Thursday

July 2, 2015

July 2, 2015

Total # Posts: 911

**chem**

A 0.158 g sample of magnesium metal reacts completely with 100.0 mL of 1.0 M hydrochloric acid in a coffee cup calorimeter. The temperature of the solution rose from 25.6°C to 32.8°C. What is ∆Hrxn? Assume the specific heat of the solution is 4.184 J/mol-K and ...
*June 25, 2015*

**socialology**

Describe a situation in which you might see a gesselschaft community partnered with mechanical solidarity.
*June 16, 2015*

**english**

"I hope this song will help you to bring your country back to its stage it was and motivate to develop it more further. " this dialogue
*May 6, 2015*

**english**

"I hope this song will help you to bring your country back to its stage it was and motivate to develop it more further. " Since the logic of the dialogue is not correct; write a short reply going against him. ( DEBATE )
*May 6, 2015*

**math**

prove that: 4cosec2ACot2A=cosec^2A - sec^2A
*May 6, 2015*

**Maths **

A pool is 12m long and 7m wide it is surrounded by a 3m paved area on all sides the whole complex is enclosed by a 2m high fence what is the total length of this fencing
*May 4, 2015*

**Algebra**

a car driver accelerates to a speed of 35 miles per hour and then takes her foot off the gas pedal even though she does not press the brake pedal at any time she eventually rolls to a stop which of the following most likely causes the car to come to a stop
*April 17, 2015*

**physics**

B C C C D B A C B D B D C A C B B D A D
*April 17, 2015*

**Math**

Prove that 140 * 141 * 142 * ... * 159 * 160 is divisible by 4321.
*April 15, 2015*

**HELP MEH PLS**

I actually need help with number 1 1. a. fluorescence b. rarefaction c. radioactivity** d. electromagnetic Could you tell me if this is right?
*April 1, 2015*

**Geo**

Indonesia & Malaysia
*March 7, 2015*

**science**

when astone is thrown slighty above amoving lorry .where will the stone fall? .2.when loam soil is mixed with sandy soil .what will not change?
*February 26, 2015*

**physics**

Calculate the total resistance for a 650 ohm, a 350 ohm, and a 1000 ohm resistor connected in series.
*February 4, 2015*

**math**

given thatvABCD is a parallelogram where A(1,2),B(4,4), and C(6,2) determine the coordinates of D using vector?
*January 29, 2015*

**chemistry**

What amount of carbon dioxide is produced per kJ of heat produced in burning ethene, C2H4?
*January 23, 2015*

**Calculus**

Also how would I figure out how fast the pile is increasing? ..I don't really understand whats the difference from finding the actual height after five minutes or how fast it is increasing.
*December 31, 2014*

**Calculus**

How would I find out what the height of the pile would be after 5 minutes? A machine starts dumping sand at the rate of 20 m3/min, forming a pile in the shape of a cone. The height of the pile is always twice the length of the base diameter. The volume formula for a right ...
*December 31, 2014*

**Math**

Waitttttttt, nevermind I figured it out :) its 4
*December 21, 2014*

**Math**

If 12 ft^2 of material is available to make a box with a square base and an open top, find the largest possible volume of the box. 2 ft3 4 ft3 5 ft3 8.5 ft3 9 ft3 the whole ft^2 and ft^3 throws me off..can you help
*December 21, 2014*

**linear approximation**

a) Find the linear approximation of the function f(x)=4cos(3x^2) near x = 0 b) Use the approximation found in part (a) to estimate the value of f(pi/20)
*December 7, 2014*

**chem**

Draw the two chair conformers of cis-1-ethyl-4-isopropylcyclohexane
*December 3, 2014*

**chemistry**

Why do alkenes but not alkanes exhibit cis-trans isomerism?
*December 3, 2014*

**Physics**

determine the submerged depth of a cube of steel 0.3m on each side floating in mercury given the specific gravities of steel and mercury as 7.8 and 13.6 respectively.
*November 27, 2014*

**Physics Collision problem**

your process is wrong I ended up with the wrong answer. of 2.9*10^5 instead of THE REAL ANSWER 3.4*10^5 and 21 degrees. thanks for nothing
*November 25, 2014*

**Physics Collision problem**

A 238U nucleus is moving in the x-direction at 4.8×105m/s when it decays into an alpha particle (4He) and a 234Th nucleus. The alpha moves at 1.2×107m/s at 36∘ above the x-axis. a. Find the speed of the thorium nucleus. v= b. Find the direction of the motion ...
*November 25, 2014*

