Monday

November 30, 2015
**MATHEMATIC DEPARTMENT**

The second, third and ninth terms of an arithmetic progression forms the first, second and third terms of a geometric progression. Find the common ratio and hence the eleventh term of geometric progression.
*Monday, April 20, 2015 by Mr. Bett*

**Calculus check and help**

Let f and g be the functions given by f(x)=1+sin(2x) and g(x)=e^(x/2). Let R be the shaded region in the first quadrant enclosed by the graphs of f and g. A. Find the the area of R. B. Find the value of z so that x=z cuts the solid R into two parts with equal area. C. Find the...
*Sunday, April 19, 2015 by Anonymous*

**Calculus**

Let f and g be the functions given by f(x)=1+sin(2x) and g(x)=e^(x/2). Let R be the shaded region in the first quadrant enclosed by the graphs of f and g. A. The region R is the base of a solid. For this solid, the cross sections, perpendicular to the spx-axis, are rectangles ...
*Sunday, April 19, 2015 by Anonymous*

**Vectors**

What is the nature of intersection of these three planes: 5x+3y-z=11 -2x-7y+10z=2 6x+21y-30z=-6 I know that the answer is two parallel planes and the other one intersecting in a line. my question is how would you know that the first equation intersects in a line? Would you use...
*Sunday, April 19, 2015 by Sara*

**English**

Which choice would supply the strongest, most logical support for this claim? Lakeside Manor is a wonderful new community on Lake Winchester. A. After just a few hours, you will know you want to move there. B. There is ample parking for all residents and for guests. C. ...
*Sunday, April 19, 2015 by Sarah*

**Calculus**

Let f and g be the functions given by f(x)=1+sin(2x) and g(x)=e^(x/2). Let R be the shaded region in the first quadrant enclosed by the graphs of f and g. A. Find the volume of the solid generated when R is revolved around the line y=pi. B. Fine the volume of the solid ...
*Sunday, April 19, 2015 by Anonymous*

**Calculus**

Let f and g be the functions given by f(x)=1+sin(2x) and g(x)=e^(x/2). Let R be the shaded region in the first quadrant enclosed by the graphs of f and g. A. Find the the area of R. B. Find the value of z so that x=z cuts the solid R into two parts with equal area. C. Find the...
*Sunday, April 19, 2015 by Anonymous*

**Science**

An iodoalkane A, with a molecular mass of 198, contains 30.3% carbon and 5.6% hydrogen by mass. It reacts with aqueous sodium hydroxide solution to give an alcohol which can be oxidised and with ethanolic potassium hydroxide solution to give two alkenes, neither of which show ...
*Sunday, April 19, 2015 by Fasi*

**math**

How old are they? I found this question online. Please help me understand where I may have made a mistake. Thanking you in advance. My question: Norman is now 4 times the age of her son, 3 years ago, the sum of their ages was 49. How old are they now?. My Answer: First step: (...
*Sunday, April 19, 2015 by Taywi4020*

**Error Analysis**

Please help me find the wrong grammar, word use and sentences structure for me.. *It's not essay. It's my homework from teacher to modify What can you do to reduce global warming in Thailand Global warming is big problem for the word. Now, the word want assistance from...
*Sunday, April 19, 2015 by Na*

**Art**

Image: Russian icon of saint George slaying the dragon by chrysanthos Its the first image. At the center of this textile us the large form of Sr. George, who is skating a dragon on a horse. Which of the following culturally important message does this piece communicate? A. ...
*Saturday, April 18, 2015 by Secrete Valentine*

**Sequences **

find the nth term and write an equation to express 4,36,100,196,324 so far I've got 32(n-1) + 4 but it only works for the first two . . .
*Saturday, April 18, 2015 by Lauren*

**General Physics**

A 5.00 kg howler monkey is swinging due east on a vine. It overtakes and grab onto a 6.00 kg monkey also moving east on a second vine. The first monkey is moving at 12.0 m/s at the instant I grabs the second, which is moving at 8.00 m/s. After they join on the same vine, what ...
*Saturday, April 18, 2015 by Safayia*

