Friday

November 27, 2015
Total # Posts: 878

**chemistry**

1.00 g zinc and 0.80 g sulfur are allowed to react all the zinc is used up 1.50 g of zinc sulfide is formed and some unreacted sulfur remains what is the mass of unreacted sulfur
*February 3, 2013*

**Help please**

Number the items to show the most effective and the least effective to use to scratch the mineral to test its hardness. Use number 1 for the most effective and the 4 for the least efective. Chalk(1) Fingernail(2) Steel screw(4) Paper clip(3) Am I correct????
*January 28, 2013*

**Help please**

According to the textbook,an individual's most. Important decision that will effect the climate is: a. The choice to unplug an extra freezer that is rarely used b. looking for the energy star on new appliances c. Selecting a fuel efficient automobile d. Planting a tree I ...
*January 18, 2013*

**math**

if jay eats 1/3 of jelly beans and jack 1/4 of the jelly bean leveing bill with 10 jelly bean how many were there to start with
*January 18, 2013*

**Probability PLEASE CHECK **

What is the probability of a game being sold if 18,980,000 of that title was sold out of a total 68320,000 different video games Is it 19,989,000/68320,000 1890/6832 = 27.77% rounded to nearest tenth
*January 9, 2013*

**Math-truth table, please check my work!**

p -> ~q , p -> q Are these Equivalent statements? This is my try. Please let me know if these truth tables are correct. p -> ~q p q p -> ~q p q p -> q T T T T T T T F T T F F F T F F T F F F T F F T The statements are not equivalent.
*January 9, 2013*

**Cosmology**

Mass-energy curves space-time
*January 8, 2013*

**Cosmology**

Using large spectroscopic redshift surveys
*January 8, 2013*

**Math-Syllogism valid?**

Some snakes are poisonous. A rattlesnake is a snake. Therefore: a rattlesnake is poisonous. Is syllogism valid or invalid?
*January 8, 2013*

**math-Tiling a room**

How much does it cost to tile a room that is 420 sqft if the tiles used are 1 foot on a side and cost $0.95?
*January 8, 2013*

**statistics-expected value**

100 raffle tickets are sold for $3 with one grand prize of $200. Julie purchased one ticket. What is the expected value of her ticket? What is the fair value of a ticket?
*January 8, 2013*

**math**

100 raffle tickets are sold for $3 with one grand prize of $200. Julie purchased one ticket. What is her expectation? What is the fair value of a ticket?
*January 8, 2013*

**math**

4y X 4y = 16y squared
*January 8, 2013*

**math - expected value and fair price**

one hundred raffle tickets are sold for $3 each. one prize of $200 is to be rewarded.Lisa purchases one ticket. a- what is her expected value b- what is the fair price for a ticket?
*January 7, 2013*

**Statistic- Average**

A mean average of 60 on 6 exams is needed to pass a course. on his first 5 exams, Adam received grades of 46,73,73,63 and 70. If the lowest grade of the exams already taken is to be dropped, what grade must he receive on his last exam to get a C in the Course?
*January 7, 2013*

**solve for x with inequality**

(387-46)+x/6=> or = to 70 (341)+x = or > than 70
*January 7, 2013*

**algebra**

(387-46)+x/6=> or = to 70
*January 7, 2013*

**statistics **

A license plate is to have 3 digits followed by 2 uppercase letters. What is the number of different license plates possible if repetition of numbers and letters is not permitted?
*January 7, 2013*

**statistics-?mean average with lowest number out?**

A mean average of 60 on 7 exams is needed to pass a course. on his first 6 exams, Adam received grades of 46,74,70,59,66 and 72. if his lowest grade of the exams already taken is to be dropped,what grade must he receive on his last exam to pass?
*January 7, 2013*

**statistics-?mean average with lowest number out?**

A mean average of 60 on 7 exams is needed to pass a course. on his first 6 exams, Adam received grades of 46,74,70,59,66 and 72. if his lowest grade of the exams already taken is to be dropped,what grade must he receive on his last exam to pass?
*January 7, 2013*

**math**

A mean average of 60 on 7 exams is needed to pass a course. on his first 6 exams, Adam received grades of 46,74,70,59,66 and 72. if his lowest grade of the exams already taken is to be dropped,what grade must he receive on his last exam to pass?
*January 7, 2013*

**math**

how many different committees can be formed from 6 teachers and 31 students if the committee consists of 4 teachers and 4 students?
*January 7, 2013*

**English I Speech**

Can anyone tell me 3 reasons why fracking is either good or bad and 3 supporting details? Please, thank you It's urgent
*December 24, 2012*

