Monday

October 24, 2016
Number of results: 68,926

**math**

Tyrell says $750 is about $800.Sara says $750 is about $700.who is correct?explain.

*September 22, 2010 by joel*

**math**

tyrell says $750 is about $800. sara says $750 is about $700. who is correct? Explain.

*September 27, 2010 by sans*

**English**

1. Them are the juiciest oranges that I have ever eaten. I have to replace incorrect pronoun with correct pronoun. 1. Replace I with we

*April 12, 2011 by Hayley*

**Math**

If gas cost $3.97 per gallon, what is the cost of filling a 13.8 gallon gas tank? Do I multiply this? Is $54.78 the correct answer? Thank you

*November 3, 2011 by Samantha*

**CHEMISTRY**

Which is NOT a solution? 1 metal alloys, 2 ice in water, 3 sugar in water, 4 vinegar in water.......the answer is ice in water correct?

*November 11, 2011 by Mindy*

**grammar**

Which is the correct verbal usage of the following sentence? I let it there while I stood and applauded or I left it there while I stood and applauded?

*January 24, 2012 by Timothy*

**Declaration of independence **

In first 2 paragraphs. Of declaration. Why are governments set up? Governments are set up to secure the rights of people. Is this correct

*August 29, 2012 by Marco*

**Algebra 2**

Determine if the sequence is arithmetic, geometric, or neither. If it is arithmetic or geometric, write a rule. 4,1,0,1,4 My answer: Neither (-2)^2 (-1)^2 0^2 1^2 2^2 Is it correct?

*October 26, 2012 by Anonymous*

**Math**

Amanda says her quilt has 9 equal parts. Jeremy says it has 3 equal parts. Can they both be correct? Explain.

*January 29, 2013 by April*

**Math**

Amanda says her quilt has 9 equal parts. Jeremy says it has 3 equal parts. Can they both be correct? Explain.

*January 29, 2013 by April*

**Grammar**

Which is correct? We hadn't talked for a long time. OR We haven't talked for a long time. I think the second one.

*August 5, 2013 by Anonymous*

**Chemistry**

How many nonbonding electron pairs are in an oxygen molecule? I drew it but im unsure if Im correct in saying it has 2 nonbonding electron pairs.

*April 17, 2014 by Ally*

**look adverb and verbs**

The farmers need to water them every day is this correct answer water every day

*October 15, 2014 by sienna*

**Math Help**

Are my answers correct? Tell whether the system is inconsistent OR dependent. 1.) -7x+6y=-4 14x-12y=8 2.) 3x-y=7 -6x+2y=8 My answers: 1.) inconsistent 2.) Dependent

*March 4, 2015 by Brenna*

**reading**

What is the prefix suffix and root for the word devastation? Am i correct? Prefix- none Suffix- ion Root- devastate

*September 22, 2015 by 🐶*

**Math**

If I have to compare the below estimated quotient: 98.4/4 and 62.8/3 Would I estimate 98.4 to 98? Would I estimate 62.8 to 63? Then do: 98/4=24.5 63/3=21 So 98.4 would be greater than 62.8 Would this be correct?

*October 21, 2015 by Patrick*

**English**

Asim is my friend who is an artist.Asim who is my friend is an artist. Which sentence is correct in case of usage of adjective clause?

*July 6, 2016 by Pramatha*

**Physics/math**

A deep mountain valley is separated by two vertical cliffs. One cliff is 600 meters high and the other is 400 meters high. A cable car runs from the foot of each cliff to the top of the other cliff. At what height above the ground do the two cable cars cross? Be sure to draw a...

*September 18, 2010 by CJ*

**PreCalc - Vectors**

An airplane is flying with an airspeed of 660 Kilometers per hour. The wind is blowing from 345 degrees at 35 km/h. What direction should the airplane take so that, with the wind, the plane will be flying in a direction of 72 degrees? I can compute airspeed and actual ...

*May 3, 2011 by Joe*

**math**

the world's largest cube puzzle in Knoxville measures 6 feet on each side. The scale factor between a standard cube puzzle and largest is 1/24. Find the surface area and volume of the standard cube puzzle. Answer is 0.375ft^2/0.015625ft^3 Not sure how they figured it out i ...

