Questions Asked on
November 24, 2014

Math Help!
Mrs. Miller sells a house for $179,000. If she earns a commission of 6%, how much money does she earn? Write a porportion and show your work. My answer 179,000/100=x/6 107400=100x 10,740=x Am I right? Thank you
asked by Callie 
Math I need help ASAP! I'm getting timed
Which ratios form a proportion? 1. 4/12 , 6/8 2. 16/12 , 3/4* 3. 3/2 , 15/14 4. 10/16 , 5/8 Which ratio forms a proportion with 9/15? 1. 6/10 2. 16/21 3. 36/50 4. 45/70 A textbook weighs 2.5 pounds. How many kilograms does the textbook weighs? Round your
asked by Lelo 
Social Studies
Which of the following is the largest ethnic group in china A.Han B.tibetan C. Uighurs D. Hui Which of the following is the staple crop of the north China plain A. Barley B. Rice C. Soybeans D. Wheat Crops grow well on the north China plain because the
asked by Anna 
Language Arts
1.)Which of the following sentences contains parallelism? a.)We sold two bikes at the garage sale, and we also sold four chairs, as well as receiving offers for three lamps. b.)I prefer new things, but some people like to buy things that other people have
asked by Vicky 
maths
a 4 cm long chord subtends a central angle of 60° . the radial segment of this circle is
asked by alishbah 
math
Caroline runs 3 and one half miles in 221 over 4 minutes. How many miles does she run per minute?
asked by cece 
Math Help!
The bill at a restaurant is $100, and Mrs. Johnson wants to leave a 15% tip. Approximately how much money should she leave? A. About $5.00 B. About $10.00 C. About $15.00 D. About $20.00 Is the answer C? Thank you
asked by Callie 
Math
Which ratios does NOT form a proportion? 1. 24/96 , 27/108 2. 17/102 , 12/70 3. 21/51 , 35/85 4. 45/75 , 63/105 Which ratios form a proportion? Use cross products to test each pair. 1. 9/17 , 27/50 2. 12/35 , 24/75 3. 15/55 , 33/ 121 4. 12/35 , 20/70 Which
asked by Lelo 
Math Help!
ALice plays basketball. In one game she shoots 21 free throws and makes 81.25% of them. Estimate how many free throws she makes. A. About 16 B. About 2 C. About 20 D. About 14 Is the answer A? Thank you
asked by Callie 
reading
Joseph Palmer In 1830, a Massachusetts farmer named Joseph Palmer moved to the city, only to find that people continually reacted to him with anger and hatred. Why? Palmer certainly wasn’t an amoral man—no, he had a strong sense of right and wrong. He
asked by yaiay 
chemistry
If you need to multiply the following reaction by 2 to be an intermediate reaction in a Hess's law problem, what would be the final value for the enthalpy of reaction you use for this intermediate reaction? C2H4 + 3 O2 2 CO2 + 2 H2O, H = 1410 kJ
asked by Anonymous 
English
So i have to do this newspaper article about the lamb to the slaughter.. What would be a creative headline.. this is the situation i am doing it on.. The seemingly unsolved murder of Patrick Maloney is reported .
asked by Thi. 
Int.Science/laws of thermodynamics
Watch the heat engine animation in the lesson text above. Does this animation illustrate a "new and improved" heat engine? yes no
asked by Casey 
physics
Suppose that you have a masa os 45.7 kg and are standing on frictionless roller skates. Someone then throws you a 2.50 kg mass with a velocity of 14.5 m/s and you catch it. What will be your resultant velocity?
asked by yami 
College Physics
A weightlifter has a basal metabolic rate of 64.6 W. As he is working out, his metabolic rate increases by about 650 W. (a) How many hours does it take him to work off a 450 Calorie bagel if he stays in bed all day? (b) How long does it take him if he's
asked by Maria 
physics
A 3.02 kg mass attached to a light string rotates on a horizontal, frictionless table. The radius of the circle is 1.2 m, and the string can support a mass of 33.8 kg before breaking. The acceleration of gravity is 9.8 m/s 2 . What maximum speed can the
asked by Truman 
physics
If an atom has an electron in the n = 5 state with ml = 3, what are the possible values of l?
asked by Lee 
Math Help!
Estimate 48% of $20.00. A. About $12.00 B. About $11.00 C. About $15.00 D. About $10.00 Is the answer D? Thank you
asked by Callie 
business math
Family Flowers employs 17 people, of whom 14 earn gross pay of $640 each and 3 earn gross pay of $720 each on a weekly basis. What is the employer
asked by Jerrick Chaffin 
MAT201Basic Statistics
A dealership sold 15 cars last month. The purchase price of the cars, rounded to the nearest thousand, is represented in the table Purchase Price/# of cars sold $15,000 3 $20,000 4 $23,000 5 $25,000 2 $45,000 1 A.Find the mean and median B. Which measures
asked by Pat 
CHEMISTY HOMEWORK HELP ASAP
1.) Quantify the pH for a solution prepared by dissolving 0.050 moles of Acetic Acid (CH3COOH) and 0.20 moles of Sodium Acetate (CH3COONa) in water and adjusting the volume to 500 mL. The pka for Acetic Acid (CH3COOH) is 4.75. 2.) Should 0.010 moles of
asked by Always 
soran university
1. Which salt is LEAST soluble at 0 ºC? 2. How many grams of sodium nitrate, NaNO3, are soluble in 100 g of water at 10 ºC? 3. When 50 grams of potassium chloride, KCl, is dissolved in 100 grams of water at 50 ºC, the solution can be correctly described
asked by zagros 
Beryl
Pb3(ASO4)2.the solubility product expression
asked by Gift 
Math Help!
