Questions Asked on
April 9, 2012

chemistry
Find the pH during the titration of a 20.00mL of 0.1000 M butanoic acid, CH3CH2CH2COOH (Ka=1.54 x10^5), with the addition of 10 mL of 0.1000 M NaOH solution??
asked by anonymous 
physics
An 8.00kg package in a mailsorting room slides 2.00 m down a chute that is inclined at 53.0 degrees below the horizontal. The coefficient of kinetic friction between the package and the chute's surface is 0.400. Calculate the work done on the package by
asked by Amisha 
math
You are paid $8.55/hr at your parttime job. You work 10 hours per week. You are considering working a parttime job for $6.25/hr, and it pays tips. You will earn an average of $3.00/hr in tips. If you work the same 10 hours at the new job, how much more
asked by Cindy 
Math
The quantity demanded each month of russo Espresso Makers is 250 when the unit price is $140; the quantity demanded each month is 1000 when th e unit price is $110. the suppliers will market 750 expresso makers if the unit price is $60 or higher. At a unit
asked by Terri 
Precalc
An investment firm has a job opening with a salary o $30,000 for the first year. Suppose that during the next 39 years, there is a 5% raise each year. Find the total compensation over the 40year period.
asked by Maya 
Chemistry(Please check)
. Ksp for Fe(IO3)3 is 1014. Two solutions, one being iron(III) nitrate and the other being sodium iodate, were mixed. At the instant of mixing, [Fe3+] = 104M and [IO3] = 105M. What happens? My answer is that a precipitate forms because Qsp > Ksp. Would
asked by Hannah 
chemistry
Which of the following measures thermal energy in an object? (Points : 4) temperature mass heat volume
asked by melissa 
Chemistry
Calculate the solubility of cadmium sulfide, CdS, in mol/L, given the Ksp value as 8.0 x 10^27.
asked by Anonymous 
math
please help! You are paid $7.45/hr at your parttime job. Your deductions are FICA (7.65%), federal tax withholding (10.65%), and state tax withholding (5.7%). Your travel expenses are $5.70 per day worked. You work 12 hours over a 3day period of time.
asked by Cindy 
Pre Cal
An airplane leaves an airport and flies due west 150 miles and then 230 miles in the direction S 39.67 degrees W. How far is the plane from the airport at this time to the nearest mile.
asked by Kara 
Physics Need Help PLEASE
Two point charges are separated by 8 cm. The attractive force between them is 14 N. If the two charges attracting each other have equal magnitude, what is the magnitude of each charge?
asked by Jake 
physics
A 55.0 g ice cube, initially at 0°C, is dropped into a Styrofoam cup containing 318 g of water, initially at 18.2°C. What is the final temperature of the water, if no heat is transferred to the Styrofoam or the surroundings?
asked by JOHN 
Chemistry
What NaCl concentration results when 209 mL of an 0.660 M NaCl solution is mixed with 492 mL of a 0.270 M NaCl solution? __ mol/.209 L = 0.660 M __ mol/.492 L = 0.270 M .. I have no idea how to solve this. I have no idea why I even set up the equation
asked by Katherine 
geometry
Find the volume of a rectangular prism whose dimensions are twice those of another rectangular prism that has a volume of 120 cm3
asked by bianca 
physics
The sun is 1.5 1011 m from the earth. (a) Over what surface area is solar radiation spread at this distance? (b) What is the total power radiated by the sun? (The sun delivers energy to the surface of the earth at a rate of approximately 1400 W/m2.) (c)
asked by JOHN 
AlgebraII
A bag contains 5 pictures of Paris and 7 pictures of London. Determine whether the events of selecting the picture of London and another picture of London with replacement is independent or dependent. Then identify the indicated probability.
asked by A 
Statistics
Suppose that the scores of architects on a particular creativity test are normally distributed. Using a normal curve table, what percentage of architects have Z scores (a) above .10, (b) below .10, (c) above .20, (d) below .20, (e) above 1.10, (f) below
asked by Michael 
chemistry
What is the molar solubility of lead(II) chromate (ksp=1.8x10^14) in 0.13 M potassium chromate?
asked by Anonymous 
Consumer math
When Greg was born, his grandmother put $5000 in a savings account for his college expenses. It was compounded at 2.5 percent semiannually, and left in the account 18 years. How much was in the account? Round to the nearest dollar.
asked by Cosumer math 
Physics
In a hydraulic lift, the radii of the pistons are 2.93 cm and 10.1 cm. A car weighing W = 11.0 kN is to be lifted by the force of the large piston. (a) What force Fa must be applied to the small piston? N (b) When the small piston is pushed in by 10.4 cm,
asked by Akbar 
Chemistry
Need help with AP chemistry, specifically Acids and Bases The acid ionization constant, Ka, for propanoic acid, C2H5COOH, is 1.3 10 5 . (a) Write the expression for the aciddissociation constant, Ka for propanoic acid. (b) Calculate the hydrogen ion
asked by Sam 
Chemistry
SO this is my first time doing this... lol i need help on an AP chemistry question for equilibrium. A 0.500 L tank contains 3.00 g of NO(g) at 750. K. The equilibrium constant for the reaction below at this temperature is 3.4 x 10 3 2NO(g) ⇌ N2(g) +
asked by Sam 
science
a wolf is chasing a rabbit. Use the following data to graph the wolf's motion 15 m/s at 0s, 10 m/s at 1s, 5 m/s at 2s, 2.5 m/s at 3s, 1 m/s at 2s, 2.5 m/s at 3s, 1 m/s at 4s, and 0 m/s at 5 s. What does the graph tell you?
asked by oliva 
Calculus
If m ≤ f(x) ≤ M for a ≤ x ≤ b, where m is the absolute minimum and M is the absolute maximum of f on the interval [a, b], then m(b − a) ≤ b f(x) dx a≤ M(b − a). Use this property to estimate the value of the integral. The integral from 0 to
asked by Michael 
Pre Cal
Two tracking stations are on the equator 158 miles apart. A weather balloon is located on a bearing of N 41degrees E from the western station and on a bearing of N 21degrees E from the eastern station. How far is the balloon from the western station.
asked by Kara 
Chemistry Acids and Buffers
Cyanic Acid is a weak acid HOCN + H2O H3O+ +OCN ka= 3.5*10^4 a) if 2.5ml of 0.01 M cyanic acid solution is added to 25.0 ml of a formis acid buffer with ph = 3.70, what is the ratio of [OCN]/[HOCN] in the resulting solution? b) determine the pH of a
asked by Tasneem 
HELP PLEASE PHYSICS!!
