
probability
a teacher on her way to work passes through 3 stoplights each morning. the distances between the stop lights are great and the lights operate independently of each other. if the probability of the red lights are .4,.8 and .6 for each light, what is the
asked by Lindsey on February 25, 2014 
physics
for both of these object system1: earth and ball if a ball is falling down, is the work done on it positive since force and displacement are in the same direction. system 2: earth and basket a basket is tied to a rope and is dropped then come to a full
asked by eng on May 25, 2010 
calculus
Eight and onehalf footpounds of work is required to compress a spring 3 inches from its natural length. Find the work required to compress the spring an additional onehalf inch. (Round your answer to two decimal places.)
asked by fgm on January 25, 2012 
Math
Find the sum of each series by using appropriate formulas. Show your work. MY WORK: (N is the last number in the sequence) 1+2+3+...+230 n(n+1)/(1*2) 4+8+12+...+360 n(n+4)/)4*2) 1+3+5+...+123 ((n+1)/2))^2 The problem: 53+59+65+...+233 n(n+6)/(6*2)
asked by David on November 10, 2016 
Physics
A construction crew pulls up an 87.5kg load using a rope thrown over a pulley and pulled by an electric motor. They lift the load 15.1 m and it arrives with a speed of 15.6 m/s having started from rest. Assume that acceleration was not constant. a. How
asked by Anonymous on July 31, 2012 
Physics
A basketball player makes a jump shot. The 0.650kg ball is released at a height of 1.80 m above the floor with a speed of 7.80 m/s. The ball goes through the net 3.10 m above the floor at a speed of 4.40 m/s. What is the work done on the ball by air
asked by A on March 6, 2018 
physics
Calculate the work required to be done to stop a car of 250 kg moving at a speed of 18km/hr? answer is right or not please check Mass =250 kg Velocity = 18kg = 18 x 1000/60 x 60 = 5 m/s KE = ½ mv x v = ½ x 250 x 5 = 125 x 5 = 625 J Therefore the counter
asked by Evangelin Lenin on December 31, 2015 
Physics
A construction crew pulls up an 87.5kg load using a rope thrown over a pulley and pulled by an electric motor. They lift the load 15.1 m and it arrives with a speed of 15.6 m/s having started from rest. Assume that acceleration was not constant. a. How
asked by Anonymous on July 31, 2012 
Grammar
1.Which of the following sentences have (unreduced) compound clauses? Briefly explain your answer. a.I like cities with parks and public sculptures. b.Everyday he either burns the toast or overcooks the eggs. c.Neither does he drink nor does he swear.
asked by Nora on April 7, 2009 
Engineering science
A water pump produces 9KL of water per hour at a height of 70 m above the pump.The pump is driven by a 3 KW electric motor.calculate. 1) The work done per hour 2) The work done per minute
asked by Thulani on September 27, 2014 
Algebra
Use the five steps for problem solving. Enrollment at a particular online university is 11,600. There are seven times as many students who work full time as there are students who do not. How many students work full time and how many do not?
asked by Poochie on July 10, 2011 
Algebra
Use the five steps for solving problems Enrollment at a particular online university is 11,600. There are seven times as many students who work full time as there are students who do not. How many students work full time and how many do not?
asked by Poochie on July 10, 2011 
physics
a 5.0 kg mass hangs at the end of a cord. Find the tension in the cord if the acceleration of the mass is 1.5 m/s squared up. I'm trying to find the formula (s) to plug in the numbers to work the problem. if you can help me with the formulas and plugging
asked by courtland on February 5, 2010 
algebra
Let f(x)= 2x^2 +7 and g(x)= x – 6. (a) Find the composite function (f*g)(x) and simplify. Show work. (b) Find ( f*g)(1). Show work.
asked by david on May 9, 2014 
math
10 men can do a piece of work in 10 days.how many days can 100 men take to do the same amount of work?
asked by mary on July 24, 2009 
about dentists
what clothes are dentists required to wear to work? who will pay for the clothes that they wear to work?
asked by melissa on April 18, 2009 
physics
How much power is required to do 110 J of work on an object in a time of 0.4 s? W How much power is required if the same work is done in 5 s? W
asked by james on January 23, 2012 
maths ( mental ability)
P can do a piece of work in 9 days. Q is 50% more efficient than P. The number of days it takes Q to do the same piece of work is?
