Tuesday

April 21, 2015

April 21, 2015

Total # Posts: 580

**chemistry**

When magnesium is burnt completely in air the totol mass of the product was found to be grater than the original mass of the piece of magnesium.explain
*June 14, 2011*

**statistics**

A certain geneticist is interested in the proportion of males and females in the population that have a certain minor blood disorder. In a random sample of 1500 males, 75 are found to have disorder, whereas 80 of 2000 females appear to have disorder. Find a 90% confidence ...
*June 3, 2011*

**statistics**

It is claimed that an automobile is driven on the average more than 20,000 kilometers per year. Random sample of 10 automobile owners are asked to keep a record of the kilometers they travel. If the sample mean and standard deviation of automobile driven are found to be 23,500...
*June 3, 2011*

**statistics**

A sample of 25 men has a mean weight of 65kg with standard deviation of 8kg. Suppose that the weight of men follows normal distribution with a standard deviation of 10kg. Find a 95% confidence interval for the population mean μ.
*June 3, 2011*

**statistics**

If 50% of the automobiles sold by an agency for a certain car are equipped with diesel engines, let X represent the number of diesel models among the next 5 cars sold by this agency, write the probability distribution of X.
*June 3, 2011*

**MATH**

553seven x 5seven
*May 17, 2011*

**math**

it costs $.20a min for ashley to call her best friend in mexico she calls her after school every day she called her friend @ 3:30 yesterday the cost was $8.60 what time did she end her call explain
*May 10, 2011*

**university**

Compare and contrast packet and circuit switching in 250 to 300 words. Which is more commonly used? What are the advantages and disadvantages of each?
*May 9, 2011*

**science**

what is the chemical equation for sodium nitrate?
*May 8, 2011*

**Calc**

this service is so nice make engineering services to coming education learning
*May 3, 2011*

**Trigonometry:Angles of Elevation and Depression**

Carlos is making some observations from the roof of a building. Which angle is the angle of depression from Carlos to the car?
*May 1, 2011*

**math**

what is tan p,out of p,8,q,6,r,and 10,in a fraction form?
*April 21, 2011*

**Math**

In a fish tank, there are two fewer blue fish than three times the number of yellow fish. If there are 10 blue fish, what is the number of yellow fish(n). Write an equation to solve for n.
*April 18, 2011*

**pre cal**

assume the angle is in the first quadrant, and sin theta equals 1/5. what is sin 2 theta?
*April 17, 2011*

**math**

simplify and state the restrictions of a^2- 9b^2 / 5a^2-11ab-12b^2
*March 27, 2011*

**science**

Calculate the molarity of each solution. a) 1.0 mol KCl in 750 mL of solution b) 0.50 mol MgCl2 in 1.5 L of solution
*March 24, 2011*

**computer science**

please write this in C. Thanks
*March 4, 2011*

**computer science**

n insurance company wants to offer a new 5-year, level-term life insurance policy to recent college graduates. The policy will have a face value (the amount paid in case of death) of $50,000. Normally, the company charges different premiums depending on the age, gender, ...
*March 4, 2011*

**physics**

Batman, whose mass is 119 kg, is holding on to the free end of a 14.6 m rope, the other end of which is fixed to a tree limb above. He is able to get the rope in motion as only Batman knows how, eventually getting it to swing enough that he can reach a ledge when the rope ...
*February 25, 2011*

**MATH**

how many one-inch square tiles will he need to cover a surface that is 2ft by 3ft
*February 24, 2011*

**algebra**

Josh hit a baseball straight up into the air. The equation below describes the height of the ball (h), in meters, as a function of time (t) in seconds. h(t) = -9.8t² + 30t + 1.5
*February 16, 2011*

**physcis**

In the diagram shown the pulley at frictionless and the cylindrical load weighs 800. A. Determine the tension in the cable. B. Determine the horizontal component of the reaction of the pin A. C. Determine the vertical component of the reaction of the pin A.
*February 3, 2011*

**Algebra 2**

A Rectangular Field is to be enclosed by a fence and divided into three parts by another fencer. Find the maximum area that can be enclosed and separated i this way with 500 meters of fencing
*February 3, 2011*

