Monday

April 21, 2014

April 21, 2014

Total # Posts: 98

**math**

The sum of three numbers is 92. The first number is 1/3 of the second, and the second is 2/5 of the third. What is the second number?

**calculus**

Suppose you know that a population,P, of termites is growing continuously in an exponential manner. (Use the formant P=P0e^kt) If the pest control service estimates that the number of termites will double in 6 months... A) Determine the monthly continuous population growth rat...

**Geometry 1**

Find the distance between k(9,2) and l(-3,9) to the nearest tenth

**english**

fun, kind, worried are italicized.

**english**

Complete each sentence so that the meaning of the italicized abstract word is made more concrete. (Each question is worth two points) 7. The party was a lot of fun. We 8. Tony is a kind boy who is apt to 9. That day I was so worried that I

**english**

The tried and true methods quite often can't be beat.

**Geo.**

draw two parallel lines in quadrants 1 and two that are ten blocks apart

**Chemistry- Someone please help ASAP- PLEASE**

A compound contains 38.7% K, 13.9% N, and 47.4% O by mass. What is the empirical formula of the compound?

**Physics**

A boat weighing 9.0 × 10 2 newtons requires a horizontal force of 6.0 × 10 2 newtons to move it across the water at 1.5 × 10 1 meters per second. The boat’s engine must provide energy at the rate of

**Physics**

It's actually 1J. You forgot to divide by one! Thank you!

**Physics**

A 10.-newton force is required to hold a stretched spring 0.20 meter from its rest position. What is the potential energy stored in the stretched spring?

**math**

the quotient of n and 5 is 4 times n. Write each sentence as an equation

**math**

3-y=12

**math **

the difference of y and 3 amounts to 12. Write each sentence as an equation

**math**

the quotient of four and the sum of a number and one. Use x to represent each unknown number

**math**

Write each sentence as an equation. The difference of y and 3 amounts to 12.

**math**

Use an x to represent each unknown number. Twice the sum of a number and three.

**English**

You haven't given me any ideas????

**English**

In the story Macbeth we can see that he encounter many issues. I have to write an essay picking an issue that happen in the story and than explain how it takes place in the renasssiance and than how it still happens in today's in today's society. So could I get some he...

**Math**

Please Some help me with this problem!!!!!!!!!!!!!!!!!!!!!

**Math**

Jennifer plans to fence a rectangular area around her rectangular swimming pool. The total area enclosed by the fence, including the pool, should be 5 times the area of the pool alone. The pool is 20 feet by 17 feet. A.)What is the total area enclosed by the fence? B.) fencing...

**Math**

Now it's asking. Fencing cost $8 per linear foot. Jennifer plans to build the fence so that the length of the fence will be 25 feet on the 20 foot side of the pool. What is the cost of the fencing with this plan?

**Math**

1700 sq. ft.

**Math**

Jennifer plans to fence a rectangular area around her rectangular swimming pool. The total area enclosed by the fence, including the pool, should be 5 times the area of the pool alone. The pool is 20 feet by 17 feet. What is the total area enclosed by the fence?

**ap chemistry**

there's no right ansswer

**chemistry**

a 250.0 ml sample of an aqueous solution at 25 degrees celsius contains 35.8 mg of an unknown nonelectrolyte compound. If the solution has an osmotic pressure of 11.25 mmHg, what is the molar mass of the unknown compound? I know you need to have the answer in g/mol. I have gra...

**physics**

On a banked race track, the smallest circular path on which cars can move has a radius r1 = 103 m, while the largest has a radius r2 = 157 m, as the drawing illustrates. The height of the outer wall is 18 m.

**Physics**

I am totally new to physics. We are working on summation of moments and I just am not grasping this. I know the formular is M=dF, but his does not help me. I get confused about the middle of settig of euation. I am never sure which distance I should be using. Is there a step b...

**6th grade math**

Well. First you have to find the common denominator of 16 and 4, which would be sixteen, because both 16 and 4 decide by it. So the problem would become 13/16-4/16 because 1/4 equals 4/16. The answer would be 9/16.

