Thursday
August 21, 2014

Posts by TIM


Total # Posts: 936

math
thank you
August 11, 2014

math
How to write it in expanded form 12.0067 Is this answer right 1*10+2*1+6*1/1000+7*1/10000
August 11, 2014

math
How to write it in expanded form 12.0067 Is this answer right 1*10+2*1+6*1/1000+7*1/10000
August 11, 2014

math
How to write it in expanded form 12.0067
August 11, 2014

Math
Find an equation of the curve that satisfies the given conditions: (d^2y/dx^2)=6x, the line y=5-3x is tangent to the curve at x=1
July 29, 2014

Math
Suppose you own a tour bus and you book groups of 20 to 70 people for a day tour. the cost per person is $30 minus $0.25 for every ticket sold. Gas and other miscellaneous costs are $200. Part a) Write the revenue and cost functions for this situation Part b)Write the profit ...
July 29, 2014

Calculus
A container in the form of a right circular cone (vertex down) has a radius of 4m and height of 16m. If water is poured into the container at the constant rate of 16m^3/min, how fast is the water level rising when the water is 8m deep. V=(pi/3)(r^2)h
July 27, 2014

calculus
ddx(sin(x3)+(sin(x))3) =ddx(sin(x3))+ddx((sin(x))3) =3⋅(sin(x))2⋅ddx(sin(x))+cos(x3)⋅ddx(x3) =3x2⋅cos(x3)+3⋅cos(x)⋅(sin(x))2
July 17, 2014

Math
A container in the form of a right circular cone (vertex down) has a radius of 4m and height of 16m. If water is poured into the container at the constant rate of 16m^3/min, how fast is the water level rising when the water is 8m deep? V=(pi/)(r^2)h
July 17, 2014

Chemistry
For each of the following examples, decide whether it would be better to use the term molecule or formula unit. a. K2SO3 b. H2SO3 c. CCl4 d. NH4Cl
June 5, 2014

Chemistry
Complete and balance the reactions A) (CH3)2NH(aq)+CH3COOH(aq)→ B) CH3CH2NH2(aq)+HBr(aq)→ C) CH3NH2(aq)+HCOOH(aq)→
June 3, 2014

Physics
A 275-gram ball bounces off a wall. The ball stays in a horizontal plane throughout the motion. The ball strikes the wall with a speed of 4.50 m/s at an angle of 𝜃 = 35.0o relative to the wall and rebounds with the same speed at the same angle. If the ball is in ...
May 27, 2014

geometry
there exists a circle with chords. the chords are congruent. their corresponding arc measurements are 80 degrees and 2x+10 solve for x
May 21, 2014

Chemistry
Free-energy change, ΔG∘, is related to cell potential, E∘, by the equation ΔG∘=−nFE∘ where n is the number of moles of electrons transferred and F=96,500C/(mol e−) is the Faraday constant. When E∘ is measured in volts, Δ...
May 18, 2014

Chemistry
Suppose a patient is given 140mg of I−131, a beta emitter with a half-life of 8.0 days. Assuming that none of the I−131 is eliminated from the person's body in the first 4.0 hours of treatment, what is the exposure (in Ci) during those first four hours? Express...
May 14, 2014

Chemistry
Suppose a patient is given 140mg of I−131, a beta emitter with a half-life of 8.0 days. Assuming that none of the I−131 is eliminated from the person's body in the first 4.0 hours of treatment, what is the exposure (in Ci) during those first four hours? Express...
May 14, 2014

Physics
A daredevil performs a stunt in which he jumps with his motorcycle from a horizontal cliff 10m high. What must the initial velocity of the motorcycle be, in order for the stuntman to barely clear a 10m wide water canal at the base of the cliff?
May 8, 2014

Physics
A little girl is standing on a cliff and throws a ball straight down at a speed of 5m/s towards the ground below. How far has it fallen 2.0 seconds after it leaves her hand?
May 8, 2014

