Questions Asked on
March 8, 2014

CHEMISTRY
Consider the reaction N2+O2>2NO with Delta H=43.2kcal. When 50.0g of N2 react with an excess of oxygen, how much heat is generated/consumed? I know that this is an endothermic reaction b/c of the + delta H, is there some sort of formula to use here? I
asked by Shaun 
Algebra
On Monday, it took Helen 3 hours to do a page of science homework exercises. The next day she did the same number of exercises in 2 hours. If her average rate on Monday was p exercises per hour, what was her average rate the next day, in terms of p? I know
asked by Jeremy 
Physics
A 5.36 kg object falls freely (ignore air resistance), after being dropped from rest. Determine the initial kinetic energy, the final kinetic energy, and the change in kinetic energy for the following. (a) first meter of fall initial kinetic energy 0 J
asked by George 
Algebra 1
How many twodigit numbers have a tens digit that is greater than the units digit? Explain.
asked by Jackie 
business math
Paul Curcio earns $8.25 per hour for regular time up to 40 hours, timeandahalf for overtime, and double time for the midnight shift. Last week Paul worked 58 hours, including 6 on the midnight shift. What are his gross earnings?
asked by shanise 
Math
Mrs Harvey Wants To Put a 50 m Long Fence around Her Rectangular Garden. She Only Needs To Fence In 3 Sides Because The Other Side Is Alongside Her House. (a) Write an Expression For y In Terms of x (b) Write an Expression For The Area ( A ) Of The Garden
asked by Josh 
phys
A short 10g string is used to pull a 50g toy across a frictionless horizontal surface. If a 3.0 x 10^(–2)N force is applied horizontally to the free end, the force of the string on the toy, at the other end, is: A) 0.15 N B) 6.0 x 10^(–3) N C) 2.5 x
asked by tony 
MATH
A photograph has been enlarged to three times its previous size. By what percentage has the size of the photograph increased?
asked by bRIAN 
math
Jerry King is a server in a restaurant that pays a salary of $22 per day. He also averages tips of 18% of his total gross food orders. Last week he worked 6 days and had total food orders of $2,766.50. What was his total gross pay for the week?
asked by Anonymous 
UV
the two lenses in contact are 45 cm away from the object and the distance of the object from the image is 110 cm. if one of the two lenses in contact has a focal length of 15cm, what is the focal length of the second lens? thanks :)
asked by Melissa 
MATH
The height h (in meters) of a cannonball t seconds after it is fired into the air is given by h=4t^2+16t+9. a) What is the initial height of the cannonball? What feature does this correspond to on the graph? b) Find the height of the cannonball after 1
asked by Josh 
Engineering science
A brick with a mass of 6kg is dropped vertically from a certain height.it takes 4,5 seconds for the brick to reach the ground.determine the ff.the height from which the brick is dropped and potential energy of the brick
asked by Peter 
Algebra 1
Mr. Keskin and his wife have a cell phone plan that charges them $5 for 200 text messages per month for each of their phones. The Keskins are charged an additional $0.12 for each text message over their 200textmessage limit. Their carrier has offered
asked by Jackie 
G.N.M.P.S
A solid weighs 1000g in air , 75g in water, and 70g in oil. Calculates the relative density of oil ?
asked by shakshi 
Data manegment
From 7 candidates of which 4 are males and 3 are females,how many ways can the positions of president,vicepresident and Treasurer be filled if the president must be female and the other two positions must be males.
asked by Nisarg 
math
Mrs Harvey Wants To Put a 50 m Long Fence around Her Rectangular Garden. She Only Needs To Fence In 3 Sides Because The Other Side Is Alongside Her House. y=length x=width (a) Write an Expression For y In Terms of x (b) Write an Expression For The Area ( A
asked by Josh 
Physics
A penny rests on top of a bowling ball. You give the bowling ball a slight bump and the penny slides off the frictionless, spherical surface as shown below. At what angle θ does the penny leave the surface of the bowling ball? (Hint: When the penny leaves
asked by George 
Statistics
Consider the standard normal distribution. Find the area for the zscore 0.75. Draw a picture of this distribution showing the location of the zscore and the mean. Shade the region corresponding to the area found for the zscore.