**Biology (Science)**

What is the biological definition of life?

**Chinese**

Yes

**algebra**

is the math statement true or false -11/8 > 23/15

**math**

during two hours at one area high school there are 3 class changes and two class periods. if the time spent in class is six less than six times the time spent changing classes, how long are the classes at this high school?

**Math**

An estate was divided among three heirs. After Andrea received 50% of the estate, her mother received 50% of what remained, leaving $20,000 for Andreas uncle. What was the total value of the estate?

**Math**

an estate was divided Among three heirs. After Andrea received 20% of the estate, her mother received 50% of what remained, leaving $20,000 for Andreas uncle. what was the total value of the estate?

**Chemisty**

Calculate the % error of an experiement if a student obtained a destiny of 1.23g/ml(predicted) and the actual value was 1.30g/ml

**Math**

The sum of two whole numbers is 9,and their positive difference is 5.what is the product of the numbers?

**Math**

What two simpler problem can you use to find 9x38?

**Math**

The sum of 25 consecutive integers is 1000. What is the smallest integer used as an addend.

**Math**

A record stores sells CDs for $12 each.A music club offers 5 free CDs and charges $15 for each additional CD.How many CDs would have to buy for cost to be the same?

**Math**

Help need equation

**Math**

Maria is three times as old as her brother.In 4 years,Maria will be twice as old as he will be then.How old is Maria's brother now?

**math**

Bryce has a handful of pennies and nickels.he counts the change and finds 4 times as many pennies than nickels.He has total of 72 cents.How many pennies does he have Can't find a equation

**Math**

Distance from x to Y is about 171 miles. This is about 189 miles less than the distance from x to z. How far is x to z if you stop in y along the way.

**math**

1.05^30

**Math**

1+1/12+1/3

**Math**

Added 5 gallons of gas tank went from 3/8 full to 7/8 how big is tank

**algebra**

detail the process of polynomial division when the divisor is a monomial. Demonstrate the process with an example. How does this process change when the divisor is not a monomial?

**Algebra**

The problem is 9x+4y=-12 x=26-5y Solve by substitution method

**MAT/116**

I have no clue as to how to put the graph on here

**MAT/116**

I was just wandering if this was correct? 1. Your company is planning to spend no less than $80,000 and no more than $100,000 on a landscaping project, which will be used as a promotional park that promotes your toaster manufacturing company. Write an inequality with a variabl...

**MAT/116**

I was just wandering if this was correct? 1. Your company is planning to spend no less than $80,000 and no more than $100,000 on a landscaping project, which will be used as a promotional park that promotes your toaster manufacturing company. Write an inequality with a variabl...

**Algebra 2**

Factor f(x)=x^4+x^3-8x^2+6x+36 completely

**math**

If 3/8 of the class was absent what % of the class was present?

**physics**

calculate the free electrons of a copper wire having a 0.064 inches diameter and 1000 ft. long?

**Math**

How to write a recursive rul for sequences. ex.) 1,3,4,7,11

**math**

determine the number of scoops per coneso each of the 88 students at an ice cream party has a different pattern of chocolate and vanilla ice-cream scoops.

**PreCal**

Let g(x)=2x+6 if k(g(x))=4x+12/3-the square root of 2x-5. Find the formula for k(x)

**physics**

50.0 kg stoplight hangs from wire over middle of an intersection. wire makes 15 degree angle with horizontal. find tension in each end of the wire

**math**

the position of an object moving in a straight line is given by s=tsquared-8t, where s is in feet and t is the time in seconds the object has been in motion. how long(to the nearest tenth)will it take the object to move 10 feet?

**math**

an observer is standing 200 meters from a hot air ballon, when is rising vertically at constant rate of 4m/sec. how fast is the angle of elevation changing 30 seconds after launch?

**math**

find the derivate of the function Y=(2x+3)^4(3x+1)^-2?

