Thursday
July 2, 2015

Posts by tim


Total # Posts: 1,015

PreCal
Thanks, I am understanding now.
September 5, 2011

bus/stats
a sample of the personal files of eight male employees revealed that, during a six-month period, they lost the following number of days due to illness: 2,0,6,3,10,4,1 and 2. Calculate the standard deviation of the above sample? the means deviation is 2.375? but not sure how to...
September 3, 2011

MATHS
Four points lie in a plane. They are partitioned into two pairs so that the sum of the lengths of the segments joining the points of each pair has the minimal possible value. Prove that these segments have no common points.
September 3, 2011

bus. /stats
Use the data given in the table to construct a frequency distribution and ogive? Before constructing a dam on a Hill river, the Army corps of engineers performed a series of tests to measure the water flow past the proposed location of the dam. The results of the testing were ...
September 3, 2011

buss./stats
a sample of the personal files of eight male employees revealed that during a six month period they lost the following number of days due to illness 2, 0, 6, 3, 10, 4, 1, 2 calculate the standard deviation show your work
September 2, 2011

business and stats
What type of data is the projected return on an investment? Qualitative , continous, attribute,discrete or none of the above
August 31, 2011

Communication
For the following, state the value of the discriminant and then describe the nature of the sloution. -3x^2-8x-19=0
August 2, 2011

English
I need to check my work on diagramming this question. How many players are on a team? I think it should be as follows: How (adverb) many (adjective) players (direct object) are (past tense verb) on (proposition) a (definite article) team (subject of proposition)? Does this ...
August 1, 2011

College algebra
Solve. V^2-6v-16=0
July 31, 2011

Algebra
How do i simplify 3n^2+3n/6n^2+9 by removing factors of 1
July 29, 2011

Math
what is 3x3x4 is
July 17, 2011

algebra
10 cm^3 of a normal specimen of human blood contains 1.2 g of hemoglobin. How many grams does 17 cm^3 of the same blood contain?
July 15, 2011

Math
A firecracker is launched straight up, and its height is a function of time, h(t)= -14^2 + 112t, where h is the height in feet and t is the time in seconds with t=0 corresponding to the instant it launches. What is the height 5 seconds after launch? What is the domain of this ...
July 8, 2011

chem
What pressure (atm) is exerted by a column of ethanol 86.0 cm high. The density of ethanol is 0.789 g/cm3 and 9.8 m/s2 as your gravitational constant.
July 6, 2011

PHY
A traveling wave is produced on a rope. The wave travels until it hits a wall and it is reflected. If the speed of the wave is 1.8 m/s and it takes 3.3 s to get back to the starting point, how long (m) is the rope.
July 5, 2011

chem
The average distance between planet X and Earth is about 1.5 x 10^8 miles. How long (minutes would it take pictures transmitted from a space vehicle on Planet X's surface to reach Earth?
July 2, 2011

chem
At 36.4°C a sample of ammonia gas exerts a pressure of 6.8 atm. What is the pressure when the volume of the gas is reduced to one-fourth of the original value at the same temperature
June 29, 2011

mirco-economics
yes
June 25, 2011

mirco-economics
Help In the first case (Total Fixed Cost equal one million: Total variable cost equal $ 4.4M ($ 4M for wages (fifty thousand workers time eighty dollars per worker) plus four hundred thousand other variable inputs. Average variable cost equal twenty two dollars (Total variable...
June 25, 2011

math
is the pair of lines parallel x+2y=7 and 2x+4y=3
June 16, 2011

physics
A man lifts various loads with the same lever. The distance of the applied force from the fulcrum is 1.00 m, and the distance from the fulcrum to the load is 0.250 m. What is the mechanical advantage of the lever? What is the ideal mechanical advantage of the lever? What is ...
June 8, 2011

physics
3. A man lifts various loads with the same lever. The distance of the applied force from the fulcrum is 1.00 m, and the distance from the fulcrum to the load is 0.250 m. What is the mechanical advantage of the lever? What is the ideal mechanical advantage of the lever? What is...
June 8, 2011