Physics
A ball leaves a table with an initial horizontal velocity of 2.4m/s. The height of the table is adjustable. In two runs, the height of the table is set at 2.5m and 5.0m respectively. Assume air resistance is negligible. What is the horizontal distance between the two landing ...
May 8, 2014

calculus help
Find the derivative of the function. y = integral from cosx to sinx (ln(8+3v)) dv lower limit = cosx upper limit = sinx y'(x) = ????
May 7, 2014

Physics/Calculus
It takes a force of 21,714lb to compress a coil spring assembly on a New York City Transit Authority subway car from its height of 8in to its fully compressed height of 5in. A. What is the assemblys force constant? B. How much work does it take to compress the assembly the ...
May 2, 2014

Calculus/Physics
A spring has a natural length of 10in. An 800lb force stretches the spring to 14in. A. Find the force constant B. How much work is done in stretching the spring from 10 to 12 inches? C. How far beyond its natural length will a 1600lb force stretch the spring.
May 2, 2014

Calculus/Physics
It took 1800J of work to stretch a spring from its natural length of 2m to a length of 5m. Find the spring's force constant.
May 2, 2014

Physics MCQ - Quick check
Thanks Damon
April 28, 2014

Calculus
The following are about an infinite region in the 1st quadrant between y=e^-x and the x-axis. B)Find the volume of the solid generated by revolving the region about the y-axis Part A was solved below. Does anyone know how to do Part B?
April 27, 2014

Calculus
Thank you. What about part B?
April 27, 2014

Calculus
The following are about an infinite region in the 1st quadrant between y=e^-x and the x-axis. A) Find the area of the region B)Find the volume of the solid generated by revolving the region about the y-axis
April 27, 2014

Calculus
Limit as x approaches 0 of x(1-cosx)/t-sinx. Confused on how to get this answer.
April 21, 2014

Calculus
Determine the behavior of limits A. Limit as x approaches 1 of: (log x)/((x-1)^2) B. Limit as x approaches infinity of: ((x-1)^2)/(log x))
April 21, 2014

Calculus
Thanks
April 21, 2014

Calculus
Evaluate limit as x approaches 0 of: csc^2(7x)tan(2x^2)
April 21, 2014

CHEMISTRY HELP !!!!
As a standard voltaic cell runs, it "discharges" and the cell potential decreases with time. Explain.
April 19, 2014

Calculus Help!!!!!
sketch the graph of the following. Show all your work and include all the important points and asymptotes. also find y' and y'' ? y= (x^3)/(x+1)^2
April 16, 2014

Physics
A "reference ring" with moment of inertia Ic rests on a solid disk torsion pendulum with a moment of inertia I0. a) What is the period T0 for the motion with the disk alone? b) What is the period T1 for motion with the combined system? c) Use the expressions from a) ...
April 14, 2014

algebra
solve the following: 300e^.06x = 1500
April 11, 2014

algebra
Evaluate: log base 5 379
April 11, 2014

CHEMISTRY HELP !!!! Check
using Kb, for NH3 (from Appendix E), calculate Ka for the NH4+ ion. Kb for NH3 is 1.81 x 10^-5 Ka for NH4+ is Kw / Kb = 10^-14 / 1.81 x 10^-5 = 5.52 x 10^-10
April 10, 2014

Calculus Help Please!!! Urgent!!!
If x^3 - y^3 =3 , use only implicit diff. to find d^2y/dx^2 . Express your answer in terms of x and y only and write is as a proper fraction that is completely simplified as much as possible. d^2y/dx^2= -6x/y^5 (this is the answer I should get but i dont know how to show steps...
April 9, 2014

Calculus Help Please!!!
A stone is dropped into a lake, creating a circular ripple that travels outward at a speed of 40 cm/s. Find the rate at which the area within the circle is increasing after each of the following. after 1 s = after 3 s = after 7 s =
April 2, 2014