asked by LaToya 
math
Paul Curcio earns $8.25 per hour for regular time up to 40 hours, timeandahalf for overtime, and double time for the midnight shift. Last week Paul worked 58 hours, including 6 on the midnight shift. What are his gross earnings?
asked by Anonymous 
Economy
The Good’n’Fresh Grocery Store has two checkout lanes and four employees. Employees are equally skilled, and all are able to either operate a register (checkers) or bag groceries (baggers). The store owner assigns one checker and one bagger to each
asked by Karma 
Physics
A 2050 kg truck is traveling east through an intersection at 2.3 m/s when it is hit simultaneously from the side and the rear. (Some people have all the luck!) One car is a 1200 kg compact traveling north at 4.5 m/s. The other is a 1600 kg midsize
asked by Carly 
chemistry
What mass of bromine gas will form from the complete reaction of 150 g potassium bromide and 120 g of chlorine
asked by heather 
physics
A 0.380 kg pendulum bob passes through the lowest part of its path at a speed of 2.03 m/s. What is the tension in the pendulum cable at this point if the pendulum is 83.1 cm long? When the pendulum reaches its highest point, what angle does the cable make
asked by Tully 
physicslenses
trace and describe the image formed by a convex lens (object between 2f and f)
asked by marian 
algebra
find two point for the following equation and plot the point on graph 4x=5
asked by claudia 
math
help select the x coordinate of the vertex of paraloa defined by function f(x) 5x^2+7x+3 stck between two options =5/7 or 7/5
asked by WINSTON 
chemistry
Which of the following pairs are both exothermic processes? Question options: a. Evaporation/melting b. Evaporation/freezing c. Condensation/melting d. Condensation/freezing
asked by peterson 
chemistry
Consider the following chemical reaction: 2H2O2(L) ¨ 2H2O(L) + O2(g) ƒ¢Hrxn = 196.1 kJ How much heat is released if 2 moles of O2 are produced?
asked by peterson 
math
Jennifer Brunner works 40 hours per week as a chef's assistant. At the rate of $7.60 per hour, what are her gross weekly earnings?
asked by Anonymous 
Physics
A bronze cannon ball with a mass of 4.5 kg is fired vertically from a small cannon and reaches a height of 10.0 m. If the canon is now aimed at an angle 33 degrees above the horizontal, calculate the horizontal distance the cannon ball would travel before
asked by Yarielis 
applied algebra
$800 at 5 1/2% annual interest, compound semiannually, for 7 years
asked by frankie 
Business Math
As a newly hired staff accountant for Jordan Designs, you have been asked to conduct the yearend physical inventory. During the process, you observe that much of the inventory is outdated and there fore could not be sold for the recorded cost. You
asked by Dionne 
Physics
A 2050 kg truck is traveling east through an intersection at 2.3 m/s when it is hit simultaneously from the side and the rear. (Some people have all the luck!) One car is a 1200 kg compact traveling north at 4.5 m/s. The other is a 1600 kg midsize
asked by Jonathan 
Algebra 1
Buying paint in large quantities is often less expensive. Five 1gallon buckets cost 25% more than a single 5gallon bucket. Suppose that a job requires g gallons of paint. For what values of g should a 5gallon bucket be purchased to minimize cost?
asked by Jackie 
Calculas
Find the area of the region under the curve y = 12 e ^{3 x} between x = 2.6 to x =2.6
asked by ryan 
chemistry
How much 6.0M NaoH must be added to 0.5L of a buffer that is 0.0200M acetic acid and 0.0250M sodium acetate to raise the PH to 5.75
asked by Mohanad 
calculus
Find the area of the region under the curve y = 16 e ^{4 x} between x = 1.4 to x =1.4 .