**Maths**

find the nth term and write an equation to express 4,36,100,196,324 so far I've got 32(n-1) + 4 but it only works for the first two . . .
*Saturday, April 18, 2015 by Chris*

**Chemistry**

4. A typical car engine produces 44,000 kJ of heat in an hour. The cooling system has a capacity of 8.40 L and is filled with a 50:50 mixture of anti-freeze (specific heat capacity of 8.37 J/g-oC, density of 1.038 g/mL). In maintaining a constant engine temperature, the ...
*Saturday, April 18, 2015 by Thomas*

**science**

A cart of weight 25 N is released at the top of an inclined plane of length 1m, which makes an angle of 30° with the ground. It rolls down the plane and hits another cart of weight 40 N at the bottom of the incline. Calculate the speed of the first cart at the bottom of ...
*Saturday, April 18, 2015 by harini*

**statistics**

Joe dealt 20 cards from a standard 52-card deck, and the number of red cards exceeded the number of black cards by 8. He reshuffled the cards and dealt 30 cards. This time, the number of red cards exceeded the number of black cards by 10. Determine which deal is closer to the ...
*Saturday, April 18, 2015 by phia*

**error analyze**

Can you check grammatical error, word use error and sentence structure error in this text? >>>This text is text, teacher to come to find the errors. I need you help just tell the error of each part. What's there? >>>Thank you<<< What can you do ...
*Saturday, April 18, 2015 by Bell*

**error analyze**

Can you check grammar error in this text? What can you do to reduce global warming in Thailand? Nowadays, The problem global warming is main problem for everybody in the world. It is effect on change of weather that the world have temperature highest. In Thailand, the problem ...
*Saturday, April 18, 2015 by Sophia*

**calc**

Suppose that an accelerating car goes from 0 mph to 58.6 mph in five seconds. Its velocity is given in the following table, converted from miles per hour to feet per second, so that all time measurements are in seconds. (Note: 1 mph is 22/15 feet per sec = 12/15 ft/s.) Find ...
*Friday, April 17, 2015 by Anonymous*

**Algebra**

Solve the equation. Use factoring or the quadratic formula, whichever is appropriate. Try factoring first. If you have any difficulty factoring, then go right to the quadratic formula. (Enter your answers as a comma-separated list.) (x+2)^2 + (x-7)(x-2)=16
*Friday, April 17, 2015 by Merty*

**Language Arts**

1. The word aloof is an English word borrowed from Dutch. Its meaning is "at a distance." In which of the following sentences is the word used correctly? Anne's sociable nature mad her aloof in new situations When he first arrived at the Secret Annex, Peter kept ...
*Friday, April 17, 2015 by Hailee*

**physics**

An elastic collision occurs between two air hockey pucks in which one puck is at rest and the other is moving with a speed of 0.7 m/s. After the collision, the puck initially in motion makes an angle of 20.00 o with its original direction, and the struck puck moves at an angle...
*Friday, April 17, 2015 by titu*

**physics**

An elastic collision occurs between two air hockey pucks in which one puck is at rest and the other is moving with a speed of 0.7 m/s. After the collision, the puck initially in motion makes an angle of 20.00 o with its original direction, and the struck puck moves at an angle...
*Friday, April 17, 2015 by titu*

**Math Help ASAP**

A movie complex has eight different movie theaters. The manager of the complex wants to conduct a survey to determine which snacks to add to the menu. Which represents the best sample the manager could use for the survey? Survey the first 100 moviegoers leaving the movie ...
*Friday, April 17, 2015 by YOLO*

**Stream Physics Hydrology - HELP!!!!**

1a) An aqueous solution containing 35 kg of endosuflan insecticide is accidentally released into a small stream. The stream dimensions are 17.5 meters wide and 1.15 meters deep. The stream velocity is 1.1 m/s. The stream channel drops 24m over a distance of 10 km. Endosuflan ...
*Friday, April 17, 2015 by Kelly*

**Accounting/Finance**

Temte Corporation is authorized to issue 1,000,000 shares of no-par common stock and 250,000 shares of 6 percent, $25 par value, cumulative preferred stock. These events affected stockholders’ equity during the first year of operations: 1. 125,000 shares of common stock ...
*Friday, April 17, 2015 by Lauren*