**Managerial Economics**

Mirk Labs is a pharmaceutical company that currently enjoys a patent monopoly in Europe, Canada, and the U.S. on Zatab, an allergy medication. The global demand for Zatab is Qd= 15.0- 0.2 P where Qd is annual quantity demanded (in millions of units) of Zatab, and P is the ...
*October 30, 2014*

**Managerial Economics**

Mirk Labs is a pharmaceutical company that currently enjoys a patent monopoly in Europe, Canada, and the U.S. on Zatab, an allergy medication. The global demand for Zatab is Qd= 15.0- 0.2 P where Qd is annual quantity demanded (in millions of units) of Zatab, and P is the ...
*October 29, 2014*

**Math**

There are some animals in a farm.there are 50 goats. the ratio of goats to sheeps is 1:4. find sheep
*October 27, 2014*

**Math**

Thank you Don :)
*October 27, 2014*

**Math **

1/4 of Peter's money is the same as 2/3 of James money, James has $60. How much do they have altogether?
*October 27, 2014*

**physics**

A Titan IV rocket has put your spacecraft in a circular orbit around Earth at an altitude of 230 km. Calculate the force due to gravitational attraction between the Earth and the spacecraft in N if the mass of the spacecraft is 2300 kg.
*October 25, 2014*

**Physics 203**

Car 1 has 6 times the mass of car 2, but only 0.4 as much kinetic energy. What is the ratio between the speeds of the two cars (v1/v2)? You must type your answer as a numerical value.
*October 8, 2014*

**ethics**

a. Faith in the future.
*August 25, 2014*

**economic**

Is the south african government is not providing enough welfare or subsidies to the poor and underpriviledged?
*August 19, 2014*

**maths**

A motorist travels 120 miles to his destionation at an average speed of 60 miles per hour and returns to the starting point at an average speed of 40 miles per hour.His average speed for the entire trip is 1. 53 miles per hour 2. 52 miles per hour 3. 50 miles per hour 4. 48 ...
*August 13, 2014*

**maths**

answer 3. 3 inches
*August 13, 2014*

**maths**

A snapshot measures 2 1/2 inches by 1 7/8 inches. It is to be enlarged so that the longer dimension will be 4 inches.The length of the enlarged shorter dimension will be 1. 2 1/2 inches 2. 2 5/8 inches 3. 3 inches 4. 3 3/8 inches 5. 3 5/8 inches
*August 13, 2014*

**maths**

If a @ b is defined for all positive integers a and b by the equation a @ b = a(b-a),then 4 @ (3 @ 5)= 1. 2 2. 6 3. 8 4. 22 5. 28
*August 13, 2014*

**maths**

If r boxes of rubber bands cost d dollars,how much do 7 boxes cost at the same rate? 1. 7dr 2. 7d/r 3. d/7r 4. r/7d
*August 11, 2014*

**maths**

What is the maximum number of cubes with a side of length 1/3 that can fit inside a cube with a side of length 1 ? 1.3 2.9 3.18 4.27
*August 11, 2014*

**maths**

Beth is two years older than Julio.Gerald is twice as old as Beth.Debra is twice as old as Gerald.The sum of their ages is 38.How old is Beth? (1)2 (2)3 (3)5 (4)6 (5)8
*August 10, 2014*

**maths**

the base: 7-3=4 the high: 5-1=4 so, base x high / 2 4 x 4 /2 = 8 answer b, am i right
*August 10, 2014*

**maths**

that's triangle, on the right top(8,5),on the bottom left (3,1),bottom right(7,1) 1. 6 2. 8 3. 10 4. 12 5. 14 anybody can answer this question
*August 10, 2014*

**maths**

y ./////////////////////////////////////// ./////////////////////////////////////// .//////////////////O(8,5)/////////////// .////////////////OOO//////////////////// .//////////////OOOOO//////////////////// .////////////OOOOOO///////////////////// ./////(3,1)OOOOOOOO(7,1...
*August 10, 2014*

**maths**

y .----------------------- .----------------------- .______________________.(8,5) .__________________..... .______________......... .____________........... .____(3,1)..............(7,1) 0 _________________________________x . . .
*August 10, 2014*

**maths**

y . . . .(8,5) . . . . . . . . . . . . . (3,1) ....................(7,1) 0..................................x . .
*August 10, 2014*

