Wednesday
October 1, 2014

Posts by TOM


Total # Posts: 1,077

chemistry
how do u find the percantage composition of an element?
December 11, 2013

math
Thanks Steve, but what is the reason for minus 120 and not plus 120?
December 7, 2013

math
A ferris wheel has diameter of 24 m and is 4 m above ground level at its lowest point. Assume that a rider enters a car from a platform that is 30^0 around the rim before the car reaches its lowest point. Model the rider's height above the ground versus angle using a ...
December 7, 2013

math
ken spend 1/5 of his money on a dictionary. he gives $21 to his brother and has 1/2 of his money left. how much money does ken have left?
November 30, 2013

currerent amd magnetism
An Aluminium wire of 1mm diammeter below the critical temperature of 1.2 K. iTS CRITICAL MAGNETIC FIELD IS 0.01t, What is the maximum current in Amperes that you can send down the wire for it to remain superconducting? what formular can I use to solve this? someone please help.
November 28, 2013

Physics
A model rocket blasts off from the ground, rising straight upward with a constant acceleration that has a magnitude of 92.9 m/s2 for 1.85 seconds, at which point its fuel abruptly runs out. Air resistance has no effect on its flight. What maximum altitude (above the ground) ...
November 20, 2013

Math
School is planning to purchase a new copy machine. The principal has narrowed the choice to two models. Superfast Deluxe and Quick Copies. He plans to purchase the machine that copies the quickest rate. Use this info to determine which one is faster. Quick copies: c=1.5t where...
November 18, 2013

math
sally and marta had the same number of postards. after sally sold 18 postards, marta had 4 times as many as sally. how many ostcards did eeach girl have to begin with
November 18, 2013

Physics
A block of mass m1 = 4.90 kg sits on top of a second block of mass m2 = 14.5 kg, which in turn is on a horizontal table. The coefficients of friction between the two blocks are µs = 0.300 and µk = 0.100. The coefficients of friction between the lower block and the ...
November 16, 2013

Physics
A train traveling at a speed of 110 km/h uniformly decelerates for 20 seconds. During that time it travels 450 m. a. What is the acceleration ? = m/s2 b. What is its speed after the deceleration ? = km/h
November 8, 2013

Physics
A crowbar is 4.000 metres long and has its pivot 50.000 centimetres from one end. A force of 2000.000 newtons is applied to the end closest to the pivot. What effort must be applied to the other end of the crowbar to keep it in equilibrium? (Round to 3 decimal places)
November 1, 2013

statistics
Forty-four percent of customers who visit a department store make a purchase. The probability, rounded to four decimal places, that in a random sample of 9 customers who will visit this department store, exactly 6 will make a purchase is:
October 27, 2013

statistics
Forty-four percent of customers who visit a department store make a purchase. The probability, rounded to four decimal places, that in a random sample of 9 customers who will visit this department store, exactly 6 will make a purchase is:
October 27, 2013

Math
cos 2(pi/4 + x) = ?
October 17, 2013

10th us history
Why did the British fight with the Indians?
October 16, 2013

criminal justuce
what are the current administration's policies related to crime? I can not find this information, all I can find is articles about drugs
October 5, 2013

physics
In the apparatus shown in the figure (Figure 1) , m1 = 10kg and the coefficients of static and kinetic friction between m1 and the table are 0.69 and 0.32, respectively. Part A What mass of m2 will just barely set the system in motion?
October 3, 2013

criminal Justice
Thank you, but where can I find this information. I understand Rational theory is based on the assumptions that people choose their behaviors freely and are motivated by avoiding pain and the pursuit of pleasure. I just can not find information on how criminal justice ...
September 29, 2013

criminal Justice
Please help me figure out what I am searching for in this question. •Discuss your first theory(Rational Theory) and how criminal justice responses may be formed based on the assumptions of this theory.
September 29, 2013

SS
Ms.Sue he just said it was a province. It is like a state.
September 24, 2013

SS
It is basically like a state in the U.S.
September 24, 2013

math
Yanira is 3 years older than Tim and twice as old as Hannah. Tim is 2 years older than Hannah. How old are Yanira Tim and Hannah? Explain how you did the problem and the answer. math 7 accelerated - tom, Tuesday, September 24, 2013 at 6:46pm Ms. Sue thanks for the help. I ...
September 24, 2013

math 7 accelerated
Yanira is 3 years older than Tim and twice as old as Hannah. Tim is 2 years older than Hannah. How old are Yanira Tim and Hannah? Explain how you did the problem and the answer.
September 24, 2013