**calculus**

xy+y^2=1 find d^2/dx^2 at (0,1)

**english 1 **

The underlined statement is a prepositional phrase. Leslie stood with his back against the wall.

**physics**

i menat 4.56

**physics**

the etire beam itself is 2.46 m and the person is stading from left to right in 1.59 m

**physics**

waht is the tension of the two ropes?

**physics**

a person whos mass is 102 kg stands on a beam supported by two ropes , A and B, he is standing on one foot to help you solve this problem.

**English**

Can you suggest/comment on my poem? Death and Liquorice It is funny how everyone sees me, As a looming ghost above their head In fact we have never met before Yet they still anticipate me with dread. What I do I do as a professional Employed by the great circle of life Every h...

**English**

can you give me feedback on this poem I penned. Good or bad, I would like your opinion. Decrescendo A violin untouched for years A bow waiting to be strung Chords waiting to be played Strings waiting to be rung A door creaks open softly The timber is bathed in light The echoes...

**CheckPoint: Comprehensive Grammar CheckPoint**

And everyone who provided answers is retarded. And everyone who provided answers are retarded The assignment states a or b with answers to why The assignment states a or be with answers for why

**CheckPoint: Comprehensive Grammar CheckPoint**

"Everyone cheats at least once!" "Stop bringing us down!" What a farking loser! Are you that stupid that you must cheat on a simple grammar quiz? Why are you in college if you don't want to do the work, and you clearly don't want to learn?

**algbra**

Does anyone know the answer though

**Chemistry**

What is the stronger base, OH^- or CH30^-? I've been told the answer is the conjugate base of methanol ion but i beg to differ. THe respective pKa's of water and methanol (the conjugate acids) are 15.7 and 15.5. This would imply that out of water and methanol, methanol...

**chemistry**

How to get the hybridization of N IN NO2- ?

**chemistry**

What is dipole moment of BeCl2? and hybidization?

**french question**

Does comment vas-tu? and comment allez vous? both mean how are you doing?

**Physics**

In terms of Ohms Law (V=IR), when plotting a graph of V against I, is it safe to say that the line passes through the origin, even though 0/0 does not exist?

**Chem - DrBob222 & drwls**

Just want to say thanks to you guys for the help you gave me during the last couple of months. It was all in preparation for the National Chemistry Test and I just received word I have been selected to be in the running for the National Chem Team. Thanks again.

**Geography**

thanks

**Geography**

What is urban exclusion? I think it is the spatial restrictions imposed on certain societal groups as a result of urban expansion/development by the better off people. Am I close?

**Chemistry**

In terms of a buffer solution, can one exist with a strong acid and of weak base in equal volumes but different molarities? e.g. 0.1 HCl and 0.2 NH3? I found this to be the case but still can't find a logical reasoning behind it.

**Chemistry**

A colourless solution contains one type of ion. When one adds dilute HCl to it, a white precipitate initially forms. However, once more of the HCl solution is added, the precipitate dissolves. Explain why the ion is Pb2+ and not Al3+, Hg22+, Cu2+ nor Ag+. I know Cu2+ is not an...

**Chemistry**

Why is CH3I have a higher boiling point than CH3Cl? I thought, since Cl is more electronegative, it withdraws more electron density to its part and hence increase dipole movement within the atom and hence, requiring more energy to split them up and that implies higher boiling ...

**Chemistry**

Why does the addition of 50ml of 0.5M NaOH to 50mL of 0.6M KOH cause the pH to decrease (aka more acidic)? Because you have reduced the (OH^-) of the 0.6 M KOH by adding an equal volume of 0.5 M NaOH 50 mL x 0.6 M KOH = 30 millimols. pH = 13.78 Adding 50 mL x 0.5 M NaOH = 25 m...

**Chemistry**

Why is sulfur dioxide (SO2) a better reducing agent than carbon dioxide (CO2) or nitrogen dioxide (NO2)? I really don't know how to answer your question. It's much like asking why the sky is blue, etc. You can look up the reduction potentials of SO2 vs CO2 and NO2 and ...