How much does it cost to operate a 100 W lamp continuously for 1 week if the power utility rate is 8/kWh? answer in $
asked by Jake 
physics
.Two automobiles are equipped with the same singlefrequency horn. When one is at rest and the other is moving toward an observer at 14 m/s, a beat frequency of 5.1 Hz is heard. What is the frequency the horns emit? Assume T = 20°C.
asked by Anonymous 
Chemistry
A reaction yields 3.75 L of nitrogen monoxide. The Volume is measured at 19 *C and a pressure of 1.10 atm. What mass of NO was produced by the reaction?
asked by CHEMMY 
Physics
A bullet mass 10 g strikes a log with a mass of 25 g suspended from a 3 meter long string. The bullet lodges in the log which swings up through an angle of 30 degrees. Find the speed of the bullet just before it hit the log.
asked by Mary 
math
A container in the shape of a right circular cylinder with no top has surface area 3*pi (m2). What height h and base radius r will maximize the volume of the cylinder ?
asked by febie 
College Physics
A 1.70 kg object attached to a spring moves without friction and is driven by an external force given by F = (3.00 N) sin(2πt). (a) If the force constant of the spring is 20.0 N/m, determine the period. _____s For this one I tried 2*pi*sqrt(1.7/20) but it
asked by Anand 
Economics
Introduction to Economics: Explain why scarcity and choice are basic problems of economics?
asked by Anonymous 
scientist
What is biomass energy? the chemical energy stored in living things the electromagnetic energy stored in living things the nuclear energy stored in living things the thermal energy stored in living things Not sure what this one could be
asked by kevin 
chemisry.Electrochemical Measurement of Concentrat
A calibration curve to show how the cell potential varies with [Cu2+] may be constructed. A plot of cell potential (in V, with the same sense as in question 1) versus log10[Cu2+] should yield a straight line. What is the slope of this line? The answer
asked by Mahtab 
environmental; science
describe three or more of the six major ways in which humans use land.
asked by Anonymous 
calculus
Suppose $5000 is deposited in a bank account that compounds interest four times per year. The bank account contains $9900 after 13 years. What is the annual interest rate for this bank account?
asked by Zoey 
physics
A pot containing 1.09 liter of water, initially at 18°C, is placed on a 1101 W electric heating element. (a) How much heat must be supplied to the water to bring it to a boil? (b) How much heat is necessary to boil all the water away? What is the minimum
asked by JOHN 
Physics (12th Grade)
In a certain process 500 cal of heat is given to a system and the system does 100J of work. What will be the increase in internal energy of the system?
asked by Tulika 
chemistry
The rusting of iron is represented by the equation 4Fe + 3O2 2Fe2O3. If you have a 1.75mol sample of iron, how many moles of Fe2O3 will there be after the iron has rusted completely?
asked by gwen 
Physics (12th Grade)
Equal volumes of monoatomic and diatomic gases of same initial temperature and pressure are mixed.What will be the ratio of sprcific heats of the mixture(Cp/Cv)?
asked by Tulika 
Physics (12th Grade)
In changing the state of a system from state A to state B adiabatically the work done on the system is 322 J. If 100 cal f heat are given to the system in bringing it from state A to state B, then what will be the work done on the system in this process?
asked by Tulika 
Chemistry 2
The bottle of bleach lists the percentage of sodium hypochlorite as 6.0%. If the density of commercial bleach is 1.084 g/mL, how many mL of .150 M sodium thiosulfate is required to reach the endpoint in a titration if a student analyzed a 2.0 mL sample of
asked by Anonymous 
Physics
Elle is pushing a box of mass 7.0 kilograms with the force of 25 newtons. If the force of friction is 2.6 newtons, what is the value of acceleration of the box?
asked by Moises 
Chemistry
what is the molar solubility of lead(II) chromate (ksp=1.8x10^14) in 0.13 M potassium chromate?
asked by Anonymous 
Economics
Introduction to Economics: Explain why scarcity and choice are basic problems of economics?
asked by Anonymous 
handling and restraintanimals
I need help on this 1 question i have my answer, i just need to know whats the right answer.... The least desirable method of restraint for a cat is a.holding the cat while wearing heavy gloves. b.holding the cat with your bare hands. c.placing the cat in
asked by s. 
Math
10e^(3x7)= 5 So what I've done is rewritten it as: (3x7)ln10e = ln5 Now I'm a little lost as to what to do next...
asked by D.S. 
Chemistry
Need help in AP chemistry on Equilibrium When heated, hydrogen sulfide gas decomposes according to the equation 2 H2S(g) ⇄ 2 H2(g) + S2(g) A 3.40 g sample of H2S(g) is introduced into an evacuated rigid 1.25 L container. The sealed container is heated to
asked by Sam 
Physics (12th Grade)
The isothermal bulk modulus of elasticity of a gas is 1.5 * 100000 N/m^2. What will be its adiabatic bulk modulus of elasticity? Given the ratio of Cp/Cv=1.4
asked by Tools 
Statistics
I'm going over some practice problems and I can't seem to figure this one out. Can anybody give me some help please? On a measure of artistic ability, the mean for college students in New Zealand is 150 and the standard deviation is 25. Give the Z scores
asked by Michael 
PLEASE HELP!!!!! (Right Triangle Question)
Point N is on hypotenuse BC of triangle ABC such than angle CAN is 45 degrees. If AC=8 and AB=6, find AN. I did Pythagorean Theorem for triangle ABC, and hypotenuse BC will be 10. I don't know how to continue from there. Oh, I'm also unsure about this, but
asked by My Name Is Bob 
phys chem
Calculate the Coulomb potential due to the nuclei at a point in a LiH molecule located 200 pm from the Li nucleus and 150 pm from the H nucleus. just doing exam review and got stuck on just this one, be great if I could get an answer.
asked by harry 
physics
(a) How much heat is required to raise by 12.40°C the temperature of 1.4 kg of water. (b) How much heat is required to raise by 12.40°C the temperature of 1.4 kg of iron.
asked by JOHN 
6th GMath
1.What is a reasonable estimate for the area of a circle with radius 4 cm? A. Area=12cm^2 B. Area=16cm^2 C. Area=24cm^2 D. Area=48cm^2
asked by Lauren 
Chemistry(Please help)
For an acetic acidsodium acetate buffer to have a pH of 4.64, what molar ratio of CH3COOH to Na+ CH3COO– is needed? I know that the Ka value for acetic acid is 1.8e5 and that I have to divide this value by the value of sodium acetate but I do not
asked by Hannah 
chemistry
Bill prepared 5.00mL of borax solution at 59.2degrees C. He diluted the solution in an Erlenmeyer flask and titrated it to an endpoint with 27.05 mL of 0.500 M HCl. What is the saturation concentration of borate ions? I don't know what to do here. Does it
asked by jason 
Finite Math
The quantity demanded each month of russo Espresso Makers is 250 when the unit price is $140; the quantity demanded each month is 1000 when th e unit price is $110. the suppliers will market 750 expresso makers if the unit price is $60 or higher. At a unit
asked by Terri 
Physics (12th Grade)
When an ideal diatomic gas is heated at constant pressure then what fraction of heat given is used to increase internal energy of gas?
