Marissa

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

Questions

The following questions were asked by visitors named Marissa.

why is a burn from steam potentially more serios than a burn from very hot water? Water at boiling temperature has a specific heat of 1 calorie per gram. Steam, however, at the same temperature, has a heat of vaporization of 540 calories/gram. Thefore, st...

State the possible number of imaginary zeros of g(x)= x^4+3x^3+7x^2-6x-13 this is how far Ive gotten:there are 4 zeros,3 positive and 1 negative If you've found four real zeroes, then there are no imaginary zeroes. You can also see that there are no imagi...

This will be a multiple post thing so please bear with me. If my answers are wrong then please explain I'll post my work as needed thanks. 1)Identify the y-intercept and the axis of symemetry for the graph of f(x)=-3x^2+6x+12. answer=12:x=1 2)Determine wh...

1)Solve by factoring:5x^2=4-19x answer=-4,1/5 2)Which quadratic equation has roots 7 and -2/3? answer=A A.2x^2-11x-21=0 B.3x^2-19x-14=0 C.3x^2+23x+14=0 D.2x^2+11x-21=0 3)To solve 4x^2-28x+49=25 by using the square root property,you would first rewrite the...

4)Write the equation x^2-2x+y^2+4y=11 in standard form. answer= (x-1)^2+(y+2)^2=16 5)Write the equation 4x^2+24x-y+34=0 in standard form answer= y= 4(x-3)^2+2

1)Use Pascal's triangle to expand (w-x)^5 2)Use the binomial theorem to find the third term in the expression of (n-2p)^6 3)Which is NOT a counterexample to the formula 1^2+3^2+5^2+...+(2n-1)^2=n(2n+1)/3 A.n=3 B.n=2 C.n=1 D.n=4 is it C thanks:)

can you look at my posts when you come to this page please.

does anyone know anything about sigma notation?

1)Find the 20th term of the arithmetic sequence in which a1=3 and d=7 a.143 b.136 c.140 d.133 an=a1+(n-1)d a20=3+(20-1)7 a20=3+(19)7 a20=3+133 answer=b 2)Write an equation for the nth term of the arithmetic sequence -3,3,9,15... a.an=n+6 b.an=6n+9 c.an=6n...

HOW DO I FIGURE OUT -X2-5X-9=0

Objective of Exercise: Conduct research online regarding the strongest of your multiple intelligences. Find three Web sites which accurately describe that intelligence. If you identified more than one dominant intelligence, choose only one for your resear...

Write the equation for the reaction of each of the following with water. a) HCl b) CH3COOH c) NaOH d) NH3 Are these correct? a. HCl (aq) + H2O (l) --> H3O+ (aq) + Cl- (aq) b. CH3COOH (aq) + H2O (l) --> CH3COO- (aq) + H3O+ (aq) c. NaOH (aq) + H2O (l) --> N...

(a) Find pH and pOH of 1.0 M solution of sodium benzoate, NaC6H5COO. (Ka of benzoic acid is 6.2x10^-5) (b) Calculate pH after 0.205 moles per liter of HCl was added (assume volume does not change (c) Calculate pH after 1.0 moles per liter of HCl was added...

Let g(x) = sin (cos x^3) Find g ' (x): The choices are a) -3x^2sinx^3cos(cos x^3) b) -3x^2sinx^3sin(cos x^3) c) -3x^2cosx^3sin(cos x^3) d) 3x^2sin^2(cos x^3) I'm not exactly sure where I should start. Should I begin with d/dx of sin? Or do the inside deri...

How can you make a tri cornered hat out of newspaper. Like the hat paul revere wore, except made out of newspaper. Please help! Its for an AH project!

How many real roots does f(x) = x^3+5x+1 have? x^3 = odd polynomial = at least 1 real root Can I follow Descartes' rule for this? No sign change, so there aren't any positive zeros. when I sub in -x for x (-x)^3+ 5(-x) + 1 = -x^3-5x+1 Then there is one si...