**American History**

How did the pattern of European immigration shift in 1890?
*January 30, 2011*

**physics**

a hockey puck rebounds from a board. the puck is in contact with the board for 2.5 ms. dertermine the acceleration of the puck over the time interval. V(i) = 26 m/s...at angle of 22 degrees. V(f) = 21 m/s...at angle of 22 degrees. a=?
*January 27, 2011*

**physics**

Two point sources, 5.0 cm apart are operating in phase, with a common frequency of 6.0 Hz, in a ripple tank. A metre stick is placed above the water, parallel to the line joining the sources. The first nodal lines (the ones adjacent to the central axis) cross the metre stick ...
*January 16, 2011*

**geometry**

if the length of RS is 12 and the length of ST is 13 , which of the following could be the length of RT ? A> 24 , B> 26 , C> 28 , D> 29 E> 30
*January 15, 2011*

**Law and ethics in allied health**

ive been trying to figure this question out for 20 minutes.. if you could help me that would be great. - Dennis, a new medical assistant at Dr. Hernandez's office, notices that Beth has been waiting over an hour to get an allergy shot. Dennis has never given a shot before...
*January 13, 2011*

**physics**

Two point charges, +3.63 µC and -5.95 µC, are separated by 1.18 m. What is the electric potential midway between them?
*January 12, 2011*

**Physics**

A particle has a charge of +1.5 µC and moves from point A to point B, a distance of 0.18 m. The particle experiences a constant electric force, and its motion is along the line of action of the force. The difference between the particle's electric potential energy at...
*January 12, 2011*

**Physics 11th Grade**

the total kg would be 85 kg. then multiply by 9.8 to find fg. to lose weight he has to have a downward acceleration ( push downwards on a countertop while standing on the scale).
*January 9, 2011*

**Math/Trig**

Write an equation for a cosine function with an amplitude of 2/3 , a period of pi, and a vertical shift of 2 units up.
*January 4, 2011*

**physics**

thank you. this was very helpful.
*January 1, 2011*

**physics**

thank you for responding: i did: (9.0*10^9)cos30((4.0*10^-6)^2)/(0.2^2) using this i got 3.1. so then i need to double it because it's two spheres. right? and sorry about the formula in the question. i confused my self with the "times" and "exponent".
*January 1, 2011*

**physics**

Three spheres, each with a negative chrge of 4.0x10^6C, are fixed at the vertices of an equilateral triangle whose sides are 0.20 m long. Calculate the magnitude and direction of the net electric force on each spehere. i used this: (K)Cos30((4.0*10-6)*2)/(0.2*2) and i get 3.1 ...
*January 1, 2011*

**physics**

Three spheres, each with a negative chrge of 4.0x10^6C, are fixed at the vertices of an equilateral triangle whose sides are 0.20 m long. Calculate the magnitude and direction of the net electric force on each spehere. i used this: (K)Cos30((4.0*10-6)*2)/(0.2*2) and i get 3.1 ...
*January 1, 2011*

**physics**

Three spheres, each with a negative chrge of 4.0x10^6C, are fixed at the vertices of an equilateral triangle whose sides are 0.20 m long. Calculate the magnitude and direction of the net electric force on each spehere. i used this: (K)Cos30((4.0*10-6)*2)/(0.2*2) and i get 3.1 ...
*January 1, 2011*

**Science 6th grade**

What is the best way to tell a chemical change has taken place? 1. The matter changes color 2. The mixture separates into layers 3. The composition chnages
*December 30, 2010*

**finance**

Harvard Group Case Analysis Foreign Exchange Hedging Strategies at General Motors: Transactional and Translational Exposures
*December 19, 2010*

**11th grade math**

Using the formula 4.9t^2... A object is dropped how long will it take it to fall 92 meters
*December 16, 2010*

**chemistry**

my moth balls froze at 54 degrees celsius, what kind are they?
*December 15, 2010*

**business comunication **

write an application in response to an advertisement in the daily dawn for the post of manager hrm in sony electric lahore
*December 6, 2010*