asked by Tulika 
English
Here are some more sentences on history I'd like you to check. 1) In particular, he wanted to defend his own interests by nominating the bishops. 2) First, he made his best friend, Thomas Becket, Archbishop of Canterbury,the chief bishop in England.
asked by Matthew 
scientist
Solar cells convert what type of energy into electrical energy? chemical electromagnetic nuclear thermal Can someone please help I believe thermal
asked by kevin 
chemistry
What is the mass percent of oxygen in sodium bicarbonate (NaHCOÀ)?
asked by Anonymous 
maths
calculate the 16th term of an arithmatic progression he its fifth term is 6 and its 12th is 41.
asked by mafika 
math 11
Calculate the interest due on the following credit card balances. a)An unpaid balance of $1623.53 at a rate of 19.50% for 21 days. b)An unpaid balance of 2639.99 at a rate of 22.95% for 30 days.
asked by krystal 
calculus
A colony of bacteria is growing exponentially, increasing in size from 200 to 500 cells in 100 minutes will it take the colony to double in size?
asked by patty 
physics
In a hydraulic lift, the radii of the pistons are 2.93 cm and 10.1 cm. A car weighing W = 11.0 kN is to be lifted by the force of the large piston. (a) What force Fa must be applied to the small piston? 925.7 N (b) When the small piston is pushed in by
asked by Akbar 
Science
Demarcus wants his friend, Alvin, to guess which planet he is describing. He tells Alvin that the planet is rocky and doesn't have any moons. What other clue would let Alvin be certain which planet Demarcus is describing? A)It has rings around it. B)It is
asked by Bella help please 
physics
What is the momentum of a twoparticle sys tem composed of a 1300 kg car moving east at 100 m/s and a second 1300 kg car mov ing west at 35 m/s? Let east be the positive direction. Answer in units of kg · m/s
asked by Julie 
chemistry
If 3.5 ml of distilled water is added to 1.5 ml of a 0.150M solution of CoCl2 what is the concentration of the resulting solution? please show the work
asked by Tonya 
Chemistry
Titanium (6.94x10^19) and silicon (7.77x10^19) surfaces as irradiated with UV radiation with a wavelength of 231 nm. what is the wavelength of the electrons emitted by the titration surface?
asked by Tiffany 
Chemistry
Hemoglobin, an oxygencarrying protein in blood, contains 4 iron atoms per molecule and the iron comprises 0.34% of the molecules mass. What is the molecular weight of hemoglobin? Thanks!
asked by Mike 
computer buinesss
List the two websites and write a paragraph for each on why you find this digital content interesting.
asked by F/aith 
Chemistry PLZ HELP!!!!!
describe what happens to sulphur as it is heated from room temperature to about 250 degrees c mention the various allotropes encountered.
asked by Maci 
physics
A wagon is used to help deliver papers. There is a force applied at an angle of 25 degrees to the horizontal that causes the wagon to move a distance of 15m[N] in 10.0s from rest. There is a force of friction of 3.1 N acting on the 27kg wagon. What is the
asked by Melissa 
physics
A down jacket has a surface area of 0.82 m2 and is filled with a 3.8 cm thick layer of down, which has a thermal conductivity of 6.0 106 kcal/(s · m · C°). The coat is worn by a person whose skin temperature is maintained at 27° C. The outer surface
asked by JOHN 
Help with evalutation
Evaluate. 3^8a^10b^5c^2/3^12a^7b^3c^2 a=4, b= 8 c=3
asked by chelsea 
English
I still have to add a few sentences on history. Thank you very much. 1) War with France broke out in 1337 when Edward III claimed the crown of France because his mother was the French king's sister. This was the beginning of the Hundred Years' War, which
asked by Matthew 
chementropy
a glassblower heats glass (the system) to its softening temperature. Is the entrophy change of the system is positive or negative?
asked by Brynn 
physics
A horizontal water main with a crosssectional area of 206 cm2 necks down to a pipe of area 42.4 cm2. Meters mounted in the flow on each side of the transition coupling show a change in gauge pressure of 71.0 kPa. Determine the flow rate through the
asked by katie 
Thermodynamics
Suppose an enzyme lowers the activation energy by an order of magnitude. What is the ratio of catalyzed rate to the uncatalyzed rate at at 25 °C? at 37 °C?
asked by Ali 
(aig)math(Ms.Sue)
a string 28 yards long is cut into 10 equal pieces.what is the length of each piece?write your answer as a fraction and as a decimal.
asked by lidia 
Physics (12th Grade)
An air bubble of volume 15 cc is formed at a depth of 50 m in a lake. If the temperature of the bubble while rising remains constant then what will be the volume of the bubble at the surface?(Given: g=10 m/s2 & atm. pressure = 1.0 * 100000 Pa) * Physics 
asked by Tulika 
Math
Figure out a persons BMI with the formula B= 703w/h^2
asked by Yvette 
scientist
Pretend you are a scientist and you just found a solid substance in the ground where you were digging. What types of tests would you do on this substance? How would you determine if it is a rock or a mineral? Describe your substance (yes you can make
asked by Bell 
English
What would be some problems a modern day Thoreau would find in today's society?
asked by Anonymous 
physics
an isolated quantity of an ideal gas at 297.2 K has a volume of 14.96 L at a pressure of 1.63 atm. What is the volume of this gas sample when the absolute temperature is reduced to one third and the pressure is divided by five?
asked by katie 
Physics
If you drop an object, its acceleration toward the ground is 10.0 m/s^2. If you throw it down instead, is its acceleration after throwing greater than 10.0 m/^2 ? Why or why not?
asked by Anonymous 
chemistry/ stioichiometry
Cu2S + O2 2Cu +SO2 when 10.2 mol Cu2S react with oxygen, how many moles of Cu are formed? path?
asked by rachell 
math
Suppose $5000 is deposited in a bank account that compounds interest four times per year. The bank account contains $9900 after 13 years. What is the annual interest rate for this bank account? i already set it up but i don't know where to go from there.
asked by Please help! 