*March 27, 2015 by mary*

**chemistry **

I'm confused on number 6 on the take home test. in this problem are we going to use the heat capacity of calorimeter is 2.21kJ/c. I'm confused on how to set this problem up 1)I converted 1.000kg in to grams= 1000g 2) I used q=m*c* the change in T 1000g*(4.184J/g* C)*(295.97 K...

*March 30, 2015 by Cassandra*

**calculus**

A ladder 10 ft long rests against a vertical wall. let θ be the angle between the top of the ladder and the wall and let x be the distance from the bottom of the ladder to the wall. If the bottom of the ladder slides away from the wall, how fast does x change with respect...

*October 7, 2010 by Sasha*

**Calculus**

Water is running into an open conical tank at the rate of 9 cubic feet per minute. The tank is standing inverted, and has a height of 10 feet and a base diameter of 10 feet. At what rate is the radius of the water in the tank increasing when the radius is 2 feet?

*December 14, 2015 by Lacy*

**Calculus**

An object's velocity after t seconds is v(t)= 38-2t feet per second. a. How many seconds does it take for the object to come to a stop (velocity = 0)? b. How far does the car travel during that time? c. How many seconds does it take the car to travel half the distance in part...

*April 29, 2016 by Adam*

**Pre Calculus**

Determine two coterminal angles (one positive and one negative) for θ = −503. a. 217,− 323 b. 217, − 143 c. 307, − 413 d. 127, − 323 e. 127, − 233

*July 10, 2016 by Jessica Maths*

**finance**

Not sure how to solve the following problem. Suppose two athletes sign 10-year contracts for $80 million. In one case, we're told that the $80 million will be paid in 10 equal installments. In the other case, we're told that the $80 million will be paid in 10 installments, but...

*February 25, 2008 by help*

**not sure**

Jonas Salk says: Reason alone will not serve. Intuition alone can be improved by reason, but reason alone without intuition can easily lead the wrong way. Do you agree or disagree with this statement? By the way jonas salk made the polio vaccine. I need to know your opinion ...

*January 15, 2012 by kathy*

**PLZZZZ HELP**

This question asks about your Independent Reading selection. You may use your reading selection to help you answer the question. What impact did your Independent Reading selection have on you as a reader? Would you recommend your selection to a friend? Why or why not? Support ...

*March 16, 2015 by A_person*

**Please Read**

I just wanted to say thanks to all of the teachers who help out the kids on here because without you guys we do not know where we would be. You guys take out the time of your day to help us out and I really appreciate it and I'm sure everyone else on here does also. Just ...

*April 21, 2015 by Kareemah*

**slope of a graph (physics/math)**

what would the maximum slope possible for a v vs t graph of acar released from rest on an air track elevated at one end? ~I know the track would be elevated to be straight up since it would have the most angle...but what would the slope value be? would it be 0 slope? I'm not ...

*September 21, 2007 by ~christina~*

**chemistry**

there are 5 naturally occurring isotopes of the element zinc. the relative abundance and mass of each are as follow 64 30zn=48.89% 63.929 amu 66 30zn=27.81% 65.926 67 30zn=4.11% 66.927 68 30zn = 18.57% 67.925 70 30zn = 0.62% 69.925 find the average atomic mass of zinc is it 0...

*October 29, 2010 by 000*

**calculus**

(1 pt) At noon, ship A is 50 nautical miles due west of ship B. Ship A is sailing west at 15 knots and ship B is sailing north at 21 knots. How fast (in knots) is the distance between the ships changing at 4 PM? (Note: 1 knot is a speed of 1 nautical mile per hour.)

*March 10, 2009 by bill nye*

**calculus**

At noon, ship A is 10 nautical miles due west of ship B. Ship A is sailing west at 17 knots and ship B is sailing north at 20 knots. How fast (in knots) is the distance between the ships changing at 4 PM? (Note: 1 knot is a speed of 1 nautical mile per hour.)

