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October 25, 2014

Search: An elevator (mass 4125 kg) is to be designed so that the maximum acceleration is 0.0900g. What is the maximum force the motor should exert on the supporting cable?

Number of results: 36,258

Algebra 2
One hundred feet of fencing is available to make a rectangular dog pen against an existing wall. What are the dimensions of the pen that will yield the maximum area? I need all of the steps to get to the answer.
April 22, 2011 by Brandon

Calculus 12 Optimization
A farmer wishes to make two rectangular enclosures with no fence along the river and a 10m opening for a tractor to enter. If 1034 m of fence is available, what will the dimension of each enclosure be for their areas to be a maximum?
May 19, 2011 by K.lee

statistics
Given a level of confidence of 99% and a population standard deviation of 7, answer the following: (A) What other information is necessary to find the sample size (n)? (B) Find the Maximum Error of Estimate (E) if n = 74. Show all work
September 2, 2011 by Laynette

College Physics
A 4.30 kg block starts from rest and slides down a frictionless incline, dropping a vertical distance of 2.60 m, before compressing a spring of force constant 2.20 104 N/m. Find the maximum compression of the spring.
October 14, 2011 by Allen

College Physics
A 4.30 kg block starts from rest and slides down a frictionless incline, dropping a vertical distance of 2.60 m, before compressing a spring of force constant 2.20 104 N/m. Find the maximum compression of the spring.
October 14, 2011 by Allen

College Physics
A 4.30 kg block starts from rest and slides down a frictionless incline, dropping a vertical distance of 2.60 m, before compressing a spring of force constant 2.20 104 N/m. Find the maximum compression of the spring.
October 14, 2011 by Allen

College Physics
A 4.30 kg block starts from rest and slides down a frictionless incline, dropping a vertical distance of 2.60 m, before compressing a spring of force constant 2.20 104 N/m. Find the maximum compression of the spring.
October 14, 2011 by Allen

College Physics
A 4.30 kg block starts from rest and slides down a frictionless incline, dropping a vertical distance of 2.60 m, before compressing a spring of force constant 2.20 104 N/m. Find the maximum compression of the spring.
October 14, 2011 by Allen

statistics
Given a level of confidence of 99% & a population standard deviation of 10, answer the following: (A)What other information is necessary to find the sample size (n)? (B)Find the Maximum Error of Estimate (E) if n=77. show all work.
May 30, 2012 by melissa

chem
2C2H6(g) + 7O2 -> 4CO2 (g) + 6 H2o (g) What quantity of reactant remains after ignition of a mixture that contains 0.40 moles of C2H6 mixed with 1.60 moles of O2? ( assume maximum reaction according to the equation above)
August 26, 2012 by greeny

Physics- Projectiles
A marlin jumps out of the water with an initial velocity of 5.0 meters per second at an angle of 80 degrees above horizontal. Approximately what maximum height will the marlin reach during it's flight?
October 24, 2012 by Olivia

Physics
A coin is dropped from a hot-air balloon that is 325 m above the ground and rising at 12.5 m/s upward. For this problem use a coordinate system in which up is positive. Find the maximum height reached for the coin in meters
February 15, 2014 by Anonymous

Physics please help
The engine of a train has a mass of 5x10^4 kg. it can accelerate six railway cars having a total mass of 3x10^5 kg by 0.4 m/s^2 (the 6 railway cars have a combined mass of 3x10^5). what acceleration can the same engine using the same force give to four railway cars having a ...
April 25, 2011 by Jess J

Physics
A 166 g mass is attached to a horizontally mounted spring. It is pulled out to stretch the spring and then released. You determine the period of the oscilliation to be 1.0 seconds. What is the acceleration of the mass (magnitude) when the spring is stretched 33 cm during the ...
April 26, 2011 by Paige

College Physics
Can someone check my answers for two and help me with the third? 1) A mass m at the end of a spring of spring constant k is undergoing simple harmonic oscillations with amplitude A. Part (a) At what positive value of displacement x in terms of A is the potential energy 1/9 of ...
April 25, 2014 by Michelle