**English I Speech**

Can anyone please share their idea of a strong, powerful hook, background information and thesis about fracking? Please this urgent. Be quick like your life depends on it.
*December 24, 2012*

**Algebra 1- Math**

At the ocean's surface the pressure is 1 atmosphere. At 66 feet below seal level, the pressure is 3 atmosphere. The Relationship between the pressure and the depth is linear. a. find the independent and dependent variable. b. create 2 ordered pairs. c. find the slope. d. ...
*December 14, 2012*

**Algebra 1- Math**

A software company started with 2 employees. In 6 months, the company had 14 employees. The number of employees increased at a steady rate. a. create 2 ordered pairs. b. find the slope. c. Interpret the meaning of the slope. d. Find the prediction equation.
*December 14, 2012*

**wireless communications**

what is the period of the space shuttle traveling at 250km above the earth and what is its velocity
*December 2, 2012*

**7th grade social studies Ms. Sue please**

that is cool Ms. Sue because I am in 7th grade.
*November 29, 2012*

**Fractions**

Solve by drawing a diagram. A Tour bus travels 7 1/2 mi south, 3 1/2 east, 4 1/3 mi north, and 11 1/2 mi west. How far has the tour bus traveled when it crosses its own path?
*November 14, 2012*

**Math**

40.15
*November 13, 2012*

**geography**

thank you for your help:)
*November 8, 2012*

**geography**

the list i gave you
*November 8, 2012*

**geography**

i need to know what influences they had
*November 8, 2012*

**geography**

i need to know the influences they had
*November 8, 2012*

**geography**

Central asia Complete the following: Describe what influence the former invaders of this region brought into the regions culture. a. Turkic b. Arabs c. Mongols under Genghis Khan D. Mongols under Timur e. Russians f. Soviet
*November 8, 2012*

**geography**

in Centrel Asia why are temperatures in this region often really cool at night, but sweitering hot during the days?
*November 8, 2012*

**science**

Calculate the heat of combustion of this wax in kJ/mol. How much energy is produced per carbon? What is the limiting reagent? I have the Q=m*C*deltaT equation to be 10460.45 joules using 100.1 grams C25H52, 25 degrees C, and 4.18 J/gC. I don't know how to find how much ...
*November 7, 2012*

**Math,Statistics**

Johnny suffers from Flu an average of 5 times per week. However, Tony claims that Johnny rarely suffers from fewer than 15 bouts flu per week. If Johnny has been suffering from flu for 180 weeks, at a minimum, how many of those weeks has he suffered from fewer ￼￼...
*November 3, 2012*

**Computers**

The answer is one that you must learn for yourself my friend...
*October 24, 2012*

**Information Technology**

The answer is one that you must learn for yourself my friend...
*October 23, 2012*

**Math**

The answer is one that you must learn for yourself my friend...
*October 23, 2012*

**Chemistry**

Dont worry bro i feel you the answer is 455C.
*October 23, 2012*

**language**

The answer is one that you must learn for yourself my friend...
*October 22, 2012*

**social study help plz**

The answer is one that you must learn for yourself my friend...
*October 22, 2012*

**soicial studys help plz**

The answer is one that you must learn for yourself my friend...
*October 22, 2012*

**Math/Management**

The answer is one that you must learn for yourself my friend...
*October 17, 2012*

**physics**

A dog runs 150{\rm m} away from its master in a straight line in 8.4{\rm s} , and then runs halfway back in one-third the time.Calculate its average speed,average velocity?
*October 7, 2012*

**Math**

5.5 in long and 3.2 in wide must enlarge so that both dimensions are 1.8 times greater
*September 18, 2012*

**physics**

On Planet Y, the value of g is 12 m/s/s. If the human weighs 685 N on this planet, then how much woud he weigh on earth?
*September 12, 2012*

**Math**

If john must have a mark of 80% to past a test of 35 items, the number of items he may miss and still pass the test is
*September 2, 2012*

**Physics**

The leader of a bicycle race is traveling with a constant velocity of +11.9 m/s and is 10.7 m ahead of the second-place cyclist. The second-place cyclist has a velocity of +9.10 m/s and an acceleration of +1.20 m/s2. How much time elapses before he catches the leader?
*August 27, 2012*

**Math**

The grocery store sells kumquats for $4.25 a pound and Asian pears for $2.25 a pound. Write an equation in standard form for the weights of kumquats k and Asian pears p that a customer could buy with $18.
*August 3, 2012*