Which proportion can be used to solve the following percent problem? What is 50% of 70? A. x/70=50/100 B. x/50=70/100 C. 50/70=x/100 D. 70/x=50/100 Is the answer B? Thank you
asked by Callie 
Math
Given TriangleABC with a = 9, b = 15, and m
asked by Anonymous 
Chemistry
how many Kj of heat are evolved when 6g of pure carbon is completely burned? how many grams of carbon must be burned to furnish 39.3 kJ of heat. enthalpy of combustion of carbon is 393.5
asked by Shabana 
Math
Tom Invested $7,000 at 6.5% interest compounded monthly. How much will be in this account after 18 months?
asked by Billy 
Brief Calculus
Find the area of the indicated region. We suggest you graph the curves to check whether one is above the other or whether they cross, and that you use technology to check your answer. Between y = −x and y = −x^3 for x in [−1, 1]
asked by Matt 
MATH
Al saves pennies . He agrees to give 1/3 of his pennies to Bev if she would give 1/3 of what she got from Al to Carl and if Carl in turn would give 1/3 of what he got from Bev to Danni. Bev, Carl and Danni agreed and recived 9 pennies. hOW MANY PENNIES DID
asked by Connie 
Math with business apps
Tom invested $7,000 at 6.5% interest compounded monthly. How much will be in this account after 18 months?
asked by Jenna 
chemistry 2
A certain laser uses a gas mixture consisting of 9.0 grams of Hydrogen chloride, 2.0 grams Hydrogen gas, and 165.0 grams of Neon. What pressure is exerted by the mixture in a 75.0 liter tank at 22 degree Celsius? Which gas has the smallest partial
asked by angelveb 
MATH
In a fraternity with 38 members , 18 take math, 5 take both math and literature and 8 take neither math or literature. how many take literature but not math? I came up with 16 is that correct or am i lost ?
asked by WINSTON 
English
In American English, a collective noun used as a unit takes _____ verbs and pronouns. singular plural
asked by Casey 
math
Ms.Johnson gives twice as much daily homework as Mr. Beach. Mr.Beach gives out 10 minutes less than Mrs.Rodriguez. if Mrs.Rodriguez gives 35 minutes of homework,what is the total amount of homework given by the three teachers?  So do you just half it
asked by Destinee 
Chemistry
For the reaction CaCO3(s)+ 2HCl(aq)= CaCl2(aq)+ CO2(g)+ H2O(l) how many grams of CaCl2 can be obtained if 14.6 g HCl is allowed in CaCO3?
asked by Lita 
physics
Please Help!! How much power is developed by a jumbo jet that cruises at 250 m/s. When the trust of its engine is 100,000 N? Thanks!!!
asked by yena 
Chemistry
The equilibrium constant for the reaction H2 + I2 > 2HI, is 54 at 425 degrees C. If the equilibrium mixture contains 0.030 M HI and 0.015 M I2, calculate the equilibrium concentration of H2.
asked by Hannah 
Algebra
99 inch pipe is cut into two pieces. One is two times the length of the other. Find the lengths of the two pieces
asked by Anonymous 
Chemistry
Provide the name(s) for the branched constitutional isomer(s) with the molecular formula C7H16 that have three methyl groups.
asked by James 
Chemistry Physics
What frequency is heard by an observer who hears the 450 Hz siren on a police car traveling at 35 m/s away from her? Assume that the velocity of sound in air is 345 m/s. Is this the correct? 450*345/(345+35) =408Hz
asked by Ben 
Math  ratio
Mr. Rahim had the same amount of money in his three bank accounts at first. He deposited $44 into account b and $ 80 into account c. In the end, the ratio of the amount of money in account a to the amount of money in account c was 2:7. How much money was
asked by Anonymous 
Chemistry Homework Help Please!
1.) Quantify the pH for a solution prepared by dissolving 0.050 moles of Acetic Acid (CH3COOH) and 0.20 moles of Sodium Acetate (CH3COONa) in water and adjusting the volume to 500 mL. The pka for Acetic Acid (CH3COOH) is 4.75. 2.) Should 0.010 moles of
asked by Always 
math
Determine the value of k for which the direction vectors of the lines x1/k = y2/2 = z+1/k1 and x+3/2 = z/1, y=1 are perpendicular.
asked by Tina 
MAT201 Basic Statistics
A dealership sold 15 cars last month. The purchase price of the cars, rounded to the nearest thousand, is represented in the table Purchase Price/# of cars sold $15,000
asked by Pat 
chemistry physics
A car is traveling toward you at 40.0 mi/h. The car horn produces a sound at a frequency of 480 Hz. What frequency do you hear? Assume that the sound velocity in air is 1090 ft/s. Do I need to convert ft/s to m/s?
asked by Ben 
physics
How much power is developed by a jumbo jet that cruises at 250 m/s. When the trust of its engine is 100,000N?
asked by yena 
MATH!!