Physics
This problem concerns a student that is attempting Newton's 2nd Law, but the cart does not run without friction. How do I calculate the drag force, givin the mass of the cart (7.6kg), the mass of the load (4.2kg), and the resulting acceleration (1.2m/s2)? I'd appreciate the ...
October 6, 2007 by Jenny

physics
If the earth doubled in mass but stayed the same size, what would be the acceleration due to gravity at the surface? m/s2 The dimensions of the earth as we currently know it are: Mass = 5.98E24 kg, Radius = 6.38E6 m and the universal gravitational constant = 6.67e-11 nm2/kg2
September 23, 2014 by Girma

Physics please help
The engine of a train has a mass of 5x10^4 kg. it can accelerate six railway cars having a total mass of 3x10^5 kg by 0.4 m/s^2 (the 6 railway cars have a combined mass of 3x10^5). what acceleration can the same engine using the same force give to four railway cars having a ...
April 20, 2011 by Jess J

Physics please help
The engine of a train has a mass of 5x10^4 kg. it can accelerate six railway cars having a total mass of 3x10^5 kg by 0.4 m/s^2 (the 6 railway cars have a combined mass of 3x10^5). what acceleration can the same engine using the same force give to four railway cars having a ...
April 25, 2011 by Jess J

physics
find mass of a rocket as a function of time,if it moves with constant acceleration a in absence of external forces.the gas escapes with a constant velocity u relative to the rocket and its mass initialy was m'
January 16, 2011 by sreeram

Physics
a 2 kg mass and a 3 kg mass are attached to a lightweight cord that passes over a frictionless pully. the hanging masses are left free to move. a. in what direction will the smaller masses move? b.what will be its acceleration
December 5, 2012 by chris

Physics
A hanging block of mass X is pressed with a force F at angle theta to the vertical against a frictionless wall and is connected to another hanging block of mass Y by a pulley system. What is the expression for the acceleration of Y?
September 25, 2014 by Anonymous-Please Help!

physics, torque
A crane shown in the drawing is lifting a 170-kg crate upward with an acceleration of 1.8 m/s2. The cable from the crate passes over a solid cylindrical pulley at the top of the boom. The pulley has a mass of 130 kg. The cable is then wound onto a hollow cylindrical drum that ...
June 4, 2007 by Marigold

Physics
A person on top of a wall of height 3.4 m stands near the edge, leans over and tosses a putty wad of mass 1.3 kg vertically into the air as shown in the figure below. The wad reaches a maximum of 4 m above the top of the wall. The wad then comes down and hits the ground near ...
February 20, 2011 by kelly

Physics
The engine of a train has a mass of 5x10^4 kg. it can accelerate six railway cars having a total mass of 3x10^5 kg by 0.4 m/s^2 (the 6 railway cars have a combined mass of 3x10^5). what acceleration can the same engine using the same force give to four railway cars having a ...
April 20, 2011 by Jess J

physics
A force of 30 N pulls a mass left at 30 degrees to the horizontal and one of 100 N pulls right at 120 degrees. If the mass of the mass which is 50 kg, find the acceletation if coeffcient of sliding is .01? What would be the equation of this problem? If you are talking about a ...
November 20, 2006 by randy

Cosmology
In a universe where the scale factor is proportional to t^α, where t is time and α is a constant less than one, the universe has: * the sign of the acceleration is undetermined * negative acceleration * positive acceleration * zero acceleration
January 16, 2013 by qwerty

PHYSICS
if force acts on body WHOSE ACTION LINE does not Passes through its center of gravity then body will experience A ANGULAR ACCELERATION b linear acceleration C ZERO ACCELERATION D ZERO ACCELERATION
June 13, 2014 by AYESHA

math
If a ball is thrown directly upward with a velocity of 80ft/s, its height (in feet) after t seconds is given by y=80t-16t^2. What is the maximum height attained by the ball?
December 15, 2007 by lucy

Physics
An object is thrown vertically and has an upward velocity of 18 m/s when it reaches one fourth of its maximum height above its launch point. What is the initial (launch) speed of the object?
September 15, 2008 by Eve

math
the concentration of a mixture is guven be the following function: c(t)=(2x+9)/3(x+12) A.what is the maximum amount of concentration that this function can reach in terms of percent? B. what is the name of the line you looke for to answer part A.
January 15, 2009 by leah

math
Joe has $10,000 to purchase a used car. If the sales tax is 7% and the fee for title and license plates is $200, what is the maximum amount Joe can spend for a car?
November 11, 2009 by mc

math
Joe has $10,000 to purchase a used car. If the sales tax is 7% and the fee for title and license plates is $200, what is the maximum amount Joe can spend for a car?
January 11, 2010 by LeAnne

