Matt

This page lists questions and answers that were posted by visitors named Matt.

Questions

The following questions were asked by visitors named Matt.

Why does something acid based disolve something carbon based? What makes you think this is a solubility rule? I can think of hundreds of exceptions. Carbon disulfide in aqueous solutions of acids, carbon tetrachloride in HCl, etc.

give exact value of cos 75 degrees. give exact value sin 15 degrees. give exact value sin 225 degrees. You will have to use the addition relations here. Notice 75 is 30 +45, 15 is 45-30, and 225 is 180 + 45. I will be happy to critique your work.

A sign on the gas pump of a certain chain of gasoline stations encourages customers to have their oil checked, claiming that one out of every four cars should have its oil topped up. What is the probability that exactly 3 of the next 10 cars entering a st...

Any help would be much appreciated with the steps involved in each problem given. Thank you. 1) Find derivative if y =cot x + sin x 2) Find derivative if y = (3x+5)^8 3) Find derivative if y = x csc x 4) Find derivative if y = x ã3x + 1 (3x + 1 is under...

What volume of helium would be in a baloon the size of a soft drink? The same volume that the soft drink occupies.

In the following statements what are the dependent and independent variables? a. Increased education results in decreased racial/ethnic prejudice. b. The greatest indicator of college attendance is family income, not intelligence. c. Because of hasty and...

Joe has freckles but Sue does not. Both have attached earlobes. Some of their children do not have freckles. Freckles and earlobes are inherited independently. What is Joe's genotype? What is Sue's genotype? What is the chance that their next child will h...

Where there toilets in the middle ages?

A particular gas has a desnity of 11.98 g/dm^3 when the pressure is 138.4 kPa at a temp of 175 degrees F. What is the GMW of this gas? If it is a diatomic gas can you identify the element? dm^3 = L. so it's 11.98 g/L. then i converted 139.4 kPa to 1.37 at...

Explain this quote, "The first lesson in history in modesty."

A gallon of paint can cover an area of 385 square feet. How thick is the coat of paint in inches. HELP PLEASE!!! thanks

The different wallpaper groups?

The number of stages, including the prologue, in the 2005 Tour de France?

The largest integer that is not a sum of distinct powers?

The number of frieze patterns?

The base for the hexadecimal system?

The value of a score (as in "four score and seven years ago").

One of two numbers that can be both the area and perimeter of a triangle whose side lengths are a Pythagorean triple?

The number of months in the Julian calender?

What is the difference between height and elevation?

A number that is neither prime nor the sum of two distinct primes?

The Pythagorean masculine marriage number?

The larger number of the fourth set of twin primes?

Any help would be much appreciated with the steps involved in each problem given. Thank you. 1) Find derivative if y =cot x + sin x 2) Find derivative if y = (3x+5)^8 3) Find derivative if y = x csc x 4) Find derivative if y = x ã3x + 1 (3x + 1 is under...

how do you simplify and combine like terms for this 4(x+5)+3x squared+6(x+1)

Harry has 3 sisters amd 5 brothers. His sister Harriet has a S sisters and B brothers. What is the product of S and B? (A) 8 (B) 10 (C) 12 (D) 15 (E) 18

When Rachel divides her favorite number by 7, she gets a remainder of 5. What will the remainder be if she multiplies her favorite number by 5 and then divides by 7?

Four red balls and two white balls are placed in a jar. One ball is randomly removed and replaced with a ball of the other color. The jar is then shaken, and one ball is randomly selected. What is the probability that this ball is red? Express your answer...

If 2 to the 1998 power - 2 to the 1997 power - 2 to the 1996 power + 2 to the 1995 power = k times 2 to the 1995 power, what is the value of k? (A) 1 (B) 2 (C) 3 (D) 4 (E) 5

If a, b, and c are digits for which 7 a 2 -4 8 b ========= c 7 3 then a + b + b = _______ (A) 14 (B) 15 (C) 16 (D) 17 (E) 18

Find the derivative if y^3 + y = 2cosx

Find the derivative if x^3 + 4xy^2 - y^4 = 7

Find the derivative if y=sin^-1 (3x)

Find the derivative if y=sec^-1 (x+3) Please any help.

