Saturday

May 23, 2015

May 23, 2015

Total # Posts: 703

**statistics**

SAT scores are normally distributed with a mean of 1518 and a standard deviation of 325. What scores correspond to P20 and P65?
*November 27, 2010*

**Physics-HELP PLEASE**

If I'm driving a car and I make a turn to the right, what will happen to a bag of items that is sitting next to me in the car-in terms of inertia, friction and centripetal force I think they will fall the opposite direction but we just started this unit and I don't ...
*November 21, 2010*

**Physics**

If I'm driving a car and I make a turn to the right, what will happen to a bag of items that is sitting next to me in the car-in terms of inertia, friction and centripetal force I think they will fall the opposite direction but why?
*November 21, 2010*

**geometry**

How do I draw an acute scalene triangle with lengths of 8cm, 10cm, and 16cm?
*November 13, 2010*

**science**

Words to use: Accelerate - Sliding - Brake - Friction - Slipping - Inertia Velocity - Wheel - Strength - Static - Terminal velocity Questions 1. An object will ____?____ when the net force is not zero. 2. ____?____ will never speed up an object. 3. The friction that prevents ...
*November 9, 2010*

**similiar figures**

the rul (x,3/4y) is applied to a polygon. Is the image similar to the original polygon?
*November 9, 2010*

**Science**

The gravitational force of any object near Earth is _____? A unknown B friction C Newton's First Law D 9,8m/s2 When you walk across a bridge, the _____ force of the bridge keeps it from breaking. A gravitational B normal C strong D weak A (n) _______________ helps reduce ...
*November 9, 2010*

**similar figures**

The rule (x,3/4y) is applied to a polygon. The given point is on the original polygon. Find the image of the point (6,8)
*November 9, 2010*

**chemistry**

A sample of an unknown gas effuses in 11.5 min. An equal volume of H2 in the same apparatus at the same temperature and pressure effuses in 2.77 min. What is the molar mass of the unknown gas?
*November 1, 2010*

**science..physics**

I'm on a test..don't get me wrong physics is hard. Ha. A 10 kg sled is pulled horizontally by a force. If the coefficient of static friction is 0.3 , what force is needed to get the sled moving at a constant velocity?
*October 29, 2010*

**Science**

no really were all just in the library helping each other get ready for a bug chem test
*October 28, 2010*

**Science**

Constract a heating/cooling curve from an MSDS, draw multistep energy bar charts that correspond to the curve, and calculate the total. Energy released/ absorbed
*October 28, 2010*

**NEED HELP POSTED TWICE**

1. Find the slope of the line through the pair of points. (-1/3,0) and (-1/2,-1/2) Choices: -3 1/3 -1/3 3 2. Write in standard form an equation of the line passing through the given point with the given slope. Slope=8/7; (5,-3) Choices: -8/7x+y=-61/7 -8/7x-1=-61/7 -8/7x+y=61/7...
*October 18, 2010*

**Algebra 2**

1. Find the slope of the line through the pair of points. (-1/3,0) and (-1/2,-1/2) Choices: -3 1/3 -1/3 3 2. Write in standard form an equation of the line passing through the given point with the given slope. Slope=8/7; (5,-3) Choices: -8/7x+y=-61/7 -8/7x-1=-61/7 -8/7x+y=61/7...
*October 18, 2010*

**PHYSICS**

Jade you got to remember that it is accelerating downwards since gravity is -9.8 m/s. so it is not easy as that and I would think before you try and put your knowledge on the page.
*October 17, 2010*

**math**

Can someone explain to me how this question has the answer like this Points:(2,3) y=-2f[2(x+5)] - 4 The answers are (2, 3) ( 2, -3) -> (2, -6)-> (1, -6) -> (-4, -10) I know it has to do with translations like 1/k etc.. but im a bit confused ):
*October 13, 2010*

**3rd grade math (array)**

how i do (6)(4)
*October 7, 2010*

**algebra**

What is the answer to 7(d+5d) - 16d
*October 6, 2010*

**6th grade**

use the distbutive property to rewrite the expression as a product. 6+18y+24
*October 4, 2010*