**Math ( Can You check my Work?)**

1.an = 3n - 1 2. an = 2(2n - 3) 3.an = 4^n 4.an = (2/3)^n 5. an = (-1)^n(n + 5) 6. an = (-1)^n + 1(n + 6) 7. an= n+3/2n-1 8. a1 = -5 and an = an-1 - 3 for n ≥ 2 9. a1 = -6 and an = -2an-1 for n ≥ 2 10.a1 = 4 and an = 3an-1 + 2 for n ≥ 2 11. Find a8 when a1...
*August 1, 2012*

**math**

A radio transmission tower is 170 feet tall. How long should a guy wire be if it is to be attached 7 feet from the top and is to make an angle of 30° with the ground? Give your answer to the nearest tenth of a foot
*July 28, 2012*

**Math ( i just need these two to finish my workshet**

Show the solutions of 1. If a = 4, b = 3, and A = 36o. 2. If a = 3, b = 4, and A = 48.59o Finding a "solution" means solving for all missing sides and angle measures in each triangle.)
*July 28, 2012*

**readings in world civilization**

The answer is one that you must learn for yourself my friend...
*July 26, 2012*

**Math i dont understand**

Window: [-4π , 4π , 1] [-10,10,1] State the Period, Amplitude, Phase Shift, Vertical Shift and Equation in cosine for #5 Number five is a graph is there a way i can show u it i think its valuable for the help on this question
*July 21, 2012*

**Math ( I Dont understand)**

A Amplitude: Maximum y-coordinate – minimum y-coordinate divided by 2 ( Max y – Min y)/2 B Adjustment for period change: B = 2 Period π C Phase shift: Right or left x - transformation D Vertical shift: Maximum y-coordinate + minimum coordinate divided by 2 ( Max...
*July 21, 2012*

**Math ( I Dont understand)**

f(x) = A sin(B(x - C)) + D or f(x) = A cos(B(x - C)) + D thats the equation
*July 21, 2012*

**Math ( I Dont understand)**

State the Period, Amplitude, Phase Shift, Vertical Shift, and equation (using cosine
*July 21, 2012*

**Math**

an = 3n - 1 Answer 2, 3, 4, 5 2, 5, 8, 11 -2, -5, -8, -11 4, 7, 10, 13 3 points Question 2 Write the first four terms of the sequence whose general term is given. an = 2(2n - 3) Answer -6, -2, 2, 6 -1, 1, 3, 5 -2, -4, -6, -8 -2, 2, 6, 10 3 points Question 3 Write the first ...
*July 17, 2012*

**Math**

In 1983, the population of Functionville was 2560, and it tripled in 6 years. a. Write an exponential model for the population of Functionville t years after 1983. b. According to your model, it what year had the population grown to 7 times its size?
*July 15, 2012*

**Math**

Use the compound interest formulas A = P(1 + r/n)nt and A = Pe^rt to solve. Find the accumulated value of an investment of $3000 at 9% compounded continuously for 3 years.
*July 15, 2012*

**Math please help with these word problems i have**

thank yall so much
*July 13, 2012*

**Math please help with these word problems i have**

1.360pie *2r 2.Area+4L 3.4x(4s) 4.f=M+A 5.P(u) 6. x=3.95*x 7. 13.45*Fbs 8. x*2yz/72 9. L/20f+W 10. 2x(2x+2)=W 11. ? 12. ? Sorry i suck at these
*July 13, 2012*

**Math please help with these word problems i have**

1. The circumference of a circle is the product of the number π and twice the radius. 2. The area of a square is the square of the length of a side. 3. The perimeter of a square is four times the length of a side. 4. Force equals the product of mass and acceleration. 5. ...
*July 13, 2012*

**Math PLEASE HELP PLEASE PLEASE PLEASE**

Question 1 Write the first four terms of the sequence whose general term is given. an = 3n - 1 Answer 2, 3, 4, 5 2, 5, 8, 11 -2, -5, -8, -11 4, 7, 10, 13 3 points Question 2 Write the first four terms of the sequence whose general term is given. an = 2(2n - 3) Answer -6, -2, ...
*July 10, 2012*

**CRITICAL THINKING**

What are your thoughts about overthinking and under thinking?
*July 8, 2012*

**Math**

Why is the asymptote of the function in Example #1 y=2 ? ( y = 4x+3 + 2 )
*July 7, 2012*

**Math**

f(x) = (x - 0.6)2 + .66. turn into h/k form what is the quadratic regression equation using your calculator
*July 7, 2012*

**ELECTRIC APPLIANCE TOOLS AND TESTERS**

An important safety precaution you should take before starting any electrical servicing job is to make sure that your
*July 6, 2012*