*September 24, 2009 by Parker*

**calculus**

At noon, ship A is 10 nautical miles due west of ship B. Ship A is sailing west at 17 knots and ship B is sailing north at 20 knots. How fast (in knots) is the distance between the ships changing at 4 PM? (Note: 1 knot is a speed of 1 nautical mile per hour.)

*September 24, 2009 by Parker*

**calculus**

At noon, ship A is 30 nautical miles due west of ship B. Ship A is sailing west at 25 knots and ship B is sailing north at 16 knots. How fast (in knots) is the distance between the ships changing at 7 PM? (Note: 1 knot is a speed of 1 nautical mile per hour.)

*October 20, 2009 by Georgia*

**calculus**

Could someone help me draw these vectors? These things confuse me. A force of 42 newtons acting on an object at an angle of 53 degrees with the ground A force of 342 lbs. acting on an object while a force of 454 pounds acts on the same object an angle of 94 degrees with the ...

*February 21, 2010 by Jim*

**Calculus**

At noon, ship A is 20 nautical miles due west of ship B. Ship A is sailing west at 23 knots and ship B is sailing north at 17 knots. How fast (in knots) is the distance between the ships changing at 5 PM? (Note: 1 knot is a speed of 1 nautical mile per hour.)

*March 1, 2010 by Samuel*

**calculus 1**

At noon, ship A is 50 nautical miles due west of ship B. Ship A is sailing west at 16 knots and ship B is sailing north at 17 knots. How fast (in knots) is the distance between the ships changing at 5 PM? (Note: 1 knot is a speed of 1 nautical mile per hour.)

*March 25, 2010 by Anonymous*

**calculus 1**

At noon, ship A is 30 nautical miles due west of ship B. Ship A is sailing west at 18 knots and ship B is sailing north at 19 knots. How fast (in knots) is the distance between the ships changing at 3 PM? (Note: 1 knot is a speed of 1 nautical mile per hour.)

*March 25, 2010 by mona*

**calculus 1**

At noon, ship A is 20 nautical miles due west of ship B. Ship A is sailing west at 21 knots and ship B is sailing north at 18 knots. How fast (in knots) is the distance between the ships changing at 5 PM? (Note: 1 knot is a speed of 1 nautical mile per hour.)

*March 25, 2010 by mona*

**Calculus**

At noon, ship A is 10 nautical miles due west of ship B. Ship A is sailing west at 19 knots and ship B is sailing north at 15 knots. How fast (in knots) is the distance between the ships changing at 4 PM? (Note: 1 knot is a speed of 1 nautical mile per hour

*April 3, 2010 by Anonymous*

**Calculus**

At noon, ship A is 10 nautical miles due west of ship B. Ship A is sailing west at 18 knots and ship B is sailing north at 22 knots. How fast (in knots) is the distance between the ships changing at 6 PM? (Note: 1 knot is a speed of 1 nautical mile per hour.)

*October 26, 2010 by Sam*

**Calculus**

At noon, ship A is 20 nautical miles due west of ship B. Ship A is sailing west at 22 knots and ship B is sailing north at 18 knots. How fast (in knots) is the distance between the ships changing at 4 PM? (Note: 1 knot is a speed of 1 nautical mile per hour.)

*October 31, 2010 by Anonymous*

**Calculus**

According to Car and Driver, an Alfa Romeo going 70 mph requires 177 feet to stop. Assuming that the stopping distance is proportional to the square of the velocity, find the stopping distance required by an Alfa Romeo going at 55 mph and at 115 mph.

*January 19, 2011 by Brittany *

**calculus**

According to Car and Driver, an Alfa Romeo going 70 mph requires 177 feet to stop. Assuming that the stopping distance is proportional to the square of the velocity, find the stopping distance required by an Alfa Romeo going at 45 mph and at 115 mph.

*January 19, 2011 by Jamie*

**CALCULUS**

At noon, ship A is 40 nautical miles due west of ship B. Ship A is sailing west at 23 knots and ship B is sailing north at 19 knots. How fast (in knots) is the distance between the ships changing at 5 PM? (Note: 1 knot is a speed of 1 nautical mile per hour.)