What is the derivative of: a) cos(3x) b) π/x I did (a) just by following chain rule: -sin(3x)*3 so it's -3sin(3x) Is that correct? I'm not completely sure how to do (b). Would it just be like the derivative of 1/x? That's -1/(x^2), would it be -π/(x^2) ?

What is the indefinite integral of ∫ [sin (π/x)]/ x^2] dx ? This is what I did: Let u = π/x (to get the derivative and du:) π*1/x π(-1/x^2)dx = du π(1/x^2)dx = (-1)du so, 1/x^2 = -1/πdu then ∫ [sin (π/x)]/ x^2] dx = ∫ sin(u) (-1/π)du = -1/π ∫ sin u du = -...

Can somebody please check these over for me? I really want to know what I did wrong if I made mistakes! Differentiate the following: 1. y = ln [(4-x)/(4+x)] Since it's the ln of the entire thing, then I can apply ln a - ln b so, dy/dx = y' = 1/(4-x) *(-1)...

1. y = x^x 2. y = (sin^2xtan^4x)/(x^2+1)^2 3. y = x^(1/x) 4. y = 2^(-x^3) Okay, so I'm pretty sure 1 is done easily: ln y = ln (x^x) ln y = x ln x d/dx ln y = d/dx x ln x y'(1/y) = x(1/x) + ln x(1) = 1 + ln x y'(1/y) = ln x + 1 y' y(1/y) = (ln x + 1)y y'...

How can I solve the integral of x^3√(9-x^2) dx using trigonometric substitution? ? ∫ x^3√(9-x^2) dx So then I know that x = 3sinθ dx = 3cosθdθ When I substitute, it becomes ∫ (3sinθ)^3 * √(9-(3sinθ)^2) * 3cosθdθ = ∫ (27sin^3θ * (3 - 3sinθ)* 3cosθdθ Is the...

How would you expect the following series of compounds to compare in behavior for SN1 vs SN2? CH3CH=CHCH2Br CH3CH2CH2Br CH3C(-Br)=CHCH3 on the last one, Br is a substituent of the C and that C is double bonded to CHCH3 Please help! Even if someone could j...

the equation is 4(2x) to the power of negative 2 times (x to the power of 2 y) im confused can someone explain how to do it?

I want to say "I got an A on my history test." So I am going to say "J'ai eu "A" a mon interro histoire." This is the literal way to say it, but is this correct? Merci!

Have to do an enlargement project and enlarge an everyday item by 10 times it original size. Part of grade is level of difficulty so do not want to do something simple. Older sister did a lego piece. Need some good ideas on a item and am stumped!

So I'm having some trouble with this problem.. Is there an equation or is it just a ratio? I'm having so many problems with this one! THANKS! What is the minimum thickness of coating which should be placed on a lens in order to minimize reflection of 531...

OK, so I'm having some serious problems with this one question. It's on relativity. Here it is: Calculate the mass of a proton (m0 = 1.67E-27 kg) whose kinetic energy is one sixth its total energy. How fast is it traveling? THANKS!!

Here's the question I'm currently working on... What initial kinetic energy must an α particle have if it is to approach a stationary lead nucleus to within a distance of 35.9 fm? So I looked up a couple of things I thought we need for this problem. I hav...

A bothersome feature of many physical measurements is the presence of a background signal (commonly called "noise"). It is necessary, therefore, to subtract off this background level from the data to obtain a valid measurement. Suppose the measured backgr...

Microwaves with λ = 1 mm are incident upon a 10 cm slit. At a distance of 1 m from the slit, what is the width of the slit's image? The answer is supposed to be 10 cm. I can't seem to get that though. Can someone explain?

Do you know at what level PCE concentrations are of concern? Is 8,300 PPB a major problem?

why do small businesses need a pay plan?

