Wednesday

September 3, 2014

September 3, 2014

Total # Posts: 2,717

**Statistics**

Disk of ploycarbonate plastic form a supplier are anaylzed for scratcha nd shock resistance. the results from 100 disks are summarized below: Shock Resistance high low Scratch high 70 9 resistance low 16 5 Let A denote the even that a disk has high shock resistance, and let B ...
*February 18, 2014*

**Statistics**

The probability that Jack plays guitar on a raining day is 0.6 and on a sunny day is 0.5. The probability that is rains tomorrow is 0.8. Find the probability that Jack will not play guitar tomorrow? Is it 32%?
*February 18, 2014*

**math**

sophie ruth is eating a 50 gram chocolate bar which is labled 30 % cocoa how many grams of chocolate are in the chocolate bar
*February 18, 2014*

**Math**

Thank you
*February 16, 2014*

**Math**

Each person in Sharae's family of 5 eats 3 bowls of cereal each week. Her mother is going grocery shopping and wants to know how many bowls of cereal they will eat over the next 4 weeks. Write and solve an equation to find how many bowls of cereal the family will eat? Use ...
*February 16, 2014*

**physics**

A rocket moves upward, starting from rest with an acceleration of 26.3 m/s2 for 3.91 s. It runs out of fuel at the end of the 3.91 s but does not stop. How high does it rise above the ground?
*February 12, 2014*

**Math**

The combined math and verbal scores for students taking a national standardized examination for college admission, is normally distributed with a mean of 620 and a standard deviation of 220. If a college requires a student to be in the top 10 % of students taking this test, ...
*February 9, 2014*

**Stats**

Determine the following random variables discrete or continuous: a)Number of fish I caught during 2 hours? I said: discrete b)Temperature of a coffee cup? I said: continuous c)Height of a 2-year-old maple tree? I said: continuous d) Number of credit cards I have in my wallet? ...
*February 8, 2014*

**Stats**

The probability that Jack plays guitar on a raining day is 0.6 and on a sunny day is 0.5. The probability that is rains tomorrow is 0.8. Find the probability that Jack will not play guitar tomorrow.
*February 8, 2014*

**Stats**

Thank you
*February 8, 2014*

**Stats**

How many ways to choose 2 boys and 3 girls from a class of 10 boys and 15 girls? Would you do: 10C2=45 15C3=455 (45)(455)=20,475?
*February 8, 2014*

**computer programming**

Are you a beginner?
*February 7, 2014*

**calculus**

Evaluate the limit as x approaches 0 of [tan(x+Δx)-tan(x)] /Δx: sec^ 2 (x) cot (x) sec (x) does not exist
*February 6, 2014*

**calculus**

Suppose f (1) = 2, f ΄(1) = 3, g(1) = 5, and g΄(1) = -4. Evaluate (f g)΄v at x = 1. Answer -12 7 10 23
*February 6, 2014*

**calculus**

It is known that x 2 + 4x ≤ f(x) ≤ -x 2 -4x the interval [-4, 0]. Use the Squeeze Theorem to evaluate the limit as x approaches negative 2 of f of x. -4 0 4 Squeeze Theorem does not apply
*February 5, 2014*

**calculus**

Suppose f of x equals 3 times x minus k when x is less than 5 and equals 1 plus k times x when x is greater than or equal to 5.Find the value of k that would make f continuous at x = 5. -3 0 7/3 no such k will make f continuous
*February 5, 2014*

**calculus**

At a constant temperature, the pressure, P, and volume, V, of a trapped gas have the relationship P equals the quotient of k divided by V , where k is some positive constant. What occurs if the volume is compressed such that V → 0+? The pressure increases without bound. ...
*February 5, 2014*

**physics**

Two boxes are connected by a cord running over a pulley as shown in the picture below. Box I of mass 8.0 kg is on the top of the table; the coefficient of kinetic friction between box I and the table is 0.10. Box II has a mass of 15.0 kg. What is the tension in the cord? 35 N ...
*February 5, 2014*