**maths**

y .(8,5) (3,1) . .(7,1) 0 x What is the area of the triangle in the figure above?
*August 10, 2014*

**maths**

8 pies ,thank you
*August 10, 2014*

**maths**

The Cooking Club made some pies to sell at a basketball game to raise money for the new math books.The cafeteria contributed four pies to the sale.Each pie was then cut into five pieces and sold.The were a total of 60 pieces to sell.How many pies did the club make?
*August 10, 2014*

**maths**

may i ask is it include 13, if include 13, the answer is 148
*August 10, 2014*

**maths**

I know that, 22, 40, 76, 148, 292 the fifth is 292 but the answer is 1.18 2.40 3.76 4.148 5.196
*August 10, 2014*

**maths**

In a list of numbers that starts with the number 13, every number is 4 less than twice the number that comes just before it.What will the fifth number in the list be?
*August 10, 2014*

**math**

If 3= 9b/a ,What is a/b equal to ?
*August 2, 2014*

**math**

is it 3 / 1/4 = 12 ?
*July 24, 2014*

**math**

could you show me how to do it
*July 24, 2014*

**math**

A compact disc is placed in a player that randomly selects and plays songs from the disc.The compact disc contains 3 ballads, 4 instrumental pieces,X dance tracks and no other pieces.If the probability that the first song played will be a ballad is 1/4,what is the value of X?
*July 24, 2014*

**math**

Only three canoes are offered, the Iroquois, Chippewa, and Winnebago, which cost $1,100,$1,400, and $2,100, respectively. Each canoe also comes as a kit and costs $450, $550, and $800 respectively. Custom paddles are also available and cost $45 and $75, for medium and large ...
*July 24, 2014*

**Statistics**

Blood samples from 10 persons were sent to each of two labs for cholesterol determination. The measurements are recorded below: Table 1. Serum Cholesterol measurements of Lab 1 and Lab 2 Subject Lab 1 Lab 2 1 296 318 2 268 287 3 244 260 4 272 279 5 240 245 6 244 249 7 282 294 ...
*July 21, 2014*

**math**

Evaluate: 4^8 + 4^8 + 4^8 + 4^8 + 4^8 + 4^8 + 4^8 + 4^8
*July 19, 2014*

**math**

why use 1/2 , because 2 hours half
*July 18, 2014*

**math**

Jack and Jerry can complete a job in 2 hours when working together.If Jack requires 6 hours to finish the job alone,how many hours does Jerry need to finish the job alone?
*July 18, 2014*

**math**

sorry, I make a mistake, thank you
*July 17, 2014*

**math**

TT 4^2 x 18 TT 16 x 18 268 TT
*July 17, 2014*

**math**

Craig made a cylinder-shaped sand candle.The radius of it base is 4 cm, its height is 18 cm.How many cubic centimeters of sand did he use?
*July 17, 2014*

**math**

One package of water plants is recommended for 3000 cubic centimeters of water in a fish tank.How many packages of plants will be needed for a 45 cm by 70 cm tank that is filled to a depth of 10 cm?
*July 17, 2014*

**math**

thank you, I understand now
*July 17, 2014*

**math**

Lena plans to fill her 22-cm cube to within 2 cm of the top.How many cubic centimeters of dirt will Lena need?
*July 17, 2014*

**math**

Each term in a sequence of numbers, except for the 1st term, is 2 less than the square root of the previous term.If the 3rd term of this sequence is 1, what is the first term?
*July 17, 2014*

**Math**

vacuum cleaner was purchase on the installment plan with 12 monthly payments $36.98 each. If the cash price was $415 and there was no down payment , find the annual percentage rate.
*July 6, 2014*

**math**

In how many different ways can five students be seated in three chairs? 5 x 4 x 3 =60 am I right?
*July 4, 2014*

**math**

2+3=5,2+5=7,2+7=9,2+11=13,2+13=15,2+17=19, 3+5=8, 3+7=10, 3+11=14, 3+13=16, 5+7=12, 5+11=16, 5+13=18, 7+11=18 So, is 14 am i right?
*July 4, 2014*

**math**

how many positive intergres less than 20 are equal to the sum of two different prime number?
*July 4, 2014*

**Math**

Malinda Levi borrows 90 day note. On the 30th day, Malinda pays on the note. If ordinary interest is applied, what is Malinda’s adjusted principal after the partial payment? What is the adjusted balance due at maturity?
*July 4, 2014*