Balance this equations for redox reactions in basic solution. Fe(OH)3(s) + OCl- ¨ FeO42- + Cl-

100g of water at 30.0C is mixed with 150g of water at 85.0C. What is the final temperature of th mixture assuming no heat is gained or lost during the mixing process?

three different liquids are used in a manometer. (a) derive an expression for P1-P2 in terms of ro(a), ro(b), ro(c), h1, and h2 (b) suppose fluid A is methanol, B is water, and C is a manometer fluid with a specific gravity of 1.37; pressure P2=121.0 kPa;...

Based on the balanced equation, C2H4 + 3O2 → 2CO2 + 2H2O calculate the molecules of H2O formed when 135 molecules of O2 are reacted.

Can you help me describe National Debt in 2 paragraphs?

Write the equation of the perpendicular bisector of the line segment AB with endpoints A(1,1) and B(7,5). Write your answer in slope intercept form.

Write the equation of the prpendicular bisector of the line segment AB with endpoints A(1,1) and B(7,5). Write the answer in slope-intercept form.

estimate a 15% tip on a $42.65 check

What steps do we use to change 1-1/2 cups in half?

while on the moon, the Apollo astronauts enjoyed the effect of a gravity much smaller than that on earth. if Neil Armstrong jumped up on the moon with an initial speed of 1.51 m/s to a height of 0.700m, what amount of gravitational acceleration did he exp...

A 500kg pig is standing at the top of a muddy hill on a rainy day. the hill is 100.0m long with a vertical drop of 30.0m. the pig slips and begins to slidedown the hill. What is the pig's speed at the bottom of the hill? Use the Law of conservation of Ene...

9 + 5k = 45 + 2K the sample shows operation S9 to come up with 5K=36+2k assuming subtract 9 from the 45 sample shows K=12 how did they come up with that?

if the discriminant of (5u^2)+bu+2=0 is 41, what are all the values of b

Let f be a function such that f(-1)=3 and f'(-1)=6 let h(x)=x^5f(x) evaluate h'(x) at x=-1

I'm in 6th grade and I need help for my science project. I don't even know what to do. Any fun science projects for 6th graders?

The lim as x goes to 0- for cos(x)/sin(x). I know the answer is negative infinity but I don't really understand why.

What is the standard notation for 3 to the 3rd power

We're learning direct object pronouns so I had to replace the "sellos" in the first sentence-did I do it correctly? Tú coleccionas sellos. Tú los coleccionas.

I have to read this and answer these questions for homeowrk-I'm not sure if I did this correctly. Could you please check-I put the reading and then questions and my answers under it-thank uyou for checking-I'm really not sure about my answers-I'm a little...

This is in regard to my earlier post about the conversation- Thank you for all your help.Thank you for your patience too Could you recheck this? I don't understand about who talks much-my number 10 but I think you put it at #9You said it was the brother n...

Review the nutrition quality of the items, using what you know about daily values, and ingredients (one of the products must have a health claim). Write a 300-500 word essay on what you have learned.

Issac has to do 1000J of work on a 5kg box, and all the work he did simply went into lifting it above the ground. How high above the ground will the box be when all the work has been done?

A small cart weighs 15.0 N. If a constant force of 25 N is used to move the cart horizontally across the desk, A] What will be the acceleration of the cart? B]How far will the car move in 1.0 second

A dominant gene A produces wire-haired texture in dogs. Its recessive aamllele a produced smooth hair. Cross the heterozygous wire-haired dog with homozygous smooth-haired dog. List the genotype and phenotype ratios of all the possible offspring.

Were cassette tapes famous when they first came out?

Delia works from 8:00 a.m. to 4:30 p.m. and has one hour each day for lunch. How much does she earn for a five-day workweek at $4.80 per hour?

Find the derivative of y=ln((1+e^x)/(1-e^x)) I know that the derivative of y=ln(1+e^x) would be (e^x)/(1+e^x), but I'm not sure what to do with the 1-e^x on the bottom here. Can someone help please? Thanks!