**physics**

An airplane is flying with a speed of 240 km/hr at an angle of 27 degrees north of east. a) How fast is the plane flying north? b) How fast is the plane flying east?
*September 30, 2010*

**math**

6*6+6*6-6=24 Where would the parenthesis go?
*September 30, 2010*

**Chemistry**

Why does molarity depend on temperature?
*September 26, 2010*

**9th grade**

Around the time of the roman empire the terms inch, foot, and yard were refine. what was the length of a foot based on?
*September 24, 2010*

**algebra**

2y^-3 = 4e^(-x/2)/(1+e(-x/2)) my teacher gave this problem in my chem class and i dont know what he is really asking , does any one have an idea if i have to solve for y or what's going on..
*September 18, 2010*

**CALCULUS**

Use the product rule to calculate the derivative. dh dx x = 4 , h (x) = (x^(-1/2) + 7x)(9 - x^-1) very weird.. i know how to do it, i used product rule and got an answer in decimal but the website is not accepting it. Can any one help me?...
*September 18, 2010*

**chemistry**

how would one do this problem.. 2y^-3 = 4e^(-x/2)/(1+e(-x/2))
*September 18, 2010*

**Math**

What is 87 to the power of 8?
*September 17, 2010*

**physics**

if you are an observer moving at 3.2 m/s towards an object that is moving toward you at 1.4 m/s, what is the relative velocity of the object moving toward you?
*September 16, 2010*

**Physics**

The drawing shows an elastic cord attatched to two back teeth and stretched across a front tooth. The purpose of the arrangement is to apply a force to the front tooth. If the tension in the cord is 1.2N what are the magnitude and direction of the force applied to the front ...
*September 15, 2010*

**Math**

Yes, thank you. I was doing it that way, but didn't know if I was correct.
*September 14, 2010*

**Math**

Find: Re[1/(2+j)] Im[2+j/(3+4j)]
*September 14, 2010*

**History**

Yes or no. To have a favorable balance of trade, a country must sell fewer goods to other countries than it buys from other countries. Yes or no.Money is an example of an capital resource. Yes or no.In our economic system, people receive wages for producing goods or providing ...
*September 12, 2010*

**college math**

stratified sampling
*September 11, 2010*

**English**

I agree with SraJMcGin, that will give you the answers.
*September 8, 2010*

**Algebra 1**

Thank you Jen. U r great
*August 30, 2010*

**Algebra 1**

pythagorean theorema=13 b=9 c=?
*August 30, 2010*

**ARTICLES OF CONFED. - HISTORY**

How did the Confederation Congress attempt to colve the problem of staus of western territory that the states had ceded to it? Which interest groups favored which plans for the sale and distribution of land?
*August 30, 2010*

**Algebra**

Kate cut a 100-foot rope into two pieces. One piece was 5 feet longer than 4 times the length of the other. Find the length of each piece.
*August 26, 2010*

**math**

The height of a rocket in meters t seconds after it is launched is approximated by the polynomial 0.5 at2 + vt + y where a is always -9.8, v is the initial velocity, and h is the initial height. The 4400i was launched from the ground at the same time the Q99 was launched from ...
*August 16, 2010*

**math**

The height of a rocket in meters t seconds after it is launched is approximated by the polynomial 0.5 at2 + vt + y where a is always -9.8, v is the initial velocity, and h is the initial height. A 300X was launched from a height of 10 meters. What was its height after 3 seconds?
*August 16, 2010*

**english**

in the diary of anne frank. how does anne use imagery to describe both the environment of her hiding place and the people in it.
*August 11, 2010*

**English**

How does Anne use imagery to describe both the environment of her hiding place and the people in it?
*August 11, 2010*

**Math**

how do you find the fractional notation for the ratio of 54.28 to 89.69
*August 4, 2010*