Literature
A method of humorous or subtly sarcastic expression which is used to explain the direct opposite of what a word means or what actually happens in a story.
September 23, 2013

arithmetic
28,000 X .05% compounded for 33 years =
September 19, 2013

math
3.
September 17, 2013

math
(-4)-9=5 12-5=7
September 17, 2013

math
-4.
September 17, 2013

math
Well first you need to do whats inside the parentheses first because of order of operations. Lets take the denominator (top half) first. 4(2+1)^2 2=1=3 3^2=9 9x4=36 _______ Now take the second half. (1)^2= 1 3x1=3 Now since it's in a fraction from 36 over 3, you simply ...
September 17, 2013

math
200/50=4
September 17, 2013

math
3.
September 17, 2013

math
0.75/3.00=0.25 (1/4)
September 17, 2013

accelerated math
If you were to distribute 5(2+3), would you get 5(2)+ 3(5)?
September 17, 2013

Physics
Use Einstein's theory. e=mc^2.
September 17, 2013

math
I wait i'm sorry 2/5. (Same thing).
September 17, 2013

math
6/15
September 17, 2013

7th Grade
Deoxyribonucleic acid
September 16, 2013

Math
11/12-3/4=11/12-9/12=2/12=1/6..
September 12, 2013

Math
79/8 + 23/8 + 0 = = 51/4 + 0 = = 51/4 = 12 3/4
September 12, 2013

Math
Ok Im not that good at math so thats why I asked but thanks
September 9, 2013

Math
opposite of negative 31?
September 9, 2013

Math
If the following integers were plotted on a number line with twenty-five, which integer would appear on the same side of zero and have a greater distance from zero? 1. opposite of eighteen 2. negative one 3. opposite of negative thirty-one 4. twenty-four
September 9, 2013

English
Pope Tawadros the second
August 23, 2013

statistics
In a poll of 700 selected people in the USA who are 50 years or older, 20% said they would prefer a complete overhauling of the social security system. Estimate the population proportion of the USA of 50 years or older who would prefer a complete overhauling of the social ...
July 30, 2013

statistics
It is claimed the average age of employee in a large company is 50. A sample of 36 employees is taken and the average age was 49. The standard deviation of the population was 5. Use a level of significance of .05. What do you think of this claim?
July 30, 2013

Math-probability
There are 8 standard classifications of blood type. An examination for prospective laboratory technicians consists of having each candidate determine the type for 3 blood samples. How many different examinations can be given of no 2 of the samples provided for the candidate ...
July 28, 2013

Math
Given f(x) = 2 cos[3(x - 60)]+4. Graph one complete cycle of the above function when -180<x<180.
July 24, 2013

Chemistry
How many liters of hydrogen needs to be reacted with chlorine to produce 21g of hydrochloric acid, at STP?
July 21, 2013

Math
The third term of a geometric series is 24 and the fourth term is 36. Determine the first term and common ratio.
July 18, 2013

math
(-16)^-2/3
July 16, 2013

Physics
A material that remains highly magnetized after a magnetization cycle has a large hysteresis area. Answer True False
July 16, 2013

Physics
In a magnetization cycle, a large hysteresis loop indicates ____. Answer the material is nonmagnetic a large amount of energy loss due to heating the size of the material is large the material will not remain well magnetized
July 16, 2013

Physics
The flux through a window whose surface is parallel to magnetic field lines is zero. Answer True False
July 16, 2013

Physics
A proton is traveling horizontally at 5.4 × 106 m/s in a direction 45o north of west. A magnetic flux density has a magnitude of 0.25 T and is directed north. What is the force on the proton? Answer 1.5 × 10-13 N, up 2.1 × 10-13 N, down 1.5 × 10-13 N, ...
July 16, 2013

Physics
A charged particle is projected into a uniform B-field. Its velocity vector is perpendicular to the B-field vector. What type of path will the particle travel? Neglect gravity. Answer straight line motion elliptical motion parabolic motion circular motion
July 16, 2013