How do you use imlicit differentiation to differentiate e^(xy)? I have the problem "use implicit differentiation to find dy/dx. e^(xy)+ x^2 - y^2 = 10. I've gotten to the point whereI have d/dx(e^(xy)) + 2x - 2ydy/dx = 0, but I can't go any further becaus...

What happens to approximately 60% of the energy released during the complete oxidation of glucose? A) It is used to synthesize more ATP. B) It is reused to supply the energy for anabolic reactions. C) It is stored in the body as fat. D) It is lost by the...

A dog running in the +y-direction at 6.0 hears its owner call from behind, and 2.7 later it's running at the same speed in the opposite direction. Calculate the dog's change in velocity. Calculate the average acceleration

Assuming that f and g are functions differentiable at a (though we do not know their formulas). Prove that f +g is differentiable at a using the definition of the derivative.

Gonorrhea is spread through contact with the ________. A. Anus, Penis, Mouth, Skin B. Penis, Anus, Mouth, Vagina C. Vagina, Skin, Penis, Anus D. Mouth, Penis, Vagina, Fingers I think it's B?

At the moment car A is starting from rest and accelerating at 5.0 m/s2, car B passes it moving at a constant speed of 45m/s. How long will it take car A to catch up with car B?

0.350L of 0.160 M NH3 is added 0.140 L of 0.100 M MgCl2 . How many grams of (NH4)2SO4 should be present to prevent precipitation of Mg(OH)2 (aq) ? The Ksp of Mg(OH)2 is 1.8 x 10–11.

A bicycle trail is 7miles and 880 yards long.How many total yards is the bicycle trail

At what age is it typical for a child to begin testing the word no

I'm struggling some with the us of trigonomic properties. The problem is integral sin(2x)sec(x) dx and I don't understand how sin(2x)sec(x) simplifies into 2sin(x).

Find 2 consecutive integers, the smaller a perfect cube and larger a perfect square.

Your space ship has docked at a space station above Mars. The temperature inside the space station is 24oC at a pressure of 745mmHg. A balloon with a volume of 425mL drifts into the airlock where the temperature is -95oC and the pressure is 0.115 atm. Wha...

A support wire runs from the top of a tower to the ground. If the tower is 1200 feet tall and the wire is attached to the ground 500 feet away from the tower, how long is the support wire?

If f(x)=2x+1 and g(x)=3x-5, find f(g(2)).

What events in hitler's childhood lead him to become a dictator? Please help and thank you so much.

A man at point A directs his rowboat due north toward point B, straight across a river of width 100 m. The river current is due east. The man starts across, rowing steadily at 2.50 m/s and reaches the other side of the river at point C, 150 m downstream f...

When Christy made tortillas for the first time, she used all the dough to make 10 tortillas. After making quesadillas, she decided that the tortillas were not large enough. The next time, using the same amount of dough, she made each tortilla the same thi...

I have 8 marbles: 3 blue, 1 green, 4v reds. What is the probability of selecting a blue marble twice with replacement and twice without replacement

Has the effort of Westerners to aid the rest of the world done more good than harm? Its a opinon but i would like a answer please. Please make your answer at least 6 sentences. Thank you very much

What were the negative impact or effects of the Incas and Aztecs? Thank You

During the week ended May 15, 2013, Scott Fairchild worked 40 hours. His regular hourly rate is $31. Assume that his earnings are subject to social security tax at a rate of 6.20 percent and Medicare tax at a rate of 1.45 percent. He also has deductions o...

What did the founding fathers of the United States create in order to ensure that one person did not ever have too much power in the government?

What number is 1,000,000 greater than 337,676

An equilibrium is dynamic. true or false

A baseball player slides into third base with an initial speed of 3.8m/s. If the coefficient of kinetic friction between the player and the ground is 0.40, how far does the player slide before coming to rest?