Joe and Susan invested $1500 at Bank of America in 2000, at 4% compounded quarterly. In the year 2005 they moved to another city and took the total money from their investment added $500 and invested in at Bank Bravo, at 5% compounded quarterly. a) What is
asked by Anna 
history/engllishthesis
I need help writing a thesis for my history day project, my person is Sacagawea and this years theme is leaders and their short and long term legacies. I don't exactly know where to start. Sacagawea has played a big role in the discovery of Louisisana
asked by Anonymous 
OChem
Write the structural formula of a compound with an unbranched chain of five carbon atoms that is an alkenoic acid.
asked by Laura 
MATH!
Barbara invested $12,300 at the Midtown Credit Union at 6% compounded monthly for 7 years. What is the effective rate of this investment?
asked by Anna 
Chemistry 211
Which of the following statements is a reasonable explanation for why a percent yield may be less than 100% for the synthesis of the alum, select all that apply. a) The aluminium foil did not completely react b) Some alum sample remained in the beaker and
asked by Joe 
INTSCIENCE
The earth can be considered a heat engine because it receives heat from the sun and converts it into mechanical energy to produce winds and evaporate water. True False
asked by Casey 
physics
A weightlifter has a basal metabolic rate of 64.6 W. As he is working out, his metabolic rate increases by about 650 W. (a) How many hours does it take him to work off a 450 Calorie bagel if he stays in bed all day? (b) How long does it take him if he's
asked by Maria 
Chemistry
Provide the name(s) for the branched constitutional isomer(s) with the molecular formula C7H16 that have three methyl groups.
asked by James 
Math
Given TriangleABC with a = 9, b = 15, and m
asked by Anonymous 
physic 2210
A pulley (a soild disk) with mass 2kg and radius 0.3 m is attached by massless rope to two blocks of masses m1=1kg and m2=3 kg. what is the acceleration of block 1 after the system is realeased from rest?
asked by john roylance 
pt1420
if the expression is false, the_____ operator will return true.
asked by joe 
liberal arts
A turtle is at the bottom of a 13 foot well. Each day it crawls up 5 feet, but each night it slips back 3 feet. After how many days will the turtle reach the top of the well?
asked by valerie 
social studies
When France gave up control of Vietnam in 1954, which group gained control of North Vietnam and which group took charge of South Vietnam? 1 Cambodian forces gained control of North Vietnam and Laotian forces took charge of South Vietnam 2 Communist forces
asked by Lelo 
Math
Given TriangleABC with a = 9, b = 15, and m
asked by Anonymous 
eng
which one of the following fragments is a prepositional phrase
asked by eddie 
MATH
Janet dreams to go on vacation in three years. How much should she invest now so that she will have $15,000 by that time if the account earns 1 3/8% compounded quarterly?
asked by Billy 
physics
An airplane of mass 1.30 104 kg is moving at 52.0 m/s. The pilot then increases the engine's thrust to 7.00 104 N. The resistive force exerted by air on the airplane has a magnitude of 3.00 104 N.
asked by kc 
Math
As a savings plan for college, when their son Bill was born, the Johnson's deposited $10,000 in an account paying 4% compounded quarterly. How much is this account when Bill is 18 years old?
asked by Anonymous 
math
The ratio of boys to girls on the bus is 20/15
asked by melvin 
c++
#include #include using namespace std; string getClientDatabase(); int main() { string data = getClientDatabase(); // TODO: // Implement a function that parses clients data into proper containers // Implement a function that finds the youngest client //
asked by meryem 
government
three types of political party systems and how they affect governing
asked by anonymous 
Chemistry
What is the concentration of sodium phosphate contains 0.60 M Na+? I'm not sure what to do and how to figure how to do this question.
asked by Emily White 
int.science
The earth can be considered a heat engine because it receives heat from the sun and converts it into mechanical energy to produce winds and evaporate water. True False
asked by Casey 
physics
A disk with mass m = 5.2 kg and radius R = 0.44 m hangs from a rope attached to the ceiling. The disk spins on its axis at a distance r = 1.59 m from the rope and at a frequency f = 18.6 rev/s (with a direction shown by the arrow). 1. What is the magnitude
asked by stewart 
Math
Determine the linear velocity of an object with an angular velocity of 8.1 radians per second at a distance of 10 centimeters from the center. Use pi. Round the answer to the nearest tenth. I got 47, is this correct?
asked by Anonymous 
algebra
Perform the indicated operation y/y5+5/5y
asked by steven 
accounting
On October 10, 2010, Mason Engineering Company completed negotiations on a contract for the purchase of new equipment. Under the terms of the agreement, the equipment may be purchased now or Mason may wait until January 10, 2011, to make the purchase. The
asked by Anonymous 
calculus
(i know i've asked so many questions. i just want to make sure my answers are right for this homework! hopefully it isn't too annoying for you :) ) Find the derivative of the given function. y=(tan^1)√(3x) A. (1)/(√(13x)) B. (1)/(6√(3x(1+3x))) C.
asked by kailey 
c++
You have been tasked to implement a program that manipulates a list of clients’ information. The client information consists of client’s phone number, first name, last name, and age. The list is not sorted in any particular order. Furthermore, you are
asked by meryem 
math problem (please help)
What are the dimensions of a rectangular tract of land if its perimeter is 70 kilometers and its area is 300 square kilometers? km (smaller value) akm (larger value)
asked by angie 
Spanish
What is a bodegón? What is its significance?