Physics
A man stands underneath a power line carrying a current of 150 A. If the power line is 15 m above the man, what is the magnetic flux density measured by the man (Neglect the Earth's magnetic field).
July 16, 2013

Physics
You have a piece of copper with a volume of 2 cm3, and wish to form a wire having a resistance of 0.15 ƒ¶. How long should the wire be if the resistivity of copper is 1.72 ~ 10-8 ƒ¶. m?
July 15, 2013

7th grade english
The book A Child Called “It” is about the struggle of a young boy named David Pelzer who was severely emotionally and physically abused by his alcoholic mother Catherine Rovera. From being abused along to being emotionally abused to the point where David Pelzer was ...
July 14, 2013

physics
A small cylinder rests on a circular turntable that is rotating clockwise at a constant speed. The cylinder is at a distance of r = 12 cm from the center of the turntable. The coefficient of static friction between the bottom of the cylinder and the surface of the turntable is...
July 10, 2013

Python Help
The issue im having is with creating the invoice. The total charges and local taxes continues to error out
July 3, 2013

ITE
If you drag a file into a compressed folder, it is ________ to that folder.
June 24, 2013

math
Alicia Eastman deposited $2,000 in a savings account at the Biltmore Bank paying 6% ordinary interest. How many years will it take for her investment to amount to $2,600?
June 22, 2013

Math
Alvin, Calvin and Melvin are running laps around a track. Alvin runs a lap every 4 minutes, Calvin runs a lap every 6 minutes and Melvin runs a lap every 9 minutes. If they start off at the same point, how many minutes will it take before all three of them are back at the ...
June 11, 2013

math help mepls
180
June 7, 2013

heeeeeeeeeeelp math
90
June 6, 2013

statistics
Test the following function to determine whether it is a probability function. If it is not, then make it into a probability function. (Give your answers correct to one decimal place.) R(x) = 0.2, for x = 0, 1, 2, 3, 4 (a) List the distribution of probabilities. R(0) = R(1) = ...
May 29, 2013

math
Sorry, but this is the way it is written, that is why I do not understand it.
May 29, 2013

math
I don't know, is the answer 5-10=5 for mean????
May 29, 2013

math
Consider the probability function. (Give your answers exactly.) P(x) = 5 − x 10 , for x = 1, 2, 3, 4 (a) Find the mean. (b) Find the standard deviation.
May 29, 2013

Math
Find z, given the following. (Give your answer correct to two decimal places.) x = 56, ì = 45 and ó = 5.3 z =
May 28, 2013

Math
Find the area under the standard normal curve between z = 0.7 and z = 2.15, P(0.7 < z < 2.15). (Give your answer correct to four decimal places.)
May 28, 2013

math
Sorry I hit the wrong one, not sure who this is but it helped me too...you also answered one of my questions and I was saying thank you for it.
May 28, 2013

math
Thank you
May 28, 2013

Statistics answer check
I got 3.48 as the answer
May 27, 2013

Statistics
The survival rate during a risky operation for patients with no other hope of survival is 87%. What is the probability that exactly four of the next five patients survive this operation? (Give your answer correct to three decimal places.)
May 27, 2013

Statistics
Consider the probability function. (Give your answers exactly.) P(x) = 5 − x 10 , for x = 1, 2, 3, 4 (a) Find the mean. (b) Find the standard deviation.
May 27, 2013

Statistics
Test the following function to determine whether it is a probability function. If it is not, then make it into a probability function. (Give your answers correct to one decimal place.) R(x) = 0.2, for x = 0, 1, 2, 3, 4 (a) List the distribution of probabilities. R(0) = R(1) = ...
May 27, 2013

statistics
Find P(A or B). (Give your answer correct to two decimal places.) P(A) = 0.35, P(B) = 0.5, and P(A and B) = 0.18
May 26, 2013

Statistics
I did the same thing that Gayle done on this for x and then y which was both wrong answers.
May 26, 2013

Statistics
No it is written in book as (SS(x), so I have not ideal what to do on this one It ask for three answers in first question and 1 answer in the second part and I have missed all of it and I keep coming up with the same answers so I am not sure what I am doing on this one
May 26, 2013