**Geometry**

It should be D. If the hypotenuse and leg of a right triangle are congruent to the hypotenuse and leg of another right triangle, then the triangles are congruent
*June 29, 2010*

**math**

A 16-ft ladder is sliding down a wall as shown in the figures below. The variable h is the height of the ladder's top at time t, and x is the distance from the wall to the ladder's bottom. Suppose that the top is sliding down the wall at a rate 5 ft/s. Calculate dx/dt ...
*June 29, 2010*

**Statistics**

Assume that about 45% of all U.S. adults try to pad their insurance claims. Suppose that you are the director of an insurance adjustment office. Your office has just received 110 insurance claims to be processed in the next few days. What is the probability that fewer than 45 ...
*June 26, 2010*

**Statistics**

Assume that about 45% of all U.S. adults try to pad their insurance claims. Suppose that you are the director of an insurance adjustment office. Your office has just received 110 insurance claims to be processed in the next few days. What is the probability that fewer than 45 ...
*June 25, 2010*

**Statistics**

Assume that about 45% of all U.S. adults try to pad their insurance claims. Suppose that you are the director of an insurance adjustment office. Your office has just received 110 insurance claims to be processed in the next few days. What is the probability that fewer than 45 ...
*June 25, 2010*

**Statistics**

. Suppose that about 20% of those called will find an excuse (work, poor health, travel out of town, etc.) to avoid jury duty. If 14 people are called for jury duty, what is the probability that all 14 will be available to serve on the jury? Round your answer to three decimal ...
*June 25, 2010*

**Statistics**

. As the sample size increases The confidence interval also increases (gets larger) The confidence interval decreases (gets smaller) The confidence interval stays the same The population mean increases.
*June 22, 2010*

**Statistics**

What is meant by the 95% confidence interval of the mean ? That 95% of my sample is OK to do more tests. That I am 95% confident that the confidence interval will contain the parameter being estimated. That 5% of my sample is not OK. That I am 95% sure that the population mean...
*June 22, 2010*

**Statistics**

Suppose in a carnival game, there are six identical boxes, one of which contains a prize. A contestant wins the prize by selecting the box containing it. Before each game, the old prize is removed and another prize is placed at random in one of the six boxes. Is it appropriate...
*June 21, 2010*

**Statistics**

Suppose in a carnival game, there are six identical boxes, one of which contains a prize. A contestant wins the prize by selecting the box containing it. Before each game, the old prize is removed and another prize is placed at random in one of the six boxes. Is it appropriate...
*June 21, 2010*

**Statistics**

Suppose that x has a distribution with = 10 and = 5. If a random sample is taken of size n = 44, find . 10.00 my answer was 0.75 is this correct 0.75 1.51 0.11 5.00
*June 20, 2010*

**Statistics**

. A certain company makes 12-volt car batteries. After many years of product testing, the company knows that the average life of a battery is normally distributed, with a mean of 45 months and a standard deviation of 7 months. If the company does not want to make refunds for ...
*June 20, 2010*

**Statistics**

Suppose I am using the t-distribution to estimate or test the mean of a sample from a single population. If the sample size is 25, then the degrees of freedom are ____? I have an answer of 26 is this correct
*June 17, 2010*

**Statistics**

Suppose in a carnival game, there are six identical boxes, one of which contains a prize. A contestant wins the prize by selecting the box containing it. Before each game, the old prize is removed and another prize is placed at random in one of the six boxes. Is it appropriate...
*June 17, 2010*

**Statistics**

I am having trouble understanding standard normal distribution such as if p(z<-0.13) the answer to that was 0.4483 but not understanding how that is computed.
*June 17, 2010*

**Statistics**

Suppose a certain species bird has an average weight ofx=3.55 grams. Based on previous studies, we can assume that the weights of these birds have a normal distribution with 0=0.37 grams. For a small group of 15 birds, find the margin of error for a 70% confidence interval for...
*June 17, 2010*