Math
How do i graph the function y^2=x*(x-4)^2. I have no idea where to begin.
May 31, 2011

human resource management
1. Critically evaluate the job analysis that Mary conducted for the position of assistant manager. Has she used appropriate methods? What are the strengths and weaknesses of her efforts? 2. What kind of factors about Today's Fashion and its operations should Mary have ...
May 25, 2011

math
fractions equivalent to 18/24
May 15, 2011

math
Wats 12yds 2ft + 5yds 2ft
May 2, 2011

physics
in terms of ph,explain what would if you happen if you if you mixed vinegar with a solution of ammonia what type of products would form
May 2, 2011

math
if all nos in the equation y/y+101 = 11in base 2, solve for y
April 27, 2011

Compound math
P*(1+i)* Exponent which is time invested $8000x(1+.o62)30 $8000 x ((1 + .062)^30) = $48,621.1794 U.S. dollars
April 19, 2011

physics
What mass (in grams) of steam at 100°C must be mixed with 341 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 57.0°C? The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg, and the latent ...
April 15, 2011

physics
The average rate at which energy is conducted outward through the ground surface in a certain region is 51.6 mW/m2, and the average thermal conductivity of the near-surface rocks is 3.31 W/m·K. Assuming a surface temperature of 11.7°C, find the temperature (in ...
April 14, 2011

math
thanks! i really appreciate this :)
April 10, 2011

math
simplify: 1. a^2b^-3 2. (5/3)^-3 3. (a^2b^0c)^0 4. x^-2y^3 5. 3x^-2 6. n^2/n^-3 please help!!
April 10, 2011

Tech401
How the internet policies of some countries may affect a company's ability to expand globally?
April 9, 2011

mathematics
area is length x width so what times what equals 25? 5
April 7, 2011

Physics
r=(v^2)/("mu"g)
April 6, 2011

chemistry
what is the concentration, in % m/m of a solution prepared from 50.0g sodium chloride and 150.0g of water
April 5, 2011

Math
How would I solve this...I don't get it. Two solutions of an equation are (6,5) and (8,5). What could the equation be?
April 3, 2011

phyiscs
Two persons watch the same object move john says that it accelerate straight downward, but Samantha claims that it falls Along curved path.describe the conditions under which each person would be reporting correctly what they see. Thanks and please please please answer this ...
April 1, 2011

physics urgent
yes mr.pursley
April 1, 2011

physics urgent
an airplane is flying horizontally over ocean at the speed of 200 meters/seconds and at the altiude of 2000 meters.the pilot drops a flare. A. how many second after release does the flare hit the water? b.At what distance from point p,directly under point of release does the ...
April 1, 2011

chemistry
when 52 moles of benzene combine with oxgen, how many moles of carbon dioxide are produced? what else is produced in addtion to the carbon dioxide
March 31, 2011

math
Sa
March 31, 2011

4th grade math
Name the top view, front view, side view of a cone
March 28, 2011

statistics
an average of 0.56 defects per 500 yards. Using the Poisson formula, find the probability that the number of defects in a given 500-yard piece of this fabric will be more than 3
March 22, 2011

early childhood ed
a childs observation of a parent writing a grocery list, his recognition of the coca cola logo, and his leafing through mailbox advertising literature exemplify. answers 1. cultural imprints 2. autonomous language 3. literacy events 4. mastery of decontexualized language my ...
March 20, 2011

geometry
The perimeter of a kite is 24 I'm tring to find the the sides the kite 4cm less than 3 times the length of another
March 17, 2011

Algebra
Find the polynomial function P of the lowest possible degree, having real coefficients, with the given zeros. 3+2i, -2 and 1
March 10, 2011