Statistics
Does studying for an exam pay off? The number of hours studied, x, is compared with the exam grade received, y. x 7 7 5 5 7 y 95 90 75 85 95 (a) Complete the preliminary calculations: SS(x), SS(y), and SS(xy). Incorrect: Your answer is incorrect. . (SS(x)) Incorrect: Your ...
May 26, 2013

statistics
Sorry, did not realize that I had done it twice was working on different problems...thought I had posted another question.
May 26, 2013

statistics
Does studying for an exam pay off? The number of hours studied, x, is compared with the exam grade received, y. x 7 7 5 5 7 y 95 90 75 85 95 (a) Complete the preliminary calculations: SS(x), SS(y), and SS(xy). Incorrect: Your answer is incorrect. . (SS(x)) Incorrect: Your ...
May 26, 2013

math
if the pre-image's perimeter was 104 units, what is the images's perimeter
May 19, 2013

Math (Algebra) (Distance Between 2 Lines)
If real numbers a and b satisfy a^2 + b^2 = 64, what is the distance between the lines ax + by = 1 and ax + by = 417 ?
May 13, 2013

Math (Algebraic Manipulation) Help me please
An operation produces A−1/A from a fraction A= m/n, where m ≠ n and m ≠ 0. If the initial value of A is 24/47 and the operation is repeated 2012 times, the final output is a/b, where a and b are coprime positive integers. What is a+b?
May 13, 2013

Math (Algebra)
If positive integers x and y satisfy the equation xy−5x−10y+43=0, the sum x+y is constant. What is the value of x+y?
May 13, 2013

Math (Algebra) Remainder Theorem
What is the remainder when f(x)=x^2220 + x^2215 + x^2210 + … + x^10 + x^5 + x^0 is divided by x^4 + x^3 + x^2 + x + 1? Note that: x^0 = 1
May 13, 2013

math
Stacey used her 20% discount card to buy 7 cans of tomatoes and 15 cans of mushrooms for $10.64. The next day Brian spent $ 7.21 on 17 cans of tomatoes and 5 cans of mushrooms in a "30% off" sale. Find the undiscounted pre- sale price of each type of can.
May 12, 2013

Math (Calculus) (Implicit Differentiation)
The equation of the line tangent to (x^2+y^2)^4=16x^2y^2 at (x,y)=(−1,1) is ay = bx + c, where a, b and c are positive integers. What is the value of a+b+c?
May 12, 2013

Math (Algebraic Manipulation)
An operation produces A−1/A from a fraction A= m/n, where m ≠ n and m ≠ 0. If the initial value of A is 24/47 and the operation is repeated 2012 times, the final output is a/b, where a and b are coprime positive integers. What is a+b?
May 12, 2013

Math (Algebra) (Distance Between 2 Lines)
If real numbers a and b satisfy a^2 + b^2 = 64, what is the distance between the lines ax + by = 1 and ax + by = 417 ?
May 12, 2013

Math
Sam measured the length of an insect. He found it was between 3 1/2 inches and 3 3/10 inches long. Write a mixed number that could be the length of the insect
May 9, 2013

Math (Trigonometry)
Thank you very much! You're good! :)
May 9, 2013

Math (Trigonometry)
What is the maximum value of [9sinθ+2sin(θ+π/3)]^2?
May 9, 2013

Math (Probability)
Four players are playing a game involving choosing positions on a grid of size 3×8. Each player chooses a random position on the grid, then all players reveal their choices and a token is placed on each of the positions. The probability that the tokens form the vertices ...
May 7, 2013

Math (Percentage)
The price of a hat is reduced by a% from its regular price, and then is raised by a% from the reduced price. If the resulting price is an 81% discount from the regular price, what is a?
May 7, 2013

Math (Trigonometry)
θ is an acute angle such that tan(θ) = 12. What is the value of 5√5⋅(sinθ+cosθ)?
May 7, 2013

Math (Trigonometry)
In triangle ABC, we have AB = 16, BC = 29 and CA = √1097. What is the integer that is closest to 100 sin∠ABC?
May 7, 2013

Science
Identify six renewable (as opposed to depleted) sources of energy.
May 2, 2013

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