**Math**

Among all pairs of numbers whose difference is 88, find a pair whose product is as small as possible.
*July 5, 2012*

**Math**

In one U.S. city, the quadratic function models the median, or average, age, y, at which men were first married x years after 1900. In which year was this average age at a minimum? (Round to the nearest year.) What was the average age at first marriage for that year? (Round to...
*July 5, 2012*

**Math**

A developer wants to enclose a rectangular grassy lot that borders a city street for parking. If the developer has 344 feet of fencing and does not fence the side along the street, what is the largest area that can be enclosed?
*July 5, 2012*

**Math**

farmer wants to enclose his pasture which is bordered by a river. If he uses 750 feet of fencing on three sides of the field, what is the largest area he can enclose?
*July 5, 2012*

**physics**

in a hypothetical thermometer, the freezing point of water is marked as -10 and the boiling point is marked at 70. What would be the reading if this thermometer is used to measure the temperature of 50 degree water?
*June 17, 2012*

**physics**

i completely drew a blank on the equation.....so easy Damon...thanks for your help Answer is 6250 cal?
*June 17, 2012*

**physics**

got 22 degrees celsius for the last answer from Damon. Another question is ......How much heat is needed to raise the temperature of a 500g object with specific heat capacity 0.5 cal/g c by 25 degrees?
*June 17, 2012*

**physics**

what is the equilibrium temperature if 100 grams of water at 20 degrees celsius is added to 50 grams of water at 62 degrees celsius in an insulated container of negligible mass?
*June 17, 2012*

**algebra**

Of the two fractions 15/21 and 19/17 which is smaller? I think its 19/17 but need someone to double check please.
*May 30, 2012*

**algebra**

Convert the fraction 8/17 to a decimal. Can you show me how to do this?
*May 30, 2012*

**geometry**

Find the surface area and the volume of a sphere whose radius equals 4?
*May 15, 2012*

**math**

80
*May 15, 2012*

**math**

If you toss a coin three times in a row, what is the probability of getting a head, a tail, and then a head? 1/2*1/2*1/2= 0.125 ????
*April 26, 2012*

**A level, Mechanics**

An object of mass 100 kg is suspended by two identical cables. The tension in cable one is (400i + 300j)N, where i and j are horizontal and vertical unit vectors respectively. The tension in cable two is (pi + qj)N. If the object remain at rest, find p and q
*April 19, 2012*

**math**

A cable weighing 2 lb/ft is 16 ft long. If a 20-lb weight is attached to the end, find the work done in winding up the chain.
*April 18, 2012*

**grade 6 math**

how many rectangles can have the perimiter of 46m
*April 16, 2012*

**economics**

what is the answer to this????
*April 16, 2012*

**College Physics 2056**

Figured it out. E/SA=t 1000/[(2.38e14*B^2)*(Area)]= t
*April 8, 2012*

**College Physics 2056**

An electromagnetic wave strikes a 3.00-cm2 section of wall perpendicularly. The rms value of the wave's magnetic field is determined to be 6.00 10-4 T. How long does it take for the wave to deliver 1000 J of energy to the wall?
*April 8, 2012*

**6th G Math**

Find the area of one rectangle flag. 7in x 8in = ? Divide the area by 2 (because half of the flag is white, the other half is red) That is the area of one white triangle. You need 100 flags so multiply that number by 100. _____ in^2 of fabric
*April 7, 2012*

**health**

all of the following conditions were responsible for the majority of premature deaths in the early 1900's except
*April 7, 2012*

**english**

the snow is so deep mean?
*April 7, 2012*

**english**

what is the personification of this sentence The wind whispered through the dark and gloomy forest.
*April 6, 2012*

**AQA Mechanics (M1), Statics and forces, please hel**

A particle of weight W is attached by a light inextensible string of length a to a point A on a verticle wall. The particle is supported in equilbrium by a light rigid strut of length b attached to a point B on the wall at a distance a vertically below A. Show that the tension...
*April 1, 2012*

**grammar**

Apa MLA Supposed Their
*March 30, 2012*

**chemistry**

72.97
*March 26, 2012*

**M1, Mechanics **

A particle of mass 4kg is suspended from a point A on a vertical wall by means of a light inextensible string of length 130cm.A horizontal force P, is applied to the particle so that it is held in equilibrium a distance of 50cm from the wall. Find the value of P and the ...
*March 19, 2012*

**HVAC**

Why must all valves be open when an evacuation is performed?
*March 18, 2012*