# Posts by Mark

Total # Posts: 1,717

**Math**

When graphing two linear equations, what is the significance of the intersection of the two graphs, and if there is no intersection?

**Chemistry**

So then because the valences are diff on each side that means its a redox reaction?? And so N gained eletrons does that mean it's the NO3 ^-1 that is the oxidizing agent or the N in NH3?? this stuff is tripping me up.....can ou explain it any more for me? sorry...im a ...

**Chemistry**

I'm having a hard time with Redox and how to figure out which is redox Select all of the reactions that are redox reactions. I) Ca + 2H2O Ca(OH)2 + H2 II) CaO + H2O Ca(OH)2 III) Ca(OH)2 + H3PO4 Ca3(PO4)2 + H2O IV) Cl2 + 2 KBr Br2 + 2 ...

**Chemistry**

I think these I know how to do ....just want someone to check..still sorta mixed up on the first question. Thanx For the following reaction, what is the correctly balanced reduction half-reaction? Fe(OH)3(s) + Cu(s) → Fe(s) + Cu+(aq) + OH-(aq) A. e- + Fe(OH)3(s) → ...

**Chemistry**

I'm having a hard time with Redox and how to figure out which is redox Select all of the reactions that are redox reactions. I) Ca + 2H2O Ca(OH)2 + H2 II) CaO + H2O Ca(OH)2 III) Ca(OH)2 + H3PO4 Ca3(PO4)2 + H2O IV) Cl2 + 2 KBr Br2 + 2 KCl...

**Calculus**

z=2 square root of 2

**English**

He hurt his fist trying to open the window.

**Math**

Find the coordinates of the turning point and determine wether it is minimum or maximum. y=xlnx-2x The answer in the book says the co-ordinates are (e,-e), the closest I have come is (1/lnx,-1/lnx) which works if 1/lnx=e, but I don't think that it does. This question is in...

**Chemistry**

How do I know which of these .1M solutions will have a pH less than 7? KF, NH4I, NaH2PO4, Fe(NO3)3 I am guessing all but KF is acidic...but if someone could confirm this and explain why that would be helpful

**P. Chemistry**

If given the Ka or Kb and pKa and pKb, how do you find the initial concentration of a weak acid/base in a solution given the pH? Is there an equation for this? I can't find anything in my notes and am not sure what to look for.

**P. Chemistry**

A student added solid K2O to a 750.0 mL volumetric flask. The solid was dissolved in water and then the flask filled with water to the mark. This formed 750.0 mL of the initial KOH solution. 20.0 mL of the initial solution was transferred to another flask and diluted to 200.0 ...

**Accounting**

2. b

**physisc! URGEENT**

The current is 1.9 m/s. A person can swim 0.7 m/s. What is the best angle for the swimmer so that it is swept downstream the shortest distance possible?

**Mega Stat**

How do you know the p-value on megastat. On minitab It looks like it gets a different p-value than megastat. I got a number from megastat of 2.35E10 and on minitab it was 0.000.

**statistics**

How do you know the p-value on megastat. On minitab It looks like it gets a different p-value than megastat. I got a number from megastat of 2.35E10 and on minitab it was 0.000.

**science**

describe a pond and indicate the types of interdependence of living things in it

**science**

describe a pond and indicate the types of interdependence of living things in it

**Chem**

When 0.10 g of insulin is dissolved in 0.200 L of water, the osmotic pressure is 2.30 Torr at 20°C. What is the molar mass of insulin? I tried using the van't hoff equation, converting Torr into atm; but not sure how to do it. my teacher didn't really explain this ...

**statistics**

Number sampled is 1,000 and mean is 7.2 on a scale from 1-10 how do I determine standard deviation. Can we answer this with using the sampling distribution of the sample proportion?

**statistics**

If sample number is 1,000 and mean is 7.2 on a scale from 1-10 how do I determine standard deviation.

**MA 005**

The width of a rectangle is 3ft. less than the length. The perimeter is 62ft. Find the length and the width od the rectangle.

**criminal justice**

During the middle Ages, defendants could avoid serving a harsh penalty if they were granted

**business**

Explain the difference between fiscal policy and monetary policy. Discuss how each of these approaches can be used to influence the state of the economy.

**algebra**

Joe's larger tank is completely filled with water. He takes water from it to completely fill the small tank. Determine how many cubic inches of water will remain in the larger tank The larger tank is 12 x 30 x 16 and the smaller tank is 6 x 12 x 9.

**Math**

The average of a set of five different positive integers is 360. The two smallest integers in the set are 99 and 102. What is the largest possible integer in this set?

**math**

(5)(3/5)(x+2)=(5)(x-4) 3(x+2)=(5)(x-4) 3x+6=5x-20 3x+6+20=5x-20+20 3x+26=5x 3x-3x+26=5x-3x 26=2x x=13

**Physics**

A rocket is launched straight up with constant acceleration. Four seconds after liftoff, a bolt falls off the side of the rocket. The bolt hits the ground 7.10 seconds later.