**Statistics**

In a random sample of 508 judges, it was found that 281 were introverts. Let p represent the proportion of all judges who are introverts. Find a point estimate for p. Round your answer to four decimal places. I am needing assitance in trying to figure out the correct formula ...
*June 17, 2010*

**Statistics**

I am having trouble understanding standard normal distribution such as if p(z<-0.13) the answer to that was 0.4483 but not understanding how that is computed.
*June 17, 2010*

**Statistics**

Can a frequency distribution have overlapping classes? Sometimes No Yes Can't determine. I need more information my answer is sometimes, but i believe this to be incorrect
*June 17, 2010*

**Statistics**

Which of the following can be classified as Discrete and Quantitative data. The acceleration of your car as you drive to school. my answer was number of neighbors still unsure of this though The different colors of the eyes of your classmates. The number of students in your ...
*June 17, 2010*

**Statistics**

Which of the following can be classified as Discrete and Quantitative data. The acceleration of your car as you drive to school. my answer was number of neighbors still unsure of this though The different colors of the eyes of your classmates. The number of students in your ...
*June 16, 2010*

**Statistics**

Can a frequency distribution have overlapping classes? Sometimes No Yes Can't determine. I need more information
*June 16, 2010*

**Statistics**

I am having trouble understanding standard normal distribution such as if p(z<-0.13) the answer to that was 0.4483 but not understanding how that is computed.
*June 16, 2010*

**Statistics**

Can a frequency distribution have overlapping classes? Sometimes No Yes Can't determine. I need more information
*June 16, 2010*

**Statistics**

Which of the following can be classified as Discrete and Quantitative data. The acceleration of your car as you drive to school. my answer was number of neighbors still unsure of this though The different colors of the eyes of your classmates. The number of students in your ...
*June 16, 2010*

**Statistics**

Suppose in a carnival game, there are six identical boxes, one of which contains a prize. A contestant wins the prize by selecting the box containing it. Before each game, the old prize is removed and another prize is placed at random in one of the six boxes. Is it appropriate...
*June 16, 2010*

**Statistics**

Richard has been given a 5-question multiple-choice quiz in his history class. Each question has four answers, of which only one is correct. Since Richard has not attended the class recently, he does not know any of the answers. The success occurs if Richard answers a question...
*June 15, 2010*

**Statistics**

How many sequences contain exactly three heads when you flip a coin five times? 2 15 10 8 12 my answer was 15 ,but that was incorrect
*June 15, 2010*

**Statistics**

still questionable not understanding how to get the problem with the correct answer
*June 15, 2010*

**Statistics**

You draw two cards from a standard deck of 52 cards and replace the first one before drawing the second. Find the probability of drawing a 4 for the first card and a 9 for the second card. Round your answer to the nearest thousandth. 0.006 0.039 0.019 0.155 0.026 which wwould ...
*June 15, 2010*

**Statistics**

A football team’s coach predicts that his team will win 9 out of 10, or 90%, of its games. Which method did he most likely use to make this prediction my answer to this is relative frequency is this correct equally likely outcomes intuition law of large numbers ...
*June 15, 2010*

**Statistics**

httth
*June 14, 2010*

**Statistics**

A football team’s coach predicts that his team will win 9 out of 10, or 90%, of its games. Which method did he most likely use to make this prediction my answer to this is relative frequency is this correct
*June 14, 2010*

**Statistics**

how to sketch the areas under the standard normal curveover the indicated intervals and find the specified areas to the left z=0 to the left z=-0.47 to the left of z=0.45
*June 14, 2010*

**Statistics**

fawnsbetween one and five months old have a approx body weight of u=27.2 kilograms and a standard deviation of o= 4.3 kilograms let x be the the weight of the fawn in kilograms convert the following x intervals to z intervals. x=<30 19<x 32<z<35
*June 14, 2010*

**Statistics**

What are the values of the mean and standard deviation of a normal standard deviation
*June 14, 2010*

**Statistics**

does a raw score less than the mean correspond to a positive or negative score? what about a raw score greater than the mean.
*June 14, 2010*