**physics**

As a rock of mass 3.0 kg drops from the edge of a 60. meter high cliff, it experiences air resistance, whose average strength during the fall is 22. N. At what speed will the rock hit the ground? Answer 1.5 m/s 13 m/s 18 m/s 26 m/s 34 m/s
*February 5, 2014*

**physics**

A 15.0-kg box is released from rest on a rough inclined plane tilted at an angle of 45° to the horizontal. The coefficient of kinetic friction between the box and the inclined plane is 0.200. What is the force of kinetic friction on the box? Answer Fifteen square root of ...
*February 5, 2014*

**physics**

A student pulls a box of books on a smooth horizontal floor with a force of 100 N in a direction of 30° above the horizontal. If the mass of the box and the books is 40.0 kg, what is the acceleration of the box? Square root of three meters per second squared. Four square ...
*February 5, 2014*

**physics**

A constant force of 900 N pushes a 100 kg mass up the inclined plane shown above at a uniform speed of 5 m/s. ( hight= 1m) The power developed by the 900 N force is most nearly: 400 W 800 W 900 W 1000 W 4500 W
*February 4, 2014*

**physics**

The cart of mass 10 kg shown above moves without frictional loss on a level table. A 30 N force pulls on the cart horizontally to the right. At the same time, a 10 N force at an angle of 60° above the horizontal pulls on the cart to the left. What is the magnitude of the ...
*February 4, 2014*

**physics**

The two blocks of masses M and 2M shown above initially travel at the same speed v but in opposite directions. They collide and stick together. What is the final velocity of the mass M after the collision? negative one sixth v. negative one third v. Zero one sixth v. one third...
*February 4, 2014*

**physics**

The figure above shows an object of mass 0.5 kg that is suspended from a scale and submerged in a liquid. If the reading on the scale is 4 N, then the buoyant force that the fluid exerts on the object is most nearly: 1.3 N 1.0 N 0.75 N 0.33 N 0.25 N
*February 4, 2014*

**physics**

For which of the following motions of an object must the acceleration always be zero? I. Any motion in a straight line II. Any free fall motion III. Any motion in a circle it can be more than one :P
*February 4, 2014*

**math**

I dont think this answer is correct because 3*42=126 than + 42 = 168 not 164
*February 4, 2014*

**chemistry**

What physical properties of calcium chloride, citric acid, sodium iodide, potassium iodide, and sucrose have in common?
*February 3, 2014*

**English**

How do you write a narrative essay about something you regret doing when you have no regrets? lmao
*February 3, 2014*

**Global Studies (check please)**

The belief, shared by many Americans, that the United States had a right to own all the land from the Atlantic to the Pacific was called a. America's Right ***** b. Manifest Destiny c. The Inheritance d. Free Will Which of the following was neither part of the Confederacy ...
*February 3, 2014*

**Global Studies (Please help)**

I just have the same question and i need the answer, i am stuck
*February 3, 2014*

**Global Studies (Please help)**

So its colorado
*February 3, 2014*

**Global Studies (Please help)**

I dont know:/
*February 3, 2014*

**math**

5/3z-4 = -2/1-2z (solve the proportion)
*January 28, 2014*

**math**

152
*January 28, 2014*

**math**

8/x+4 = 12/5x - 13 (solve the proportion)
*January 28, 2014*

**math**

on monday biologists tagged 100 sunfish from a lake.on friday the biologists counted 12 tagged fish out of a sample of 400 sunfish from the same lake.estimate the total number of sunfish in the lake
*January 28, 2014*

**math**

write an equation in function form. (y=mx + b) 1.7x - y = 7 2.15x + 3y + 2 = 9x + 14
*January 28, 2014*

**math**

On a class trip there wre 30 more girls than boys.The total number of students on the trip was 210.Write and solve an equation to find the number of girls and the number of boys on the class trip.
*January 28, 2014*

