Wednesday

July 23, 2014

July 23, 2014

Total # Posts: 2,696

**Math**

A standard deck of playing cards is shuffled and three people each choose a card. Find the probability that the first two cards chosen are clubs and the third card is black if the cards are chosen with replacement, and if the cards are chosen without replacement.

**Geometry**

Tan x=(100/50) so X= Tan^-1(100/50), you have to use the inverse of tan therefore, x=63.435

**US Government**

The answer is True

**Set Theory: Sideways U with a line under it**

I know the sideways U means "is a subset of" and if there is a line under it, it means "is equal to" I have two sets: {-3,0,3} _____ {-3,-1,1,3} choose the correct symbol a. sideways U with line under it and slash through it b. sideways U with line under it...

**Set Theory :Complements with Ellipses **

Let U= {1,2,3, . . .}, A= {1, 2, 3, . . . ., 39}. use the roster method to write the set A' Find A' = _____________________________________________ I understand how complements work. Complement A' is everything outside of set A. However, since U goes on infinitely ...

**math: set theory **

{X|X E N and x greater than or equal to 4} This is a set theory problem: | = means such that is E = is a symbol used to replace the words "is an element of" N= represents all natural numbers answer choices are: a) {5,6,7,...,100} b) {5,6,7,...} c) {4,5,6} d) {4,5,6,....

**English 2b**

What is the definition of a hook? a. a topic sentence that states the main point b. an elaborating sentence that provide details or facts c. an enticing statement that grabs the reader’s interest d. an extension sentence that restates or clarifies the topic sentence

**English 2b**

Read the paragraph. The snow began falling early in the morning. Tiny, weightless crystals. By early afternoon, the ground was covered with several inches of snow. Snow flurries continued throughout the day. When the evening came, the snow was still falling. At least a foot o...

**Physics**

Is there normal contact force on a frictionless surface?

**Physics**

What happens when we bring a mercury barometer to the moon?

**Physics**

What happens to potential energy during melting

**Physics**

A motorcycle is travelling at a constant acceleration in a straight line. When it passes by the first lamp post, it is travelling at 10ms-1. When is passes by the next lamp post which is 200m from the first lamp post, the motor cycle is travelling at 16 ms-1. What is the accel...

**Chemistry **

What is the reaction between mno4- and c2o42- and is there a colour change in this reaction?

**math**

C.

**Physics**

A soccer ball is kicked with a speed of 9.95m/s at an angle of 35.0∘ above the horizontal.If the ball lands at the same level from which it was kicked, how long was it in the air?

**Physics**

A batter hits a ball and it is caught 4 seconds later 100 meters from home plate. What is the initial velocity of the ball?

**Math: Linear Equation**

thank you so much!!

**Math: Linear Equation**

An assignment with 3 of these problems was assigned to my class and we haven't learned it yet. I don't know when our professor plans on covering it but I'd like to finish my homework.

**Math: Linear Equation **

I have not learned this yet in class and I am stuck on this homework problem. Graph the linear equation by using a table of solutions. 3x-4y=12

**chemisty**

calculate the H+ for green tea with a pH of 7.9

**chemistry**

calculate the mass percent of the following solutions 1.25 g CaCL2 in 35.0 g H2O I am not sure if i have the correct set up (1.25g CaCl2/1.25 g CaCl2 + 35.0 g H20)*100

**college chemistry**

if 75 g of ice at 0.0 degrees C were added to 1.5 L of water at 75 degrees C what would be the final temperature of the mixture

**chemistry**

I got the molecular formula is NaHCO3+H2SO4=Na2SO4+CO2+H2CO3 and i got the total ionic formula is NaOH+H2CO2(aq)= Na2CO3 + HOH but i am having trouble finding the net ionic formula can you please help me thank you

**Catering**

Guidelines to formal etiquette quite clearly stipulate that? A. corn on the cob should be eaten with a knife and fork. B. asparagus spears should be eaten with the fingers. C. eating a canapé directly from a server's tray is permissible. D. bread should always be di...