**HISTORY**

what is the official currency of the united states?
*December 2, 2010*

**algebra**

set up an equation, slope-intercept might help!
*December 2, 2010*

**physics**

db = 10log(p2/p1) = 5. 10log(p2/p1) = 5, Divide both sides by 10: log(p2/p1) = 0.5, p2/p1 = 10^0.5 = 3.16.
*December 1, 2010*

**statistics**

an experiment consists of 4 tosses of a coin.denoting the outcomes HHTH,THTT,..and assuming that all 16 outcomes are equally likely, find the probability distribution for the total number of heads.
*November 21, 2010*

**vocab**

intermenttently what does this word mean
*November 19, 2010*

**language arts**

thanks
*November 19, 2010*

**language arts**

What is the sense of the word "starts" in the sentence below? By doing this she starts something she did not know was going to happen. Is the answer intermenttently?
*November 19, 2010*

**math**

The longest steel arch bridge is the new river gorge near fayetteville,west virginia. write an inequality that describes the length in feet ,1, of every other steel arch bridge. the new river gorge bridge is 1700 feet long.
*November 16, 2010*

**Statistics**

Assume a population of any 4 numbers(suppose: 4,8,15,19). Select a random sample of size 2 with replacement from the population. List all the possible samples and their corresponding values of x̄ “x-bar” and then find the probability distribution of “X-bar...
*November 16, 2010*

**chemistry**

A sample of carboxylic acid is added to 50.0 mL of 2.27 M NaOH and the excess NaOH required 28.7 mL of 1.86 M HCl for neutralization. How many moles of NaOH reacted with the carboxylic acid?
*November 11, 2010*

**12 Math**

Graph the results of a coin toss: Toss Coins 0 20 1 12 2 5 3 1 4 0 State an equation that best fits the results (use n to represent the number of the toss). What physical phenomenon does this model? I was able to graph this, I just do not understand how to write the equation, ...
*November 10, 2010*

**language arts**

ill try
*November 8, 2010*

**language arts**

i just remembered it was main idea, purpose, and intent
*November 8, 2010*

**language arts**

thank you
*November 8, 2010*

**language arts**

what are three major parts of a summary?
*November 8, 2010*

**Math**

collect like terms and substitute 0for y? i think im just now doing this in my senior year in middle school algebra1
*November 8, 2010*

**pre algebra**

try to set up an equation im in algebra 2 so i may be able to help you
*November 8, 2010*

**geometry**

are the sides decimal?
*November 8, 2010*

**pscyhology**

technolly no one can tell you becuase its a test but lets just say its not a test they all look right
*November 8, 2010*

**math **

Hint: set up an equatoin
*November 8, 2010*

**Graph help!**

Sketch y= -(1/4) (2)^(x-4)+5 I know that the basic equation is y=2^x so is the graph translated 4 units right, vertically stretched by a factor of (1/4), reflected on the x-axis and translated up 5?
*November 8, 2010*

**check math question**

Thank you!
*November 8, 2010*

**check math question**

Given y=2^x Predict the equation for the graph that has been reflected in the y-axis, given a vertical stretch by a factor of 5, translated 2 units right and 5 units down. I have: y= -5 (2) ^ (x-2) - 5 Is this correct?
*November 8, 2010*

**Graphing**

Sketch y= -(1/4)(2)^(x-4)+5 by first including a table describing its major features.
*November 8, 2010*

**Math Graph**

Sketch y= -(1/4)(2)^(x-4)+5 by first including a table describing its major features.
*November 8, 2010*

**math**

In a Geometric progression the sum of its first 4 term is equal 15, and the sum of the next term is equal to 15/16. find its first term and its common ratio
*November 5, 2010*

**math**

in an arithmetic progression the 50th term is equal to 3, and the sum of the first 8th is equal to 23. find the first term and the common difference
*November 5, 2010*

**math**

a rubber ball fell from a high of 16 feet and then its rebounded until it rested, such that each time it rebounded to a high =1/2 the high rebounded to previouslly a) find the high rebounded to after the 10th term b)find the distance cover by the ball before it rested
*November 5, 2010*

**math**

If the sum of the first and the second terms of an infinite Geometric progression is equal to 3/8, and the sum of its term is equal to 1/2. find the common ratio of the first term of the progression
*November 5, 2010*

