BC are 9 inches and 8 inches. Find the length of side AC and classify the triangle.
asked by Portia 
Math
Find x > 3 such that ln(x) < x^(0.1)
asked by Alex 
sociology
How can the three sociological perspectives (e.g., social functionalism, social conflict, and symbolic interaction) be used to conceptually understand multiculturalism?
asked by Kim 
Algebra Please Help
I have been out of school for a long time and not understanding these questions. Please help why is 5^0=1 can you explain when (3)^n is positive and when it is negative.
asked by Shawn 
chemistry
Aluminum Chloride has a universal indicator color of red and the Ph of 4.0 b) Sodium Carbonate has a universal indicator color of violet and the Ph of 9.5. c) Ammonium Acetate has a universal indicator color of green and the Ph of 7.5 ....For the following
asked by roshan 
math
thanks psyDAG for answering the question below but, can you show how to solve using an equation..x=length and y=width? a frame is made from a 28 inch length of trim and surrounds a 48 square inch picture. solve for the dimensions of the picture
asked by Hailey 
Physics
The four tires of an automobile are inflated to a gauge pressure of 1.84E+5 Pa. Each tire has an area of 0.0237 m2 in contact with the ground. Determine the weight of the automobile.
asked by Megan 
chemistry
Which of the following is true for the gas phase reaction shown below? 4NH3(g) + 5O2(g) ¨ 4NO(g) + 6H2O(g), ƒ¢H = 0.905 kJ
asked by cheryl 
Algebra
Explain why the addition method might be preferred over the substitution method for solving the system 2x3y=5 5x+2y=6
asked by Amy L 
math
How do I determine which piece of fabric is the longest (2 3/4 yards of mink), 6 feet of silk), or (108 inches of Velvet)
asked by Marilyn 
algebra
If my equation that I wrote does it matter how it is written. Does it matter if I write it' $200+$50h=c or c=$200+$50h or c=$50h+200
asked by Sylvia 
English  Native speakers
Hello! When you are writing the unknown words f.e. on the board can you write the following or is something else correct (I am referring to articles): an aim a counterrevolution a supporter a square a mayor a green area a pedestrian zone So should
asked by Mark 
Calculus Please Help
A) If x^2+y^3−xy^2=5, find dy/dx in terms of x and y. dy/dx=________ B) Using your answer for dy/dx, fill in the following table of approximate yvalues of points on the curve near x=1 y=2. 0.96 ______ 0.98 ______ 1.02 ______ 1.04 ______ C) Finally, find
asked by Catherine 
Math
The volume of a rectangular slab of concrete needs to exceed 72cu.ft. If the length is 12ft. and he width is 8ft. How thick does the concrete slab need to be?
asked by Pista 
Physics please help!!
Piston 1 has a diameter of 0.524cm Piston 2 has a diameter of 5.64 cm. In the absence of friction, determine the force required on piston 1 necessary to support an object, m, with weight 1072 N. (Neglect the height difference between the bottom of the two
asked by Megan 
algebra
For me to solve the system of equations for the total cost of lawn care using the tequnique substitution am I right to say: c=$200+$50h c=$300+$25h would be c=$250 c=$325
asked by Sylvia 
math
If x+y=10 and xy=2, what is that value of x?
asked by Rosie 
american government
write a letter to the a presidential canidate in 2008 based on results of Pennsylvania polls
asked by Robin 
math
The quotient of a number and 2\3 is 9\10. What is the number?
asked by giana 
Math
If a race car travels a circular track, total 1 mile. What is its displacement?
asked by Alex 
pyhsics
At t= 1.0s, a 0.61 kg object is falling with a speed of 6.0 m/s. At t= 2.0s, it has a kinetic energy of 25 J. 1. What is the kinetic energy of the object at t= 1.0s? 2. What is the speed of the object at t= 2.0s? 3. How much work was done on the object
asked by Alan