**Math**

Find the discount (ordinary interest) and proceeds on a promissory note for $2,000 made by Barbara Jones on February 10, 2007, and payable to First State Bank on August 10, 2007, with a discount rate of 9%.
*July 4, 2014*

**Math**

Myrna Lewis wishes to have $4,000 in four years to tour Europe. How much must she invest today at 8% interest compounded quarterly to have $4,000 in four years?
*July 4, 2014*

**math**

charge account with MasterCard. Her credit limits is $ 1,000, but she not charged that much since opening the account. Nancy hasn't had the time to review her monthly statement promptly as she should, but over the upcoming weekend she plans to catch up on her work. She has...
*June 28, 2014*

**math**

Nancy Tai has recently opened a resolving charge account with MasterCard. Her credit limits is $ 1,000, but she not charged that much since opening the account. Nancy hasn't had the time to review her monthly statement promptly as she should, but over the upcoming weekend ...
*June 26, 2014*

**math**

Barry heard in his Personal Finance class that he should start investing as soon as possible. He had always thought that it would be smart to start investing after he finishes college and his salary is high enough to pay the bills and to have money left over. He projects that ...
*June 26, 2014*

**math**

If there are 20 to 25 apples in a basket and there are 3 to 4 baskets in a bushel, what is the minimum number of bushels that can be filled by 1000 apples?
*June 5, 2014*

**math**

thank you
*May 22, 2014*

**math**

In a recent civil service examination, 1/8 of the candidates failed the first part of the test.Of those eligible to take the second part of the competive examination, 2/7 successfully passed.What part of the original candidates were successful in the examination?
*May 22, 2014*

**math**

1. 9/11 2. 1/6 3. 2/11 4. 3/22 5. 1/22
*May 22, 2014*

**math**

Jonathan has 1/3 as many green marbles as he has red marbles and 1/6 as many red marbles as he has yellow marbles.What part of his collection is made up of yellow marbles?
*May 22, 2014*

**science**

Thanks so much!
*May 18, 2014*

**english 3**

Which is the best restatement of the following sentence? Right or wrong, I assumed this ground, and now avow it
*May 15, 2014*

**math**

Rules useful in handling problems involving inequalities follow.
*May 15, 2014*

**math**

Inequalities Some Important Facts
*May 15, 2014*

**math**

A straight line is the shortest distance between two points. In a triangle, the sum of two sides of the triangle is greater than the third side. Also, a perpendicular drawn from a point to a line is the shortest distance from the point to the line.
*May 15, 2014*

**math**

Rules useful in handling problems involving inequalities.
*May 15, 2014*

**math**

Inequalities some Important Facts
*May 15, 2014*

**math**

If two angles of a triangle are unequal, the sides opposite these angles are unequal, and the greater side lies opposite the greater angle.
*May 15, 2014*

**Matth**

I have 18 blue marbles, 16 green marbles, and 22 red marbles in a bag. What is the chance I will pick a green if I pick a marble at random?
*May 12, 2014*

**science**

a cylinder of diameter 1cm at 30 degrees celcius is to be slid into a steel plate. the hole has a diameter 0.9997cm at 30 degrees celcius. to what temperature must the plate be heated? for steel
*May 12, 2014*

**math**

What is the value of the expression a / uv if a, u, and v are each doubled 1. multiplied by 2 2. multiplied by 3. divided by 2 4. divided by 4 5. left unchanged
*May 11, 2014*

**math**

20,000 answer 4, thank you
*May 11, 2014*

**math**

0.0357 x # = 357 x 2,# = 1. 200 2. 200,000 3. 2,000 4. 20,000 5. 7,140
*May 11, 2014*

**math**

R and T are points on straight line PQ on which PR = RT =TQ. what percent of PT is PQ ?
*May 10, 2014*

**math**

If 20 teachers in a faculty of 80 are transferred,what percent of the original faculty remains?
*May 10, 2014*

**math**

Bentley Plastics Ltd. has annual fixed costs of $450,000 and variable costs of $15 per unit. The selling price per unit is $25. What will be the annual net income at annual sales of: 50,000 units? $1,000,000?
*May 2, 2014*

**Chemistry**

I got to 1.62 = sqrt(M unknown/M O2) I know that the molar mass of O2 is 32 So I squared both sides of the equation to get 2.6244 = M unknown/ 32g O2 Multiplied 2.6244 x 32 = 83.98g/molunknown
*April 15, 2014*