**math**

A new plasma screen tv cost $4600.A family makes a down payment of $136 and pays off the balance in 36 equal monthly payments.Write an equation to find the monthly payment.
*January 28, 2014*

**math**

Miguel is a cartoonist. Miguel drew 2 cartoon cells in 3 hours. If he keeps drawing at the same rate, about how many cells will he draw in 9 hours?
*January 28, 2014*

**chemistry**

if you dissolve 20mg of alcl3 into 2.0 of a 2.5 molal nacl solution (density 1.08kg/l), what would be the mass concentration (ppm(weight)) of al3+ in the resulting solution?
*January 26, 2014*

**Fractions**

(2/4)= 1/2 8 red barrettes = 1/2 of Julias collection since half of Julia's barrettes are red, and she has 8 red barrettes you multiply 8*2 to get 16 (2 or (2/1) is the inverse fraction of (1/2)) to double check your answer.. 16*(2/4)
*January 26, 2014*

**science/writing **

How are stink bugs harmful to crops?
*January 16, 2014*

**add maths**

A function f is defined by f:x→1-2x.Obtain expressions in the same form for f^3.
*January 13, 2014*

**add maths**

Two functions f and g are defined by f:x→3x+2 and g:x→x^2-2.Obtain expressions for fg and gf.Find the value(s) of x for which f=g? fg=gf?
*January 13, 2014*

**maths**

The production of natural rubber in Malaysia in July 2004 was 108315 tonnes,a rise of 4.9% compared to the previous month.Calculate the production of natural rubber in June 2004 in kg.Give your answer in standard form,correct to 4 significant figures.
*January 12, 2014*

**add maths**

Function of g is g:x→x-1 over x+2,x not equal to -2. Find g^2
*January 12, 2014*

**maths**

The scale of a map is 1:25000.Find the actual length of a road,in cm,which is measured 7.8 cm on the map.Express the answer in standard form.
*January 11, 2014*

**maths**

Yeah..same as my answer sheet !thanks:)
*January 11, 2014*

**maths**

The total population of the earth was estimated to be 6.42 billion people.Given that the total land surface area of the earth is about 1.5×10^8km^2.Find the average number of people living in 1 km^2 of land on earth,correct to 2 significant figures.Thanks a lot for ...
*January 11, 2014*

**maths**

Ohh..i got it..divide two..thanks a lot!
*January 11, 2014*

**maths**

Steve,how to get 4.9?
*January 11, 2014*

**maths**

A large pipe has a diameter of 9.8×10^2cm.Water flows in the pipe at a speed of 5m s^-1.Find the volume in m^3,of water that flows out from the pipe every second,correct to 2 significant fogures.[Take pai as 3.142]
*January 11, 2014*

**writing thesis statments**

I am stuck on what would be a good thesis statement for my topic of, " How does drug addiction affect America as a whole?
*January 11, 2014*

**rational and irrational**

is 0.3 pi rational,67/79 , 75 pi,0.3 pi,13 pi
*January 9, 2014*

**math**

nadia has taken 3 exams and her average score so far is 80.If she gets 100,a perfect score on the remaining 2 exams what will her new average be ?
*January 9, 2014*

**math**

omar has taken 4 exams and his average score so far is a 79.If he gets 100,a perfect score,on the remaining two exams,what will his new average be ?
*January 9, 2014*

**semi colons and colons**

this is what i ate for breakfast an apple and a bowl of ceral
*January 1, 2014*

**PHI103**

Assume you are given a sound argument. What do you know about it? (Points : 1) It is deductive. It is valid. Both A and B None of the above
*December 22, 2013*

**PHI103**

"10 is less than 100; 100 is less than 1,000; consequently, 10 is less than 1,000" is an example of a (Points : 1) sound deductive argument. valid inductive argument. sound inductive argument. weak inductive argument.
*December 22, 2013*

**PHI103**

To criticize a deductive argument logically, one might: hit the person making the argument. show one of the premises is false. show one of the premises is true. show the conclusion follows validly from the premises.
*December 22, 2013*