Liberal Arts Math
what is k(p)= (p+3)(p-7)
March 9, 2011

Chemistry
What is the molarity of CuCl2 solution that completely reacts with 10.0g of zinc , if the volume of the solution is 360mls? Zn(s) + CuCl2(aq) ¨ ZnCl2(aq) + Cu(s) A. 0.42 B. 0.00021 C. 0.21 D. none of these
March 5, 2011

statistics
Five percent of all items sold by a mail-order company are returned by customers for a refund. Find the probability that of two items sold during a given hour by this company both will be returned for a refund
February 28, 2011

statistics
Five percent of all items sold by a mail-order company are returned by customers for a refund. Find the probability that of two items sold during a given hour by this company both will be returned for a refund
February 28, 2011

statistics
an average of 0.56 defects per 500 yards. Using the Poisson formula, find the probability that the number of defects in a given 500-yard piece of this fabric will be more than 3
February 28, 2011

statistics
Five percent of all items sold by a mail-order company are returned by customers for a refund. Find the probability that of two items sold during a given hour by this company both will be returned for a refund
February 28, 2011

math
The altitude of a triangle is increasing at a rate of 3 centimeters/minute while the area of the triangle is increasing at a rate of 7 square centimeters/minute. At what rate is the base of the triangle changing when the altitude is 22 centimeters and the area is 66 square ...
February 23, 2011

social studies
how did the spanish differ from the portugese in searching for a route to asia
February 17, 2011

THE AGE OF DISCOVERY TO THE AMERICAN EXPERIMENT
its ur ass
February 16, 2011

math
how much force is need to split a 20" x 20" green hedge log?
February 15, 2011

english
Write one paragraph of at least 200-words explaining what the student could have done differently to avoid the plagiarism concerns raised by the faculty member. How could the use of Plagiarism Checker have helped the student?
February 15, 2011

psychology
what is the design, purpose and the limits of an I.Q test?
February 13, 2011

Physics
A car drove a total 5km. Accelerated 10seconds then had a constant velocity. Entire trip was 45 seconds. Was was the initial acceleration and final velocity?
January 31, 2011

Physics
A car drove a total 5km. Accelerated 10seconds then had a constant velocity. Entire trip was 45 seconds. Was was the initial acceleration and final velocity?
January 31, 2011

Algebra
A model train is made by connecting cars with possible lengths of 2 inches and 5 inches. what is the number of inches in the greatest impossible whole-number length of such a train?
January 22, 2011

chemistry
how much lithium hydroxide will be needed to remove 75.0 grams of carbon dioxide?
January 21, 2011

algebra
Sam has $50 in the bank. He deposits $5 each week and does not withdraw any money. How much will he have in his account in w weeks?
January 18, 2011

Chemistry
Mass of flask = 81.39g Mass of flask and water = 104.26g Mass of flask ,water,and solute =129.53 Mass of solute= 25.27g Boiling point of water =98.7C Boiling point of solution =109.5C Calculate the molecular weight of the solute using the data. M=Kb*r solute/delta Tb*kg ...
January 10, 2011

algebra
y+x=-9
January 4, 2011

algebra
slope x=-6
January 4, 2011

algebra
6+9x<42
January 4, 2011

algebra
solve -10<=3x-5<=-4
January 4, 2011

economics PLEASE HELP
According to the permanent income hypothesis, households will tend to react to a temporary tax cut by
December 20, 2010

geometry
Triangle ABC is an isosceles triangle, where angle B is the vertex angle. If BC = 10x-4 , AC= 2x+18 , and AB= 6x+32, find the value of x.
December 15, 2010

calc
construct an isoceles triangle with an area of 100. what is the length of the base of the triangle which has the smallest perimeter? Prepping for a test, explanations please
December 9, 2010

physics
A convex mirror with a radius of curvature of 10 cm (C=10 cm) produces a virtual image 1/3 the size of the real object. What is the object's distance?
December 3, 2010

Chemistry
A 15.0% (by mass) NaCl solution is available.. Determine what mass of solution should be used to obtain a. 2.50 mole of NaCl b. 25.0 g/mol of NaCl
December 2, 2010

math
A square room has perimeter of 32 feet. How. Many many square floor tiles with sides 1 foot long are needed to cover floor
November 30, 2010

Physics
An amusement ride consists of a large horizontal circular platform turning at 12 rpm. People attempt to sit on this platform without slipping toward the outer edge. The coefficient of static friction is 0.15. Determine the distance from the center of the platform that a 150-...
November 30, 2010

us history
The Mayflower compact is an example of which concept?
November 29, 2010

algebra
solve using the multiplication principle.
November 28, 2010

Math
My teacher gave us a puzzle. I have worked on it for 2 hours with both my parents and they can not figure it out. 0 o 0 o 0 o 0 o 0 In the above there are 5 squares. Top left, top right, bottom left and bottom right, and the last one formed by the o's diagaonally. Arrange ...
November 22, 2010