**Math**

1.) In the following problem, write the first five of the terms of the arithmetic sequence. a1=16.5 d=0.25 2.) Find a the correct formula for the an for the arithmetic sequence. a1=-1 d=5
*Thursday, April 16, 2015 by Lala*

**Math**

Rate varies inversely as time. Sandy rode her bicycle to Micah's house at a rate of 5 mi/h. She returned home at a rate of 4 mi/h. If the first leg of the trip took 20 minutes how long did the second leg of the trip take
*Thursday, April 16, 2015 by M*

**Math**

My problem is: "Will ran four miles on his first day of training. The next day he ran 1/3 of that distance. How far did he run the second day" I need help. I think it is either 1 or it is 3 and 1/4. I'm undecided.
*Thursday, April 16, 2015 by Keon*

**english**

Henry and Lois are discussing ways to evaluate sources. Henry maintains that one should scan a source before skimming it. Lois argues that scanning is the best first step in evaluating a source. Who is correct?
*Thursday, April 16, 2015 by yulanda*

**calculus**

The base of a solid in the xy-plane is the first-quadrant region bounded y = x and y = x2. Cross sections of the solid perpendicular to the x-axis are equilateral triangles. What is the volume, in cubic units, of the solid?
*Thursday, April 16, 2015 by Anonymous*

**Strategies for the Independent Learner**

When you approach a text, you should A. survey it, using the technique called SQ3R. B. dive right in at the first page and read the assigned section. C. skip over words you don’t know. D. read only the boldface type. 2. The proctored exams for your degree courses are A. ...
*Thursday, April 16, 2015 by Jessica*

**math**

given the equation -3x +2y =4, Write another equation that will form a linear system with: one solution, no solution and infinite solution. infinite solution: (-3x +2y =) * 3 -> -9x +6y =12 y=3/2x+4 -9x +6y =12 I think we have to multiple the first equation by non-zero ...
*Thursday, April 16, 2015 by Jay*

**College Physics**

Two cars collide at an icy intersection and stick together afterward. The first car has a mass of 1050Kg and was approaching at 8.00m/s due south. The second car has a mass of 700Kg and was approaching at 20.0m/s due west. A) Calculate the final velocity of the cars.(Note ...
*Thursday, April 16, 2015 by Josie *

**Language Arts**

1. What is one cause of the increased tension in Act 2 of The Diary of Anne Frank? Mr. Dussel to take control of the group Mr. Dussel picks on things that people care for or are sensitive about Peter is intentionally unkind to Margot and anne Mr. Frank asks Miep fro favors ...
*Thursday, April 16, 2015 by Hailee*

**science**

What do bone marrow (the soft connective tissue that fills the internal spaces in bone) and the dermis (layer of the skin under the epidermis and over the hypodermis) have in common? (1 point) • They are both sites of new cell formation. • They both contain or are ...
*Thursday, April 16, 2015 by kkkk*

**calc(very urgent)**

Imagine a flat-bottomed cylinderal container with a circular cross section of radius 4 in. a marble with radius 0<r<4 inches is placed in the bottom of the can. what is the radius of the bottom that requires the most water to cover it. (include first or second derivative...
*Thursday, April 16, 2015 by May*

**please help! someone plz**

Imagine a flat-bottomed cylinderal container with a circular cross section of radius 4 in. a marble with radius 0<r<4 inches is placed in the bottom of the can. what is the radius of the bottom that requires the most water to cover it. (include first or second derivative...
*Thursday, April 16, 2015 by May*

**algebra**

what is the first step when solving x/15=3/5? write a proportion using an unknown value x and the ratio 5:6 then solve it. in an orchestra, the ratio of trombones to violas is 1 to 3. a. there are 9 violas. write a proportion that gives the number t of trombones in the ...
*Wednesday, April 15, 2015 by phan*

**Math (ASAP)**

Write out the first 4 terms of the following sequence that is define recursively. a1=32 ak+1=1/2ak
*Wednesday, April 15, 2015 by Gigi*