11th Grade Physics
The maximum speed of a bus is 72km/h, it accelerates uniformly at the rate of 1m/s^2 and retards uniformly at the rate of 4m/s^2. Find the least time in which it can do a journey of 1km ?
July 27, 2010 by Praveen

optimization
A model space shuttle is propelled into the air and is described by the equation y= (-x2/2e) +ex (in 1000 ft), where y is its height in feet above the ground. What is the maximum height that the shuttle reaches?
January 13, 2011 by james

Calculus Optimization
A model space shuttle is propelled into the air and is described by the equation y=-x^2/2e + ex (in 1000 ft), where y is its height above the ground. What is the maximum height that the shuttle reaches?
January 18, 2011 by jennifer

physics
A rock is thrown upward from the level ground in such a way that the maximum height of its flight is equal to its horizontal range d. (a) At what angle θ is the rock thrown?
February 18, 2011 by eric

physics
An unknown magnetic field produces a set of lines for a transition from a state with l = 3 to one with l = 2, between which there is a maximum energy difference of 6.1x10-4 eV. How many lines are there? What is the magnitude of the field?
May 20, 2011 by alice

construction
A swimming pool is 120' long,45' wide and 10' deep.How long would it take to fill with water if your maximum fill rate was 15 gallons per minute?
July 26, 2011 by Mark

algebra
Make a box with a square base using only 250 square feet of material. what dimensions for the box will produce a maximum valume? what is the maximym volume?
October 15, 2011 by Nabil

math
A rancher has 296 feet of fencing to enclose two adjacent rectangular corrals. What dimensions will produce the largest total area? What is the maximum total area?
February 8, 2012 by girl

physics 1
The position of a particle moving along the x-axis is given by x = 3.49t2 – 2.21t3, where x is in meters and t is in seconds. What is the position of the particle when it achieves its maximum speed in the positive x-direction?
February 22, 2012 by jelena pleeease help

PHYSİCS
The position of a particle moving along the x-axis is given by x = 3.49t2 – 2.21t3, where x is in meters and t is in seconds. What is the position of the particle when it achieves its maximum speed in the positive x-direction?
February 24, 2012 by MARİA

Physics 2
A wire has a length of 4.52 x 10-2 m and is used to make a circular coil of one turn. There is a current of 7.94 A in the wire. In the presence of a 8.04-T magnetic field, what is the maximum torque that this coil can experience?
February 25, 2012 by Megan

Physics 2
A wire has a length of 4.52 x 10-2 m and is used to make a circular coil of one turn. There is a current of 7.94 A in the wire. In the presence of a 8.04-T magnetic field, what is the maximum torque that this coil can experience?
February 25, 2012 by Megan

calculus
Find the absolute maximum and absolute minimum values of f on the given interval [π/4, 7π/4]. (Round all answers to two decimal places.) f(t) = t + cot(t/2)
March 2, 2012 by Michael

Math need help
y= sqrt(81-x^2) What length and width should the rectangle have so that its area is a maximum? (smaller value) (larger value) I have no clue how to do this, so if someone could please help! thank you
March 11, 2012 by Angelina

College Algebra
The number of Mosquitoes M9x), in millions, in a certain area depends on the June rainfall x, in inches:M(x)=19x-x^2. What rainfall produces the maximum number of mosquitos?
April 16, 2012 by Abreanna

Physics
An object is thrown vertically and has an upward velocity of 5 m/s when it reaches three fourths of its maximum height above its launch point. What is the initial (launch) speed of the object?
May 18, 2012 by James

Physics
An object is thrown vertically and has an upward velocity of 5 m/s when it reaches three fourths of its maximum height above its launch point. What is the initial (launch) speed of the object?
May 18, 2012 by James

Physics
Stephanie hits a volleyball from a height of 0.80m and gives it on initial velocity of 17.5m/s straight up 1. How high will the volleyball go? 2.how long will it take the ball to reach its maximum height?
February 6, 2013 by Jessica