**language arts**

There is this paper that my teacher gave me and its sooooooo confusing.The directions say:change the word at the bottom of each ladder to the word at the top.Change one letter at a time.Rules:1.If the letter is to the right of the step,remove the word and put another letter in...
*May 31, 2010*

**music**

i cant figure out what a quarter note,scale,tie,treble clef,fermata,accent,half note,sharp, and a stem look like
*May 31, 2010*

**health**

im learning about skin @ hair but im stuck on questions about the dermis
*May 31, 2010*

**algebra 1**

v^2-7v-30/v^2-5v-24
*May 20, 2010*

**math**

what is the rule for Table 1?what are the missing output entries in Table?
*April 21, 2010*

**Math**

What is the area and perimeter of a quadrilateral that has a width of 4m and length of 14m
*April 20, 2010*

**calculus**

A uniform thin sheet of metal is cut in the shape of a semicircle of radius R and lies in the xy plane with its center at the origin and diameter lying along the x axis. Find the position of the Center of Mass using polar coordinates.
*April 19, 2010*

**Physics**

ok formula L=Iw i know I=5kgm^2 and i am finding w. How would i go about finding L give me a hint.
*April 13, 2010*

**Physics**

Wong is standing on a turntable in class holding a weight in each hand a distance .75 meters from the center of his body. He is originally rotating with an angular frequency w=0.3 rad/s. He pulls the weights in so they are only .25 meters from the axis of rotation. The ...
*April 13, 2010*

**physics**

A box is pulled across a horizontal surface at a constant speed by a horizontal rope with tension T=30N. The coefficient of friction between the box and surface is uk = 0.05. 1. Calculate the work done by friction as the box moves 4 meters to the right. i thought it would be ....
*April 13, 2010*

**physics**

momentum is p=mv so p(brother)=(35.6)(9.50)and p(skateboard)= (1.3)(9.50) solve and add them.
*April 13, 2010*

**Physics**

A student gets a 2.9 kg mass to oscillate up and down on bottom of a light vertical spring by pulling her hand up and down on the top end of the spring. The spring is a real spring with a spring constant of 93 N/m and a damping constant of 0.7 N sec/m. (b) The student now ...
*April 13, 2010*

**Physics**

Two geekie physics students with a combined mass of 131 kg jump into their old car to run out for some late night pizza. The distance between the front and back axles of the car is 2.9 m. When they get in the car, the springs compress a total of 9.3 cm. On their way to the ...
*April 13, 2010*

**trigonometry**

It would be 2pi/6 because period (1 oscillation) = 2pi/b
*April 13, 2010*

**Physics**

A student gets a 2.9 kg mass to oscillate up and down on bottom of a light vertical spring by pulling her hand up and down on the top end of the spring. The spring is a real spring with a spring constant of 93 N/m and a damping constant of 0.7 N sec/m. (a) At what approximate ...
*April 12, 2010*

**Physics**

Two geekie physics students with a combined mass of 131 kg jump into their old car to run out for some late night pizza. The distance between the front and back axles of the car is 2.9 m. When they get in the car, the springs compress a total of 9.3 cm. On their way to the ...
*April 12, 2010*

**physics**

A student throws a 9 gram of gum is thrown across the physics lab from a distance of 2.5 m. When the gum has a horizontal velocity of vo it connects with a mass on the end of 1.62 kg simple pendulum which is initially at rest. The pendulum has a length of L of 0.74 m. The gum ...
*April 12, 2010*

**Physics**

nvm i got it, thanks for the help guys.
*April 9, 2010*

**Physics**

can you write me some kind of a equation or explain to me in a way which i can understand. because what they wrote is just flying over my head and i have already spent a good amount of time trying to figure these out. so please help
*April 9, 2010*

**Physics**

A physics student of mass mm = 100 kg gets a summer job painting houses. On his first project, he builds a platform using large pine board with a mass of mb = 60 kg The board has an overall length of L = 8.5 meters and set on two 1 meter tall saw horses so that l = 2.25 ...
*April 9, 2010*