# Posts by karen

Total # Posts: 1,088

**chem**

Fe3O4(s) + C(s) > CO2 + Fe Balance the chemical reaction and calculate how many moles of Fe3O4 must be reacted to produce 440 gr CO2 (the > is an arrow)

**chem**

But how do I convert 2.0 x 10 (-13) km to cm?

**chem**

2.0 x 10(exp-13) km/0.01=

**chem**

Consider the unbalanced reaction CO + H2O > CH4 + O2. All reactants in the gas phase. Calculate H per mole of H2O reacted. (The > is an arrow)

**Statistics**

At the end of the Halloween Festival the organizers estimated that a family of participants spent an average $45.00 with a standard deviation of $12.00. What’s the probability that the mean amount spent will be between $20 and $30?

**6th Grade Math**

Caleb sold boxes of candy. Some sold for $2, and some sold for $3. He sold a total of 35 boxes and received $92. How many boxes did he sell for $2?

**Distributed Management System**

what is the crow's foot ERD of this problem?

**Math**

89=(93 + 86+ 92+ 80+ x) / 5 Solve for 89 x 5 = 445 Add other grades 93+86+92+80=351 445-351=x x = 94

**Math**

Ryan's average for 5 arithmetic test was 89. On four of the tests he made 96,86,92, and 80. What did he make on the fifth test?

**Math**

A recipe or trail mix calls for 1/4 cups of raisins, 1 1/2 cups of granola, 1/2 cup of mixed nuts, and 1/8 cup of chocolate chips. What fraction of each ingredient is required to make 5 1/2 recipes

**Physics**

The tortoise and the hare are in a race of 1000m distance. The tortoise travels the entire race at a speed of 2.0 m/s while the rabbit runs the first 200 m @ 2.0 m/s. Then he stops to take nap for 1.3 hrs and awakens to finish the last 800m with an average speed of 3.0 m/s. ...

**geometry**

M is the midpoint of JK. find the coordinates of K. 1. J (-8,4) M (-1,1) 2. J (9,-5) M (5, -2) 3. J (0,11) M (-3,2)

**physics**

A particle accelerates from rest at a uniform rate of 3 m/s^2 for a distance of 200m. -how fast s the particle going at that time? -how long did it take for the particle to reach that velocity?

**Physics**

Nitrogen boils at -196°C. What is the corresponding temperature in the Fahrenheit scale? A) -290°F B) -346°F C) -315°F D) -196°F E) -321°F

**Physics**

On a drive from your home to town, you wish to average 52 mph. The distance from your home to town is 108 miles. However, at 54 miles (half way), you find you have averaged only 39 mph. What average speed must you maintain in the remaining distance in order to have an overall ...

**Physiology**

Yes I do. This is part of my physiology class. Not every professor has the same structure to their lectures

**Physiology**

How many is moles are in 0.5L of a 3.0M solution of sodium chloride? Sodium chloride dissociates into 2 osmoles per mole. I'm having trouble setting this up. My teacher couldn't explain it clear enough and neither does the book.

**probability**

A coin is such that the tail is four times as likely as the head. A game is played such that you earn 4 points for a head and lose 2 points for a tail after every toss. Let X be the total score after 3 consecutive tosses. Find (i) the probability distribution of X (ii) and ...

**AP Algebra**

Thank you Steve! Sorry about the "pi" . . Thanks again!

**2 questions in one post sorry!!**

Accidently put my 2 question as answer to my first question sorry!! Hope someone still answers

**AP Algebra**

A sphere of metal measures 4.6 cm in radius and has a density of 7.9 g/cm^3. What is the mass of a sphere? FYI: use V=4/3*pie sign*r^3 . . How would I set it up in dimensional analysis?

**AP Algebra**

A man's average speed is 4.86 miles per hour. Express this in cm/sec .*dimensional analysis* .. the teacher answer is "217.32 cm/sec" however mine came out to be "217.26" My work: (4.86m/hr)(5280ft/1m)(12in/1ft)(2.54cm/1in)(1hr/3600sec) = 217.26cm/sec ...

**Ap algebra**

Question 1: if a function is undefined at a point can that point be its domain. Explain Question 2: explain what is meant by the minimum value of a function

**Math**

Explain whether a function that has a slope of 0 can have the attribute of symmetry. . My answer is yes, because even though there is no slope you still have a possibility of it being symmetrical to the y axis depending on the domain. Am I correct

**Math**

The food that the average American consumes in a day provides 2.0 X 10^3 kcal of energy. How many calories a sec is this? *how to set up work in dimensional analysis*? & *what is "k" in kcal stand for*?

**Math**

Diamonds are measured in units called a carat. One carat equals 200mg. If a diamond is 0.600 carat, what is the mass of the diamond in ounces? * 1kg=2.205 pounds* *1pound= 16 ounces* . . How do I get to the answer showing work/setting it up?

**math**

A bag of candy contains 24 oz. If you want to give 18 people equal servings how many ounces should you give each person? 18/24 =3/4

**introduction to computers**

You need to install an operating system on a computer that will be sharing files for the company employees. You estimate there will be as many as 15 users accessing these files at one time. Which operating system below is ideally suited for this machine? A

**Spanish 2**

Dear Profesora, Can you check my answers? 11 of 21 Grammar Questions: Choose the best answer to express the given statement or question. Creo que el poema ______________ por Pablo Neruda. escribió fue escrito** fuera escrito escriba unable to answer Question 12 of 21 ...

**Math**

A certain recipe requires 6 2/7 cups of flour and 7 2/9 cups of sugar. A) if 6/5 of the recipe is to be made, how much sugar is needed? Write your answer as a proper or improper fraction: B) if the above ingredients are required for one batch, find the amount of flour needed ...