**algebra **

a survey at your school found that 792 in 1,220 students have a cell phone. what percent of the students in have a cell phone? round to the nearest hundredth where necessary 6.49% 54.04% 64.92% (i think that's the answer) 79.20%
*December 15, 2013*

**chemistry**

how many moles of nitrogen would be needed to make 10.0 ammonia?
*December 12, 2013*

**government**

Why is the formal amendment process so difficult and complicated?
*December 11, 2013*

**AP Chemistry**

I HAVE NO CLUE
*December 8, 2013*

**MATH**

WHAT IS PRECALC
*December 4, 2013*

**physics**

Two liters of nitrogen combine with 6 L of hydrogen to form 4 L of ammonia. If the molecules of nitrogen and hydrogen have two atoms each, how many atoms of hydrogen and nitrogen are there in one molecule of ammonia?
*November 22, 2013*

**physics**

The pressure in each of your car tires is 1.80 105 Pa. The mass of your car is 1660 kg. Assuming that each of your tires bears one-quarter of the total load, what is the contact area of each tire with the road?
*November 22, 2013*

**physics**

A plane flies due north (90° from east) with a velocity of 100 km/h for 3 hours. During this time, a steady wind blows southeast at 30 km/h at an angle of 315° from due east. After 3 hours, where will the plane’s position be relative to its starting point? Show ...
*November 21, 2013*

**physics**

A plane flies due north (90° from east) with a velocity of 100 km/h for 3 hours. During this time, a steady wind blows southeast at 30 km/h at an angle of 315° from due east. After 3 hours, where will the plane’s position be relative to its starting point? Show ...
*November 21, 2013*

**physics**

1. A man pulls a crate with a rope. The crate slides along the floor in the horizontal direction (x direction). The man exerts a force of 50 N on the rope, and the rope is at an angle q. Describe how the force components (Fx, Fy) change as the angle increases from 0° to 90...
*November 20, 2013*

**physics**

3. You travel from New Orleans, Louisiana, with the following vectors: • New Orleans à Point A: q = 180°, Δd = 483 km • Point A à Point B: q = 106°, Δd = 347 km • Point B à Point C: q = 106°, Δd = 347 km Remember: ...
*November 20, 2013*

**Physics**

A plane flies due north (90° from east) with a velocity of 100 km/h for 3 hours. During this time, a steady wind blows southeast at 30 km/h at an angle of 315° from due east. After 3 hours, where will the plane’s position be relative to its starting point? Show ...
*November 20, 2013*

**Physics**

Two spheres of equal mass are thrown against a wall with equal velocities. One sphere rebounds with 75% of its original speed, while the other sticks to the wall. Which imparted a greater impulse to the wall, the sticky ball or the rebounding ball? Justify your answer.
*November 19, 2013*

**Physics**

A 400 gram block slides down a 30 degree incline from rest and reaches the bottom with a speed of 4.50 m/s. If the height through which the block falls is 2.0 meters, find the average frictional force that acted on the block.
*November 19, 2013*

**Physics**

A liquid of density 1.23 × 103 kg/m3 flows steadily through a pipe of varying diameter and height. At location 1 along the pipe the flow speed is 9.23 m/s and the pipe diameter is 1.07 × 101 cm. At location 2 the pipe diameter is 1.71 × 101 cm. At location 1 ...
*November 14, 2013*

**Spanish**

Can someone review my answers please 1. Alfredo dice que el viejo auto de Marisol todavía__ (ser/estar) seguro. Marisol piensa que quiere un auto nuevo pero no___ (ser/estar) segura. 2. Marta _____ (ser/estar) aburrida de pasar seis horas en la biblioteca. 3. Ella ...
*November 12, 2013*

**history**

Thank you!
*November 11, 2013*

**history**

In the election of 1912, Teddy Roosevelt's Bull Moose Party platform was built around what he called the A. New Freedom. B.(New Nationalism). C. Square Deal. D. Fair Deal. Correct?
*November 11, 2013*