I am having difficulties trying to do rational expressions. I have to use the words Domain, Excluded Value, Set, Factor, and Real Numbers to show how I got the answer. Can someone please help me solve this one? g^2-6g-55 ___________ g

Find the electric field at a point midway between 2 charges of +40.0e-9 C and +60.0E-9 C separated by a distance of 30.0 cm. My work: q1=40E-9 q2=60e-9

16.5 mL of 2.5 M sodium sulfate is mixed with 35.5 mL of 4.5 M sodium nitrate. What is the concentration of all ions in the new solution?

24.0 mL of a 2.4 M silver nitrate is mixed with 32.0 mL of 2.0 M sodium. Calculate the mass of precipitae formed. Calculate the concentration of all ions remaining in solution after the precipitate forms. I don't know how to start this or where to go with...

At 20 degrees celcius the vapor pressure of toluene is 22 mmhg and that of benzene is 75 mmhg. Assume an ideal solution, equimolar in benzene and toluene. At 20 degrees celcius what is the mole fraction of benzene in the vapor in equilibrium with this sol...

Does a k constant have a unit?

What would the unit be if you calculate the rate when A= 0.30 M and b= 0.30 M. I have the calculation done right and its 1.57 x 10 to the -3 but I don't know the unit

Can someone help with this one? Half life of 55Cr is about 2 hours. A sample of the isotopes delivered from the reactor to lab requires 12 hours. What is the minimum amount of material that should be shipped to get 1.0 mg of 55Cr. I said 32mg but I got it...

What is the order of rate = k[NO]2[Br2]. 2nd order?

How would the addition of hydrogen gas at constant temperature and volume effect rate=k[h2][I2]?

Would someone be willing to proof read my English essay? I proof read it but I don't know if I got all the mistakes.

A recipe calls for 2/3 cups chocolate but I'm only making a fourth of the batch how much chocolate what I need

Given: BA is congruent to DC; BE is perpendicular to AC; DF is perpendicular to AC. Prove: BE is congruent to DF. The image is of rhombus ABCD. There is a segment connecting A and C with points E and F each about a third of the way into the segment.

A spring scaled is used to measure the weight of a object on the earth. The scale on the moon would read what?

Calculate molarity of KNO3 solution if 69 g of salt are dissolved into 250 mL of solution

Which one of the compond are covalent HF RbF LiF NaF

Answers

The following answers were posted by visitors named Marissa.

do you know about sigma notation?

I know what it is I'm just asking so someone could help me with my questions.

5/9 degree fahrenheit

NaC6H5COO- (aq) + HCl (aq) <---> NaCl (aq) + C6H5COOH (aq) should say NaC6H5COO (aq) + HCl (aq) <---> NaCl (aq) + C6H5COOH (aq) and 0.8 NaC6H5COO, not 0.8 NaC6H5COO-

One of the other values I have to plug in for HCl is 0.803 mols/L So then at equilibrium, NaC6H5COO is 0.197, NaCl is 0.803, C6H5COOH is 0.803 If I plug it into Henderson Hasselbach equation: pH = pKa + log [0.197]/[0.803] the log of 0.197/0.803 is negati...

that's what i thought, too. but it's not. 2n(material)t= m*(wavelength/2) going from a medium with higher n to lower n, you divide the wavelength by 2. thanks for the help, though. i eventually figured it out!

wait, aren't we lookng for the mass, too?

so, q is the elementary charge times 2, and Q is the charge of lead? what is that? and thanks, the concepts are much clearer.

It's an experiment. In Part 2.2.4 of the experiment, some light that reflects off the apparatus or from neighboring stations strikes the photometer even when the direct beam is blocked. In addition, due to electronic drifts, the photometer does not genera...

line RS=line UT and line RT= line US prove triangle RST= triangle UTS

compensation plans, this book calls it pay plan.

I was told that when dividing a mixed number you write the reciprocal of the second number and then multiply and that will change the answer.

Isn't this a division problem? I have to divide 1-1/2 into two parts.