asked by Anonymous 
Algebra math Question
Find the dimensions of the rectangle meeting the specified conditions. The perimeter is 20.4 millimeters and the length is 2.4 times the width. (Round your answers to one decimal place.) width mm length mm
asked by LIYAH 
math physics
What frequency is heard by an observer who hears the 450 Hz siren on a police car traveling at 35 m/s away from her? Assume that the velocity of sound in air is 345 m/s. Is this the correct? 450*345/(345+35) =408Hz
asked by Ben 
ratios and proportional relationships
if a tiger eat food that weights up to 15% of its body weight and it eats 75 pounds of food how much does the tiger weigh
asked by Anonymous 
calculus
Me again. One last question! Again, just needed my answer verified with any explanation or walkthrough. The position of a particle moving along a coordinate line is s=√(3+6t) with s in meters and t in seconds. find the particle's acceleration at t=1
asked by kailey 
physics
Elephants communicate via infrasound, at frequencies as low as 14 Hz that can travel up to 10 km. The intensity of these sounds can reach 103 dB, measured a distance of 5.0 m from the source. Determine the intensity level of the infrasound 10 km from the
asked by May 
Chemistry
A sample of lithium sulfate, Li2SO4, contains 6.78 x 10^23 formula units. a) How many moles of Li+ ions are there in the sample? b) How many moles of ions are there in the sample? My work. I think a) is 2.26 is that correct?
asked by Secila 
Astronomy
Does the probability that a singleplanet system shows transits increase, decrease or stay the same if the planet has a rather small or a rather large semimajor axis?
asked by g 
College Physics
(a) How many hours does it take him to work off a 450 Calorie bagel if he stays in bed all day? (b) How long does it take him if he's working out? 2 h (c) Calculate the amount of mechanical work necessary to lift a 126 kg barbell 2.10 m. 3 J (d) He drops
asked by Maria 
physics
Question: Object A is moving at a maximum speed of 6m/s towards Object B. At 50 m away Object B accelerates from the approaching Object A at 0.3m/s^2. Does Object A catch up to Object B and if yes when? I don't know how to answer this at all or even which
asked by sam 
Microbiology
2 ml of stock antibiotic (64 mg/ml) was diluted into a test tube containing 2 ml of broth (final volume is 4). A series of 2fold SERIAL DILUTIONS were performed by transferring 2 ml to three other tubes, consecutively (final volumes now 2 ml in each
asked by Anonymous 
Math 3371
In a certain year, 26% of all teenagers in the United States had checking accounts. Your bank, TeenChex Inc., is interested in targeting teenagers who do not already have a checking account. (a) If TeenChex selects a random sample of 3,000 teenagers, what
asked by John 
American history
I have to answer these questions: 5. Compare the viewpoints of the senators in the Versailles Treaty. 6. What was the final outcome of the Treaty of Versailles for the United States? 7. How was the map of Europe and the Middle East transformed as a result
asked by Morgan 
Math Physics
What is the wavelength of an electromagnetic wave with frequency 50.0 MHz? Am I starting this problem like this? 3.00*10^8/50*10^6 =6*10^12
asked by Ben 
Spanish 1 question
How are lunch traditions changing in the Spanishspeaking world, and why?
asked by Anonymous 
Social Studies Grade 6
What are the definition for rural decline, spatial inequality, standard of living, and urbanization. Please help me! Thank you a sixth grader Susie
asked by Susie 
Social Studies Grade 6
Here are the instructions!(: Copy a symbol or an illustration to represent each item. Write a definition of each term in your own words. Write a sentence that includes the term and the words Mexico City. Thank you!(:
asked by Susie 
statistics
your medical terminology instructor listed the following grades for the class out of a 75point: 33,34,43,45,45,54,59,60,62,64,66,67,68, 67,68,68,69,70,70
asked by Anonymous 
Algebra math Question
Find the dimensions of the rectangle meeting the specified conditions. The perimeter is 352 feet and the length is 4 1/2 times the width. width ft length ft
asked by LIYAH 
Math
Probability Question: A college student claims that she can identify 3 different types of cheese by taste. An experiment is set up to test her ability. She is blindfolded and given three pieces of cheeses, each representing a different brand. What is the
asked by `Emma 
Math with business apps
You invest $5000 at 3% compounded monthly for 15 years. How much interest will you earn?
asked by Jenna 
science
what cause sea floor spreading
asked by Ally83410 
Calculus
9)Evaluate the indefinite integral. ∫x^8e^(x^9)dx
asked by Hailey 
physics
A thin rod (uniform density & thickness) has mass M and length L. It is attached to the floor at a fixed location by a frictionless hinge. The rod start at rest, balanced vertically on its hinge end. ______________________________________ 1) While
asked by wes 
Chemistry
What is the pressure in a 22.1L cylinder filled with 16.3g of oxygen gas at a temperature of 329K?
asked by Trina Wash 
English
I just went to buy some groceries to cook supper when I come home to see my beloved husband on the floor. I was shocked and horrified to even think what happened. Can someone check if my grammar, punctuation is alright? Also can someone help me to make my
asked by Thi. 