World History
What was the only thing that united East & West Pakistan? Time period:  Decolonization in India and Africa, 10th grade history
asked by Jasmine 
math 11
Calculate the amount of interest earned in 10 years on $1000 invested at 3.00% per annum, compunded annually?
asked by krystal 
chemistry
3Ag(s) + 4HNO3(AQ) = 3AGNO3(aq) + NO(g) + 2h2o(l) How many moles of NO can be produced by the reaction of 54.0g of Ag show me the step please
asked by jhong 
Finance
Jungle, Inc. has a target debtequity ratio of 0.72. Its WACC is 11.5 percent and the tax rate is 34 percent. What is the cost of equity if the aftertax cost of debt is 5.5 percent?
asked by Sarah 
Physics
the wind blows with a force of 425N north on a sail boat, while the water exerts a force of 325N west on the sailboat. Find the magnitude and direction of the net external force on the sailboat.
asked by tom 
life orientation
Identify and describe one environmental problem that causes ill health,accidents,crises,and disasters within your community or any other community witin south Africa or globaLly
asked by shenese 
Math 11
An investment earning simple interest at a rate of 1.10% per annum for a term of 5 years earned $82.50 in interest. What was the principal?
asked by Chuck 
physics
What is the momentum of a twoparticle sys tem composed of a 1300 kg car moving east at 100 m/s and a second 1300 kg car mov ing west at 35 m/s? Let east be the positive direction. Answer in units of kg · m/s
asked by Julie 
physical
if a person exerts 250n force to lift a 1250n object using a simple machine, what is the mecahnical advantage of the machine
asked by Anonymous 
math
The Downtown Theater has 1 ticket window. In how many ways can 3 people line up to buy tickets?
asked by Cheril 
Pre Cal
cos 75 deg
asked by Kara 
Calculus
Two automobiles are traveling on intersecting roads. The first automobile is traveling northeast at 35 km/h. The second automobile begins 7 km north of the first, and it is traveling east at 25 km/h. Assuming that these cars will continue at this rate,
asked by Angio 
algebra
Jane spent 62% of her school budgets on books. In degrees what measurement would would that section be on a circle graph
asked by Aby 
Physics
A pool ball initially traveling 5 m/s strikes a second pool ball of identical mass in a totally elastic collision. After the collision the first ball has veered off its original path and is now traveling at 3 m/s. Find the speed and angle of each pool ball
asked by Mary 
p
A roller coater has a first drop of 140 meters and then enters a circular loop. Find the maximum radius of the loop such that the coaster never leaves the track at the top of the loop. Using the radius found in part 1, calculate the largest centripetal
asked by Mary 
business
Revise sentence for better understanding/communication 1.Business has an inordinate influence on governmental operations. 2. Our expectaions are that there will be increasement in commodity value. 3. Can we assertain the types of customers that have a
asked by Lisa 
Chemistry
A 10.00 g sample of He is compressed isothermally from a volume of 61.1 L to a volume 2.00 L at a temperature of 25 °C. Calculate the work done by the gas on the surroundings if the external pressure is 101.325 kPa.
asked by sol 
calculus
A curve passes through the point (1,11) and it's gradient at any point is ax^2 + b, where a and b are constants. The tangent to the curve at the point (2,16) is parallel to the xaxis. Find i) the values of a and b ii) the equation of the curve
asked by Amponsah 
algebra
Using the formula for BMI: B = 703(w)/ h² When the weight is 100 lbs and the BMI is 20, how do I figure out the persons height?
asked by Kelly 
Chemistry(Please check answers)
1)What is the pH of a saturated solution of lead(II) hydroxide? The Ksp= 4.0e15 Pb(OH)2 4.0e15 = (x)(2x)^2 = 4x^3 I divided by 4 and took the cube root and got 1.12e5 but I am not sure I took the cube root correctly. log(1.12e5)= 4.95 144.95 = 9.05
asked by Hannah 
Reading
Rebecca wondered if the type of papre used to make a paper airplane would affect the distance the plane flew.She hypothesized that an airplane made of light weight paper would fly farther than an airplane made of heavier paper.Rebecca made 5 airplanes.They
asked by Rezu 
world history
What was the cause of the peloponnesian war ? A.greeks sought revenge for the persian wars B.Sparta wanted control of the powerful athenian army C.A spartan murdered the athernian ruler pericles D.Many grees outside of athens resented athenian domination.
asked by ciara 
Algebra 2
what is the opposite of 49x^2y A. 49x^2y b. 49x^2y c. 1/49x^2y d. 49/x^2y
asked by chels 
Chemistry
What will happen to the room temperature if the refrigerator door is kept open?
asked by Tulika 
physics
Plz 2mrow is a dubmition day.on how gravitational acceleration is used to benefit mankind and environment.how can rural people also benefit from the use of gravitational acceleration
asked by tronic 
Penn Foster
Would you please help me with these two questions on which i am not sure of my answers.? I marked my answers with a parenthesis. On the second question I can not make up my mind between c & d. Thank you for any assistance you can provide. waiting for your
asked by Esmeralda 
Simple Interest
The Johnsons have saved $45,000. They invest their money in a bank and thei account earns 7.5% interest. How many years will it take to earn $74,000? *PLEASE PROVIDE AN EXPLANATION*
asked by Marilyn 
Circuits
I have to calculate the voltage across the resistor of an rlc circuit where the 4.7nF capacitor is in parallel with the .200 H inductor for different frequencies (starting with 1000 Hz) They appear at the top of the circuit and they both looked to be in
asked by Heather 
Math 11
Calculate the final value after 10 years if you invest 5000.0 at 2.5% per annum compunded annually?
asked by krystal 
Chemistry PLZ HELP!!!!!
what are the names of three important nitrogen fertilizers with their formulas?
asked by Maci 
Math 1330
In a survey of 1000 eligible voters selected at random, it was found that 200 had a college degree. Additionally, it was found that 90% of those who had a college degree voted in the last presidential election, whereas 47% of the people who did not have a
asked by Ashleigh 
world history
Why were the European nations able to carve Africa up for themselves ? Can you give me some hints to be able to answer this question please? thank you
asked by joseph 
Math
Beth need enough ribbon to go around the perimeter of her blanket. If the blanket measures 45 inches by 60 inches, how many inches of ribbon will beth need to buy?
asked by Ronasia Mcbride 
Math
Paul's car can have wheel's ranging from 1824 inches radius. He has the option of getting a wheel with the diameter of 2 and half feet, 3 and half feet, or 4 and half feet. What size wheel should he purchase? Explain?
asked by Ronasia Mcbride 
Calculus
Explain the possible relationships between two lines in R^3
asked by Jenny 
Science
A spacecraft of mass 500kg lands on the moon. Calculate the moon's gravitational pull on it given that mass of the moon is 7.5 x 10^22kg and radius of the moon is 1.6 x 10^6m.