**chemistry**

A compound has 85 % tin and 15% antimony. How many grams of antimony will be in 50. grams of the compound. My question is do I need to calculate the empirical formula first to do thi? I'm not sure where to start.
*Wednesday, April 15, 2015 by Tina*

**math **

Imagine a flat-bottomed cylinderal container with a circular cross section of radius 4 in. a marble with radius 0<r<4 inches is placed in the bottom of the can. what is the radius of the bottom that requires the most water to cover it. (include first or second derivative...
*Wednesday, April 15, 2015 by Linda*

**calculus (optimization prob help!)**

Imagine a flat-bottomed cylinderal container with a circular cross section of radius 4 in. a marble with radius 0<r<4 inches is placed in the bottom of the can. what is the radius of the bottom that requires the most water to cover it. (include first or second derivative...
*Wednesday, April 15, 2015 by Linda*

**math**

The batting averages of the first three batters in the Eureka College women’s softball team lineup are .310, .301, and .277. If the first three batters are considered as the “lead-off group”, what is the batting average of the group? A. .301 B. .296 C. There is ...
*Wednesday, April 15, 2015 by Jane*

**Math (ASAP)**

Write out the first 4 terms of the following sequence that is define recursively. a1=32 ak+1=1/2ak
*Wednesday, April 15, 2015 by Gigi*

**Chemistry**

Suppose you are assigned to prepare a buffer of 0.10M HNO2 (Ka=1.7 x 10^-4) and 0.10M NaNO2 by mixing equal volumes of both solutions. What is the pH of the resultant solution? How would I first start this question? I have no clue what the steps are to be frank.
*Wednesday, April 15, 2015 by Janice*

**Science/Physics **

My question is you walk 3.9 kilometers to school. In gym, you do the 12 minute run and actually make it 2.4 kilometers. After school you walk your friend home first and then go home it is 3.1 kilometers farther than your morning walk to school. What was your total distance ...
*Wednesday, April 15, 2015 by Jenna*

**writting skills**

1. Which one of the following comes first in an online catalog entry? A. Title of the book B. Year of publication C. Call number of the book D. Author's last name Student Answer: B Answer: Incorrect Reference: 2. You've located three books on a topic you're ...
*Wednesday, April 15, 2015 by TYondra*

**english**

Hello I am having quite a bit of trouble trying to figure out a better way to answer this. 1. In the video, The Fates Present: Pyramus & Thisbe,There are parts of the animated version in which there is a character, who appears at the beginning of the animation first, and who ...
*Wednesday, April 15, 2015 by Sabrina *

**science **

1. What do bone marrow and the epidermis have in common? They are both sites of new cell formation. They both contain structures that assist the body in cooling down if overheating occurs. They both contain or are associated with sensory neurons. They are both involved in ...
*Wednesday, April 15, 2015 by amy*

**6th Grade Science Experiment**

Hi, forget my first post. Can someone please explain what a dependent and independent variable is? Thanks and I don't have too much time either.
*Wednesday, April 15, 2015 by MusicLover14*

**statistics**

A tennis player makes a successful first serve 51% of the time. if she serves 9 times, what is the probability that she gets exactly 3 first serves in? assume that each serve is independent of the others.
*Wednesday, April 15, 2015 by Anonymous*

**Math**

How would you fine the relative extrema of f(x)=x+8^-x ? I know the first step is to find the derivative, which when I did I got f'(x)=1+[(-1)(ln(8))(8^-x)] Did I find the derivative correctly? And if I did, how do I find the zeroes of that??
*Tuesday, April 14, 2015 by Jackie*

**6th grade math**

While battling a forest fire , Samuel was only able to get three hours of sleep during the first day. What was the percent of the day was Sam awake F. 87.5% G. 37.5% H. 90% J. 10%
*Tuesday, April 14, 2015 by Alex*

**calculus multiple choice**

1.The region in the first quadrant bounded by the x-axis, the line x = ln(π), and the curve y = sin(e^x) is rotated about the x-axis. What is the volume of the generated solid? a: 0.906 b:0.795 c:2.846 d: 2.498 2.Find the average value of f(x)=2/x over the interval [1, 3...
*Tuesday, April 14, 2015 by Anonymous*