Find the derivative if y=x^1+sqrt2

Find the derivative if y=e^(2x)-lnx^(2) Im stuck, all i have is 2e^(2x)-2/x

Fnd the derivative if y=x^(1+sqrt2) Is this right (1+sqrt2)/(x) x^(sqrt2)

Find an equation for the tangent and normal to the curve x^2+y^2=9 at x=1 Do you have to simplify the problem to get y on one side. or is your u=x^2 v=y^2 du=2x dv=2y if so then what next?

I just want to make sure im right. Find the derivative if y= arcsec(x+3). I got 1 ======================= |x+3|sqrt(x+3)^(2)-1 Is this the final answer or do you need to solve (x+3)^2 and get (x^(2) + 9x + 9)

the derivative of cot^3sqrtx Do you use prduct rule, if so what is your u,v, dv, or du.

Why does Emperor Justinian outlaw Greek Philosophy in 529 AD?????

how can I calculate this deriivative: 1/(sin(x-sinx))?

2. aren't your x and y intercepts the base and height of your triangle?? take area = 1/2 base*height = ..... = c which is the constant of the original equation!!! for this, you get 2c?

I have no idea where to start? A survey of one thousand people found that 70% of the people have a CD player, 85% have a telephone, and 45.2% have a computer. At least how many people have all three objects?

Tried this problem severeal ways. Get a different answer every time, but it is in the same ballpark. Any help would be much appreciated. How many zeros are at the end of the product of the first fifty positive integers?

There is this bonus that I need so bad for my grade. I have tried several ways to answer this question and have tried several equations. Please Help Bouquets are priced on the basis of the numbers and types of flowers used. What is the price of the fourth...

Form two four-digit numbers from the digits 2, 3, 4, 5, 6, 7, 8, and 9, using each digit exactly once, so that the absolute value of the difference of the two numbers is as small as possible. Confused need to double check with you all.

A survey of one thousand people found that 70% of the people have a CD player, 85% have a telephone, and 45.2% have a computer. At least how many people have all three objects? Is the answer 258, because that's what I keep getting?

Form two four-digit numbers from the digits 2, 3, 4, 5, 6, 7, 8, and 9, using each digit exactly once, so that the absolute value of the difference of the two numbers is as small as possible. I don't know where to start, any help would be greatly apprecit...

The graph of y = cos x is concave down on which interval? (-pi,0)??????? please help!!!!

Calculate the molar solubilty of CaC2O4 in a solution that has been buffered to a pH of 4.00 Remember to account for reactions involving H2C2O4 acting as an acid in water. To account for the buffer, simply assume that H+ = 1.00X 10^-4

A sample of 1.029g of KC8H5O4 was titrated with an NAOH solution of unknown concentration. If 22.83 mL of base was used to reach the endpoint, what was the concentration of NaOH? What mass of KC8H5O4 should be used such that a volume of NaOH between 35-40...

When 2.47 g of chromium is reacted with an excess of sulphur, the compound Cr2S3 results. Treating the Cr2S3 so formed with strontium metal converts all of the sulphur to SrS. Reacting the SrS with sodium metal then converts all the SrS to Na2S. What mass...

Please help! I need a case of scientific fraud where the scientist was working alone and unwilling to cooperate/get reviewed by other scientists. (the standard of openness must apply) goggle doesnt help at all, as my case is so specific!

I need to find detailed information on Charles Darwin, specifically, about his results and the RELIGIOUS PERSECUTION involved with it. Thanks in advance!

Persuasive speech comparing old to modern games? I have to have a persuasive speech lasting 8-10 minutes, in which i am trying to persuade the listeners that modern games have came away from the "point" of a video game. and that old school games like SNES...