Calculus Help Please!!!
Consider the following. f(x) = 8x (square root of (x − x^2)) (a) Use a graph to find the absolute maximum and minimum values of the function to two decimal places.
April 1, 2014

Damon
The question was like this!
March 30, 2014

Calculus Help Please!!!
Verify the given linear approximation at a = 0. Then determine the values of x for which the linear approximation is accurate to within 0.1. (Enter your answer using interval notation. Round your answers to three decimal places.) ln(1 + x) ≈ x xE
March 30, 2014

Physics
Two pucks with similar masses collide with each other over a nearly frictionless surface. At the moment of collision, a sharp knocking sound is produced. Is this collision elastic or inelastic? Explain.
March 30, 2014

Physics
Consider an isolated system consisting of two masses, each of which has a velocity vector in two dimensions. When these two masses collide the total momentum of the system is conserved. (a) Show that if the total momentum of the system is conserved then the component momenta ...
March 30, 2014

algebra
The monthly cost of driving a car depends on the number of miles driven. Lynn found that in May her driving cost was $310 for 140 mi and in June her cost was $450 for 700 mi. Assume that there is a linear relationship between the monthly cost C of driving a car and the ...
March 29, 2014

Physics
A 4700 kg vehicle on a level surface experiences a force applied due to the engine of 3700 N forward. If the force of friction acting on the vehicle is 189 N backward: Determine the values of the other forces acting on the vehicle. Draw a free body diagram and determine the ...
March 20, 2014

CALCULUS HELP
Let r(x)= f(g(h(x))), where h(1)=4, g(4)=5, h'(1)=3 , g'(4)=5 and f'(5)=7. find r'(1).
March 20, 2014

Calculus Help
Use logarithmic differentiation to find the derivative of the function. show steps please! y=(e^-xcos^2(x))/(x^2+x+1)
March 16, 2014

Calc
I was trying to solve the same question and couldnt find the domain. if someone can help me with it, I will be thankful.
March 16, 2014

Calc
what is the domain?
March 16, 2014

Calculus
Find equations of both the tangent lines to the ellipse x^2 + 4y^2 = 36 that pass through the point (12, 3). smaller slope y= larger slope y=
March 14, 2014

Physics
Assume a spring has an un-stretched length Xo. Write an expression for the elastic potential energy of the spring in terms of the position of the end of the spring X and its spring constant K.
March 14, 2014

Physics
Assume a spring has an un-stretched length Xo. Write an expression for the elastic potential energy of the spring in terms of the position of the end of the spring x and its spring constant k.
March 13, 2014

Physics
Consider the gravitational potential, kinetic, and total mechanical energies of a cart moving down an inclined ramp. (Also, let gravitational potential energy be defined to be zero when the cart is at the bottom of the ramp. A. Write an expression for the gravitational ...
March 13, 2014

Calculus
Find all points on the graph of the function f(x) = 2 cos x + cos^2 x at which the tangent line is horizontal. (Use n as your arbitrary integer.) smaller y-value (x,y)= larger y-value (x,y)=
March 9, 2014

Math
What is an equation for the line that passes through points(4,-4) and (8-4)?
March 9, 2014

Calculus Help
Find a parabola with equation y = ax^2 + bx + c that has slope 6 at x = 1, slope −14 at x = −1, and passes through the point (2, 17).
March 7, 2014

Algebra word problems
You have a total of $175 in $5 and $20 bills. The number of $5 bills you have is 3 more than 4 times the number of $20 bills. How many of each type of bill do you have?
March 6, 2014

math 2
255
March 6, 2014

Physics
COULD I GET SOME HELP?
March 3, 2014

Physics
A dynamics cart with a friction pad is placed at the top of an inclined track and released from rest. The cart accelerates down the incline at a rate of .60m/s^2. If the track is angled at 10 degrees above the horizontal, determine the coefficient of kinetic friction between ...
March 3, 2014