Astronomy
Given the random orientation of planetary orbits relative to our line of sight, do you expect most or only a minority of all planetary systems to show transits?
asked by g 
physics
on the surface of planet y, which has a mass of 4.38 x10^24 kg, an object has a weight of 50.0 N and a mass of 30.0 kg. What is the radius of this planet?
asked by Anonymous 
Chemistry Homework Help
d 25 ml of 0.15 M HCL solution be added to 250 mL of buffer solution containing 0.25M HF Ka7.1 x 10, and 0.40 M NaF at a pH of 3.15 what is the new pH?
asked by Always 
now mr. damon, physics
A 63.8 kg block of silver is at initially at 107 C. 1.0 kg of ice at its freezing point is placed onto the block to cool it. As the ice melts, the water is free to flow off (so that the water never increases in temperature). After all the ice melts, what
asked by sara 
Chemistry
If 35.0 mL of 0.210 M HCl reacts with excess Mg, how many mL of hydrogen gas are produced at STP? Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) Is the answer 0.8176 L Convert moles of HCl: 2.10 x 0.035= 0.00735 mol of HCl Convert to moles of H2: 0.0735 x 1 mol
asked by Mike 
Chemistry
A sample of lithium sulfate, Li2SO4, contains 6.78 x 10^23 formula units a) How many moles of Li+ ions are there in the sample b) How many moles of ions are there in the sample
asked by Mimi 
physics
calculate minimum effort required to move load of 39 Newton in inclined plane whose length of slope is 39m ,height is 5m, distance from the base is 12m?
asked by TG 
Physics
A 250kg box is pushed horizontally with a force of 750 Newtons. If the coefficient of friction is 0.25, calculate the net acceleration of the crate. I am confused how I am to find the net acceleration. I solved to find FN and FG is 2452 N is that correct
asked by rina 
physics
A ball player hits a home run, and the baseball just clears a wall 17.6 m high located 122.0 m from home plate. The ball is hit an an angle of 35° to the horizontal, and air resistance is negligible. Assume the ball is hit at a height of 1.1 m above the
asked by JAck 
English
1. It is not far from here. 2. It takes three hours from here to the station by car.  Does "it" in each sentence have the same function? Does the "two it's" have the same grammatical role?
asked by rfvv 
math
Jane had $7 and her sister had $2. Their parents gave each of them an equal amount of money. Then, Jane had twice as much money as her sister. How much money did their parents give each of them
asked by Anonymous 
program design
Create the logic for a program that continuously prompts a user for a numeric value until the user enters 0. The application passes the value in turn to a method that computes the sum of all the whole numbers from 1 up to and including the entered number.
asked by michelle bartels 
statistics
In a correlation study, we seek to determine; *if the IV cause an outcome in the DV. *Which variable is the cause and which variable is the effect. *The direction of causation. *How well one variable predicts another variable.
asked by erica 
chem/science
A piece of an aluminum can was cut into small pieces. Then 0.422 g of the chips from the can was used to prepare potassium alum according to the procedure we used. Calculate the theoretical yield (in g) of potassium alum that could be obtained in the
asked by Caroline 
Pre algebra
My problem says The cost of a cell phone for one month is a linear function of the numbers of minutes used. The total cost for 20, 35, and 40 additional numbers Re shown. Then it gives a table where it's 20/48$, 35/54$ and 40/56$ The first question is ,
asked by Alyssa 
Chemistry
A sample of lithium sulfate, LiSO4, contains 6.78 x 10^23 formula units. a) How many moles of Li+ ions are there in the sample? b) How many moles of ions are there in the sample? My work: I think a) is 2.26 moles And b i am not sure
asked by Mimi 
Spanish
May I get my biographic essay of Pablo Neruda proofread? I need to see if it actually makes sense and all my verb tenses are correct. Pablo Neruda es un poeta chileno famoso. Ricardo Eliecer Neftalí Reyes Basoalto Neruda nacío en 1904. Su madre murió
asked by Trinh 
Chemistry
How do I balance CuSO4 + NH3 + H2O = (NH4)2SO4 + Cu(NH3)4(OH)2 Thank you!!!
asked by Sally 
chemistry
I just need a definitive answer because I've searched everywhere and it's made me second guess my original answer. How many valence electrons does copper have? I thought it was one but now I'm unsure. I know it's electron configuration is [Ar]4s1 3d10, so
asked by Sierra 
science
how many moles of oxygen gas are necessary to form 0.737 moles of carbon dioxide
asked by Jennifer 
Chemistry
Calculate the S(univ) for the following phase change at 25 deg celcius. The boiling point of heptane is 98.0 Celcius and has a Delta Hvap= +21.6kj/mol. C7H16(l)> C7H16(g) Delta S= +79.0j/k I know that the equation is Delta Suniv= DSsys + DSsurr PLEASE
asked by Jared 
trig
solve each equation if 0 < x < 2pi. answer must be in radians 1. 4 cos x  2 = 0 2. 3 sec^2  4 = 0
asked by jason 
statistics
from the following list of numbers of discharges each day in september, compute the mean, mode, and range.
asked by Anonymous 
Physics
The speed of a transverse wave on a string is 18 m/s when the tension is 3.0 N. What tension is required for the wave speed along the string to be 19 m/s? Answer in Newtons.
asked by Misaki 
math calculus
if i,j,k are the standard unit basic vectors, in 3 space, determine the value of k dot(j3k)+(i4k) dot (i4k)8 i cross k (Simplify without using components)
asked by Tina 
Question
What four songs can I select to explain the heritage and the popular culture of the United States? Or lead me in the direction of understanding moe into what the heritage and popular culture is
asked by Mindy 
Uniform Motion
A certain fish requires 3 hrs to swim 15km downstream. The return trip upstream takes 5 hrs. What is the speed of the fish still in water? How fast is the current of the stream?