asked by ricky 
calculus
At a summer campfire, the radius of a marshmallow on a stick expands at the rate of \ {r ' (t)} = \frac{2.1 }{1 t + 5} mm/s where t is the time of heating in seconds. Initially the radius was 3.8 mm. Find the radius after 27 seconds using the following
asked by ricky 
calculus
Ice cream drips out of the bottom of an ice cream cone on a hot day at a rate of r(t) mL per second, as a child eats it slowly, where t is in seconds. If r(t) = 10 e^{k t}, complete the definite integral expressing the quantity of ice cream lost in the
asked by ricky 
calculus
At a summer campfire, the radius of a marshmallow on a stick expands at the rate of \ {r ' (t)} = \frac{2.4 }{3 t + 6} mm/s where t is the time of heating in seconds. Initially the radius was 3.8 mm. Find the radius after 16 seconds using the following
asked by Marcus 
calculus
The following definite integral can be evaluated by subtracting F(B)  F(A), where F(B) and F(A) are found from substituting the limits of integration. \int_{0}^{4} \frac{1600 x +1200 }{(2 x^2 +3 x +1)^5}dx After substitution, the upper limit of
asked by ricky 
calculus
a. The value of \displaystyle \int_{2}^{1} \frac{14}{ 4 x } dx is b. The value of \displaystyle \int_{1}^{2} \frac{14}{ 4 x } dx is
asked by ricky 
calculus
A long narrow piece of land gets flooded each year by a river. The flooded area is in the shape of the area under the curve y = 2.3 x^3 and above the xaxis, for 0 \le x \le 3.2. All the distances are in metres.
asked by ricky 
calculus
\int_{4}^{13} f(x) \,dx  \int_{4}^{11} f(x) \,dx = \int_{a}^{b} f(x) \,dx where a= and b= .
asked by ricky 
calculus
The velocity of a skateboard is v(t) = t^2  4 t + 3 m/s when moving in a straight line. A. Find the the change in displacement of the skateboard between 4 seconds and 6 seconds. (Note this may or may not be negative, meaning it goes in the opposite
asked by ricky 
History
You are secretary of state John Hay, what is a succinct but general statement of united states foreign policy at the time (late nineteenth/ early twentieth centuries.
asked by anonymous 
Physics
a person's metabolic processes can usually operate at a power of 6 W/kg of body mass for several hours at a time. If a 60 kg woman carrying a 12 kg pack is walking uphill with an energyconversion efficiency of 20 percent, at what rate, in meters/hour,
asked by Meghan 
optimization
A farmer wants to make 9 identical rectangular enclosures as shown in the diagram below. If he has 720 feet of fencing materials, what should the dimensions of each enclosure be if the total area is to be maximized?
asked by dillon 
english
Give me some quotes for writing a para about oscar wilde's caught sneezing
asked by ajai 
Integral calculus
It requires 8 inch pounds of work to stretch a certain spring 2 inches from its rest position. Assuming that the spring follows hooke's law, what is k? Thanks for your answers! :)
asked by Kenya Nagai 
Social studies
It is1:30 a.m at 0 degrees. What is the time at 45 degrees east.
asked by Iyeikie 
Cold War
Francis Gary Powers' U2 mission on May 1, 1960 commenced in A) Paris. B) Moscow. C) Norway. D) Pakistan.
asked by Isabella 
Calculus
It requires 8 inch pounds of work to stretch a certain spring 2 inches from its rest position. Assuming that the spring follows hooke's law, what is k? Please answer this question. Thanks for your answers in advance.
asked by Kenya Nagai 
physics
A 75.5 kg skier encounters a dip in the snow's surface that has a circular cross section with radius of curvature of $r$ = 10.1 m. If the skier's speed at point A in the figure below is 7.82 m/s, what is the normal force exerted by the snow on the skier at
asked by Casa 
math
can you help me With my homework.
asked by anna 
ECON
If you save $250 each year for the next 20 years, how much money would you have if you earned 9%?
asked by BRIANNA 
algebra
Matthew would like to join an online book club that costs $84 per year. If he signs up for an automatic renewal, he will get 5% off his membership. If he signs up in July, he can get an additional 20% off. In addition, for every 2 people he refers to the
asked by juan 
Math~
Mr. D. O. Nutt brought a baker’s dozen, or 13, pastries to the math department meeting. Everyone ate at least 1 pastry, some (not all) had 2, and one person had 3. What are the possible numbers of people who could be in the department?
asked by Guteluope 
physics
A converging lens is 50cm away from the object. if the distance of the image from the object is 120cm and greater than four times the focal length of the lens, what is the focal length of the said lens?
asked by sofia 
physics
A jet plane takes about 56 s to go from rest to the takeoff speed of 120 mph (miles per hour). What is the average horizontal force that the seat exerts on the back of a 60kg passenger during takeoff? First make sure that each of the values are in SI
asked by Melissa 
physicslenses
a certain Galilean telescope has a magnification of 2 times. if the focal length of the objective lens is 60 cm, how long is the telescope? thanks :))
asked by thalia 
computer
Wap in JAVA to input a 4digit no. and find largest using nested if.