**Chemistry**

If you dissolve 13.5 g of malic acid, C4H6O5, in half a liter of water (0.500 L), what is the molarity of the acid in the solution?

**Accounting Questions**

Ugh. This class. Does anyone have the answers?

**chem**

calculate the density of each of the following gases: a)NH3 at 25 Degrees Celsius and 1.2 atm b)Ar at 75 Degrees Celsius and 745 torr

**college chem**

A mixture contains H2 at 600 torr pressure, N2 at 200 torr pressure and O2 at 300 pressure. what is the total pressure of the gases in the system?

**Engineering**

Three resistors , 50 ohms, 100 ohms, and r3 are connected in a series to a power source with potential difference 48 volts and a current throughout the circuit. Can anyone help me figure out what r3 is ?

**college chem**

A sample of O2 gas was collected over water at 23 degrees celsius and 772 torr. what is the partial pressure of the O2?

**college chem**

a sample of a gas occupies a volume of 1025 mL at 75 degrees Celsius and 0.75 atm. What will be the new volume if temperature decreases to 35 degrees Celsius and pressure increases to 1.25 atm

**college chem**

A sample of methane gas CH4, occupies a volume (L) of 58.2 L at a pressure of 7.25 atm. What volume will the gas occupy if the pressure is lowered to 2.03 atm

**pipe fitter test certification**

Please Help!...I am in need of a study guide for my pipefitters test, or an outline of what's on the test. Unfortunately I am not able to take the class available. PLEASE if you know of one or where one would be available. Any information will be greatly appreciated and a ...

**Chemistry**

What is the specific heat of an unknown substance if a 2.45g samples releases 12.9 cal as its temperature changes from 25.1 degrees C to 20.1 degrees C?

**Language Arts**

That is correct

**HELP!**

Need some help with the 6:3:1 ratio question. Don't understand.

**math**

Houston Community College is planning to construct a rectangular parking lot on land bordered on one side by a highway. The plan is to use 640 ft of fencing to fence off the other three sides. What should the dimensions of the lot be if the enclosed area is to be a maximum?

**Chemistry help plzzzzz!!!!! **

I've tried solving this problem 100x and i keep getting it wrong. I dont know where i am going wrong. Wouldnt it be: (100ml * 4.180 * 6.49) + (6.50*6.49) 2713+42.2=2755.2= 2755.2/0.05=55104 Then convert to kj so 55104/1000=55.104 which would be 55.1 for correct sig digits?...

**Spanish 101**

Choose the logical word or words to complete each sentence. 1. A mis hermanos y a mí nos____ aprender verbos nuevos. 1 encanta 2 encantamos 3 encanto 4 encantan I chose answer 2 ecantamos 2. A mi papá ____ molestan los niños traviesos. 1 los 2 me 3 se 4 le...

**Math**

Thank you so much for the help!

**Math**

This problem from China is almost 2000 years old: Find a number that when divided by 3 gives a remainder of 2, when divided by 5 gives a remainder of 3, and when divided by 7 gives a remainder of 4.

**math**

Use each clue to find a three digit number

**statistics**

In a statistics class of 45 students, 12 have a strong intrest in statistics. If two students are selected at random from this class, what is the propability that both of them have a strong interest in statisitcs?

**CHEMISTRY**

An electron undergoes a transition from an n=3 to an n=1 stationary state and red light is released. Which of the following forms of electromagnetic radiation could be released for an n=2 to n=1 electron transition within the same atom? -blue visible light -yellow visible ligh...

**physical science**

Green light has a frequency of about 5.3Hz~10Green light has a frequency of about 5.3Hz~ 10^{14}. Using the relationship speed of light (c)=fƒÉ find its wavelength in air.