asked by rupesh on November 2, 2009 
Math
3. A can do a piece of work in 6 days. B is 50% more efficient. The number of days it take B to do work is A. 9 B. 3 C. 2 D. 4 Is the answer 4? If so, how did you get your answer?
asked by 7th grade Math on August 13, 2015 
math
Number of days taken by 1 man to complete the same work is less than by number of days taken by 1 women to do this work?
asked by renjith on May 17, 2017 
Calculus
Let f (x) = 5x^2 – 9 and g(x) = x – 3. (a) Find the composite function ( f o g)(x) and simplify. Show work. (b) Find ( f o g)(2) . Show work.
asked by Brian on March 10, 2012 
psy
Please help, very lost Eric has computed that it takes an average (mean) of 17 minutes with a standard deviation of 3 minutes to drive from home, park the car, and walk to his job. One day it took Eric 21 minutes to get to work. You would use the formula
asked by mary on February 1, 2010 
psycholgy
Please help, very lost Eric has computed that it takes an average (mean) of 17 minutes with a standard deviation of 3 minutes to drive from home, park the car, and walk to his job. One day it took Eric 21 minutes to get to work. You would use the formula
asked by mary on February 1, 2010 
Physics
a beaker contains 500g of water at a temperature of 80 C. How much ice at a temperature 20 C must be dropped in the water so that the final temperature of the system will be 50 C
asked by Forhad on July 6, 2017 
English Improving writing
Ok this what I have now Thanks to all of you for your help Brain storming revised The problem is Jack and Rachel often has nothing to do Bonnie and Molly is working extra and have to work over time Melanie and Jessica share an administrative assistant
asked by KaleighAnne on June 9, 2008 
marketing
Regarding the current legal environment facing U.S. marketing managers: a. state and local laws vary but contain important regulations. b. the focus has shifted from let the buyer beware to let the seller beware. c. product safety is now controlled. d.
asked by Andrew on January 26, 2013 
SCI 207
Conservationists argue that watershed protection and other ecological functions of forests are more economically valuable than timber. Timber companies argue that continued production supports stable jobs and local economies. If you were a judge attempting
asked by MARYLANIZ on March 7, 2011 
math (discount)
An instrument store gives a 10% discount to all students off the original cost of an instrument. During a back to school sale, an additional 15% is taken off the discounted price. Julie, a student at the local high school, purchases a flute for $306. How
asked by anonymous on September 22, 2007 
math
An instrument store gives a 10% discount to all students off the original cost of an instrument. During a back to school sale an additional 15% is taken off the discounted price. Julie, a student at the local high school, purchases a flute for $306. How
asked by Helen on April 21, 2009 
math
The number of customers that visit a local small business is 51,200 and has been continuously declining at a rate of 3.8% each year. What is the approximate number of customers that visit the business in 14 years?
asked by Anonymous on May 28, 2013 
math
The number of customers that visit a local small business is 51,200 and has been continuously declining at a rate of 3.8% each year. What is the approximate number of customers that visit the business in 14 years?
asked by Anonymous on May 28, 2013 
Algebra
The local zoo keeps the track of the number of dragonflies breeding in their insect exhibit each day. day: 1,2,3,4,5 and dragronflies : 3,8,15,24,35 use an equation to determine the number of dragonflies that will be breeding after 11 days.
asked by Lissett on April 24, 2017 
math
The number of customers that visit a local small business is 51,200 and has been continuously declining at a rate of 3.8% each year. What is the approximate number of customers that visit the business in 14 years
asked by Anonymous on November 4, 2011 
physics
In a local bar, a customer slides an empty beer mug down the counter for a refill. The height of the counter is 1.12 m. The mug slides off the counter and strikes the floor 2.00 m from the base of the counter.
asked by Anonymous on October 10, 2011 
algebre
The number of customers that visit a local small business is 51,200 and has been continuously declining at a rate of 3.8% each year. What is the approximate number of customers that visit the business in 14 years?
asked by brit on March 21, 2013 
pre calc
The number of customers that visit a local small business is 29,600 and has been continuously declining at a rate of 2.9% each year. What is the approximate number of customers that visit the business in 10 years
asked by jmam on September 17, 2013 
math
The number of customers that visit a local small business is 37,800 and has been continuously declining at a rate of 1.7% each year. What is the approximate number of customers that visit the business in 12 years?
