Thursday

April 2, 2015

April 2, 2015

Total # Posts: 1,148

**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*

**Math 112**

for either standard form of the parabola, describe what happens to the shape of the parabola as p increases
*April 29, 2013*

**Math**

A rectangular livestock pen with THREE SIDES of fencing is to be built against the barn. The fencing is 1050ft long. Find the dimensions of the maximum area that can be enclosed. What is the maximum area?
*April 23, 2013*

**math**

A child’s kite is on top of a straight pine tree. A ladder is placed against the tree and touches the kite. The ladder forms a 45-degree angle with the flat ground. The base of the tree is 9 feet away from the base of the ladder. With only this information, how can you ...
*April 19, 2013*

**english**

how to do i do good on a ela multiple choice comprehension test. like can you give me some tips?
*April 15, 2013*

**Maths**

The first one can be any color. But after you draw it there will be only 9 of that color left. So the odds of drawing the same color again are 9/39.
*April 15, 2013*

**PHYSICS**

If you need me to show you how i can
*April 14, 2013*

**PHYSICS**

I dont know why that just happened?!
*April 14, 2013*

**PHYSICS**

How are you in sixth grade and doing these questions?! You must be really smart!
*April 14, 2013*

**PHYSICS**

The answer is 7m for the first one and B is yes she will
*April 14, 2013*

**mathematics**

Need help with these: Write the expression as a logarithm of a single quality. a) 3log[base5](a) + 4log[base5](b) - 2log[base5](c) b) 3log(2)-(1/3)log((x)^(2) - 1) I appreciate help.
*April 8, 2013*

**algebra**

Tom decides to make a rectangular desk top from a plywood door that was stored in the basement. The door was 2 feet longer than twice its width. To get the desired size desk he cuts 3 inches off its length and 1/2 foot off its width. If the plywood he cut off had a total area ...
*April 6, 2013*

**math**

find the value of k such that the equation e^(2x)=krootx has exactly one solution.
*April 4, 2013*

**math**

What is the value of u in the following system of linear equations? 4u + 3v = –1 3u + 2v = 1 a) 5 b)-11/2 C)-7 d)19/3
*April 2, 2013*

**math**

What is the value of t in the solution to this systems of linear equations? 2s – 3t = –1 3s – 4t = 0 a)–5 b)3 c)-7/3 d)4
*April 2, 2013*

**math**

What is the value of t in the solution to this systems of linear equations? 2s – 3t = –1 3s – 4t = 0 a)–5 b)3 c)-7/3 d)4
*April 2, 2013*

**la**

do you want our opinion for that?
*April 2, 2013*

**math**

Flight Path. In this problem you will use a cosine function to model the flight path of a plane that begins its descent from 20000 ft when it is 45 miles from the airport. Find the fuction p(x)= ACos(wx)+B that that gives the altitude in ft when the plane is x miles from the ...
*April 2, 2013*

**college algebra**

How much paper would you need to wrap a box 10cm wide, 25cm high, and 50cm long?
*April 2, 2013*

**calculus **

Flight Path. In this problem you will use a cosine function to model the flight path of a plane that begins its descent from 20000 ft when it is 45 miles from the airport. Find the fuction p(x)= ACos(wx)+B that that gives the altitude in ft when the plane is x miles from the ...
*April 1, 2013*

**math**

so there's a total of 15 marbles and there's 6 yellow marbles. thus the probability is 6/15
*April 1, 2013*

**math**

A firm issues bonds with a face value of 1000, a coupon rate of 7% and that will mature in 10 years and the market yield is 10% and pay interest semiannually what is the value. Please help
*March 31, 2013*

**math**

If a company issues bonds with a face value of $1000, a coupon rate of 7%, and that will mature in 10 years. The current market yield is 10%. if the bonds pay interest semiannually, what is the value of the bonds? please he;p with the formula?
*March 30, 2013*

**math**

If I need $25,000 in 4 years. Waht amount must i invest today if the investment earns 12% compounded semiannualy?
*March 30, 2013*

**Calculus 2**

Hello, I don't know what test to use for this series: Determine the sum of the following series: inf E n=1 (2^n + 9^n) / 12^n thank you!
*March 22, 2013*

**am literature**

what does ethos pathos and logos mean
*March 17, 2013*

**Math**

Randy throw a base ball straight upwards, releasing it 6 ft above the round, and giving it an initial speed of v = 128 ft/sec. Use the formula h = -16t^2 + vt + 6 ft( where t = time , h = height ) to find the maximum height of the ball to reach this height.
*March 15, 2013*

**math**

a factory can produce 45 containers of yogurt in t minutes, 950 grams of fruit are used for every 25 containers of yogurt b) find in terms of t the time taken by the factory to produce 100 containers of yogurt c) if t=6 find the amount of fruit used in producing containers of ...
*March 5, 2013*

**maths and physics**

A cannon is placed on a hillside pointing up the hill, where the hill is at an angle a Pi/4 to the horizontal. The cannon points at an angle Pi/6 to the slope. and a shot is red uphill with initial speed v0. (i) Find the maximum value of the distance between the ...
*March 3, 2013*

**physics**

A truck of mass 13,100 kg is acted upon by a driving force of 8900 N. The motion is opposed by a frictional force of 2230 N. Find the acceleration.
*March 3, 2013*

**physics**

20 m/s 2 J
*February 25, 2013*

**calculus 2**

thanks steve!
*February 23, 2013*

**calculus 2**

integrate e^(2x) / (e^(4x) + 9) am I allowed to simplify the e^(2x) with the e^(4x)? Thank you
*February 23, 2013*

**I need help**

this is the Answer jiskha try it
*February 23, 2013*

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