**physics**

In I2 you halfed the radius of the flat disk as if it were a diameter like pottery wheel. it's not 0.065 it's 0.13

**algebra**

What is the slope of the line 4x + 6y = 12

**Math **

jared's football team lost a total of 12 yards during 4 plays of the game. They lost the same number of yards during each of the plays. What is an integer to represent it?

**Math**

A MP3 player is marked up by 10% and then marked down by 10% what is the final price?

**Science**

What is true about X-rays and microwaves? (1 point) a. X-rays have greater speed than microwaves. b. X-rays have greater amplitude than microwaves. c. X-rays have greater frequency than microwaves. d. X-rays have greater wavelength than microwaves.

**Science**

I think it's a. X-rays

**Science**

2. Which waves have the longest wavelength and lowest energy on the electromagnetic spectrum? (1 point) a. X-rays b. infrared c. radio waves d. gamma rays

**Science**

Is there any way I can attach the picture?

**Science**

1. Compare the two light waves above. Which wave would produce the brightest light and which wave would have the least energy? (1 point) a. wave A; wave A b. wave A; wave B c. wave B; wave A d. wave B; wave B Is it C?

**Math 30-2**

There are 7 different books on a shelf. How many selections of more than 4 books can be made?

**Stats**

In 1898 L. J. Bortkiewicz published a book entitled The Law of Small Numbers. He used data collected over 20 years to show that the number of soldiers killed by horse kicks each year in each corps in the Prussian cavalry followed a Poisson distribution with a mean of 0.63. (a)...

**Stats**

The number of failures of a testing instrument from contamination particles on the product is a Poisson random variable with a mean of 0.028 failure per hour. (a) What is the probability that the instrument does not fail in an 8-hour shift? (b) What is the probability of at le...

**math**

$155.5 how I found it: I tried to find what an amount for which to total amount of tax cost $9.33 so, I chose random numbers to test this, 155.5x.06=9.33

**Statistics**

Astronomers treat the number of stars in a given volume of space as a Poisson random variable. The density in the Milky Way Galaxy in the vicinity of our solar system is one star per 16 cubic light years. (a) What is the probability of three or more stars in 16 cubic light yea...

**Statistics**

An electronic product contains 32 integrated circuits. The probability that any integrated circuit is defective is 0.02, and the integrated circuits are independent. The product operates only if there are no defective integrated circuits. What is the probability that the produ...

**maths**

my number is less than 100 one more than a multiple of 3 one of its digits is prime if you reverse its digits you get a prime it has exactly four factors the sum of digits is prime if you miltiply it by 5 it is greater than 100

**Math**

a^2+b^2=c^2 a=24 b=25 c= squareroot(24^2+25^2)=34.6554469

**math**

Thank you

**math**

how did you get .1?

**math**

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%?

**algebra 2**

X^2-4x-3.5=0 x=(-b+ or - squareroot(b^2-4ac))/2a x= (4+ or - squareroot((-4)^2-4(1)(-3.5)))/2 x=(4+ squareroot(30))/2 x=(4- squareroot(30))/2 x=4.738612788 x=-.7386127875

**algebra2**

4(x-1)(x-1)+3 4(x^2-2x+1)+3 4x^2-8x+4+3 4x^2-8x+7

**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 ...

**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%?

**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

**Math**

Thank you

**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 ...

**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?

**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, wh...

**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? ...

**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.

**Stats**

Thank you

**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?

**computer programming**

Are you a beginner?

**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

**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

**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

**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

**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. ...

**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 ...

**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

**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 t...

**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 r...

**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

**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 h...

**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...

**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

**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

**math**

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

**chemistry**

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

**English**

How do you write a narrative essay about something you regret doing when you have no regrets? lmao

**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 ...

**Global Studies (Please help)**

I just have the same question and i need the answer, i am stuck

**Global Studies (Please help)**

So its colorado

**Global Studies (Please help)**

I dont know:/

Pages: **1** | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>