Physics
A baseball player rounds third base and is heading for home when he is signaled by the base coach to slide. The player has a speed of 3.5m/s when he begins to slide and he travels through a linear distance of 1.50 meters before coming to rest. Determine the coefficient of ...
March 3, 2014

Calculus Help
Let P(t) be the percentage of Americans under the age of 18 at time t. The table gives values of this function in census years from 1950 to 2000. (I didnt put the table here because it will not display well so the table has basically t as time from 1950 to 2000 and P(t) values...
March 2, 2014

Calc Help Please
I did some of them so can you help me with the rest. Consider the piecewise functon f(x) = (4x^2-3)/(3x^2-15) x<(-2) square root of(4-x^2) (-2)<-x<-(2) 5 x>2 lim x->-2^- f(x)= ?????? lim x->-2^+ f(x)= 0 f(-2)= 0 f(4) = 5 list the values of x for which f(x) is...
February 28, 2014

Math
the smallest regulation golf ball has a volume of 2.48 cubic inches. if the diameter of the ball were increased by 10%, or a factor of 1.1, what will the volume of the golf ball be?
February 27, 2014

Philosophy( Please Help Me))
Hi, can someone please tell me whether or not I have choose the correct answer for these three questions. 1. According to Gilligan, which of the following best describes male thinking? a. Males adopt a personal way of relating to moral issues. b. Males adopt an abstract way of...
February 27, 2014

Calculus
the correct answer I was given has a negative 1/3 before the log. Also, how did you get the 1/3 value?
February 24, 2014

Calculus
Evaluate the integral: (cos(2-3x) - tan(5-3x))dx
February 24, 2014

Physics
Assume that you take data on the projectile range for a variety of different launch angles A at a fixed initial velocity Vo. You would like to plot your data to see if the range formula discussed in the introduction is supported by the data. The easiest way to do this is to ...
February 17, 2014

Physics
For a given initial projectile speed, you observe that the projectile has a certain range R at a launch angle A = 30 degrees. For what other launch angle will the projectile have the same range (assuming the same initial projectile speed)? Without the use of mathematical ...
February 17, 2014

Physics
For a given initial projectile speed Vo, calculate what launch angle A gives the longest range R. Show your work, don't just quote a number.
February 17, 2014

Physics
Make a predictive statement about the path dependence of accelerations due to gravity
February 10, 2014

Physics
Calculate the time it would take for an object to fall through a linear height equal to the objects starting height, h for a 20 degree incline.
February 10, 2014

Physics
An object begins at rest on a frictionless inclined plane at a linear distance of 2.0m from the base of the incline. If the incline makes an angle of 20 degrees with the horizontal, determine the time it will take for the object to reach the base of the incline.
February 10, 2014

Physics
Thanks for the help. It is much appreciated!
February 3, 2014

Physics
A small washer is taped to a golf ball and the ball is hung from an electromagnet. When a trigger is activated the electromagnet will shut off and the golf ball will fall through a height of 75 cm to land on a time of flight pad. Determine the amount of time it will take for ...
February 3, 2014

Physics
An object at rest accelerates through a distance of 1.5 m at which point the instantaneous velocity of the object is 3.5m/s. Determine: a. The average acceleration of the object b. The time it took the object to travel 1.5m c. The average velocity of the object during this ...
February 3, 2014

maths
One pump fills a tank two times as fast as another pump. If the pumps work together they fill the tank in 18 minutes. How long does it take each pump working alone to fill the tank?
February 2, 2014

physics
A car is being pulled out of the mud by two forces that are applied by the two ropes shown in the drawing. The dashed line in the drawing bisects the 30.0° angle. The magnitude of the force applied by each rope is 2900 newtons (N). (a) How much force would a single rope ...
January 27, 2014

maths
A coin box contained some twenty-cent and fifty-cent coins in the ratio 4 : 3. After 20 twenty-cent coins were taken out to exchange for fifty-cents coins of the same value and put back in the box, the ratio of the number of twenty-cent coins to the number of fifty-cents coins...
January 27, 2014