**math**

800
*November 6, 2013*

**literature**

what is the purpose of the odan tree in nigeria
*November 5, 2013*

**Calculus-Applied Optimization Problem**

If a total of 1900 square centimeters of material is to be used to make a box with a square base and an open top, find the largest possible volume of such a box.
*October 31, 2013*

**Chemistry**

Ok I thought that before I submitted the question but I thought that seemed too easy! That you so much for your help though :)
*October 30, 2013*

**Chemistry**

well i got 5 for the first part but I thought that the delta E was the same for both because the wavelengths were pretty much the same, so i got 1 as the final but thats only because that made both of the equations exactly the same
*October 30, 2013*

**Chemistry**

A ground state hydrogen atom absorbs a photon of light having a wavelength of 94.96 nm. It then gives off a photon having a wavelength of 95 nm. What is the final state of the hydrogen atom? I think I got 5 for an answer, but I am not sure if I did this right or not
*October 30, 2013*

**Chem**

ok, i think i got 5 for an answer do you think this is correct??
*October 30, 2013*

**Chem**

A ground state hydrogen atom absorbs a photon of light having a wavelength of 94.96 nm. It then gives off a photon having a wavelength of 95 nm. What is the final state of the hydrogen atom?
*October 30, 2013*

**Spanish**

I wanted to know if i used the right verbs Complete the sentences with the correct forms of conseguir, ir, pensar, querer, or suponer. 1. Nosotros (blank) de excursión a las montañas, Toño. 2. ¡Yo (blank) que vas a dormir todo el fin de semana! 3. No...
*October 29, 2013*

**Spanish**

I need help to revise these sentences, thanks Form complete sentences using the verbs and nouns provided. Add any other necessary words. 1. María Elena / mostrar / fotos / a sus amigas 2.Martín y su hermano / empezar / lecciones de natación / martes 3. ...
*October 29, 2013*

**Spanish**

I need someone to heck if this is correct Complete each sentence with the conjugated yo forms of the verbs in the word bank. hacer poner salir suponer traer 1. Todos los días salgo___ de la universidad a las tres y voy a casa. 2. Llego a mi casa a las cuatro y_pongo__ ...
*October 29, 2013*

**math**

what type of numbers is found an odd number of times in the table
*October 23, 2013*

**math**

what type of numbers is found an odd number of times in the table from 1 to 9?
*October 23, 2013*

**Counting and probability **

I have no idea on how to do this, please help! Maya is invited to a wedding. She's gets all the items (dress pants, shoes, necklaces and a scarf) she finds suitable to wear out of her closet. A) Maya has two dress pants and four blouses. how many outfits does she have ...
*October 23, 2013*

**physics**

a plane flies due north at 225km/h. a wind blows it due east at 55km/h. what is the magnitude and direction of the plane's resultant velocity?
*October 19, 2013*

**physics**

a plane flies due north at 225km/h. a wind blows it due east at 55km/h. what is the magnitude and direction of the plane's resultant velocity?
*October 19, 2013*

**math**

A painter leans a 15 foot ladder against the side of a house. The top of the ladder touches the house at a height that is 3 feet more than the distance from the house to the bottom of the ladder. How far is the bottom of the ladder from the house?
*October 12, 2013*

**english**

1. Which of the following sentences is correctly punctuated? A. The local police asked the F.B.I. to assist with the case. (B). Mr. Jones visited the YMCA before becoming a member. C. Mary remembered to buy milk didn't she? D. The company held it's annual party at the ...
*October 11, 2013*

**Physics**

The systems shown below are in equilibrium (with m = 4.80 kg and θ = 27.0°). If the spring scales are calibrated in newtons, what do they read? Ignore the masses of the pulleys and strings and assume the pulleys and the incline are frictionless. scale in (c) scale in...
*October 3, 2013*

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