*October 24, 2011 by CRYSTAL*

**Calculus**

A cup has a radius of 2" at the bottom and 6" on the top. It is 10" high. 4 Minutes ago, water started pouring at 10 cubic " per minute. How fast was the water level rising 4 minutes ago? How fast is the water level rising now? What will the rate be when the glass is full?

*December 17, 2011 by Tim*

**calculus**

At noon, ship A is 30 nautical miles due west of ship B. Ship A is sailing west at 25 knots and ship B is sailing north at 25 knots. How fast (in knots) is the distance between the ships changing at 6 PM? (Note: 1 knot is a speed of 1 nautical mile per hour.)

*May 14, 2012 by remy*

**calculus**

At noon, ship A is 10 nautical miles due west of ship B. Ship A is sailing west at 15 knots and ship B is sailing north at 15 knots. How fast (in knots) is the distance between the ships changing at 3 PM? (Note: 1 knot is a speed of 1 nautical mile per hour.)

*November 4, 2012 by Anonymous*

**calculus**

At noon, ship A is 10 nautical miles due west of ship B. Ship A is sailing west at 15 knots and ship B is sailing north at 15 knots. How fast (in knots) is the distance between the ships changing at 3 PM? (Note: 1 knot is a speed of 1 nautical mile per hour.)

*November 4, 2012 by Anonymous*

**calculus**

At noon, ship A is 10 nautical miles due west of ship B. Ship A is sailing west at 15 knots and ship B is sailing north at 15 knots. How fast (in knots) is the distance between the ships changing at 3 PM? (Note: 1 knot is a speed of 1 nautical mile per hour.)

*November 4, 2012 by Anonymous*

**CALCULUS**

Sand is being poured from a converyer belt forming a conical pile whose base diameter is eual to its height at all times. If the base diameter is inreasing at 2 m/min when the base is 2 m wide. How fast is the sand being poured onto the pile?

*April 13, 2013 by y*

**Calculus**

The first boat is sailing towards the North at the speed of 6 km per hour and sees that another boat is heading east at the speed of 5 km per hour. The second boat is to the northwest of the first boat. what is the minimum distance between two boats, assuming that they do not ...

*December 3, 2013 by Jessica*

**calculus**

N(t) = 650 1+649 e−0.5 t . (You may wish to sketch a graph of N(t) to help you understand this situation and answer the questions below.) (a) How many people will have heard the rumor after 2 hours? After 12 hours? (b) When will half the people have heard the rumor? t...

*July 16, 2014 by Anonymous*

**calculus**

for f(x)=5/8, a. find an equation for the secant line through points where x=4 and x=5.b. find an equation for the line tangent to the curve when x=4. I can solve part a., but I am confused on part b. please help. I don't understand how to plug the numbers into the equation f(...

*October 26, 2014 by Duane*

**Calculus**

At noon, ship A is 50 nautical miles due west of ship B. Ship A is sailing west at 19 knots and ship B is sailing north at 24 knots. How fast (in knots) is the distance between the ships changing at 3 PM? (Note: 1 knot is a speed of 1 nautical mile per hour.)

*October 27, 2014 by Alessandra*

**Calculus 2**

Determine whether the p-series is convergent or divergent. On top of the summation sign (∑) is infinity. Under the summation sign is n=1, and right next to it (to the right of ∑ sign) is 3/n^e. I was wondering how would you start the problem from start to finish. ...

*April 25, 2015 by Sena*

**Calculus**

The Norman window illustrated below has a semicircular section on top of a rectangle. The radius of the semicircle is x. The long side of the rectangle is three times the radius of the semicircle. a)Express the total area of the window, A, as a function of x. b) Express the ...

*September 25, 2015 by Ellie*

**math**

Sum of 2 numbers =14 Difference of the numbers =40 Find the numbers. What is their difference?(show work)

*September 9, 2016 by I REMAIN ANONYMOUS *

**trig**

find the exact solutions 2cos^2x+3sinx=0 the way it stands, that is a "nasty" question. Are you sure the second term isn't 2sin(2x) ? no, its as i wrote it. then it's got me stymied, I must be missing something rather obvious, sorry! thanks for trying! 2cos^2x+3sinx=0 2-2sin^...