Maths
Thanks Steve. Where is 12 come from?
January 27, 2014

Maths
Daniel's watering can holds 6L of water when full. He fills his watering can 3 times from the bucket and then the bucket is empty. How much more waterdoes one full bucket hold than Daniel's full watering can? A 3L B 9L C 12L D 18L
January 27, 2014

MATHS
Ken had three times as many apples as papayas. After selling 160 apples and 25 papayas, he had twice as many papayas as apples left. How many fruits did he have at first?
January 27, 2014

MATH
Mrs Lim is 41 years old and her daughter is 14 years old. How many years ago was Mrs Lim four times as old as her daughter?
January 26, 2014

business
Tim Urban, owner/manager of Urban's Motor Court in Key West, is considering outsourcing the daily room cleanup for his motel to Duffy's Maid Service. Tim rents an average of 50 rooms for each of 365 nights (365 X 50 equals the total rooms rented for the year(. Tim'...
January 22, 2014

Chemistry
1.42e9 2.36e-10
December 21, 2013

math
a dealer has 30 cars and trucks. If 2 more cars are delivered, the dealer will have 3 times as many cars as trucks. How many trucks does the dealer presently have?
December 14, 2013

physics
a .2 kg ball is being swung around a verticle circle from a 1 m long string, the ball is traveling at 4 m/s counter -clockwise. what is the tension on the string?
December 8, 2013

science
If an automobile engine delivers 40.2 hp of power, how much time will it take for the engine to do 5.90 ✕ 105 J of work? (Hint: Note that one horsepower, 1 hp, is equal to 746 watts.)
December 3, 2013

4th Grade Math: Help Is Needed ASAP
My son is in the fourth grade and is needing help with these math problems. Can someone please help him with these problems. 1. 2/3+2/9= 2. 3/5+3/10= 3. 5/12+1/3= 4. Find the sum of 1/6 and 1/12 5. Add 1/4 to the answer in Exercise 4. 6. What is the sum of 1/8, 1/4, and 3/8? 7...
November 18, 2013

TO ANY MATH HELPERS
1) x= -.5 y= -.5 2) x=.5 y=5
November 18, 2013

English
Zach used to work at an independent record label. Negotiating could be exciting, but he was supposed to slant everything in the label’s favor. Some reps used questionable tactics. He couldn’t look at himself in the mirror if he treated people like that. First ...
November 18, 2013

English
When the servers arrived, Jack gave them the information on today's specials. He talked enthusiastically about the fresh berries: "They look fantastic! I want to serve them with shortcake." 1. In the above passage, "talked" is an example of a(n): a)...
November 18, 2013

Math 5th grade
Thank you Ms. Sue!
November 11, 2013

Math 5th grade
1. 16/40, 24/60 2. 24/30, 36/45 3. 24/40, 36/60
November 11, 2013

Math 5th grade
write two fractions that are equivalent to each fraction. 1. 8/20 2. 12/15 3. 12/20 Can u please show me
November 11, 2013

Math 5th grade
Write two fractions that are equivalent to each fraction. 1. 2/5 2. 21/35
November 11, 2013

English... Urgent
Hi this is a mystery problem can you solve this? The best forger of all time was indeed a most brilliant artist and a man respected and sought after in the criminal world. One day he was asked to copy $50 notes but the police searched his premises before be even got started ...
October 26, 2013

English... Urgent
Look at the following puzzles and try to decipher the well known sayings 1. Ban ana 2.nafish nafish 3.japmadean 4.issue issue issue issue issue issue issue issue issue issue 5. Lookuleap Note that I have not typed any of these words wrong
October 26, 2013

Algebra II
Having trouble solving this... Write the equation if a line that goes through (6,-1/2) and has an x-intercept of 5x-2y=-20 I think the x-intercept is -4, but I don't know what to do with that.
October 24, 2013

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