asked by Gela 
physics
A 63.8 kg block of silver is at initially at 107 C. 1.0 kg of ice at its freezing point is placed onto the block to cool it. As the ice melts, the water is free to flow off (so that the water never increases in temperature). After all the ice melts, what
asked by sara 
math
A cone is made from the figure shown by joining the straight edges and securing them with tape, calculate the angle of inclination, to the nearest tenth of a degree, for the side of the cone.
asked by Anonymous 
Chem please help
What does the second law of thermodynamics say about entropy? A. Only changes in entropy can be measured. B. The entropy in a system is zero at equilibrium. C. The entropy in a system and its surroundings tends to increase. D. Entropy cannot be created or
asked by Morgan 
algebra
mrs scott bought some silk at $29.50 a yard and had $12 dollars left. if she had bought twice as much silk at $19.75 cent a yard she would have need $28 more to pay for it. how many yards did she buy and how much money had she
asked by caleb 
physics
calculate the number of kilocalories needed to climb 232 stair steps (116 steps per minute for 2 min.) climbing stairs (116/min.) = energy consumption rate is 9.8 (kcal/min)
asked by rochelle dataro 
Algebra
A small software company invests $30,000 to produce a software package that will sell for $64.95. Each unit can be produced for $42.25. (Round your answers to the nearest whole number.)
asked by ada 
algebra
give the slop of each line and then determine whether two lines are parallel, perpendicular, or neither parallel nor perpendicular. 2x+5y=5, 4x+10y=0
asked by Chandresh 
English
What are the steps to make a good essay?
asked by Jannine 
Science
2 ml of stock antibiotic (64 mg/ml) was diluted into a test tube containing 2 ml of broth (final volume is 4). A series of 2fold SERIAL DILUTIONS were performed by transferring 2 ml to three other tubes, consecutively (final volumes now 2 ml in each
asked by Anonymous 
calculus
hello! i just needed help to verify or falsify my answer and any explanation as to why would be extremely helpful! thanks ahead of time. y=(x^2)6x+10 a. at x=3 b. at x=0 c. at x=1 d. at x=3 my answer was D. thanks again!
asked by kailey 
math,trigonometry
a 35foot long ladder is leaninig against the wall of a building. how far from the ground is the top of the ladder and how far from the base of the buildings is its foot if it makes a 20° angle with the wall ?
asked by Goldamier 
Math with business apps
How much should be invested at 6% compounded monthly so that the investment will be worth $20,000 in six years?
asked by Jenna 
Health 2
Gonorrhea is spread through ________. A. semen, !@#$%^&l fluid and kissing B. semen and !@#$%^&l fluid C. semen, !@#$%^&l fluid, and sharing cups D. semen, !@#$%^&l fluid, kissing and sharing cups B?
asked by Austin 
Calculus
10) Evaluate the integral by making the given substitution. ∫sec(5x)tan(5x)dx u=5x
asked by Hailey 
Calculus
11) Find the following indefinite integrals. ∫x/(x+9)^(1/2)dx
asked by Hailey 
math
A and B together can make a wall in 60 days. A has worked for 12 days, B finishes the remaining work in 36days. How many days will B take to finish the whole work alone?
asked by sanjana singhania 
physics
it takes about 560 kilowatts to run a diesel locomotive at speed around 180km/h.Magnetically levitated trains(mag levs) on the other hand require less power because the magnetic levitation eliminates energy loss to friction.The worst maglev system requires
asked by Anonymous 
Primary Sources Search Help
I'm looking for primary sources from when Sacagawea was alive that relate to her in some way Otherwise any tips for finding primary sources?
asked by Anonymous 
calculus
A) Determine the vector equation of the plane that contains the following two lines: l1: vector r= [4,3,5] + t[2,0,3], tER l2: vector r= [4,3,5] + s[5,1,1], sER b)Determine the corresponding Cartesian equation.
asked by Sarah 
U.S. History
which of the following was not a weakness of the articles of confederation (17811789)? A) a week "league of friendship" among the states B) the requirement of unanimous approval by all 13 states for amendments C) no judicial branch D) no congressional
asked by Sara 
Chemistry
A sample of toluene, C7H8 has a mass of 74.5 g. a) how many molecules does the sample contain? b) How many carbon atoms does it contain? How many hydrogen atoms does it contain? My work For b would it be 7 carbon atoms and 8 hydrogen atoms
asked by chemistry 
physics
is it possible to a have a percentage difference of zero in physics
asked by Anonymous 
Algebra
y=2/3+2;(9,3) and y=1/4*2;(8,1) what are the steps in solving this equation and what does it mean for on line to be perpendicular or another?
asked by joann 
math
change the following mixed numbers to a fraction in the forma/b were a and b are integers 3 5/6 ?
asked by Emily 
chemistry
What mass of AuCl3 contains 160.9 g of gold? My work i got 104.6 g is that correct
asked by Sammy 
Physics
A 4.40kg block hangs from a spring with spring constant 2160N/m . The block is pulled down 4.60cm from the equilibrium position and given an initial velocity of 1.40m/s back toward equilibrium. A) What is the frequency of the motion? B) What is the
asked by Dib 
physics
Calculate the radius of a “super Earth” with 10 times the mass of Earth, using Earth data as a starting point.
asked by dale 
Math
You invest $5,000 at 3% monthly for 15 years. How much interest will you earn?