**Physics**

A rocket is launched straight up with constant acceleration. Four seconds after liftoff, a bolt falls off the side of the rocket. The bolt hits the ground 7.10 later. What was the rocket's acceleration?

**math**

find all possible values of x such that, when the five numbers x, 14, 11, 6, 17 are arranged in order, the mean is equal to the median

**math**

find all possible values of x such that, when the five numbers x, 14, 11, 6, 17 are arranged in order, the mean is equal to the median

**maths**

24

**fallacy**

It takes someone with a really big heart to give to our charity , and you seem like someone who cares more than most . ...

**business**

Thank you Ms.Sue, for the resource.

**business**

I need help with this question whats the social and cultural customs that Walt Disney could encounter overseas?

**business and tech**

What are some advantage of globalization?

**MATH**

What percent of 49 is 7

**MATH**

25 is what percent of 365? What percent of 128 is 24

**Math**

What percent of 185 is 35?

**algebra**

solve each system using elimination x+4y=12 and 2x-3y=6

**Math**

Could someone Please tell me how to go about doing these two problems. Thank You.

**Math**

Multiple Choice: Mary Jane gets a student rate of $27.50 a month for health insurance. There is a $200.00 deductible, but no coinsurance payment. She recently received treatment for a covered condition. The bill was $2,350.00 Mary's insurance company provided payment of 80...

**chemistry**

F is not he right answer

**business and tech**

lets say that price gauging didn't happen,and the merchants sell the goods at the market price but with laws of supply and demand how would that be a good thing, When disasters hit an area, the cost of everything seems to go up immediately?

**business and tech**

lets say that price gauging didn't happen,and the merchants sell the goods at the market price but with laws of supply and demand how would that be a good thing?

**business and tech**

I need help on this question. "When disasters hit an area, the cost of everything seems to go up immediately: food, water, housing, gas and so forth. Explain why this phenomenon may be a good thing, using the laws of supply and demand". thank you very much

**Algebra 1**

1.c 2.b 3.b 4.c 5.c

**SCIENCES**

TEN EXAMPLES OF SUSPENSION AND SOLUTION MIXTURES.

**8th grade**

The area of a rectangle is 45cm2. The height is one less than two times the base. what is the length of the base

**Algebra Word Problems**

Children + adult = total receipts $1.00(x) +$3.00(350-x) = $750 solve for x=>>>> number of children tickets, 350- "x" =>>>adult tickets

**calculus**

Given x+xy+2y^2=6 find the coordinates of all other points on this curve with slope equal to -1/3. Please show work.

**english**

To what extent is romeo a weak character

**algebra**

5{[4(n-4)+18]-[3(5n-3)+5]}= simplify the answer

**Calculus**

Two bacteria colonies are cultivated. The first colony has a doubling time of 2 hours and the second a doubling time of 3 hours. initially, the first colony contains 1,000 bacteria and the second colony 3,000 bacteria. At what time t will sizes of the colonies be equal? Is ...

**chemistry.**

When 41.81 of a solution of aqueous sliver ions with a concentration of 0.2040 mol dm3 is added to a solution of XO-3/4 ions, 1.172g of the precipitate is formed? ..Can any one help me with that! NB: -3/4 mean that 3 is up and 4 is under it.

**calc**

a) Suppose f(x) is defined on 0 ≤x≤1 by the following rule: f(x) is the first digit in the decimal expansion for x. For example, f(1/2) = 5 and f(0.719) = 7. Sketch the graph of y = f(x) on the unit interval with appropriate scales for x and for y. Use a graphical ...

**calc**

a) Suppose f(x) is defined on 0 ≤x≤1 by the following rule: f(x) is the first digit in the decimal expansion for x. For example, f(1/2) = 5 and f(0.719) = 7. Sketch the graph of y = f(x) on the unit interval with appropriate scales for x and for y. Use a graphical ...

**Math**

How tall is a cylinder that has a volume o 2,123 cubic meters and a radius of 13 meters?

**Statistics**

h t t p : / / t i n y u r l . c o m / y f z j y u o I'm not sure how to do #2.

**Math**

Everyone in Mrs.Bowman's art class has 8 jars of paint except Jerome, who has 10. There are 74 jars of paint in the room. How many students are there in Mrs. Bowman's art class.

**math**

For fall festival, Mrs. Marco bought 6 bags of Golden Delicious apples. She handed out 43 apples and had 5 left over. How many apples were in each bag.

**Physics-Astronomy**

A high-velocity star HVS 1 is moving at 600 km/s, 0.2% speed of light. Assuming the HVS 1 is moving away from us, and that its velocity is oriented entirely along our line of sight, determine the Doppler shift of the Ha spectral line (6562.8 Angstrom) produced by this star. Is...