asked by Amponsah 
Finance 370
A bond that has a $1000 par value (face value) and a contract or coupon interest rate of 11.5. The bonds have a current value of $1120 and will mature in ten years. The firm's marginal tax rate is 34%. Using the time value of money, calculate the yield to
asked by joel 
SS7R
The 2nd amendment is the right of the people to keep and bear arms. A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed It gives private citizens the right to own
asked by Laruen 
Math
Factor over {complex numbers} 9x^2 + 49
asked by Nathan 
Math
I don't remember sampling methods... i do know that there are three and one of them is litteraly called 'random'. if i can please be reminded of the methods i can finish the last 3 problems of my math.... i don't like math especially if you have a field
asked by Iva 
trig
solve the equation of the domain 0¡Ü¦È¡Ü2¦Ð 3cos^2theta  5costheta 1 = 3sin^2theta
asked by Amanda 
social studies
what used to be celebrated before april fools day
asked by Celest 
Science
How many conformations does monosodium glutamate (MSG) have and why?
asked by Dany 
algebra
Kayla Wants To write an Expression that will always produce an odd integer. Which of the Following will always produce an odd integer for any given integer ?
asked by josie 
Chemistry(Please help)
If you add 0.35grams NaF to 150mL of a 0.30M HF, what is the pH of the resulting solution? To start off would I use the value of 1.4e11 for F^^ and 7.2e4 for HF?
asked by Hannah 
Interest
In 6 years, Jim wants to have $47,230 to buy a new car. (a) How much must Jim save each month if the interest rate is 6% compounded monthly? $ ______ (b) How much of the $47,230 does Jim actually deposit and how much of it is interest? $______(deposit)
asked by F0reveryoung 
Pre Cal
tan 2x tan 6y/ 1+ tan 2x tan 6y
asked by Kara 
(aig)math(Ms.Sue)
twelve pails of the same size were used to fill a tank with water.the capacity of the tank was 42 gallons.find the capacity of each pail.hive your answers in gallons and quarts.
asked by lidia 
Geometry
Find the center of the circle using the equation provided. Please show work! x^2 + y^2 = 16
asked by Megan 
Math
IN a square with each side measuring 6inches what is the ratio of the perimeter to the area? Please show work for this!!
asked by Alyssa 
Physics
A monoatomic gas expands isobarically.What will be the percentage of heat supplied that increases the thermal energy and that involved in doing work for expansion?
asked by Tulika 
math
A colony of bacteria is growing exponentially, increasing in size from 200 to 500 cells in 100 minutes will it take the colony to double in size?
asked by Patty 
English
Can you please check these sentences on history? Thank you, Writeacher. 1) Richard was succeeded by his younger brother John I, called Lacklan because he lost Normandy and most of his French territories. 2) He levied higher taxes an his policy (of heavy
asked by Matthew 
Chemistry PLZ HELP!!!!!
though both nitrogen and oxygen are diatomic gases, nitrogen is far less reactive than oxygen. Why?
asked by Maci 
Geometry
Find the measure of the acute angle that the given line forms with a horizontal line. 1. Y=5x+3 2. Y=1/2x+4
asked by T.A 
math
The mean of a set of 51 data points is 3.04. If a data value of 16 were added to the data set, what would be the approximate value of the new mean?
asked by Nicole 
biology
What part of the brain controls sleep and how does it work. I am looking for a easy to understand answer because when i have searched i do not understand it.
asked by Sara 
Science
Which of the following is not a variable in an investigation designed "how much light is needed for a spider plant to grow?" A.type of plant B.amount of water C.source of light D.amount of light B? Which of the following is the best investigation question?
asked by Rezu 
Discreate Math
Suppose that a department contains 13 men and 19 women. How many ways are there to form a committee with 6 members if it must have strictly more women than men
asked by Carlton 
physics
How much energy expressed in units of food Calories (that is, kilocalories) is required to operate a 100 W light bulb for 14.70 hours?
asked by JOHN 
Calculus and vectors
Verify please and thank you~ 1. Does the line (x7)/3=(y+8)/6=(z+4)/5 and the point P(10,2,1) determine a plane? Answer: Yes, it is a plane because when I substituted the point P(10,2,1) into the equation, I got the coordinates (1,1,1) If the coordinate
asked by Antia 
Physics
A large solid cylinder rolls without slipping down a 40 m long hill with a 30 degree slope. The cylinder then rolls a short distance over level ground and then off a 20 meter high sheer cliff. How far from the base of the cliff does the cylinder land?
asked by Mary 
calculus
Let f be the function given by: f(x)=1/5x^5/2+x^1/2, for all x in [1,4]. Find the length of the graph of f.
asked by AJ 
Algebra 2
Find the slope of the line containing these points. (1/8, 1/4) and (3/4, 1/2)
asked by Nancy 
Calculus
Which value of k will make the plane r=(k,3k,12) +s(2,2,3)+t(1,1,3), s,teR passing through the origin? a) 2 b) 1 c)0 d) 1
asked by Jenny 
English
Writeacher, I hope you can help me clarify the following sentences. I can't understand the relation between the knights and the barons. 1) Henry II was successful in bringing 3)order and stability. To avoid civil wars, he needed to reduce the power of the
asked by Matthew 
chemistry
You have a 1 L container of a gas O 2 at 20°C and 1 atm. Subtracting the weight of the container, what is the mass of the gas?
asked by sam 
history
What is the origin of the fortune cookie? What are the words on the piece of paper inside the fortune cookie?
asked by rfvv 
Chemistry
A saturated solution of a certain metal(II) chloride has a chloride ion concentration of 0.032M. The Ksp for this compound can be determined to be is? This is similar to another question I posted that gave the Ksp and I had to find the pH. I am not sure
asked by Hannah 
Life orientation
define unfairractice or unethical practice of sportmen or homen and discuss 6 examples.
asked by tronicph 
Science
Which of the following is not a variable in an investigation designed "how much light is needed for a spider plant to grow?" A.type of plant B.amount of water C.source of light D.amount of light B? Which of the following is the best investigation question?
asked by Rezu 
math
What is the mode of the scores for Game 3? _____ Team  Bowling Scores Member  Game 1  Game 2  Game 3 Bob  92  118  105 Craig  127  101  96 Kim  131  128  122 Nancy  127  109  115 Phillip 113  109  122 what is the mode in math again? and
asked by Cheril 
physics
A horizontal segment of pipe tapers from a cross sectional area of 50 cm2 to 0.5 cm2. The pressure at the larger end of the pipe is 1.26 105 Pa and the speed is 0.029 m/s. What is the pressure at the narrow end of the segment? Pa Please help!
asked by Malika 
World History
Three reasons why Japan closed its doors to the outside world
asked by Katajh 
Math
Find the particular equation of the cubic function that contains (2,35), (1,7), (2,9), and (3,25)
asked by Bobby 
chemistry/ stioichiometry
Cu2S + O2 2Cu +SO2 when 10.2 mol Cu2S react with oxygen, how many moles of Cu are formed? path?
asked by rachell 
math
2 men ran 36 parts. X ran 5 times as many as Y. how many parts did Y run?