*April 16, 2007 by Devon*

**Human services**

Can you please explain to me what a Rite of Passage Paper is? Write a 1,400- to 1,750-word paper in which you create two modern rite of passages, one for an adolescent girl and one for an adolescent boy, that address the social demands facing adolescents today. I am just ...

*February 1, 2011 by Patiance*

**Question **

What is meant in the Illustrators Contest rules by three different subjects? Three of the same subject would be 3 illustrations of dragons. Examples of three different subjects could be dragons, space ships and an alien planet. What do they mean??? I'm a bit confused. Do ...

*December 27, 2011 by Lauren *

**Calculus**

Match each polar equation below to the best description. Each answer should be C,F,I,L,M,O,or T. DESCRIPTIONS C. Cardioid, F. Rose with four petals, I. Inwardly spiraling spiral, L. Lemacon, M. Lemniscate, O. Outwardly spiraling spiral, T. Rose with three petals 1. r=10-10sin(...

*January 28, 2010 by Salman*

**Calculus**

Match each polar equation below to the best description. Each answer should be C,F,I,L,M,O,or T. DESCRIPTIONS C. Cardioid, F. Rose with four petals, I. Inwardly spiraling spiral, L. Lemacon, M. Lemniscate, O. Outwardly spiraling spiral, T. Rose with three petals 1. r=10-10sin...

*January 29, 2010 by Salman*

**Calculus**

Match each polar equation below to the best description. Each answer should be C,F,I,L,M,O,or T. DESCRIPTIONS C. Cardioid, F. Rose with four petals, I. Inwardly spiraling spiral, L. Lemacon, M. Lemniscate, O. Outwardly spiraling spiral, T. Rose with three petals 1. r=10-10sin...

*February 1, 2010 by Salman*

**Calculus**

q 0 125 250 375 500 625 750 C'(q) 26 24 30 26 23 25 29 a) If the fixed cost is $8500, use the average of left- and right-hand sums to determine the total cost of producing 500 units. Answer: $ b) How much would the total cost increase if production were increased one unit, to ...

*November 15, 2010 by Lena*

**Calculus **

Wouldn't this sequence be neither geometric and neither arithmetic? 0.0005, 0.005, 0.05, 0.5 I can'f find a pattern. And also this sequence, it doesnt look arithmetic or geometric 1/5, 1/4, 1/3, 1/2, 1,... And also this other question: The first three terms of the sequence ...

*September 20, 2011 by Anonymous*

**calculus**

A manufacturer of hospital supplies has a uniform annual demand for 80,000 boxes of bandages. It costs $10 to store one box of bandages for one year and $160 to set up the plant for prduction. Haw many times a year should the company produce boxes of bandages in order to ...

*November 4, 2014 by Anonymous*

**calculus**

A cylindrical tank is to have a capacity of 1000 m. It is to fit into a foundry that is 12 m wide with a height of 11 m. The base of the tank will cost half as much as the top. The metal for the side of the tank will cost four fifths as much as the top. An equation that can ...

*July 22, 2015 by nal*

**calculus**

Calculate definite integral of dx/(x^4 * sqrt(x^2 + 3)) Over (1,3) I start with the substitution x = sqrt(3)*tan t so: sqrt(x^2 + 3) = sqrt(3) * sec t dx = sqrt(3) * sec^2 t dt x^4 = 9 * tan^4 t The integral simplifies to: = dt/(tan^3 t * sin t) How do I solve that?

*December 31, 2007 by mathstudent*

**Calculus**

The radius of Earth at the equator is approximately 4000 miles. Suppose a jet flies once around Earth at a speed of 5000 miles an hour relative to Earth. If the flight path is a negligible height above the equater, then among the following choices, what is the best estimate of...