**math**

in a Geometric progression the sum of the first and the second terms is 90 and the sum of the second and the fourth terms is equal to 30.find the sum of the first 8th term in the progression
*November 5, 2010*

**math**

find the sum of the first 8th term of the Geometric progression, 1,3,9,27
*November 5, 2010*

**math**

find the sum of the 20th term a=6 and r=2/3
*November 3, 2010*

**Math**

My ones digit is 5 more than the tens digit. i am greater than 25 and less than 35.
*November 2, 2010*

**Calculus - integration**

integration1-e integration 0-lnx y dy dx
*November 1, 2010*

**graphing**

How do you graph y= -log (base 5)(-x)? The written question is: Sketch above equation by first describing the transformations performed on the equation y= log (base 5)(x) And what is the inverse function? x=log (base 5)(y)?
*November 1, 2010*

**Chemistry**

and the Ksp as well im so lost! :(
*November 1, 2010*

**Chemistry**

what is the solubility of Pb(NO3)2, PbCl2, PbCrO4, and PbS from highest to lowest
*November 1, 2010*

**log equation graph**

How do you graph y= -log (base 5)(-x)? The written question is: Sketch above equation by first describing the transformations performed on the equation y= log (base 5)(x) And what is the inverse function? x=log (base 5)(y)?
*November 1, 2010*

**Simplify exponents**

(x^ a+b) ^ (a-b) / (x^a-2b) ^ (a+2b)
*November 1, 2010*

**log graph**

How do you graph y= -log (base 5)(-x)? The written question is: Sketch above equation by first describing the transformations performed on the equation y= log (base 5)(x) And what is the inverse function? x=log (base 5)(y)?
*November 1, 2010*

**equation of exp function**

What equation has the following features: It has the x-axis as an asymptote and it passes through (0, -1), (-1,-3) and (-2,-9)?
*November 1, 2010*

**Simplify exponents**

Sorry! (x^ a+b) ^ (a-b) / (x^a-2b) ^ (a+2b)
*November 1, 2010*

**Simplify exponents**

How do you simplify this equation: (x^a+b)^a-b / (x^a-2b) ^ a+2b
*November 1, 2010*

**neg exponents**

How do you write: -1/9 x^-1 with a positive exponent? also, -5 x^-2 ??
*November 1, 2010*

**inverse equation**

The same equation, just simply switched: if you have x+y= b, the inverse is y+x=b, which is the same thing and therefore its own inverse? Thank you!
*November 1, 2010*

**inverse equation**

How is any equation of the form y= -x + b its own inverse?
*November 1, 2010*

**logs 3**

How do you create a table to graph log (3/2) x ???
*November 1, 2010*

**Richter scale question**

I'm sorry, I'm still confused. Is it something like log(2) 6.1??
*November 1, 2010*

**Richter scale question**

I was not given any information regarding these factors, I wrote out the question I was given
*November 1, 2010*

**Richter scale question**

An earthquake registers 6.1 on the richter scale. What is the rating on an earthquake twice as powerful? I know: M=I/Io Then what do you do?
*November 1, 2010*

**logs 2**

How do you solve log(5) 20 + log (5) 10 - 3log(5) 2?
*November 1, 2010*

**logs**

How do you solve: log (1/3) 1 ?
*November 1, 2010*

**Advanced Functions 2**

I'm sorry for not using grouping symbols! You are correct, the exponents are (a-b) and (a-2b)
*November 1, 2010*

**Advanced Functions 2**

How do you simplify (x^a+b)^a-b / (x^a-2b) ^ a+2b
*November 1, 2010*

**Advanced Functions**

How do you write -1/9 x^-1 with a positive exponent? also, -5 x^-2 ??
*November 1, 2010*

**physics**

A cart starts from position one with a velocity of 17.0 m/s. Find the speed of the cart at positions 2 and 3 ignoring friction. will the cart reach position four? position 2= 12.0 m high position 3= 2.0 m high 4= 20.m high
*October 26, 2010*

**College Physics**

A 75.0 kg ladder that is 3.00 m in length is placed against a wall at an angle theta. The center of gravity of the ladder is at a point 1.20 m from the base of the ladder. The coefficient of static friction at the base of the ladder is 0.800. There is no friction between the ...
*October 25, 2010*