asked by matt 
7th grade math
How would you solve the problem below using subsitution method? 7x  2y = 5 x = y If you could explain and show this step by step, it would help a lot. How would you solve the problem below using combination method? 3x  2y = 12 3x + 8y = 6 If you could
asked by saranghae12 
math
There were 25 students who completed a survey. There were 11 boys and 14 girls. One survey was picked at random. To the nearest hundredth, what is the probability it was completed by a girl?
asked by mara 
math
5a + 2b is a a. monomial b. binomial c. trinomial what is a monomial? binomial? trinomial?
asked by Cheril 
chemistry
A student tipped the watch glass and spilled the solution containing organic component X. Use the data given below to estimate the percent of organic solid X in the sample. Mass of sample 0.6084g Mass of water soluble component, Y 0.1565g Mass of insoluble
asked by Vanilla 
Algebra 2
Use the associative property of multiplication to write an expression equivalent to 8x*(4y*7z)
asked by chels 
math
(5x2 + 9) + (7x2 + 8) = _____?
asked by Cheril 
ALGEBRA
(a) Simplify the expression. 3(x  2)  9(x**2 + 7 x + 4)  5(x + 8) (a) Simplify the expression.
asked by Daniel 
Human Relations
I'd would like to learn about how Pope John Paul II was a good leader. This is what I've written so far: Pope John Paul II was a man who represented the Roman Catholic Church very well with his charity work and dedication to his faith.
asked by Alex L. 
accounting
In order for companies to prepare and issue financial statements, their accounting equations (debits and credits) must be in balance at year end. Discuss how errors and misstatements may occur given this requirement. Bookkeeping is largely done today using
asked by meka 
Science
How can rural people benefit from gravitational acceleration
asked by Candy 
Algrebra
I need to find the approximate surface area of a cone with the R=5 and L=6. I thought I figured it out by 3.14(5)(6) which will give me 94.2 I then would take 94.2 +3.14(5)squared and I came up with 172.7, but my answer should be either 20m squared, 98m
asked by Samantha 
math
13  8x = 5x + 2 x= 11/13?
asked by lauren 
Calculus
Which of the following is the xintercept of the plane 2x4z+1=0? a) P(2,0,4) b) P(0,0,0) c) P(1/2,0,0) d) P(0,0,1/4)
asked by Jenny 
please help!! algebra
systems of nonlinear equations i need to help i have tried this problem but i cannot find the right answer i need to determine the real solutions for this: x^2+4xy=10 4x^2xy=6
asked by ashley 
Science
How can rural people benefit from gravitational acceleration
asked by Candy 
MATH
JUST WOULD LIKE TO KNOW IF I DID THESE PROBLEMS RIGHT. THANKS IN ADVANCE Starting a Business Starting your own business can be exciting and daunting at the same time. Businesses use math when managing finances, determining production levels, designing
asked by MS. HERR 
English
1. Let's not rush it. (What does 'it' refer to? What other expressions can we use it instead of the sentence?) 2. Don't give up on your dreams. 3. Don't give up your dreams. (Are both grammatical?)
asked by rfvv 
English
Homework Help: history Posted by rfvv on Monday, April 9, 2012 at 8:18am. What is the origin of the fortune cookie? What are the words on the piece of paper inside the fortune cookie? history  Ms. Sue, Monday, April 9, 2012 at 12:17pm The words on the
asked by rfvv 
Social Studies 7R  Bill of Rights Project
I have a project for social studies that is due when we come back from break (4/16/12). Choose one of the projects listed below to show your understanding of one or more of the following Amendments 1, 2, 3, 4, 5, 6, 7, and 8 to the Constitution: I choose
asked by Laruen 
algebra
Jane spent 62% of her school budgets on books. In degrees what measurement would would that section be on a circle graph
asked by Aby 
Financial Math
Suppose that you decide to lease a car. At the end of the 48month lease period, you need to make a lumpsum payment of $5000 if you want to keep the car. You decide to save up, just in case you decide to keep the car; if you don’t keep this car, you
asked by John 
Chemistry
Calculate the volume of ovygen at STP collected at 25.0 L at 775 mm and 296 Kelvins. Yhe mercury level inside the tube is 28.0 mm higher than outside. Please help me solve, I am at a loss :(
asked by Gaby 
algebra
systems of nonlinear equations i need to help i have tried this problem but i cannot find the right answer i need to determine the real solutions for this: x^2+4xy=10 4x^2xy=6
asked by ashley 
Science
25 cm of 1.0 mol dm− NaOH is added to 25 cm of 1.0 mol dm− HCl. The temperature rise is 6¢XC. Which reactants will also give a temperature rise of 6¢XC? A. 25 cm of 2.0 mol dm− NaOH and 25 cm of 2.0 mol dm− HCl. B. 50 cm of 1.0 mol dm− NaOH and
asked by Lee 
Calculus and vectors
A plane, π, has 3x5z+3=0 as its Cartesian equation. Determine the Cartesian equation of a plane that is perpendicular to π and contains the point P(2,9,3)
asked by Anita 
algebra
So.....if Jane has a budget of$290. How do I explain how I would find the amount she spent on books. Plzzz help!!
asked by Aby 
Probability
A bag contains some balls of which 1/4 are red. Forty more balls of which 5 are red are added. If 1/5 of all the balls are red, how many balls was there originary?
asked by Amponsah 
Calculus
Evaluate the integral by interpreting it in terms of areas. The integral from 3 to 0 of 5+(9x^2)^1/2.
asked by Michael 
Chemisty Help!!!!!!!!
show how you would obtain (the orbitals used) and the possible types (the orbitals produced) for hybridization of a carbon atom. you must report the shape and the number of orbitals of each type used and produced for each type of hybridization.
asked by Amanda 
geometry
Find the height of a cone with a volume of 138 cubic meters and a base area of 46 square meters
asked by bianca 
geometry
Find the height of a cone with a volume of 138 cubic meters and a base area of 46 square meters
asked by bianca 
math
Suppose the cards shown are mixed and placed facedown. Think about drawing a card and without replacement drawing a second card. Give the probability in simplest form: P(A, B) = _____ ————— ————— ————— —————  A  
asked by Cheril 
math
You bought one $2 chance on an $84 radio. Sixty chances were sold. What is the probability of your winning the radio?
asked by Cheril 
math
You bought one $2 chance on an $84 radio. Sixty chances were sold. What is your expectation?
asked by Cheril 
Math
A bag of marbles contains 5 red, 12 blue and 5 yellow. What is the ratio of red marbles to non red marbles?