*November 27, 2007 by Arnold*

**Physics. Please help**

Considering the nature of a water wave , describe the motion of a fishing float on the surface of a lake when a wave passes beneath the float. Is it really correct to say that the float bobs straight "up and down"? Explain.

*May 7, 2007 by Blessed*

**Probability**

A popular game show begins with the host reading a question to the contestants. One question involves putting four events (A, B, C and D) in chronological order. What is the probability that the contestant gets the question correct if he or she just guesses?

*March 24, 2010 by Sandy*

**Algebra**

So on this worksheet i am doing, we have to find the nth term, given "s" sub "n". I got up to the point of the quadratic, set it equal to zero, but can not find the correct factors. can anyone help? n(squared)+10n-4544=0 n(squared)-6n-420=0 n(squared)+6n-276

*June 2, 2010 by Kathleen*

**english**

Is this sentence correct? Taking care of this patient will be more exhausted than other patients because I have to provide intensive cares, such as giving a bed bath and turning the patient, and more attention to the patients safety

*September 28, 2010 by Anonymous*

**Ann**

Need to correct the punctuation for each sentence. then right if it is declarative, interrogative, imperateive, or exclamatory. 1. What a strang name that is. Answer=dec 2. Some mushrooms are very poisonous! Answer=exclamatory 3. Don't eat that mushroom! Answer=exclamtory

*May 12, 2011 by English*

**SS7R - HW Question Check**

Boston Tea Party Definition: Angry and frustrated at a new tax on tea, and dumped 342 whole crates of British tea into Boston harbor on December 16, 1773. am i correct???

*January 24, 2012 by Laruen *

**math check**

Complete the following hypothesis test: Ho: = 52, Ha: < 52, = 0.01 using the data below. 43 48 44 48 42 60 54 44 50 35 48 58 ii) Find the p-value. (Give your answer correct to four decimal places.) Incorrect: Your answer is incorrect. . 0.0928 was my answer (52-12*7.0...

*June 21, 2013 by tom9*

**Chemistry**

I am struggling in naming alkanes,alkenes,... How do you determine the parent chain? I know it is the longest chain,but there are structures that look quite complicated....the branched ones are counted...!!!! I am so confused on determining the correct parent chain!!!!!! ...

*December 21, 2013 by Anonymous*

**math**

Mrs. Sue please help! A true-false test has 12 questions. What is the probability of guessing the correct answers to all of the questions? (1 point) 1 over 4096 1 over 144 one over twenty four 1over14

*May 26, 2014 by Austin*

**Chemistry**

A 10.0-mL solution of 0.300 M NH3 is titrated with a 0.100 M HCl solution. Calculate the pH after the following additions of the HCl solution: a) 0.00 mL b) 10.0 mL c) 20.0 mL c) 30.0 mL d) 40.0 mL **I know how to solve the problem but I keep getting answers that are exactly ...

*March 21, 2015 by Sandhya*

**calculus**

If a is a vector parallel to the xy-plane and b is a vector parallel to k, determine |a ~ b| when |a| = 3 and |b| = 2. 1. |a ~ b| = −6 2. |a ~ b| = −32 3. |a ~ b| = 3 4. |a ~ b| = 32 5. |a ~ b| = 0 6. |a ~ b| = −3 7. |a ~ b| = 6

*October 27, 2010 by Bob*

**math/calculus**

let f(x)=ln(x)x>0 let k(x)= f(g(x)) and m(x)= f(g(x)) a) Find the domain of the function K(x). b) Find the domain of the function M(x). c) Find the value of k'(5)

*January 2, 2012 by angie*

**Calculus Please help!**

The differential of the function y=(x^2+6)^3 is dy=______dx. When x=2 and dx=0.05, the differential dy=_______? A) dy=______dx? B) the differential dy=_______?

*February 28, 2014 by ALI*

**Ethics in Criminal Justice**

The correlativity of rights and duties mean that: A. moral duties override moral rights. B. moral rights override moral duties. C. the existence of moral rights implies duties by which other must abide. D. None of the above. I think the answer is A but not sure.