Rank the following compounds in order of increasing acid strength (1 = weakest, 4 = strongest) HCOOH CH2ClCOOH CHCl2COOH CH3COOH

why is it wrong to teach creationism in a high school science class, based on the moral theory that the good of many outweigh the good of the individual? and im asking your personal opinion on this, im perfectly capable of going to google and typing in fe...

How do I solve -3p^2+66p=0

How do you measure velocity???????

Can you help me to understand what is the role of power in the control process? I am not even really sure I understand what the question is asking

Use iteration to guess an explicit formula for the sequence. Pk=Pk-1+2*3^k P1=2

Prove that a simple graph with n >_ 2 vertices must have atleast two vertices with the same degree. There was a hint given in the book saying that the key to this is the graph can not have both a vertex of 0 degree and a vertex of n-1 degree Thanks

Suppose that Quebec had managed to succeed from Canada and became an independent country. Just to be difficult, they decreed that they will only measure pressure in mm Hg and volume in cm3. What value for R, the ideal gas constant, would students in Quebe...

A 1.00 L flask containing 450 torr of H2 is connected to and mixed with a second flask with a volume of 0.500 L containing 250 torr N2. What is the final pressure of the resulting mixed gas system? a) 250 torr b)383 torr c) 450 torr d) 575 torr e) it cann...

What two ways can waves interact? ^I have no clue what its asking

From the perspective of a caregiver, would you prefer traditional insurance or one of the managed care options (HMO,PPO) and why? I need direct answers please, I'm not a health-care professional or caregiver, so I don't know which to choose.

Suppose that sunlight falls both on a pair of reading glasses and on a pair of dark sunglasses. Which pair of glasses would you expect to become warmer?

The radiation curve of the sun shows that the brightest light fro the sun is yellow- green. Why, then, do we see the Sun as whitish instead of yellow green?

List the first eight prime numbers.

For a velocity-time graph, what does the "tangent line of the curve" represent?

Hey Everyone I was wondering how I could write the condensed structural formula for the following organic chemicals: 1. 2,3-dimethyl-2-butene 2. 4-ethyl-2-hexyne 3. 3,3,6-trimethylnonane 4. 3-ethyl-4-prophylheptane 5. 3-octanol 6. 2-methyl-2-pentene 7. 5-...

How do i express angles in a radian measure as multiples of pi. For example, suppose i have an angle of 30 degrees, and a angle of -270 degrees. How would I express them in a radian measure as a multiple of pi?. Thanks.

In a class discussion, my teacher told me that 74.06% of the volume of each unit cell is occupied by atoms (in the cubic closest structure). Where does this percentage come from? How can I find it?

Why can Copper have both a +1 and +2 oxidation state?

I posted this several days ago but it hasn't been answered and I still can't figure it out: For which values of r does the function defined by y=e^(rt) satisfy the differential equation y''+ y'-6y = 0

Ok, so I've been really busy with midterms and my chemistry one is tomorrow. Now, I never intended to let so much time slip by before i started studying, but it happened. It's one of my most important exams. Do I still have a chance of passing? If so, how...

A 8.90-g sample of ethane, C2H6, is mixed with 18.8 atm of O2 (an excess) in a 1.50 L combustion chamber at 130.0°C. The combustion reaction to CO2 and H2O is initiated and the vessel is cooled back to 130.0°C. What is the final pressure in the combustion...

A sample of Kr gas has a volume of 465 mL at 286°C and 844 torr. When the gas is cooled by 38.3°C, its volume is reduced by 0.572 mL. What is the final pressure of the gas in kPa? the answer is supposed to be 105 but i keep getting 49.9!!!!!!

the chemistry question: v=0.465L T=559.15K P=112.496 kPa Pv/t = Pv/t 112.kpa(0.465)/559.15 = (x)(0.464428)/(247.8) x= 49.9 kPa ...i skipped conversion steps, but i'm pretty sure i did those right..

A glass vessel has a mass of 53.8718 g when evacuated (no air). When filled with a liquid of density 1.319 g mL-1 it has a mass of 255.7390 g and when filled with an unknown gas at 752.3 torr and 16.12°C it has a mass of 54.2483 g. What is the molar mass...

what type of cubic structure is iron?