**Physics-Astronomy**

Hello, I have no idea how to do the following question. Any help would be appreciated: An energy of at least 13.6 electron-volts is required to ionise a hydrogen atom. What is the longest wavelength of electromagnetic wave capable of ionising hydrogen? And which regions of the...

**Readind and writing number**

I am 55 yr old can get help

**world history**

my book does not talk about that can you help me with some websites that might help me

**world history**

thank you :D and what did both countries offer each other

**world history**

middle ages

**world history**

how did cultural diffusion occur between Europe and Asia?

**physics**

2. A rifle is fired horizontally and travels 980 m. The rifle barrel is 6.1 m from the ground. What speed must the bullet have been travelling at? here i got a time of 201.24.. i then added the 980m to the 6.1m and put it in the x=vt equation to get a velocity of 69.49

**Math**

I need help with this problem. In decimal form, write the ratio of the first 8 consecutive square numbers. 1 squared:2 squared, 2 squared:3squared, 3 squared:4 squared

**chemistry.**

2.02g of KNO3 ( Mz=101) is dissolved in sufficient water to prepare 0,500 dm3 of solution. What is the concentration of this solution in mol dm?

**chemistry.**

So what do we have to do in this case?

**chemistry.**

Which solution contains 0,1 mol of sodium hydroxide? A- 1 cm3 of 0,1 mol dm3 NaOH B 10 cm3 of 0,1 mol dm3 NaOH C 100 cm3################### d 100 cm3 ###################

**Grammar**

I'd appreciate if you would help with the other questions. Thank you.

**Grammar**

what is the adjective and adverb in the following sentences? The plane circled the vacant field and slowly came in for a smooth landing. You should not drive too fast; however, a slow driiver can be dangerous too. Mira has been faithfully practicing the cello lately. Luisa ...

**English**

You have some good ideas however, there are quite a few mistakes. Always build on your topic sentence. Also, be certain to always use your Spell Check. You might want to keep a dictioary handy when writing. Make certain your sentences are a complete thought. Try not to be too ...

**possessive nouns**

______ stories seemed unbelievable A. Survivors B. Survivor's C. Survivors' D. Surviors's

**possessive nouns**

Worry haunted the refugee ____ eyes A.childrens B.children's C. childrens'

**possessive nouns**

Money might be sewn into ____ coat linings. What is the answer A. women's C. Womens'

**5th grade**

Thats what I had but was not for sure. Thanks!

**5th grade**

Eight states border one or more of the five Great Lakes. Write a fraction representing the part of the 50 states that border a Great Lake. Write the fraction in simplest form.

**English A1 Poem**

Can any one help to analysis it.

**English A1 Poem**

All afternoon my brothers and I have worked in the orchard, Digging this hole, laying you into it, carefully packing the soil. Rain blackened the horizon, but cold winds kept it over the Pacific, And the sky above us stayed the dull gray Of an old year coming to an end. In ...

**6th grade**

how do you draw a diagram to find the solution to 2.6 devided by 0.4 ,and explain what the quotant means?

**Calculus**

maximum and minimum of y = cos(x) + sin (x)on the interval [0,2pi]

**Exponential Decay**

the half-life of carbon-11 is 20 minutes. How long will it btake for 600g of carbon-11 to decay to 30g?

**The secret of gumbo grove**

oh...im sorry then but thank you for attempting.

**The secret of gumbo grove**

do you know where i can find chapter summaries for this book.

**Math**

6/15= 2/5 divide 6 and 15 by 3 15/60=1/4 divide 15 and 60 by 15 78=78 (whole number)

**Maths**

im not sure im typing as i find them. A=total of counting the numbers 11,22,33,44,55,66,77,88,99,101,202,303 B) = total counting the numbers 11,22,33,44,55,66,77,88,99,101,202,303,404,505,606,707,808,909

**Maths**

what is a?

**Grammar**

yes you capitalize it

**Family Report**

What should i put in a report about my family?

**guess and check**

there are 42 question on lindas test. sum of the questions are 2 point and sum were 3 points. she got a perfect score. how many 2 question where there and 3 point questions were on lindas test

**algebra1**

the speed of train A is 8mph slower than the speed of train B. Train A travels 220 in the same time it takes train B to travel 260 miles. Find the speed for each train.

**6th grade (vocabulary)**

gather

**summarizing book**

can you summarize the summaries at this link? sparknotes website Search: A wrinkle in time

**3rd grade**

198+864=1062

**Math**

I don't think that is right answer is x=4 not sure how

**Math**

Solve. log(x^3)-log(2)=log(2x^2)

**math grade 12**

Solve. log(x^3)-log(2)=log(2x^2)