asked by Caitlin on July 28, 2013 
Math
Students who buy tickets at a local movies theather receive a 10% discount on the price of a ticket. What is the total price for 4 students tickets if the regular cost per ticket is $6.00 ??
asked by Random girl on August 15, 2016 
PHYSICS
A 41kg box is being pushed a distance of 7.0m across the floor by a force P whose magnitude is 158N. The force P is parallel to the displacement of the box. The coefficient of Kinetic friction is 0.25. Determine the work done on the box by each of the four
asked by Cavin on February 24, 2007 
math
Describe a real life situation that could be modeled by a function. A real life situation is: A family decides that they want to get the carpet done in their house. They already have all the necessary material to do the work but they do not know how. They
asked by Anonymous on October 10, 2010 
algebra
When Amy drives her car to work, the trip takes 1/2 hour. When she rides the bus, it takes 3/4 hour. The average speed of the bus is 12 mph less than her speed driving. Find the distance she travels to work.
asked by Molly on June 19, 2012 
algebra
When Amy drives her car to work, the trip takes 1/2 hour. When she rides the bus, it takes 3/4 hour. The average speed of the bus is 12 mph less than her speed driving. Find the distance she travels to work.
asked by Molly on June 19, 2012 
AlgebraHELP!!!!
When Amy drives her car to work, the trip takes 1/2 hour. When she rides the bus, it takes 3/4 hour. The average speed of the bus is 12 mph less than her speed driving. Find the distance she travels to work.
asked by Molly on June 19, 2012 
physics
A car moving at 50 km/h skids 15 m with locked brakes. Show that a car moving at 150 km/h will skid 135 m with locked brakes. (Hint: The force doing work during the skidding is the same for both speeds. Use the work–energy theorem.)
asked by jeremy steadman on January 6, 2014 
Physics
A person heats a can of soup on a stove. If he does 250 Joules of work ON the soup by stirring it as the burner adds 1675 Joules of heat, what is the change in its internal enegry? I did 250 1675 because the work done On something is negative. can you
asked by angela on March 11, 2012 
Physicscheck answer please (multiple choice)
1. A 2.5 kg mass at rest on a horizontal surface is acted upon by an applied horizontal force of 150 N. A frictional force of 100 N acts on the mass. How much work is done on the mass? my answer: would the work be 0? 2. When a rock is thrown straight up in
asked by Lisa on February 24, 2014 
physics
a 65 kg object is pulled at a constant velocity up an incline w/ a force of 95 N parallel to the incline. Assuming that the difference between the work output and input is work required to overcome friction, what is the force of friction along the incline
asked by Jun on April 8, 2011 
algebra
A car rental company offers two plans for renting a car. Plan A:40 dollars per day and 20 cents per mile. Plan B: 56.32 dollars per day and 12 cents per mile. If you plan to rent the car for one day, and "m" represents the number of miles driven in that
asked by Carlos on March 26, 2017 
science
a car with a mass of 2000 kg moves along the ice with a constant velocity of 10.0 m/s. What is the car's momentum? a. 200.0 N b. 20.000 N c. 200.0 kg x m/s d. 20,000 kg x m/s I know it is twenty thousand, I'm unsure of the measurements or units. Please
asked by kenny on September 21, 2011 
Physics
A dockworker applies a constant horizontal force of 82.0 to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 12.5 in a time 4.60 .
asked by Michael on January 12, 2012 
physics
A puddle filled with 20. kg of water is completely frozen to 6.0 degrees celcius in the middle of winter. How much heat must be absorbed by the puddle to melt the ice and warm the water up to 20. celcius during the spring thaw?
asked by trav on January 27, 2010 
Physics
Which of the following surfaces has the largest amount of static friction against your skin? Which one has the highest coefficient of static friction against your skin? Select one: a. sandpaper b. ice c. wax paper d. A Teflon coated sheet.
asked by Kelsey on September 22, 2013 
chemistry
We calculated that 30.0 grams of ice initially at 10.0 Celsius and it requires 23.1 kj of energy to bring it all the way to a boil. How much additional energy does it take to convert all of the water to steam at 100 degree Celsius? How does this compare
asked by mai on May 4, 2014 
Physics
A hockey puck is sliding on frictionless ice. It slams against the wall and bounces back toward the player with the same speed that it had before hitting the wall. Does the velocity of the hockey puck change in this process? Explain.