Hey, can you help me balance this equation? Cu2S + HNO3 --> Cu(NO3)2 + CuSO4 + NO2 +H2O Thanks!

SImplify: (x - 9/x) / (1 + x/3) and (m^-1 + n^-1) / (m^-3 + n^-3) I have no idea what to do

What is a square mesh with a fiber center used for support? 9 letters, ends with an E What is a porcelain container used to heat things? 8 letters, second letter is "R" What type of bottle is used for storing acids and bases? 7 letters, _E_G_ _T Help? Tha...

What are electrolytic lesions in terms of psychology and the brain? I can't find it anywhere and I don't know what it means...

Calculate ∆G (in kJ) at 541 K for the following reaction under the given conditions. Use data obtained from the table below and assume that ∆Hfo and So do not vary with temperature. Report your answer to three significant figures in scientific notation (i...

What is the integral of cos^6x? I tried half angle identities but it didn't really help...

Could I please have an example of a everday experience of a chemical process for which a rate increases with temperature? I thought of ice melting but its a physical change...

The current research project involves examining the photoreceptors of the fruit fly, Drosophila Melanogaster. Over the last 6 weeks, I have been spending about 2 hours a week working with a program called ImageJ and various slices of photoreceptor cells o...

Vinegar is a 5.0% solution by weight of acetic acid in water. Given that the pH for vinegar is 2.41 and that Ka= 1.8E-5 and the density s 1.00g/mL, what is the percent dissociation of acetic acid in vinegar? I know the % dissociation equals the amount whi...

Solve the problem. Assume that simple interest is being calculated. Round your answer to the nearest cent. Susie borrowed $7500. from a bank for 18 months with interest of 5% per year. Find the total amount she repaid on the due date of the loan. (Use: I=...

Could someone explain how to distinguish improper integrals in non-mathematical terms so I may understand? Thanks!

I need an iambic pentameter poem that sounds like guy has written it. Also to be about school.

I seem to be having problems setting up Linear Programming questions. For example: Kustom Kars does van conversions. The Custom conversion required 15 hours of shop time, 8 hours of painting time, and 1 hour of inspection time. The Deluxe conversion requi...

I am thinking about going back to college and taking online math classes. I am eligible to take either financial mathmatics or contemporary math. But I am not really sure what the difference is between them. Is there one that is more easy than the other?

Hey can you help me out with these questions? What is the separation of homologous chromosomes during Anaphase I of meiosis called? What is the animal secretion serving as communication between members if the same species? Thanks?

Liquid Chromatography lab: Why is it important that the solvent level not drop below the upper level of the stationary phase once the stationary phase is packed in the column. is it because if the stationary phase dries out, then the mixture will be perma...

You expect to get forty miles to the gallon in that? Why, that old wreck has a monster V8; besides, it’s fifty years old and needs an overhaul. a) true beyond a reasonable doubt b) probably true c) Possibly true or possibly false The answer is (C) possibl...

In three of the last four presidential races, the winner of the Iowa Republican primary has not captured the Republican nomination. Therefore, the winner of the next Iowa Republican primary will not capture the Republican nomination. a) true beyond a reas...

Answers

The following answers were posted by visitors named Matt.

Thanks a million

that gives me a rather large answer, i believe its thickness would be less than an inch

Oh, so he thought it was heretic to the Church

Thank you very much

Thank you. I was missing the units the whole time. S = H/T Convert kj to Joules; convert C to K.

Junior debt is debt that has been more recently issued, and in bankruptcy it is paid off after senior debt because the senior debt was issued first

i cant find a Ka chart that includes all those, and also, i wasn't even any numbers whatsoever to work with!

I'm sorry, I forgot it is thanksgiving in the States.

I have learned factoring but I do not know what to do for this problem

I got 3p(-p^2+22) Now what

I did simplify P' to be P'=-2p+33(p-9+100)+1(-p^2+33p+9) now I have to set the derivative,P', equal to zero and I do not know how to solve it.