Physics
What is the maximum charge that can be put on a conducting sphere of radius 15 cm if it is not to spark? That is, the electric field at its surface cannot exceed the dielectric strength of air. b) What is the sphere's voltage at this charge?
February 27, 2013 by lindsey

Physics
A wire has a length of 5.40 10-2 m and is used to make a circular coil of one turn. There is a current of 2.30 A in the wire. In the presence of a 3.80-T magnetic field, what is the maximum torque that this coil can experience?
March 25, 2013 by Don

Physics
A wire has a length of 5.40 10-2 m and is used to make a circular coil of one turn. There is a current of 2.30 A in the wire. In the presence of a 3.80-T magnetic field, what is the maximum torque that this coil can experience?
March 25, 2013 by Don

Chemistry
a chemist carries out the reaction of 0.250 mol of f2 with excess of cl2. At 250 degress C and 1.00 atm, what is the maximum volume of CLF3 in liters that the reaction can produce?
March 27, 2013 by Emilee

Physics
A ball is thrown straight up, when it reaches the maximum height x, a second identical ball is thrown up with the same initial velocity as the first one. Where will these balls meet.
September 11, 2013 by John

Physics
A ball is thrown straight up, when it reaches the maximum height x, a second identical ball is thrown up with the same initial velocity as the first one. Where will these balls meet.
September 11, 2013 by John

MATH 12
The total surface area of a square-based open top rectangular box is 12 square units. Find the dimensions of the box such that the volume is the maximum.
April 28, 2014 by BIINWEI

maths
a)Express y = 2 (x - 1) (x - 5) in the form y = ax^2 + bx + c. b) From the above quadratic equation calculate the following: I) x and y intercepts II) Coordinate of the turning point III) Is the graph a maximum or minimum turning point?
May 20, 2014 by Shane

physics
a stone is thrown straight up from a 50m high building and hits the ground at a speed of 37.1m/s. What is the initial velocity and what is the maximum height above the ground that the stone reaches?
June 28, 2014 by kristen

Physics
A plane with a velocity of 111. 9 meters per second at a maximum rate of 6.8 m/s^2 the plane touches the runaway what's the minimum time before it can come to rest? A=6.8m/s^2 V=111.9m/s t=?
September 28, 2014 by Danielle

Physics
*I am lost on a bunch of different problems, and this is one of them. Please note that I am NOT asking for final answers, just some guidance so that I can figure out how to do the problem!!! I know that a lot of times on this site it is commented that we are fishing for ...
October 8, 2006 by Justin

Statistics
A large electronics company wants to estimate the proportion of all households that own GPS machines. What sample size is required that would give the maximum error of 2.0% for a 95% confidence interval? An unscentific survey had an inital result of 30% .
April 16, 2013 by Sue

phy
1 What is the gravitational field strength at a height h above the surface of the Earth? R is the radius of the earth gR2(R+h)2 gR(R+h) Rg(R−h) R2g(R−h)2 2 The instrument used for experimental determination of the value of the universal gravitational constant G is ...
January 28, 2013 by christ

physics
1 What is the gravitational field strength at a height h above the surface of the Earth? R is the radius of the earth gR2(R+h)2 gR(R+h) Rg(R−h) R2g(R−h)2 2 The instrument used for experimental determination of the value of the universal gravitational constant G is ...
February 12, 2014 by nandeve

Physics
A long uniform rod of length 6.66 m and mass 6.74 kg is pivoted about a horizontal, frictionless pin through one end. The rod is released from rest in a vertical position as in the figure. Question 1: At the instant the rod is horizontal, find its angular speed. The ...
October 31, 2008 by Jimmy

physics
A man throws a ball straight up in the air with an initial speed of 24 meter per second. How long does it take for the ball to return to him? What is the maximum height of the ball above the point where it was thrown?
December 6, 2011 by r

Chemistry
Consider the voltaic cell illustrated in the figure, which is based on the cell reaction: Zn(s)+Cu^2+(aq) -> Zn^2+(aq)+Cu(s) Under standard conditions, what is the maximum electrical work, in joules, that the cell can accomplish if 52.0g of copper is plated out?
April 16, 2012 by Steven