asked by Crystal on April 10, 2013 
Physics
a 35 g ice cube at 0.0 C is added to 110 g of water in a 62 g aluminium cup. The cup and the water have an initial temperature of 23 C . Find the equilibrium temperature of this system? in Celsius ,, I've been trying to solve this for 2 hours now , and I
asked by AfterLife on August 20, 2011 
Chemistry
A piece of dry ice (solid carbon dioxide) with a mass of 30.5g is allowed to sublime. Assuming that all of the carbon dioxide ends up in the balloon, what will be the volume of the balloon at a temperature of 22 ∘ C and a pressure of 746mmHg?
asked by Anonymous on August 15, 2013 
Unit 4  Memory, Thinking, and Intelligence
research Spearman's Model of Intelligence and Gardner's Multiple Intelligences. Based on your findings, compare and contrast the two models. Provide several comparisons and several contrasts. Which of the two models do you feel is more in line with
asked by candy on September 21, 2006 
algebra
20. At a local candy store, Malcolm purchased some 25cent candies and some 30cent candies. He spent a total of $4.75. Which equation below describes the number of each type of candy he bought? A25x + 30y = 4.75 Bx + y = (4.75)/(0.25 + 0.30) C25 + x + 30
asked by kimmie on September 28, 2017 
ELA
Your principal is considering inviting a singer or musical group to perform for students at your school to raise money for a local charity. If you could invite anyone, whom would you choose? In a multipleparagraph letter, persuade your principal to invite
asked by hi its me on November 16, 2016 
Unit of Inquiry
Which are the bangladeshi local organizations working to uphold the rights of women and children? What are their goals, missions, structure, function, real life evidence they are working and the challenges they face while they are upholding human rights of
asked by Kate on August 15, 2009 
maths
City records show that 575 burgalaries were reported in a year when the local population was 77000 and 675 were reported in a year when the populatin was 87000 .How many burgalaries can be expected when the population reaches 110,000. ..... Answer is 905
asked by adiba on December 17, 2016 
physics
You see an optical illusion of an everupward spiral staircase. The climber trudges up and up and never gets anywhere, going in circles instead. Suppose the staircase is provided with a narrow ramp, allowing the tired stairclimber to push a wheelbarrow up
asked by Lance on November 4, 2012 
English
Writeacher, I have finally reached an agreement with my German partner. However, I'll have to check the English version of the application form by tomorrow (which is full of mistakes and contradictions! Plus: I'm ill and on sick leave). I really hope you
asked by Henry2 on February 8, 2012 
Math
Homework grades are 5% of the overall grade. Lab work is 15% of the overall grade. Tests are 60% of the overall grade. The Final is 20% of the overall grade. Could a student that has a 75 homework average, 80 lab average, 40 test average, and 50 on the
asked by Veronica on September 19, 2006 
physics
two ice skaters initially at rest push each other.if one skater whose mass is 60kg has a velocity of 2m/s.find the velocity of other skater whose mass is 40kg
asked by kavya on August 3, 2014 
Chemistry
How many grams of ice could be melted by the energy obtained as 18.0 grams of steam is condensed at 100.0 degrees celcius and cooled to 0.0 degrees celcius?