**Chemistry**

when titrating 50 mL of .10M H2SO45 with .10 M NaOH, how many mL of NaOH will you have added to reach first equivalence point?
*Tuesday, April 14, 2015 by Kay*

**Chemistry**

I am working on a five-part question and I just need help with the last part. I'm not sure where to begin with that one. I pasted the question and answers (for a-d) to the other parts below. Thank you! Consider the proposed mechanism for the reaction between nitrogen ...
*Tuesday, April 14, 2015 by Lisa*

**math**

find the first 3 term s of an arithmetic sequence in which the 21 term is -54 and the fifteenth term is -170
*Tuesday, April 14, 2015 by Anonymous*

**Math**

Neil needs to cut 3 long boards into 9 smaller boards. The first is 10 ft, the second is 16 ft, and third is 18 ft. The table lists the smaller boards Neil needs. Use a drawing to show how he can divide the 3 boards so there is no waste.
*Tuesday, April 14, 2015 by Mimi*

**math**

Neil needs to cut 3 long boards into 9 smaller boards. The first is 10 ft, the second is 16 ft, and the third is 18 ft. The table lists the smaller boards Neil needs. Use a drawing to show how he can divide the 3 boards so there is no waste. Length of board Number needed 4 ft ...
*Tuesday, April 14, 2015 by Mimi*

**Maths**

Two flares are launched from a life raft. The height h of the first flare in metres above the sea is modelled by the formula h1= t2+t+1meters,and the second flare is h2=4-t where t is the time 12 in seconds after the flare is launched. Determine (i) Time taken and (ii) Height ...
*Tuesday, April 14, 2015 by Baz*

**Physics**

A train accelerates from the rest at the station A at a rate of 0.8 m/s2 for 25 s, the travels at constant velocity for 77.5 s before it comes to rest at the station B after period of retardation lasting 20 s. What is the distance between stations A and B, and the average ...
*Tuesday, April 14, 2015 by Albert*

**physics**

Choose one of the Laws of Thermodynamics (zeroth, first, second, or third) and give a brief summary of its development. Who is credited with "discovering" it and when? How did the four laws come to be ordered as they are? Please explain in detail
*Tuesday, April 14, 2015 by liz*

**physics**

A particle starts moving from rest with uniform acceleration.It travels a distance x in first 2 sec and a distance y in the next 2 sec.Then Answer) y=3x
*Tuesday, April 14, 2015 by AVINAV KUMAR CHOURASIA*

**L.A**

The word aloof is an English word borrowed from Dutch. It's meaning is "at a distance". In which of the following sentences is the word used correctly? A. Anne's sociable nature made her aloof in new situations. B. When he first arrived at the secrete Annex, ...
*Tuesday, April 14, 2015 by Dawn*

**calculus**

The base of a solid is the region in the first quadrant bounded by the graph of y = 3/(e^x) , the x-axis, the y-axis, and the line x=2. Each cross section of this solid perpendicular to the x-axis is a square. What is the volume of the solid?
*Monday, April 13, 2015 by sss*

**Mia**

A Screamingly Good Science Lesson Elizabeth Kibler 1Amusement park rides give us thrills, exhilaration, and delight. If you pay attention, these rides can give you something else—a science lesson. Roller coasters are amazing rides that can twist and veer until you scream...
*Monday, April 13, 2015 by English*

**math**

A professor gave his 40 students a test with three questions. Every student answered at least one question. Ten student did not answer the first question, 14 did not answer the second question, and 12 did not answer the third question. If 18 students answered all three ...
*Monday, April 13, 2015 by Excel*

**criminal justice**

In 1970, the District of Columbia passed the first __________ statute which authorized denial of bail to "dangerous" persons charged with certain offenses for up to 60 days.
*Monday, April 13, 2015 by Heather*

**Algebra**

How do I answer this? Robert needs to cut four shelves from a board that is 2.5 meters long. The second shelf is 18 centimeters longer than twice the length of the first shelf. The third shelf is 12 centimeters shorter than the first shelf. The remaining shelf is 4 centimeters...
*Monday, April 13, 2015 by Ruth*