Chemistry
Consider the voltaic cell illustrated in the figure, which is based on the cell reaction: Zn(s)+Cu^2+(aq) -> Zn^2+(aq)+Cu(s) Under standard conditions, what is the maximum electrical work, in joules, that the cell can accomplish if 52.0g of copper is plated out?
April 16, 2012 by Steven

CALCULUS DERIVATIVES CONTINUITY
Let f be the function defined by the piecewise function: f(x) = x^3 for x less than or equal to 0 x for x greater than 0 Which of the following is true? a) f is an odd function b) f is discontinuous at x=0 c) f has a relative maximum d) f'(0) = 0 e) f'(x) > 0 for (x is not ...
May 31, 2012 by NEED HELP NOW

Geometry
A farmer wants to fence in a rectangular pen using the wall of a barn for one side of the pen and 115 feet of fencing for the remaining 3 sides. What dimensions will give her the maximum area for the pen?
October 30, 2012 by Jammy

trig
On a typical day at an ocean port, the water has a maximum depth of 18m at 6:00 am. The minimum depth of 9m occurs 6.8 hours later. Write an equation to describe the relationship between the depth and time.
April 29, 2014 by Sam

Math
The underside of a bridge has a shape of a parabolic arch. It has a maximum height of 30m and a width of 50m. Can a sailboat with a mast of 28m above the water pass under the bridge 8m from the middle of the bridge?
May 26, 2014 by Lorrie

economics
I answered some questions. pls check if they are correct and pls help in questions e and f. Production Possibilities Possibility Maximum Units of Good A Maximum Units of Good B a 200 0 b 180 60 c 160 100 d 100 160 e 40 200 f 0 220 a. Plot these production possibilities, label ...
December 15, 2008 by jason

Physics
a 96.4kg boxer has his first match in the canal zone with gravitational acceleration 9.782m/s^2 and his second match at the north pole with gravitational acceleration 9.832m/s^2. What is his mass in the canal zone? answer in units of kg
September 24, 2012 by sam

Physics
A research balloon of total mass 200 kg is descending vertically with a downward acceleration of 3.2 m/s^2. How much ballast must be thrown from the car to give the balloon an upward acceleration equal to 2.8 m/s^2, presuming that the upward lift of the balloon does not change...
November 28, 2007 by Lindsay

Physics Class
A 166 g mass is attached to a horizontally mounted spring. It is pulled out to stretch the spring and then released. You determine the period of the oscilliation to be 1.0 seconds. What is the acceleration of the mass (magnitude) when the spring is stretched 33 cm during the ...
April 27, 2011 by Paige

Calculus (pleas help!!!)
Find a formula for a curve of the form y=e^((−(x−a)^2)/b) for b greater than 0 with a local maximum at x=−5 and points of inflection at x=−8 and x=−2.
April 6, 2011 by Claudia

Calculus Please Help
Find a formula for a curve of the form y=e^((−(x−a)^2)/b) for b greater than 0 with a local maximum at x=−5 and points of inflection at x=−8 and x=−2.
April 6, 2011 by Claudia

Calculus (urgent!!)
Find a formula for a curve of the form y=e^((−(x−a)^2)/b) for b greater than 0 with a local maximum at x=−5 and points of inflection at x=−8 and x=−2.
April 6, 2011 by Claudia

Calculus (urgent!!)
Find a formula for a curve of the form y=e^((−(x−a)^2)/b) for b greater than 0 with a local maximum at x=−5 and points of inflection at x=−8 and x=−2.
April 6, 2011 by Claudia

physics.
Multiple-Concept Example 3 provides some pertinent background for this problem. Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occuring electrons is removed. The radius of ...
February 11, 2009 by Jordan

Physics
Multiple-Concept Example 3 provides some pertinent background for this problem. Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occuring electrons is removed. The radius of ...
February 11, 2009 by Sarah

Physics
Two forces act on a 0.200 kg ant: F1 =(3.00i - 8.00j)N and F2=(5.00i + 3.00j)N. Express the net acceleration of the ant in unit vector notation. The resultant force is 8.00 i - 5.00 j Newtons. Divide that by the mass (0.2 kg) for the acceleration vector, in m/s^2.
February 20, 2007 by Daniel

Physics
I don't really understand this aspect of physics yet, I need help understanding these problems. Problem One: Two particles, with identical positive charges and a separation of 2.00 10-2 m, are released from rest. Immediately after the release, particle 1 has an acceleration a1...
August 31, 2007 by Jim