It means that it is attached to that many other vertexes, say if a vertex is attached to two other vertex by lines then it has degree 2

A 1.00 L flask containing 450 torr of H2 is connected to and mixed with a second flask with a volume of 0.500 L containing 250 torr N2. What is the final pressure of the resulting mixed gas system? a) 250 torr b)383 torr c) 450 torr d) 575 torr e) it cann...

in the third step, how did you integrate the right side with no delta-variable?

Barium's Oxidation State is +2, Nitrate's Oxidation state is -1 Does that help?

Thank you, you're a life saver!!

then it has to be reading glasses.

would 1. be CH3C(CH3) Double bond C(CH3)CH3

or CH2 double bond C(CH3)CH(CH3)CH3

Yeah, I know that, but why can Copper lose either one or two while cadmium only has a +2 OS. I think the answer has something to do with valence electrons, but I'm not sure exactly.

how did you get ry and r^2y for y' and y''?

i had to convert 38.3 to kelvin... because i converted the initial T to kelvin.

thank you so much for your help, i know it wasn't that difficult, i think i just confused myself with the temperatures. i get the answer now.

how is liquid or the inital mass relevant to the question, if we're only concerned with the gas?

thanks, this is how i calculated it: 1 mol Fe/.141 mol/cm^3 = <b>7.10 cm^3</b> (the .141 came from converting the density in to moles) is that correct? <b>then the next step in the problem is to find the volume of 1 mol of Fe atoms assuming each atom to b...

you cant do that, Miley, the m's and n's are separated by an addition sign, so you cant use the quotient of powers rule

well 1 W = J/s So, 19 kW is 19000 J/s. But you want to find time, so you want to have seconds in the denominator, you you would multiply the inverse of the watts times the amount of work. so (1 sec/19000 J) * (6.8 X 10^7 J) Joules should cancel out with j...

thanks, I also found that number 1 wish wire gauze. Now I just need number 2

alright sorry, I posted that before I saw your second answer but number 2 is crucible so I am all set.

Since it takes 25 minutes at 37.5 MPH, we know that in 60 minutes, they would go 37.5 miles. We need to know how long to commute is. 25/60 = 5/12, so you multiply 37.5 by 5/12. The answer is 15.625, this is how long the commute is. 15 MPH is 4 minutes per...

n 1976 a powerful earthquake hit the city of Tangshan, China. Scientists had failed to predict the earthquake. If people had paid attention to the unusual animal behavior that preceded the earthquake, however, they would have known it was coming. Animals...

thanks for the correction

You're a star!!

How do I explain the answer please?

#1, Fe(s) is on the left, so it's anode; Pt(s) is on the right, it's a cathode...so the rxn should be D. #2: B because Fe is gaining electrons, making it a reduction=cathode.

no, there's Fe in D for the first question..Fe(s)+8H+(aq)+MnO4–(aq)+Pt2+(aq)==> Mn2+(aq)+4H2O(l)+Fe2+(aq)+Pt(s)

Pt is functioning as a cathode - D shows that Pt is cathode and Fe as anode. I don't understand why H+ and water are in the reaction so my answers 1)D 2)B

I understand that, but how can it say that one gene is operating against a whole bunch of genes?

Thank you that really helps.

Thank you that's really great.

I am sorry a. Positive b. negative c. Inverse. d. spurious

Which of the following is(are) true of culture a. culture would be significant whether people held it in common or not b. despite the cultural diversity that exists in American society, there are symbols, language patterns, belief systems, and ways of thi...

No its not opposite its true so it should be positive then

Well its an error conclusion so its false that mean its spurious.. Thanks

What I'm not sure of are responsibilities that are out of scope of practice. I've googled it but can't find any info on that.what responsibilities do nurses have that may be out of their traditional scope of practice? Pls help.

Well, assuming there is no bottom to the box (taken from where the instructions say you only cut 4 pieces of paper), the largest length possible that can be cut along the 8.5 in side is 4.25 inches. So, assuming the constraints from the instructions the w...

need my test results from May 06. where to look?