**Physics**

Ann, Sam and you take a trip to the orbiting International Space Station, bringing along a hula hoop that is 1.02 m in diameter (= 2R) and has a mass Mh = 2.0 kg. You are watching from a viewport while Sam and Ann go outside for a (space) walk. You see both Sam and Ann ...
*Monday, April 13, 2015 by Spencer*

**Statistics **

I'm stuck on this homework question. If someone can just help get me started with the first one I'm sure I can do the rest. I'm just not sure how to begin. Thanks! 1. A production process produces 90% non-defective parts. A sample of 10 parts from the production ...
*Sunday, April 12, 2015 by Emily*

**social studies 8th**

1. What was the cause of American leaders’ initial refusal to enter World War I? (1 point) They wanted to maintain the country’s isolationist policy.*** They were not certain the country had the resources to fight. The United States did not wish to side with the ...
*Sunday, April 12, 2015 by XenaGonzalez*

**Pre-calculus **

The sum of the first two terms of an arithmetic series is 13 and the sum of the four terms is 46. Determine the first six terms of the series and the sum of the first six terms.
*Sunday, April 12, 2015 by Tawana *

**physics- Space**

How does the amount of dark matter in the Universe compare to the amount of ordinary matter? In what way is dark matter similar to ordinary matter? In what way are they different? I got the first one which dark matter is 23% of the universe. But for the other questions, the ...
*Sunday, April 12, 2015 by Anonymous*

**Maths help **

Two flares are launched from a life raft. The height h of the first flare in metres above the sea is modelled by the formula h1= t2+t+1meters,and the second flare is h2=4-t where t is the time 12 in seconds after the flare is launched. Determine (i) Time taken and (ii) Height ...
*Sunday, April 12, 2015 by Ryan*

**Math**

As of the 2012 Summer Olympics, the world record for women's long jump is 24 feet, 8 inches. How much longer is the world record than Sheila's first jump? Express your answer in yards. Sheila first jump measured 3 yards, 2 feet, 8 inches. Do I convert to inches or ...
*Saturday, April 11, 2015 by AC*

**business mgmt**

A company looking for venture capitalist funding is deciding on the design of its operating system for its new phone. The first option is to simply buy the OS from another company. This would result in sales of either 10,000 units if the market is not crowded with similar ...
*Saturday, April 11, 2015 by jeannie*

**MATHSS PLESE HELP**

Two flares are launched from a life raft. The height h of the first flare in metres above the sea is modelled by the formula h1= t2+t+1meters,and the second flare is h2=4-t where t is the time 12 in seconds after the flare is launched. Determine (i) Time taken and (ii) Height ...
*Saturday, April 11, 2015 by VINNY*

**algebra**

find 3 consecutive integers such that the sum of the squares of the first and second is 2 more than the third
*Friday, April 10, 2015 by luke*

**Math**

As of the 2012 Summer Olympics, the world record for women's long jump is 24 feet, 8 inches. How much longer is the world record than Sheila's first jump? Express your answer in yards. Sheila first jump measured 3 yards, 2 feet, 8 inches. Do I convert to inches or yards
*Friday, April 10, 2015 by AC*

**Math**

A manufacturer has determined that the weekly profit from the sale of x items is given by the function below. It is estimated that after t days in an week, x items will have been produced. Find the rate of change of profit with respect to time at the end of 7 days. P9x) = -x^2...
*Friday, April 10, 2015 by Stacey *

**Math Homework**

Sheila's first jump was 3 yards 2 feet 8 inches her second was 2 yards 1 foot 10 inches how much longer was her first jump? express your answer in inches I'm having a hard time setting this up
*Friday, April 10, 2015 by AC*

**Finance**

A bank is willing to give you a Rs1,000,000 home mortgage at 12% interest, compounded semiannually. The loan will be amortised over 25 years, but the interest rate is fixed for only the first 5 years. What is the monthly mortgage payment for the first five years? Rs 1000,000...
*Friday, April 10, 2015 by Anonymous*