Physics
A 6100 kg rocket is set for vertical firing from the ground. If the exhaust speed is 1200 m/s how much gas must be ejected each second if the thrust a) is to equal the magnitude of the gravitaiotnal force on the rocker and b) is to give the rocket an inital upward acceleration...
February 9, 2007 by sarah

physics mechanics
A 2 kg mass rests on a horizontal table with a light spring with a force constant of 200 Nm-1 attached to it. The coefficient of static friction between the mass and the table is 0.7 and the coefficient of kinetic friction is 0.5. How far must the spring be stretched ...
October 26, 2013 by njood

cary collage
"A 2.5-kg block slides down a 25 degree inclined plane with constant acceleration. The block starts from rest at the top. At the bottom, its velocity reaches 0.65 m/s. The length of the incline is 1.6m. a) What is the acceleration of the block? b) What is the coefficient of ...
September 27, 2010 by sahan

physics
A student moves a box of books down the hall by pulling on a rope attached to the box. The student pulls with a force of 173 N at an angle of 27.5 above the horizontal. The box has a mass of 27 kg, and μk between the box and the floor is 0.2. The acceleration of gravity ...
November 6, 2012 by scott

Physics
Vertical beam of mercury (Hg atomic mass =202u) atoms emerges from the oven kept at T= 400K. Consider three atoms, emerging from the oven: one with the average speed, one with the rms speed, and the other with the most probable speed of the Maxwellian distribution a) Find the ...
February 6, 2014 by Brody

Math, Physics
Two blocks with indicated masses are connected by a cable of negligible mass over a pulley with radius 45cm. The block on the incline is sliding without friction and experiences a constant acceleration of 2 m/sec^2. Determine the mass of the pulley
June 23, 2013 by Sterling

physics
a small mass is suspended from along thread so as to form a simple pendulum.the period T of the oxillation depend on the mass M,the length L of the thread and the acceleration G of free fall at the place concerned so that T =km^x,L^y,G^z where K = 2pie 1. Find the values of x,...
October 5, 2013 by praise

math
An architect is designing the floors for a hotel. Each floor is to be rectangular and is allotted 720 ft of security piping around walls outside the rooms. What dimensions of the atrium will allow an atrium at the bottom to have maximum area?
August 16, 2010 by rick

MATH...PLZ HELP
Given a level of confidence of 99% and a population standard deviation of 13, answer the following: (A) What other information is necessary to find the sample size (n)? (B) Find the Maximum Error of Estimate (E) if n = 61. Show all work.
November 6, 2011 by Jennifer

Calculus AB
Find a, b, c, and d such that the cubic function ax^3 + bx^2 + cx + d satisfies the given conditions Relative maximum: (2,4) Relative minimum: (4,2) Inflection point: (3,3) So this is what I have so far: f'(x) = 3a^2 + 2bx + c f''(x) = 6ax + 2b f(2) = a(8) + b(4) + c(2) + d= 4...
November 18, 2011 by Savannah

math
A rectangular parking lot is to be constructed on land bordered on one side by an alley. There is 360 ft of fencing to use along the other three sides. What should be the dimensions of the lot if the enclosed area is to be maximum?
January 27, 2012 by mike

Geometry
According to OSHA, a ladder that is placed against a wall should make a 75.5 degree angle with the ground for optimal safety. To the nearest tenth of a foot, what is the maximum height that a 10-ft ladder can safely reach?(trigonometry)
January 13, 2012 by Anonymous

math
define a variable and write an equality for each situation the maximum speed allowed on main st is 25 miles per hour a trainer advises an athlete to keep rate under 140 beats per minute
October 13, 2012 by anonymous

chemistry
For the new compound ICl2F+2: Calculate the maximum wavelength of electromagnetic radiation that is capable of breaking the weakest bond. Express your answer in meters. Bond energies (kJ/mol) are: I-I (150) F-F (160) Cl-Cl (240) unanswered
November 17, 2012 by amar chauhan

math
The daily production costs P (in dollars) for a manufacturer of sound systems is given by the quadratic function. P(x)= -0.003x^2+150x-375,000 Where x is the number of units produced. What production level will yield a maximum profit?
June 8, 2014 by julissa

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