asked by Billy 
Chemistry
A sample of toluene, C7H8 has a mass of 74.5 g. How many carbon atoms does it contain? How many hydrogen atoms does it contain? My work: I get 3.41 x 10^24 for carbon atoms And 3.90 x 10^24 for hydrogen atoms. Is this correct?
asked by Joyce 
English
What is an example of morbidity in "The Fall Of the House of Usher" by Edgar Allan Poe ? I know what morbidity is but it's hard finding an example in the story so can you please help me find an example of it.
asked by Jessica 
MATH
{56.0/25}+1100=
asked by Lakshmi 
Chemistry Physics
What is the wavelength of an electromagnetic wave with frequency 50.0 MHz? Am I starting this problem like this? 3.00*10^8/50*10^6 =6*10^12
asked by Ben 
English
My teammates and___ practice every day after classes are over. a.I b.me c.my d.us I am think a ___ said in our orientation that we much make our decisions about how we are going to make a difference. A.It B.Our Leader C. They D. Them I am think B ____of my
asked by Anonymous 
Chemistry Physics
What is the wavelength in metres of an electromagnetic wave with a frequency of 10^14/s?
asked by Ben 
Problem Solving
the average giant pacific octopus weighs about 75 pounds. the largest octopus ever found weighed 8 times this amount. how much did the largest octopus weigh
asked by hassan 
PreCalc/Trig
is the integer n odd or even, explain
asked by Anonymous 
algebra 2
Can u please help me on this question.Simplify 1.) √a/b×√a^2/b^2
asked by Janet 
math!!
mike and sam begin saving money at the same time. mike plans to save $3 a month and sam plans to save $8 a month. After how many months will sam have $25 more than mike?
asked by Emily 
physics
Two sounds have measured intensities of I1 = 102 W/m2 and I2 = 408.00 W/m2. By how many decibels is the level of sound 1 lower than that of sound 2? Answer in dB
asked by May 
Astronomy
How do astronomers know whether they are seeing planets or stars when they are distant?
asked by Ben 
Math Physics
What is the wavelength in metres of an electromagnetic wave with a frequency of 10^14/s?
asked by Ben 
Math
A worker uses 4gray tiles for every 5blue tile That he uses .if he uses 60gray tiles how many blue tiles does he use
asked by Anonymous 
math
369/{(0.24*5)+(0.66*5)}
asked by Lakshmi 
Physics
A guitar string has a mass of 30g and length of 2m. Find the tension if its density is 0.2kg/m^3
asked by Kiki 
physics, please help
A 63.8 kg block of silver is at initially at 107 C. 1.0 kg of ice at its freezing point is placed onto the block to cool it. As the ice melts, the water is free to flow off (so that the water never increases in temperature). After all the ice melts, what
asked by sara 
Chemistry
Should 25 ml of 0.15 M HCL solution be added to 250 mL of buffer solution containing 0.25M HF Ka7.1 x 10, and 0.40 M NaF at a pH of 3.15 what is the new pH?
asked by Always 
math
the find the volume of a pyramid that has a slant height of 176cm and a square base with area 9.00m
asked by jeet 
physics (would mr. sue or mrs damen answer my ques
A 63.8 kg block of silver is at initially at 107 C. 1.0 kg of ice at its freezing point is placed onto the block to cool it. As the ice melts, the water is free to flow off (so that the water never increases in temperature). After all the ice melts, what
asked by sara 
algebra
Soybean meal is 14% protein, cornmeal is 7% protein. how many pound of each should be mixed together in order to get 280lb mixture that is 13% protein?
asked by Chandresh 
Math
Find the volume of a right circular cone with base diameter 12.0 m and slant height is 10.0m . Round to the nearest whole
asked by Jeet 
math
A letter is chosen at random from the word EXTRATERRESTRIAL. Find the probability of the given event. (a) The letter A is chosen.
asked by deen 
Math
Student budgeted a $25 a month for phone service. If the telephone company charges $18 a month for basic service and $.05 a minute for each long distance call, how many minutes can be spent on long distance calls each month?
asked by Spencer 
poetry ! help
I'm confused on how to write a sonnet poem. ( I searched for some examples but there just way to confusing) any examples? Thanks:)
asked by mark 
Math
chris cuts half a rectangular lawn, 40m by 30m, by mowing strips of equal width around the perimeter. Jerri cuts the small rectangle left. How wide a stripe does Chris cut so they share the work equally
asked by Annie 
math
a car traveling 8 m/s suddenly brakes to a complete stop. THe stopping time was .36 seconds. what is the acceleration of the car?
asked by Hailey 
math
Ron has $1.35 in dimes and quarters in his pocket. If there are twice as many dimes in his pocket as quarters, how many quarters does he have?
asked by hassan 
Essay Excerpt Edit
Can someone edit this? Please be forewarned that its a first draft so I am aware that it is not developed yet. Any feedback would help a lot. Clearly, Jason Russell's Kony 2012 campaign proves how YouTube has altered our understanding of creativity from
asked by christine 
math
Ron has $1.35 in dimes and quarters in his pocket. If there are twice how many quarters does he have?
asked by hassan 
Physics
A ball is thrown horizontally with a velocity of 40 m/s from the top of a building. Find its velocity and displacement after 3 s.