asked by PLEASE on March 3, 2008 
pure physics 5054 grade12 zambian exam
why is it that 10g of ice at freezing point cools a drink faster than water of mass 10g at the same temperature(freezing point) [4marks]
asked by Ackron Z on October 13, 2017 
intro to computers
what overriding philosophy of the windows 8operating system makes it unique compared to earlier Microsoft operating systems? a.it is a universal operating system for all types of devices? b.it can host both 32and 64 bit applications c.up to 192 users can
asked by mary on October 30, 2013 
Science help
Im trying to finish my study guide so i can study this weekend but i have more problems like this and i don't have a clue of what they mean Fertilizers and perticides applied to farm fields in pennsylvania have made their way down into the chesapeake bay
asked by Matt on January 10, 2014 
spelling
write the sentence with a verb in the incorrect tense correctly. welcome, friends of the Zoo! I'd like to thank all of you who kindly donate your time to our local zoo. It's a great honor to be asked to speak at the opening of the Reptile House. As you
asked by JAH on March 19, 2013 
Physics
A pitcher throws a fast ball with a speed of 45m/s. The ball has a mass of 0.145kg. How much a) kinetic energy is given to the ball and b)What work was done in throwing the ball? Vo=45 m/s Mass= 0.145kg A) KE? KE= 1/2mV^2 A) 1.5x10^2 kg*m/s B) WK=Change in
asked by Rosie on May 3, 2016 
Physics
Speedboat (A) negotiates a curve whose radius is 115 m. Speedboat (B) negotiates a curve whose radius is 240 m. Each boat experiences the same centripetal acceleration. What is the ratio vA/vB of the speeds of the boats? My physics optional extra work:
asked by Ryan on September 30, 2016 
maths
A pie graphs show the budget of 2 business for 2 different business.How do you work out the different expenses each month and Calculated the cost in Rands.1 company budget is R12000 and other is R9200.How do u work out the pie graphs .need to get the
asked by zubeida on August 3, 2011 
grammar please help!
I still need help on 1 and 2. Identify the object of the preposition in each of the following sentences. 1. Ashley and her father arrived home from work. a. and b. father c. from d. work 2. Ashley put her journalism books in the new bookcase. a. bookcase
asked by Jade on May 1, 2013 
secend grad math
if 3+x=6 what is x You can turn that around. Work it as a word family. 3 + ___ = 6 6  3 = ___ What do you think? ?? What number can be added to 3 to make 6? 3 + ? = 6? Sorry! I should have written "work it as a number family"!! =)
asked by laura on June 11, 2007 
chemistry
if PV=RT + ἁP where ἁ is a constant Calculate the work if the gas is heated at constant pressure from T1 to T2 Calculate the work if the gas is expanded isothermally and reversibly
asked by noel on February 2, 2011 
geometry
On July 16, 1882, a massive thunderstorm of Dubuque, Iowa, produced huge hailstones. The diameter of some of the hailstones was 17 inches. Ice weighs about 0.033 pounds/inches cubed. What was the approximate weight of these hailstones to the nearest pound?
asked by Helena on March 24, 2015 
Chemisty
In an experiment, 230 kJ of heat energy are released to the surroundings when steam is converted to liquid water. Calculate the number of grams of water condensed. The following data may be of use: vap = 2260 J/g; Hfus = 334 J/g; Cp(ice) = 2.06
asked by Stephen on April 8, 2010 
physics
A sled of mass m is given a kick on a frozen pond. The kick imparts to it an initial speed of 2.80 m/s. The coefficient of kinetic friction between sled and ice is 0.150. Use energy considerations to find the distance the sled moves before it stops.
asked by Emily Tran on November 18, 2012 
science
A researcher put 10.0 moles of N2O into a 2L container at some temperature where it decomposes according to the following: N2O = 2N2+ O2. At equilibrium 2.20 moles of N2O remain. Calculate the Kc for the reaction. How am I supposed to fill in the ICE
asked by Laury on April 6, 2017 
please help me on chem
Commodity prices of NaCl and urea are about $0.033/lb for NaCl (as rock salt) and about $0.10/lb for urea. Calculate the cost of treating 1000 lb of ice on a surface to produce a solution that melts at 3.9 degrees Celsius with each chemical. I know you
asked by K on February 27, 2013 
Physics
A figure skater spins on the ice, holding two weights a distance d from the axis about which he is rotating. At a certain time, he pulls these weights toward his body as shown, causing his rotational inertia to decrease by a factor of 2. How does this
asked by John on March 19, 2011 
Chem lab last question!! Urgent help
Commodity prices of NaCl and urea are about $0.033/lb for NaCl (as rock salt) and about $0.10/lb for urea. Calculate the cost of treating 1000 lb of ice on a surface to produce a solution that melts at 3.9 degrees Celsius with each chemical. I know you
asked by K on February 27, 2013 
chemistry
Commodity prices of NaCl and urea are about $0.033/lb for NaCl (as rock salt) and about $0.10/lb for urea. Calculate the cost of treating 1000 lb of ice on a surface to produce a solution that melts at 3.9 degrees Celsius with each chemical. I know you
asked by K on February 26, 2013 
first steps in using a personal computer
alphonus and larry are discussing start menu commands.alphonus will go to the control panel to see a display of all local and remore drives.larry will go to computer to make changes to some computer settings.who is correct a.neither b.both c.alphonus
asked by susue on November 13, 2013 
Physics
A 1.45 kg book is sliding along a rough horizontal surface. At point A it is moving at 3.25 m/s , and at point B it has slowed to 1.34 m/s . Part A How much work was done on the book between A and B? Part B If 0.750 J of work is done on the book from B to
asked by Jamie on November 12, 2017 
english
This is the first paragraph of my essay, how does it look? Imagine being 6’3” in the eighth grade and everyone in the school making comments about your height. There are definitely advantages and disadvantages to being tall. My best friend’s mother
asked by lizzie on July 13, 2011 
word problem
I have no clue on how to set up this equation please help. A car rental company offers two plans for renting a car. Plan A:21 dollars per day and 18 cents per mile Plan B:25.44 dollars per day and 15 cents per mile If you plan to rent the car for one day.