**statistics**

A nutritionist wants to conduct a study to validate the efficacy of an herb as an aid in weight loss. She randomly assigns half of a group of overweight persons to a treatment group who are given the herb with instructions for its use and a planned diet for six weeks. The ...
*Friday, April 10, 2015 by phia*

**physics**

a car moves from A to B covering a distance of 1000km it covers the first 300km at 60km/h the next 400km at 80 km /h at what speed it should it cover the remaining distance so that achieve an average speed of 70km/h?
*Friday, April 10, 2015 by jhanvi*

**physics**

a car moves from car A to B covering a distance of 600km/h if it covers first 400km at 80km/h and the other remaining at 100km/h .What is the average speed for entire journey
*Friday, April 10, 2015 by jhanvi*

**Calculus**

During a certain epidemic, the number of people that are infected at any time increases at rate proportional to the number of people that are infected at that time. 1,000 people are infected when the epidemic is first discovered, and 1,200 are infected 7 days later. Write and ...
*Thursday, April 9, 2015 by Anonymous*

**Math**

A manufacturer has determined that the weekly profit from the sale of x items is given by the function below. It is estimated that after t days in an week, x items will have been produced. Find the rate of change of profit with respect to time at the end of 7 days. P9x) = -x^2...
*Thursday, April 9, 2015 by Stacey *

**English**

Which of the following correctly uses a transitional word or phrase? A. First impressions are so important in both personal and professional life. Addison shaved off his beard. B. Kara has been happily trying lots of new activities lately. For example, she took up needlepoint ...
*Thursday, April 9, 2015 by Diana*

**maths**

A G.P had its third term as 9 times its first term and its second term is one-twenty-fourth of its fifth term. what is its fourth term?
*Thursday, April 9, 2015 by bengazi*

**Calculus**

A manufacturer has determined that the weekly profit from the sale of x items is given by the function below. It is estimated that after t days in an week, x items will have been produced. Find the rate of change of profit with respect to time at the end of 7 days. P9x) = -x^2...
*Thursday, April 9, 2015 by Stacey *

**algebra**

How do I state which property of exponents justifies each step of this simplification?: 3^2x^6z^10/2^2y^18*x^4y^4z^4/5z^3*27z^6/2^2x^2y^3 Im really stuck on this problem, I've managed to figure out the first 5 problems but this one is troubling me.
*Thursday, April 9, 2015 by Maggie*

**math**

The 1st,5th,13th term of an arithmetic sequence are the first 3 terms of geometric sequence with a common ratio of 2. If the 21st term of the arithmetic sequence is 72, calculate the sum of the first 10 terms of the geometric sequence.
*Thursday, April 9, 2015 by zack*

**Calc AB**

Remember that f(x) must be one-to-one (only one y-value for each x-value) over the domain where f –1(x)is defined as a function. So, in some cases you must restrict the domain of f(x) so that it's one-to-one. There might be more than one section of domain that's ...
*Thursday, April 9, 2015 by Thomas*

**Chem**

If a .750g sample of magnesium chloride is dissolved in water and then treated with a silver nitrate solution how many grams of silver chloride should be collected? I don't understand what my first step should be. The balanced equation is MgCl2+2AgNO3=2AgCl+Mg (NO3)2 Do I ...
*Thursday, April 9, 2015 by Maddy*

**physics**

An object is released from rest at an unknown height h above the ground. One second later a second object is released from rest at the same height. When the first object strikes the ground, the second is 20 m above the ground. What is the initial height h?
*Wednesday, April 8, 2015 by jon*

**History**

The question is based on "Democracy in America" by Alexis de Tocqueville: "Although private interest directs the greater part of human actions in the United States as well as elsewhere, it does not regulate them all. I must say that I have often seen Americans ...
*Wednesday, April 8, 2015 by Nadia*

**Accounting**

Adelphia Corporation, which uses absorption costing, just completed its first year of operations. Planned and actual production equaled 13,000 units, and sales totaled 11,700 units at $184 per unit. Cost data for the year are as follows: Direct material (per unit) $ 37 ...
*Wednesday, April 8, 2015 by Sarah*