asked by Jan 
Earth Science
Describe the difference in evolution between a supercell that develops in an environment with unidirectional wind shear and a supercell that develops in an environment with veering winds. What is causing this difference in evolution? THANKS!!
asked by Sarah 
math
if the perimeter of an equilateral is 24 inches find a side of the triangular
asked by lovez 
math
Carina has twice as many quarters as dimes. If she has $3.60, how many quarters does she have?
asked by hassan 
English
Choose the statement which is not suitable for the passage above? 1. "I" didn't have breakfast. 2. "I" usually get up late. 3........ 4......... 5........  Why is the quotation mark is used as in "I"? What is the role of the
asked by rfvv 
engineering
haw calculat the deflated trisection
asked by bassel 
Chemistry
2 ml of stock antibiotic (64 mg/ml) was diluted into a test tube containing 2 ml of broth (final volume is 4). A series of 2fold SERIAL DILUTIONS were performed by transferring 2 ml to three other tubes, consecutively (final volumes now 2 ml in each
asked by Anonymous 
calculus
hello! i just needed help to verify or falsify my answer and any explanation as to why would be extremely helpful! thanks ahead of time. y=(x^2)6x+10 a. at x=3 b. at x=0 c. at x=1 d. at x=3 my answer was D. thanks again!
asked by kailey 
physics /astronomy
If a system has multiple planets all in the exact same orbital plane, does the transit of one planet imply that all planets in the system must transit as well?
asked by karen 
caculus
Evaluate the indefinite integral. ∫(arcsinx)^6/(1−x^2)^(1/2)dx
asked by Hailey 
Calculus
2) If f(x)=∫t^2dt on the interval from 4 to x^3 then f′(x)=?
asked by Hailey 
Math Help!
What percent of 50 is 15? A. 4% B. 25% C. 30% D. 15% Is the answer C? Thank you
asked by Callie 
Calculus
4) On the integral from 1 to 2 ∫(4x^2+4)/x^2dx =?
asked by Hailey 
grammar
Which is a similie? A) riding like the wind or B) looked like they had come from far
asked by Anonymous 
Calculus
5) Evaluate the definite integral. On the integral from 1 to e^7 ∫dx/x(1+lnx)=?
asked by Hailey 
English
Can someone please explain what "cultivating a winning personality" means? Thank you :D
asked by Nicole 
Math Help!
30% of 60 is what number? A. 15 B. 30 C. 18 D. 40 Is the answer C? Thank you
asked by Callie 
data
I am looking for the school report each year regarding school violence and vandalism? I can not find this information on the internet, can you help me? Missouri school report.
asked by sam 
chemistrynaming
How do I name the following C3H8? (the numbers are supposed to be subscripts) KCl?
asked by Anonymous 
Social studies
How does elevation affect settlement distrubations
asked by Jazzy 
Social studies
How does temperature affect settlement distribution?
asked by Jazzy 
Calculus
6) Evaluate the indefinite integral. ∫cosx/(7sinx+35)dx
asked by Hailey 
math
On a highway, lighting poles are 50m apart. How many lighting poles will be passed by a bus that is moving at a speed of 45kmph in 4 hours.
asked by sanjana singhania 
Chemistry
In 250 mL of a 0.35 M solution of NaOH, there are how many grams of NaOH?
asked by Hannah 
math
The speeds of two trains A and B are in the ratio of 5:6. A takes 36 minutes more than B to reach the destination.what is the time taken by A to reach the destination to cover the same distance?
asked by sanjana singhania 
Algebra
A small software company invests $30,000 to produce a software package that will sell for $64.95. Each unit can be produced for $42.25. (Round your answers to the nearest whole number.) (a) How many units must be sold to break even? units (b) How many
asked by ada 
PreCalc/Trig
Help me please, I don't understand this write using exponential notation √ 36* 3√ 64 oh and 3 is an exponent
asked by Anonymous 
Calculus
What does y'' mean in calculus? Is there a word for it? Also is there a word for f'(x)? Thanks.
asked by anonymous 
PLEASE HELP CHEMISTRY
What mass of pure silver would you obtain from 85.0 g of AgNO3? I got 53.55 g is that correct?
asked by Mike 
algebra
someone know about adding and subtracting denominator
asked by steven 
chemistry
0.195 m of ca oh 2 solution to neutralize 750 ML of a 0.235 m of hno3 and balance it
asked by Anonymous 
physics
we did a lab and my observation chart is like this when my mass is 1.4 kgs (height is 0.12m,distance is 1.0m,time is 0.87s,velocity is 1.1 m/s ,Eg is 1.6 and the Ek is 0.85) when my mass is 2.14 kgs(height is 0.12m,distance is 1.0m,time is 0.88s,velocity
asked by chris 
Math
Factor 2y^4+y^210y+5 Please help!thank you
asked by Cherie 
Algebra
find the domain and range of y=f(x) {4 if 6
asked by Kayla 
physics
A harmonic wave is traveling along a string. If the oscillator that generates the wave completes 23 vibrations in 18.50 seconds and if it takes a crest 20.21 seconds to travel 168 cm along the rope. What is the wavelength of the wave? Answer in cm.
asked by Serena 
math
arrange in order smallest to largest 0.8315, 0.75 ,0.7024 is this right 0.75 0.7024 0.8315
asked by Emily 
Physics
In our physics class we launched a rocket up into the air. We measured the time it took to go up to the point it reached the ground once again. How do I find the maximum height the rocket reached?
asked by Angela