Thank you very much for your help. I had the same answer. I'm trying to explain the reciprocal to my daughter, she is worried that her teacher will say the answer is wrong.

By forming carp pools(no spaces).

Thank you for all your help.Thank you for your patience too Could you recheck this? I don't understand about who talks much-my number 10 but I think you put it at #9You said it was the brother not the person but I'm confused why it states me and then habl...

32363.376 kJ/mol

convert grams into kilo grams: 95/1000 = .095 kg x = sqrt MV^2/k x = sqrt .095(3.4)^2/70 x = .12525 x = .13 m x = 13 cm

Just pick 3 mid sized cars.

Okay, thanks guys!

largloi is gorilla osmoe is mouse swarlu walrus clame is camel

I believe the correct answer is C. increase;reduce?

I believe that the correct answer is B. Physical activity.

I put D down and got it wrong.

The answer is y=2x+7. First put it in point slope form then solve it into slope-intercept form. Use the same slope because having parallel lines means the same slope.

I think it good.

I am not sure but I think it is 50,400 dollars a week. 60 minutes in one hour 24 hours in one day 7 days in week (5x60)=300 300x24= 7200 7200x7=50,400

x+2x+3x=180 add them. 6x=180 divide 180/6= 30

dark haired/skinned

No it would contain4. It would contain 4 chromosomes. 2n means its a diploid cell which contains 8 chromosomes. Gamates are haploid cells therefore contain of a diploid. i do it like this though 2n=8 2Divided into 8=4..

The forth one is correct and that is it. The other examples are extremely grammatically incorrect.

@DrBob222 so, for the first part I do, Ksp = (Mg^2+)(OH^-)^2 , which is 1.8x 10^-11 = (.0286)(OH)^2 for OH-, i get 2.51 x 10^-5 then, for the second part, I do, Kb = (NH4^+)(OH^-)/(NH3), which is 1.8x 10^-11 = (NH4)(2.51 x10^-5)/(.114) for NH4, i got 8.17...

The solubility of AgCl(s) in water at 25 C is 1.33x10^-5 M and its deltaH of solution is 65.7 kJ/mol . What is its solubility at 60.1 C ? Please explain how to solve for this!!

Thank you Ms.Sue!!!!

Thank you very much!!!

Thank you PsyDAG this will be very helpful.

the odds are against 2/7. Meaning 2 out of 7 chances you are going to have s. And 5 out of 7 you will not get S.

On the world or in general. I'm trying to argue the mayan civilization was the best and i need to know what negative effects did the Incas and Aztecs do.

Help me please.

The GCf of my numerator and denominator is 3. I am equivalent to 2/5

Here's the work: a) .575 g Li3N(1 mol Li3N/34.83 g Li3N)(6 mol Li/2 mol Li3N)(6.941 g L/1 mol Li) = 0.334 g Li Plug in the molar ratios and masses of N2 for part B.

Pressed enter too soon. My work continued: r=.30 m Forceelectric = 8.99e9 * ((40e-9*60e-9)/(.3*.3) = 2.397

Do you know of any sites that will proof read it I have read it a couple of times but I want to make sure I get it right

D) Secretes hormones that regulate how much we eat.

So would she have 26 slices?

That was part A this is part B the actual question is different

Sorry were working in a group and not everyone has the same questions and so we know who's question is which sorry for the confusion !

So divide both sides by t and end up with v=-32? That doesn't seem right.

Never mind. I forgot about multiplying it by 4 because it's supposed to be the velocity for 4 seconds.

Confidence interval for one proportion

Thanks guys you failed me

It’s 7 and up

No; Tim can read 140 words in 5 minutes.

The answer is 4, I am verifying!!!

Siri, who is not yet 22 year old

It is Online Publication

who loves listening to drama but hates being in it

are you sure it is right

can someone put this in dum person form

the 32 is supposed to be exponents.

Answer-- 7÷623= 89

The answer is B, entirely GPE