*May 10, 2014 by Erica*

**math**

A bag of marbles contains 8 red marbles and 6 yellow marbles. Two marbles are drawn out of the bag at random without replacement. What is the probability that two red marbles are drawn out? Be sure to represent your answer as a fraction in simplest form.

*April 22, 2015 by jasmine*

**science**

Why are models useful? a) models work exactly like the things they present b) Models are the first stage in any experiment c) models are better than charts or graphs d) models are the first step in creating a prototype

*February 15, 2010 by JADEN*

**maths**

four teenagers collected a total of 64 for charity. each teenager collected a whole number of pounds. the modal amount collected was 16. the range of the amounts collected was 2. work out how much each teenager collected?

*February 15, 2011 by rose*

**calculus**

1. The demand for your hand-made skateboards in weekly sales is q = -3p + 700 if the selling price is $p. You are prepared to supply q = 2p 500 per week at price $p. At what price should you sell your skateboards so that there is neither shortage nor a surplus? -3p +700 = 2p...

*August 28, 2014 by Marianne*

**math**

Using the table (ADBC)= 8 (DACB)=5 (BADC)=3 (BDCA)=1 (DCAB)=2 (it is supposed to be a table but the table won't paste correctly). Deter mine: a) deter mine the winner using the Borda count b) deter mine the winner using the Hare method? What round did you find an answer? ...

*November 20, 2008 by jason*

**English expression**

Playing the dice game, write down suitable responses and have a conversation. (They work in pairs playing the dice game. However, they use just one die.) You work in pairs. One student should throw the die. If it has one, he should move forward one step. And place the marker ...

*March 11, 2008 by John*

**science**

How do work out what the empirical formula for aluminium selenide is? You need to provide the data. It's easier to explain with numbers than try to go through it with words. You do you not have numbers? Perhaps the question is, "How do we know what the formula of aluminum ...

*February 6, 2007 by sarah*

**Physics**

The specific heat capacity of a material is 1200 J/(kgC). The temperature of 3.0 kg of this solid material is raised by 6.0C. Ignoring the work that corresponds to the small change in the volume of the material, determine the change in the internal energy of the material. ...

*April 16, 2007 by Mary*

**chemistry**

How do you find the half-life of an element? Please explain and show me how to do this. I know the answer is 14.3 days, but I don't know how to work it. thank you! the problem is: After 42 days, a 2.0-g sample of phosphous-32 contains only 0.25g of isotope. What is the half-...

*December 13, 2007 by Ryan*

**Mathematical Studies**

A right triangle has three sides known to be (x-5) (2x+1) and 2x. By use of the pythagorean theorem show how the sides of the triangle can yield the equation: x^2-14x+24=0 this is my work below: (x-5)^2+(2x+1)^2=2x^2 which expanded is: (x^2-10x+25)+(4x^2+4x+1)=2x^2 i don't ...

*January 7, 2008 by Andre*

**Math**

I have this application that I cant figure out how to work. Please help without giving me the answer. A tree casts a shadow that measures 5 m. At the same time, a meter stick casts a shadow that is 0.4 m long. How tall is the tree?

*May 21, 2008 by Angela*

**math solvng**

if a doctor prescribes 30 units of insulin in 500 ml to be administered over 2 hours, how many drops per minute should be administered if the set is calibrated to deliver 20 drops per ml? i don't know how to get it and i need to show work...

*September 9, 2008 by trixie*

**College Algebra**

Find a linear equation in the form P = mt + b (y = mx + b), which gives the population, p, t years from 2010. This scenerio is based on a population of 6,000 in the year 2010, and increases by 200ppl every year. Please show the work too

*November 30, 2008 by Carmine*

**marketting and branding**

just failed a 3000 word essay on marketting and branding. I don't think I should have failed as I feel I covered most areas and submitted a good piece of work. can I ask for this to be double checked

*February 27, 2009 by tracy*

**English**

hi! I am doing tomorrow a chant (body parts) with young learners of english as a foreign language.They need to sing and show the mentioned body parts.Well my question is how can I work on pronunciation awareness?(what can i do beside hand clapping)

*April 16, 2009 by laxy*