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?
November 21, 2010

college chemistry
10.0 mL of 0.15M of sulfuric acid is titrated with 0.05M of sodium hydroxide. how many mL of sodium hydroxide solution are required to reach the equivalence point?
November 17, 2010

college chemistry
10.0 mL of 0.15M of sulfuric acid is titrated with 0.05M of sodium hydroxide. how many mL of sodium hydroxide solution are required to reach the equivalence point?
November 17, 2010

chemistry
10.0 mL of 0.15M of sulfuric acid is titrated with 0.05M of sodium hydroxide. how many mL of sodium hydroxide solution are required to reach the equivalence point?
November 17, 2010

chemistry
10.0 mL of 0.15M of sulfuric acid is titrated with 0.05M of sodium hydroxide. how many mL of sodium hydroxide solution are required to reach the equivalence point?
November 17, 2010

physics please help
A 8.6 kg board is wedged into a corner and held by a spring at a 50.0° angle, as the drawing shows. The spring has a spring constant of 186 N/m and is parallel to the floor. Find the amount by which the spring is stretched from its unstrained length.
November 16, 2010

Physics
A ski gondola is connected to the top of a hill by a steel cable of length 620 m and diameter 1.5 cm. As the gondola comes to the end of its run, it bumps into the terminal and sends a wave pulse along the cable. It is observed that it took 14 s for the pulse to travel the ...
November 10, 2010

Physics
A mass of 1.66 kg stretches a vertical spring 0.312 m. If the spring is stretched an additional 0.136 m and released, how long does it take to reach the (new) equilibrium position again?
November 10, 2010

Science
How many atoms of aluminum can be produced by the decomposition of 47.1 g of Al2O3? (Hint: Write and balance the equation first.) The products are oxygen gas and aluminum metal (Al) A) 1.11 X 10^24 Al atoms B) None of these C) 1.39 X 10^23 Al atoms D) 5.56 X 10^23 Al atoms E) ...
November 10, 2010

physics
A 0.01-kg baseball traveling in a horizontal direction with a speed of 12 m/s hits a bat and is popped straight up with a speed of 15 m/s. (a) What is the change in momentum (magnitude and direction) of the baseball? (b) If the bat was in contact with the ball for 26 ms, what ...
November 9, 2010

physics
An object of mass 4.3 kg is projected into the air at a 45° angle. It hits the ground 3.8 s later. What is its change in momentum while it is in the air? Ignore air resistance.
November 9, 2010

physics
A 0.105 kg baseball is thrown upward with an initial speed of 12.0 m/s. (a) What is the force on the ball when it reaches half of its maximum height? (b) What is the force on the ball when it reaches its peak?
November 6, 2010

physics
its not 9.8 or 9.81, ive already tried that
November 5, 2010

physics
A 2.22 kg book is dropped from a height of +3.2 m. What is its acceleration? can you help?
November 5, 2010

Calculus
Your problem doesn't state the original population, so you need to rephrase your homework question to give all the information. You can use a program like Winplot to plot this function, and pick off the relevant data.
November 5, 2010

calculus
Lim= x-Infinite x+0/(x2+1)=? please show work
November 3, 2010

Physics
never mind, found the mistake I was making.
October 29, 2010

Physics
Using the definition of the scalar product, find the angles between the following pairs of vectors. A = - 4 i + 2 j + 2 k and B = - 3 j - 3 k I understand to do [(A).(B)]/|A|*|B| = cos theta; but I'm getting 0 for |A| and don't know how to access it from there.
October 29, 2010

calculus
A particle moves along the curve y=square sqrt 1+x^3. As it reaches the point (2,3), the y-coordinate is increasing ata a rate of 4cm/s. How fast is the x-coordinate of the point changing at that instant?
October 25, 2010

physics
73.5 miles south
October 22, 2010

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