asked by Tatvabodh 
math
can some one help me ... determind the equation of g(x) that results translating the funtion f(x)=x^2 +19 upward 15 units,,,, the answere im stuck is not sure g(x)=x^2+24 0r is it g(x)=(x+15)^2 +9
asked by WINSTON 
History
Describe something about the industrial revolution in britain
asked by Tatvabodh 
physicslenses
we are different
asked by Marian/Melissa/Thalia/Sofia 
chemistry
A student is working on a research project. The instructions in the book on how to prepare Ni(NH3)6Cl2 say that the percent yield in this preparation is 75.5 %. If the limiting reagent for the preparation is NiCl2·6H2O, and the student needs 50.0 grams of
asked by jody 
Physicsmotion
A car accelerates uniformly from rest at a. After a certain time, its acceleration becomes a. It continues to travel and stops finally. If the total displacement of the car is L, what is the total time of travel? The answer is (4L/a)^(1/2). But why??
asked by Anonymous 
science
A decrease in “food miles” will most likely increase the environmental impact of any given food.
asked by barbera 
Algebra
which oft the following types of data s not suited for display on a scatter plot a  relationship between age and number of books read in a year b  relationship between height and shoe size c  relationship between calories consumed and wight d 
asked by Steve 
Algebra
I' sorry I meant D
asked by Steve 
Math
A group meeting is attended by 14 delegates. 9 of the delegates are from Atlantis and 5 of the delegates are from Zedonia. (a) In how many ways can the group choose 6 of the 14 delegates to form a negotiation panel? Show work. (b) In how many ways can the
asked by Shelly 
Math
In 1997, a typical American consumed 52 liters of bottled water, and in 2001, a typical American consumed 74 liters of bottled water. Let y be the number of liters of bottled water consumed by a typical American in the year x, where x = 0 represents the
asked by Shelly 
Math
A person travels 8 mi, due north, 3 mi, due west and 7 mi due south how far are they from were they started?
asked by Jason 
Statistics
In a certain population of clover, the number of flowers on each plant is approximately normally distributed with a mean of 10.8 flowers/plant and a standard deviation of 2.1 flowers/plant. What percentage of the plants fall between 8 and 11 flowers?
asked by Keisha 
chemistry
Calculate the DHof for the following reaction under standard state conditions: 2 Ag2S(s) + 2 H2O(l) > 4 Ag(s) + 2 H2S(g) + O2(g) Given the following information: Ag2S(s) ÄHof = 32.6 kJ/mol H2O(l) Ä Hof = 285.83 kJ/mol H2S(g) ÄHof = 20.6 kJ/mol
asked by peterson 
chemistry
Consider the following problem: Target: 2NOCl (g) ¡æ N2 (g) + O2 (g) + Cl2 (g) ¥ÄHrxn= ? Steps: 1. ¨ö N2(g) + ¨ö O2(g) ¡æ NO(g) ¥ÄH= 90.3 kJ 2. NO(g) + ¨ö Cl2(g) ¡æ NOCl(g) ¥Ä H= 38.6 kJ As you determine the ¥ÄHrxn value for the target
asked by peterson 
Statitics
A Department of Transportation report about air travel that 5 out of every 1000 pieces of luggage are lost by the airlines. You are traveling with a group of people who have 22 pieces of luggage. What is the probability that 2 of these are lost? Set up the
asked by Brenda 
chemistry
75.0 g of H2O at 23.0 oC is added to 100.0 g of H2O at 67.5 oC. What is the temperature of the resulting mixture?
asked by peterson 
finite math
The Megabuck Hospital Corp. is to build a statesubsidized nursing home catering to homeless patients as well as highincome patients. State regulations require that every subsidized nursing home must house a minimum of 760 homeless patients and no more
asked by Samuel 
Statistics
If I don't know the mean and the standard deviation how can I find the area of zscore 0.75
asked by LaToya 
Physics
The force on a particle is directed along an x axis and given by F = 1.7(x/2.8  0.95) where x is in meters and F is in Newtons. Find the work done by the force in moving the particle from x = 0 to x = 6.9 m.