He founded the NAACP

premodern style was dramatic where modern sticks more to facts, and morals presented itself more in premodern reporting where in modern the more serious side came out.

Chesterfield 3-1 Mansfield. COME ON U SPIREITES!!

I think its 2-x^1, but I can't be sure as I learned it in precalculus.

Well it's inevitable that we will feel moments of sadness throughout our lives. However, those thoughts can in a sense fly through one ear and then out the other. However, those thoughts nesting in our hair can represent those thoughts staying permanetly,...

Thank you What would be the answer C?

x+5>1 You subtract 1 from both sides

Ok thank you for your help. Can you help me solve this equation? 9y2 + 16=0

No I probbally wouldnt. at most your probably have 25-30 students in your classrooms. SO the most is about 60 shows, 2 on each foot.. So maybe 100 would be a more reasonable number. Hope this helps.

Hey I will most likely by able to help you with this but first 64-7 is not 63

Cna you help me set it up please?

Well 57/7 is??? 8.1 If you round it. IM just doing the math as far as what you wer doing up there

CAn you solve for y?

He has somewhere between 180 and 198. Here's why. He has 3 albums. You know one album has 54. You know the other album as 72. 54+72 = 126 Now, we also know he has one more albume. The album has anywhere between 54 cards and 72 cards in it. 126 + 54 = 180...

Are these possible solutions? (2,1) (3,5) and (4,9)? Thanks for the help!

Thanks but someone else told me that the equation is suppose to be transferred to function form which is y = 4x - 7, and the possible x and y pairs would be (-1, -11) (0,-7) (1,-3. Which method is correct, or does the line have infinate solutions? Thanks!

Thanks! I thought I was correct to begin with! Are you a math teacher?

Nice! So you do this for fun? Or do these people pay you?

My homework is annoying every night. Well good luck to you! Thanks for the help!

total amount of rope:30x5=150 150 ÷3=50 50 YARDS OF ROPE is the answer

thanks yes, that was what I was leaning towards but because nothing in a sounded wrong, I got confused

So would the answer be: Benvolio?

a. Pguage=pgh=1.025E3(9.8)(35)=351575n/m2 b. Pabsolute=Po+Pguage=452575 c. gives you density and volume so convert to kg as the mass. T=mg=1587.6 N d. Increase F=ma, so when it is accelerating there is a greater force pushing down on it

Or was it the allusion that influenced the readers?

y = (x - 4)^2-2

Sorry, my mistake. It is arccos, not arcsin. Also, the negative in the book is exactly in the middle. The book just says evaluate the expression.

But how do I know where cosine (or tangent and sine) are positive? I don't understand. Thanks for the help, btw.

It all makes sense now!!!! Thanks, haha.

Helped the Cook - 9 Letters, begins with C and ends in YS. Lumberjack Beds - 6 letters, 3rd letter is L and 5th letter is K, Maybe?

Figured out who Helped the Cook = Choreboys, Now all I need is Lumberjack beds. Help?

Lumberjack Beds now starts with a B. 6 letters long. 3rd letter is L and 5th letter is K. Last letter is probably S. Help?

Cool. Thanks for the help!

thanks. Oh and I'm having to a hard time figuring out what the Tehran Spring. I don't know if its the entire reform movement, or just the series of protests that occurred over the 2009 presidential election

Great! I finally get it! Thank you...

>_> I have that question too and I've never heard of Ms. Foster

The one about Pascal's Law just gives sites about what it is, and its applications, not what Pascal himself did to discover it, which is what I need.

Thank You SO Much! :)

Just take the $5,000 and multiply it by the remaining months. April-December is 9 months so subtract that from 24 to get 15. (5,000*15/24) which should equal 3,125.

Thank you for the help DrBob

THANKS! but how would I do the second part? "Modify the program so it calculates and displays the amount of money Packaage A customers would save if they purchased Packages B or C, and the amount of money Package B customers would save if they purchased P...

what are the complete dimensions?