**Chemistry**

50mL of 0.1M HCl is mixed with 50mL of 0.1NaOH. delta T = 3^oC. Calculate the enthalpy of neutralization per mole of HCl. assume the specific heat capcity of the solution is 4.18J/g/C and density=1.0g/mL. I tried it but got the wrong answer. What I did was I calculated the del...

**Chemistry**

Which forms the more alkaline solution and why? Al2O3; B2O3; CO2 or SiO2 Al2O3 and SiO2 are not water-soluble. CO2 forms the weak acid H2CO3, in water. What does that leave you with?

**Chemistry**

1.0L of aqueous solution in which [H2CO3]=[HCO3^-]=0.10M and has [H^+]=4.2E-7. What is the concentration of [H^+] ofter 0.005 mole of NaOH has been added? H2CO3 ==> H^+ + HCO3^- k1 = (H^+)(HCO3^-)/(H2CO3) I don't know if you are supposed to calculate or to look up k1. H...

**Chemistry**

Which would produce the greatest change in the water level in a 25mL graduated cylinder? a)7.42g of Al (d=2.70 g/mL) b)2.68g of oak (d=0.72g/mL) The answer is a) but I can't see why... It is not the total volume that counts for raising the water level, it is the volume bel...

**Inorganic Chemistry**

Which aqeuous solution has a freezing point closest to that of 0.30M C12H22O11? A) 0.075M AlCl3 B) 0.15M CuCl2 C) 0.30M NaCl D) 0.60M C6H12O6 I know the answer but I don't know the reason or rationale behind it. Please explain. I suggest you review Raoult's Law at http...

**Organic Chemistry**

Why does CH3Br react faster with hydroxyl ions (OH^-) than CH3Cl? In the halogen series, Br has a weaker bond with the CH3 than Cl. Smaller halogen atoms have a larger electron affinity to fill the outer shell. The greater tendncey of CH3Br to break up into a CH3+ ion increase...

**Chemistry**

Calculate the hydronium ion concentration in 50.0 mL of 0.10M NaH2AsO4. and we are given K1 = 6.0E-3, K2 = 1.1E-7 and K3 = 3.0E-12 I assumed these K values where given in respect to the Ka of acid H3AsO4. (H^+) = sqrt[(k2(H2AsO4^-2)+Kw)/1+(H2AsO4^-2/k1)] I think this can be si...

**Chemistry**

How can you find out how many unpaired electrons are present in gaseous Co3+ ion in its ground state? According to the NBS Circular 467 "Atomic Energy Leves", Co(3+) has 24 electrons with structure 1s(2), 2s(2), 2p(6),3s(2), 3p(6), 3d(6), and spectroscopic designatio...

**Chemistry (Thermochemistry)**

Is there any equation out there that links the change in enthalpy (H) to the change in cell potential/voltage (E)? Yes, but the relationship involves the Gibbs Free Energy, which is G = H - TS, snd S is the entropy change. The change in G is approximatly the change in H in mos...

**Chemistry Inorganic**

What rationale is there for the mixing of sulfuric acid aqueous and water being exothermic but the mixing of solid ammonium chloride with water to be endothermic? Solid NH4CL dissociates in water, and the dissociation process requires some energy, because the NH4+ - Cl- ionic ...

**Chemistry (Inorganic)**

Given the two substances Sodium Nitrate (NaNO3) and Urea ([NO2]2CO), why is it that urea has a lower boiling point? I thought that the nitrate would because urea has the double bond which makes it more stable. Urea is covalently bonded. NaNO3 is an ionic compound. Generally io...

**Chemistry**

The output of a diesel generator, which contains a mixture of CO2 and H2O gases, is collected in a sealed vessel at 447 K. As the mixture cools to 298 K, the pressure falls from 3.0 atm to 0.80 atm. What is the ratio of CO2 to H2O in the mixture? Have you tried using Avagadro&...

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