asked by james on May 3, 2017 
math
Bayside insurance offers two health plans. Under plan A, Giselle would have to pay the first $160 of her medical bills, plus 25% of the rest. Under plan B, Giselle would pay the first $200, but only 20% of the rest. For what amount of medical bills will
asked by Ember on September 17, 2009 
physics
what is the difference between work and workdone I hope the following references will help you: http://www.ac.wwu.edu/~vawter/PhysicsNet/Topics/Work/DefinitionWork.html http://en.wikipedia.org/wiki/Mechanical_work
asked by ada on November 25, 2006 
L.A
Think about the work you completed in your reading character role. Determine the ideas that would be most worthy to share in a literary discussion about Johnny Tremain. Provide an explanation for your choices. How did the role you selected and the work you
asked by anon on December 6, 2015 
Physics
no idea all HELP appreciated!! A shotputter puts a shot (weight = 70.3 N) that leaves his hand at distance of 1.45 m above the ground. (a) Find the work done by the gravitation force when the shot has risen to a height of 2.15 m above the ground. Include
asked by Joe on October 19, 2009 
language art
Think about the work you completed in your reading character role. Determine the ideas that would be most worthy to share in a literary discussion about Johnny Tremain. Provide an explanation for your choices. How did the role you selected and the work you
asked by anon on January 14, 2015 
physics
highway curve in northern Minnesota has a radius of 230 m. The curve is banked so that a car traveling at 21 m/s and will not skid sideways, even if the curve is coated with a frictionless glaze of ice. At what angle to the horizontal is the curve banked?
asked by Anonymous on February 27, 2014 
Physical Science
Judy (mass 45.0 kg), standing on slippery ice, catches her leaping dog, Atti (mass 12kg), moving horizontally at 4.0 m/s. Use the conservation of momentum to find the speed of Judy and her dog after the catch.
asked by Shannon on September 19, 2013 
Math
Serena wanst to borrow $15 000 an pay it back in 10 years. Interest rates are so high, so the bank makes her 2 offers option 1  borrow the money at 12%/a compounded quarterly for the full term option 2 Borrow the money at 12%/a compunded quarterly for 5
asked by Annie on January 10, 2012 
English
1. I can't concentrate on work. 2. I can't concentrate at work. 3. I can't concentrate (on something) at work.  Which one is correct? Does #1 mean #3?
asked by rfvv on June 18, 2016 
Math
"All Items 20% Off Marked Price" is a sign at a local golf pro shop. Create a function and then use it to determine how much one has to pay for each of the following marked items: a $9.40 hat, a $13 umbrella, a $65 pair of golf shoes, a $12.60 golf glove,
asked by Taylor on October 10, 2012 
Econ please help
Suppose local govt decides that a tax is the best way to address the inefficiency created by outdoor concerts. Assuming the social cost curve and the private cost curve are parallel to each other, how much does the tax on concerts have to be to achieve the
asked by Anil on November 13, 2011 
economics
The MidNight Hour, a local nightclub, earned $100,000 in accounting profit last year. This year the owner, who had invested $1 million in the club, decided to close the club. What can you say about economic profit (and the rate of return)in the nightclub
asked by Wilbert on March 3, 2012