asked by Robin 
science
I'm instructed to wrtie a full lab raport for a lab I did a couple of months ago. My aim was to find the most efficient concentration of fertilizer to grow red lentils. I planned to do this by taking the average of the number of lentils sprouted each day
asked by Anonymous 
Physics
A single force acts on a 1.1 kg particlelike object in such a way that the position of the object as a function of time is given by x = 4.1t  3.6t2 + 4.5t3, with x in meters and t in seconds. Find the work done on the object by the force from t = 0 to t
asked by Robin 
Physics
Three forces, F1 = 9.2 N, F2 = 7.8 N and F3 = 8.3 N are acting on a small box of mass 47.0 kg. If the box is moving in the direction of F2 at constant speed, what is the magnitude of the combination of F2 and F3
asked by Yarielis 
PHYSICS
the sum of the magnitude of two forces acting at a point is 18 and the magnitude of their resultant is 12.if the resultant is at 90 degree with the force of the smaller magnitude, then their magnitudes are:
asked by Ayesha 
further maths
calculate d area of a cirular path 3m wide surrounding a cirular plot of radius 20m
asked by olagbegi 
math
Pamela Mello is paid on an incremental commission schedule. She is paid 2.6% on the first $60,000 and 3.4% on any sales over $60,000. If her weekly sales volume was $89,400, what was her total commission?
asked by Anonymous 
math
Thomas Rendell's company pays him a straight 6% commission with a $1,350 drawing account each month. If his sales last month totaled $152,480, how much commission is owed to Thomas?
asked by Anonymous 
math
Compute Mike's estimated tax payment for the fourth quarter. He is selfemployed and he expects to earn $20,640 this year. His estimated income tax rate is 18%. For selfemployed persons, social security tax is 12.4% of wages up to $106,800, and Medicare
asked by Anonymous 
math
Mary Jo Prenaris is an office manager with gross earnings of $1,600 semimonthly. If her company switches pay schedules from semimonthly to biweekly, what are Mary Jo's new gross earnings?
asked by Anonymous 
Statistics
If I don't know the mean and the standard deviation how can I find the area of zscore 0.75
asked by LaToya 
math
What will be the total deduction for social security and Medicare taxes on Juanita's next weekly paycheck of $720 if she has already earned $10,800 this year? Social security tax is 6.2% of wages up to $106,800. Medicare tax is 1.45% of all wages.
asked by Anonymous 
Physics
Block A in the figure weighs 48.0N . The coefficient of static friction between the block and the surface on which it rests is 0.250. The weight w is 6.00N and the system remains at rest. Find the friction force exerted on block A. Find the maximum
asked by Julia 
Statistics
For the zscore meanSD how do you get the percentage without using a calculator
asked by LaToya 
BUS 307 Operations management
PLEASE HELP!!! 1. What percent of North American gross domestic product is accounted for by logistics? (Points : 1) almost 11 percent almost 22 percent almost 33 percent almost 44 percent ( 1.Not sure of this Answer) 2. An item that is expensive, complex,
asked by Patti 
Math
The length of a rectangle is 3 cm less than 4 times its width. The perimeter is 74 cm. Find the length
asked by Ivan 
physics
You reach out a secondstory window that is 17 m above the sidewalk and throw a 2kg ball straing upward with 17 J of kinetic energy. Use g = 10m/s^2 Part A) What is the ball's gravitational potential energy when it is released? Use a height measured from
asked by Melissa 
Statistics
I have 8 marbles: 3 blue, 1 green, 4v reds. What is the probability of selecting a blue marble twice with replacement and twice without replacement
asked by Marissa 
Math
Given that f(x) = 2x2 – 3, find f(2)
asked by Tom 
Math
x varies directly as y3 . If x is 32 when y is 2, find x when y is –3
asked by Maria 
Business Calc
We deposit $19000 into an account earning 3% interest compounded semiannually. How many years will it take for the account to grow to $47500 ? Round to 2 decimal places.
asked by Jessica 
Physics
A stone is dropped from the top of a 83.0 m tall building. How far above the ground is the stone 1.60 seconds before it reaches the ground?