asked by Sarah 
Math
I'm having a hard time with this problem. The book tells you the answer is 5, but I don't know how they got there. log(x+25)= 1+ log(2x7)
asked by Karla 
Math
Hello, I need help to understand step by step of my math problem. I am not understanding how to get the answer. Thank You for your help Hope
asked by Hope 
Math
For an experiment on the titration of a supernatant liquid I need to calculate the number of moles of S2O3^2^ ion required using the volume of SrIO3 solution(supernatant liquid) from the two trials that were conducted. For both trials the volume of SrIO3
asked by Hannah 
math
in 2001 there were about 2,317,000 marriages in the United States. Ms.Sue, I know you want me to do this by myself and you would do the explaining. Ms.Sue here is one of the example problems from my study links.I don't get how they find the percentage. My
asked by Celest 
Physics
what is your power output if you climb a 2m ladder in 10 seconds? suppose your height is 565N.
asked by Chita_Cheee 
chemistry
help me find which reactant is the limiting reactant when 74 g NaOH and 44 g CO2 are allowed to react when the equation is (2NaOH+1CO2=Na2CO3+1H2O)
asked by corey 
AP Chemistry
Calculate the pH of a 75.0 ml solution containing 0.85 M lactic acid after the addition of 0.0225 moles NaL (assume a negligible volume change.)
asked by Davis 
Chemistry1
How do we find the molar mass of a gas produced? Example if 1.00 kg of N2H2 reacts with 1.00kg of H202. How many moles of N2 could be formed? THe equation is N2H2+2H202 > N2 + 4H20
asked by Hero 
Physics
If you drop an object, its acceleration toward the ground is 10.0 m/s^2. If you throw it down instead, is its acceleration after throwing greater than 10.0 m/^2 ? Why or why not?
asked by Anonymous 
to ms.sue
on your last post you said move two decimal places to the right.2 places to the right is 0.06 not 0.063
asked by Celest 
Math
Given P(x) = x^3  3x^2  5x + 10 a evaluate P9x) for each integer value of x from 3 through 5 b. Find all zeros of P(x) d. Prove that 5 is an upper bound on the zeros of P(x)
asked by Jason 
math
(2x +3) + (4x + 8) = What's the answer? and how to solve these problems?
asked by Cheril 
social studies
comparison between iraq and vietnam war
asked by Yellow 
Statistics
create a report with the following: the mean score for each question, the mean score for the entire test, a graph that represents the scores for each question. Evaluate the test by using the information in your report and conducting qualitative item
asked by Bee 
Language Arts
I have to write a 5 paragragh paper on what clean air means to me and my community. I have 2 done and I can't think of what to write about since the topic is so simple. Please help.
asked by Chocolate:) 
Life Orientation
Name institution/community organizations that are involved in supporting or giving redress to pollution ,explain how these organizations are involved in providing a safe and healthy enviroment
asked by Sherley 
geometry
Give an example of an infinite set.
asked by Megan 
to ms.sue
thank you so much . good thing you'r here.
asked by Celest 
social studies
can you help me write a introduction paragraph for the comparison between the iraq and vietnam war
asked by Yellow 
Algebra 2
24 more than the quotient of b and 2 is 8. Solve for b.
asked by chelsea 
History
Was the republican party consistent in its policies from the 1850s1877?
asked by Lala 
history
How was the civil rights movement of the 1950s and 1960s a continuation of the Reconstructionera struggle for blacks to achieve equality?
asked by Britt 
meaning
what is another definition for dandelion besides a type of flower. my teacher said there was another definition for it.
asked by Celest 
math
How do you turn four times the sum of five and a number into a variable expression?
asked by Victoria 
math
If the hourly sales at a certain register in a supermarket are normally distributed with a mean of $650 and a standard deviation of $60, find the probability that the sales during a randomly selected hour are greater than $800.
asked by Anonymous 
History
How were the issues of the civil war similar to those of the american revolution.
asked by Lala 
algebra
systems of nonlinear equations i need to help i have tried this problem but i cannot find the right answer i need to determine the real solutions for this: x^2+4xy=10 4x^2xy=6
asked by ashley 
Calculus
Which of the following planes is the equation for the pane with an xintercept at P(2,0,0), a yintercept at Q(0,3,0), and is parallel to the zaxis? a) 3x2y6=0 b) 2x3y+z6=0 c) 3y2z6=0 d) z=6
asked by Jenny 
linear alg
How to find the characteristic equation of this matrix? 4 5 2 3
asked by ?LL 
math
Find the exact values of sin 2theta, cos 2 theta and tan 2 theta when cot theta = 4/3
asked by Jim 
logic
Truth tables can (Points : 1) display all the possible truth values involved with a set of sentences. determine what scientific claims are true. determine if inductive arguments are strong. determine if inductive arguments are weak.
asked by yola 
Government
What restrictions on freedom of speech and freedom of the press are constitutionally permissible?
asked by Nicole 
math
what is a translation over a vertical line?
asked by tiana 
Spanish
i need help translating these sentences. only using the verb "estar" 1. My grandfather took my brother to the university. 2. My best friend is my work colleague. 3. It's my boyfriends necktie. 4. My female cat is in the garden. 5. My male cousin and I had
asked by Elizabeth 
to ms.sue
thank you again. you have the patients to teach me, a fourth grader. you also don't get tired of answering everyone's questions. you always have the courage to try. thank you so very much!
asked by Celest 
history
how did the cold war increase tension in the middle east?
asked by bkue 
Chemistry
Attn: Dr. Bob Thank you so much for your help on thisgreatly appreciated!
asked by B 
Physics(12th grade)
When the temperature of a gas in a vessel is increased by 1C then the pressure is increased by 0.5%. what will be its initial temperature?
asked by Tulika 
Civics
Could someone explain what the Dennis vs. United States trial 1951 was about? I'm having a little bit of trouble understanding it. I googled it, but I just need a brief summary that explains well (:
asked by CP 
Econ
Explain how a perfectly competitive market promotes productive efficiency (minimum average costs).
asked by Mike 
Engineering
What is the upper tripper point (UTP) of a comparator with hysteresis if R1 = 47 kÙ, R2 = 68 kÙ and the maximum positive output voltage is 10V?
asked by Robbie 
Art
Explain how Florence reflects the ideals of the dominant citystate and how some of the geographical, economical, social, and artistic forces shape this ideal
asked by Kim 
Chemistry PLZ HELP!!!!!