asked by Yarielis 
Life orientation
Identify 5 practises that are in contravention of the Basic conditions of employment Act
asked by Lebo 
Math
Find the standard form of the equation of a line passing through (2, 3) and parallel to 3x + 5y = 2
asked by Martha 
Algebra ll
y = 3t I need to write a real world situation that can be modeled by that equation, but i have no idea, i need help...
asked by Me 
chemistry
A student stated that the solubility of KCL, at 20 degrees Celsius was 36 grams of KCL per 100 grams of solution. What is wrong with this statement?
asked by Anonymous 
chemistry
A student stated that the solubility of KCl at 20 degrees Celsius was 36 grams of KCl per 100 grams of solution. What is wrong with this statement?
asked by Anonymous 
Physical Science
22. Why does a heat pump need an external source of energy (such as electrical energy)?
asked by Alex 
Math
Put the quadratics below into vertex form by completing the square. state the vertex. a) y=x^2  4x21
asked by Lily 
Math
Put the quadratics below into vertex form by completing the square. state the vertex. y=2x^2  4x6
asked by Lily 
math
A student has a penny, nickel, dime, and quarter distributed two coins apiece to his front two pants pockets. What is the probability that the front right pocket has more then 30 cents in it?
asked by Brittany 
math
For the graph y find both xintercepts by solving the equation 3x^2  24x + 45 =0
asked by Max 
physics
A stationary rocket is launched vertically upward. After 4s, the rocket's fuel is used up and it is 225.6 m above the ground. At this instant the velocity of the rocket is 112,8 m/s. Then the rocket undergoes free fall. Ignore the effect of the air
asked by clement 
Physics
A car of mass m moving at a speed v1 collides and couples with the back of a truck of mass 3m moving initially in the same direction as the car at a lower speed v2. (Use any variable or symbol stated above as necessary.) (b) What is the change in kinetic
asked by Joe 
general chemistry
How much 6.0M NaoH must be added to 0.5L of a buffer that is 0.0200M acetic acid and 0.0250M sodium acetate to raise the PH to 5.75
asked by Mohanad 
Physical Science
Describe convection in a room heated by a radiator.
asked by CJ 
Math
For the graph y find both xintercepts by solving the equation 3x^2  24x + 45 =0 a) Direction of opening b)yintercepts c)Axis of symmetry d) vertex e) max or min
asked by Max 
Albegra
step by step on how to solve this problem 2420/(570+r) = 2140/(570r)
asked by Emmanuel 
Algebra 1
What is the first natural number that is a perfect square and a perfect cube? Can you find the second? The third? Explain.
asked by Jackie 
Algebra 1
Mrs. Crenshaw has confiscated 4 cell phones from 4 different students because they used them during class. To get the cell phones back, they have to answer the following question: What is the probability that no student receives his or her own phone if
asked by Jackie 
Algebra 1
If 111 > 13, 112 > 24, 114 > 46, and 115 > 57, complete this statement: 117 > ____. Explain.
asked by Jackie 
Algebra 1
Matthew would like to join an online book club that costs $84 per year. If he signs up for an automatic renewal, he will get 5% off his membership. If he signs op in July, he will get an additional 20% off. In addition, for every 2 people he refers to the
asked by Jackie 
Algebra 1
A circular oil spill is spreading over the surface of a lake. The circle's radius grows by 500 meters every hour. How many square kilometers did the spill grow between 24 hours and 48 hours? Explain.
asked by Jackie 
Education
How does formal and informal learning experiences combine to make up a persons learning network? Why is it important for a instructional designer to understand these connections?
asked by Cathy 
Algebra 1
If 20% of your classmates own an iPad, 12% own an iPad and an iPhone, and 74% own neither, what percentage own an iPhone? Explain.
asked by Jackie 
Algebra 1
Minnie is painting her wallin closet. Each gallon of paint covers 275 square feet.The closet is in the shape of a right rectangular prism. The floor is 9 feet wide and 7 feet long. The ceiling is 8 feet high. How many gallons of paint should Minnie buy to
asked by Jackie 
Statistics
Prev Up Next (1 pt) Suppose that in the year 2000, the cost of a compact car averaged $ 12600 and that in 2003, the cost averaged $ 14100. Assuming that the relationship between year t and cost c is linear, develop a formula for predicting the average cost
asked by Rebecca 
Careers
What exactly is a translation career? I know it has something to do with learning many languages.
asked by Anonymous