Differentiate between oxide, a peroxide, and a superoxide?
asked by Maci 
health
what are two important aspects of mental healt
asked by chey 
math
"write down a rule for finding the volume(v litres) remaining after h hours." I dOnt know how to do this.
asked by nihaal 
math
how do you draw a rectangle with a perimeter of 10 units?
asked by Anthony 
College Algebra
Annual profit in thousands of dollars is given by the function, P(x) = .1x^2 + 50x  300, where x is the number of items sold , x >= 0. 1.describe the meaning of the number .1 in the formula. 2.describe the meaning of the number 300 in the formula.
asked by John 
Calculus
If m ≤ f(x) ≤ M for a ≤ x ≤ b, where m is the absolute minimum and M is the absolute maximum of f on the interval [a, b], then m(b − a) ≤ b f(x) dx a≤ M(b − a). Use this property to estimate the value of the integral. The integral from 0 to
asked by Michael 
Titanic
Was the movie Titanic based on a true story?
asked by Laruen 
Chemistry PLZ HELP!!!!!
give five uses of phosphorus either as the acid or as one of its salts.
asked by Maci 
Chemisty Help
for each of the molecules below, show the dipole you would expect. you must show the direction of the dipole  arrow head pointing toward the negative end. 1) CF4 2) CH3Cl
asked by Jessica 
maths functions
given points A(1,0) B(3,0) C(0,3) T(1,4) and D(2,5) on F find the equation of F in three different ways
asked by siphokazi 
art history
how did monasticism and feudalism differ? give two examples
asked by anna 
Physics pls help
At what depth in water is the pressure equal to 2m atmosphere. Explain how
asked by Momito 
science
a 150g of a metal at 80degree C is placed in 100cm3 of pure water at 20degree C. the final temperature of the system (metal+water) is 23degree C. what is the specific heat of the metal? i got the ans 0.16 by using formula mCdelta T(water)=mCdeltaT(metal)
asked by asra 
hca/210
examples of position in healthcare for the four functions of management
asked by anne 
Chemistry
How many stereoisomers are possible for threonine?
asked by Meenaakshi 
historty
who was lowell mill strikers
asked by nathalie 
physics
on how gravitational acceleration is used to benefit mankind and the environment.how can rural people also benefit from the use of gravitational acceleration
asked by tronicph 
math
You bought one $2 chance on an $84 radio. Sixty chances were sold. Was buying a chance a "good deal"?
asked by Cheril 
MATHEMATICS
How do you find the average deviation from these numbers: 290 , 270 , 250 , 300 , & 290. I think their mean is 280
asked by DAN 
French
What is the difference between the efficiency of appliances in the US vs. France and the amount of power used? thanks
asked by rebekah 
math
What is the mean of the scores for Bob? _____ Team  Bowling Scores Member  Game 1  Game 2  Game 3 Bob  92  118  105 Craig  127  101  96 Kim  131  128  122 Nancy  127  109  115 Phillip 113  109  122 what is mean in math again?
asked by Cheril 
life orientation
one environmental problem that causes ill health, accidents, crises, and disasters within south africa.
asked by thandekile 
math
Solve and simplify (3+9i)(125i) 8+6i/75i
asked by Kyle 
Physics
a foam boulder has a mass of 2kg and a velocity of 20m/s. a stone boulder has the same velocity (20m/s) but a mass of 20kg. which of the two has more momentum? Explain.
asked by Chita_Cheee 
7th grade math
How would you solve the problem below using the subsitution method? 12x + 4 = 8y y = x  7 Please explain to me and help. If you could show all the steps, that would help a lot. Thank you.
asked by saranghae12 
physics
a toy car is accelerating across the floor at 6.0m/s^2 and a force of 10N is creating the motion. what is the mass of the car?
asked by Chita_Cheee 
math
If each inch is equal to 3 feet, what is the area of a rectangular rug with a length of 3 inches and a width of 2 inches?
asked by rose 
math
joe is putting fence all aroung four sides of a rectangulr flower bed it is 6 feet wide and 4 feet long each section of the fence is 2 feet long how many sections of fencing will joe need
asked by ghjggk 
to ms.sue
I still don't get it. do we divide every # by 2. why do we need to move 2 decimal spaces?
asked by Celest 
Household appliances
Do you guys know of any websites that talk about the efficienty of household appliances and how it has changed over the years? Thanks
asked by rebekah 
Math
write the particular equation of a quartic function that could, according to Descartes Rule of Signs have four positive zeros.
asked by Emily 
Chemistry
Disulfide bonds in protein: a) results from an oxidation of thiol b)help to maintain the shape of proteins c)can be broken by reduction d)all of the above I know the option a) is correct,but I'm confused between options b)& c) as the informations on those
asked by Meenaakshi 
Chemistry
Calculate ∆Hºf /mol for propane, C3H8(g), given the following reaction: (10 points) C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(ℓ ); ∆Hºrxn = 2219.9 kJ
asked by Ruth 
physics
A house with its own well has a pump in the basement with an output pipe of inner radius 6.4 mm. Assume that the pump can maintain a gauge pressure of 420 kPa in the output pipe. A showerhead on the second floor (7.5 m above the pump's output pipe) has 38
asked by Angelina 
life orientation
one environmental problem that causes illhealth,crises,accidents and disasters within south africa
asked by Anonymous 
Data mangement
Mark selects one card randomly from a standard deck of cards. What is the probability that he will select either an even number or a heart?
asked by Nixon 
Algebra 2
Find (gº f)(4) f(x)=x^2+4 g(x)=2x
asked by Nancy 
Religion
What are some things that Tevye struggles with in the movie "Fiddler on the Roof"?
asked by Rebecca 
Data mangement
Hugo has a job interview at Telus. He has a 56% of waking up late on the morning of the interview. When he wakes up late he has a 33% chance of missing his bus to take him to the interview. At this rate he will be late and he has a 27% chance of actually
asked by Nixon 
Circuits
How do I design a low pass filter for an Fc = 4000 Hz and a high pass filter for Fc =2000 Hz?
asked by Heather 
algebra 1
3/5g+4=6 1/3
asked by sheirce 
Chemistry PLZ HELP!!!!!
a. describe the frasch processfor mining sulfur. b. why must the water be superheated?
asked by Maci 
geometry
Find the geometric mean each pair of numbers. If nessary, give the answer in simplest radical form. 5 and 8
asked by Jane 
algebra
add if possible simplify the expression (8x^3y^2+5x^2y^2+6xy^2)+(4x^3y^23xy^2)
asked by miss c 
geography
calculate the freeboard of a 10m thick iceberg in saltwater (seawater density of 1025 kg/ m^3)
asked by Jackson 
chemistry
Write an equilibrium reaction for a buffer system made of the weak base, B, and its conjugate acid. If the buffer contains 1.05 M of B and 0.750M conjugate acid and has a pH of 9.50, what is the pH after 0.0050 mol HCl is added to 0.500 L of this solution?
asked by meme 
Chemistry
Arrange these acids in terms of increasing acidity: CH3COOH, NH3+CH2COOH, CH3CONHCH2COOH My answer is CH3COOH,CH3CONHCH2COOH,NH3+CH2COOH . Is this correct Dr.Bob?
asked by Meenaakshi 
History
Which of the events (CPR, NWMP, Pacific Scandal, Dominion Land Act) was most important in influencing settlers to move to Western Canada?
asked by Susan