**Math**

In a full parking lot, there are 35parking spots and 80 wheels. How many cars are there and how many motorcycles are there?

**Chem 105**

2230 torr

**Chem 105**

178.02

**math**

p. 84 no.10 (from Solid Mensuration: Understanding the 3D Space book by Earnhart) Plane A which contains an isoceles right triangle forms a dihedral angle of 60 degrees with another plane B. If the hypotenuse of the triangle lies in plane B and measures 8 inches, find the ...

**calculus1**

Find extrema of f(x)=1-(x to the 2/3) on interval [-1,8]

**calculus1**

f(x)=2secx-tanx, -π/2<x<π/2 find the points at which the tangent is horizontal

**calculus1**

Find the arc length of the graph of the equation y+1/4x+x^3/3=0 from the point(2,67/24) to point(3,102/12) help me with this thanx!

**calculus1**

Find the arc length of the graph of the equation y+1/4x+x^3/3=0 from the point(2,67/24) to point(3,102/12) help me with this thanx!

**calculus1**

Hi, I have 3 problems here need to be solved, help me please 1.Evaluate ∫ sin2x sec^5(2x)dx 2. If f(x)=√x and P is a partition of [1,16] determined by 1,3,5,7,9,16,find a Riemann sum Rp of f by choosing the numbers 1,4,5,9 and 9(yes 9 again) in the subintervals of ...

**calculus1**

Approximate the real root of cosx+x=2 to four decimal place. (Using Newton's method) I need help with this! Thank you

**calculus1**

Great! Except that you wrote "area" instead volume....:P

**calculus1**

Region R is bounded by x=2-2y^2 and x=1-y^2 find the volume of the solid generated if R is revolved about the y-axis Anybody help me with this? thanks!

**calculus1**

Set up the integrals that can be used to find the area of the region by integrating with respect to X and Y (the region is bounded by y=3x,y=x,y=4-x) Anyone help me set up the integrals??

**Social studies**

Ms sue I relly need help its during the republic

**Social studies**

Hello are u still there ???? I really need help por favor(that means please)

**Social studies**

During the republic

**Social studies**

How important was government in the live of the romans? Two predictions ......I NEEED HELP....

**Algebra**

20

**math**

a box is to be made by cutting out the corners of a square piece of cardboard and folding the edges up. if 3-inch squares are to be cut out of the corners and the box contains 243 cubic inches, what is the length of a side of the original cardboard square

**Math Check**

Hi! Can someone check my answers? Thanks! Questions: 1.) What are all of the foci's for this Ellipse? (x-2)^2/3 + (y-2)^2/4=1 A.) (3,2) B.) (2,2) C.) (1,2) D.) (2,3) E. (2,1) My answer: B & E. 2.) What is the eccentricity for this Ellipse? A.) 2 B.) 1/2 C.) 3/4 D. 1 My ...

**Math**

Please show how 7/8 is greater than, less than, or equal to 7/24. Thanks

**math**

Estimate 99 9/19 + 1/5, Use benchmarks to estimate the total

**Business**

5. A long-time expert in your field who will guide and advise you in your start-up phase is called a/an A. mentor. B. investment counselor. C. contact. D. entrepreneur. My answer is b If not b then d But I'm bit sure I need help

**Comprehensive Science**

When an electric current is passed through water during the process of electrolysis, two gases are formed. One gas has a boiling point of -183°C and the other has a boiling point of -253°C. Has a physical change or a chemical change occurred? Explain. My answer: I ...

**ela**

1. what is the ordered pattern of rhymes at the ends of lines of a poem or a verse called?

**Tsi math**

A rectangular room measures 20 by 7 feet Find the cost of installing a strip of wallpaper around the room if the wallpaper costs $0.98

**math**

Samantha has five objects weighing 1kg,2kg,3kg,4kg and 5kg. If she weighs them two at a time, how many different weighs can she get?

**statistics**

one sample z-test

**Chemistry**

How many grams of HF will be made if you start with 29.6 grams of ammonia and fluorine is in excess?

**Writing Skills Part 3**

It's C

**Spanish**

Form complete sentences using the information provided. Use indirect object pronouns and the present tense of the verb. el vendedor/ traer/ las camisetas/ a mis amigos y a mí el vendedor traer la camisetas a mis amigos y a mi.

**Accounting**

A debit to the capital account was posted to an expense account. This would cause __________. A. assets to be overstated B. liabilities to be understated C. capital to be overstated D. expense to be understated i think its D

**Accounting**

A debit to a revenue account was posted to an expense account. This would cause __________. A. expenses to be overstated B. revenue to be understated C. expenses to be understated D. capital to be overstated i believe its C

**Accounting**

A credit to a liability account was posted to an owner's equity account. This would cause __________. A. assets to be overstated B. liabilities to be understated C. owner's equity to be understated D. net income to be overstated i think its D A credit to an asset ...

**Psyc**

3. Rita, a sports psychologist, has applied for a huge grant to study factors that will produce more winners in the next international competition.

**Math Ms Sue**

I know what you mean this is rediculous when a child doesn't even have a math book to bring home. well I tried Thank You

**Math**

Helping 3rd grade granddaughter and I am lost What property does this show? ****=* * * * This is all that is shown

**Math**

I am lost helping my 3rd grade granddaughter... This is what this problem shows and nothing else What property does this show? ****=* * * *

**science**

Using your reaction time, estimate the diestance a car would travel at 20m/s (45 mi/h) before you could apply the brakes. To get the deistance in meters you multiply the speed in m/s by your reaction time in seconds

**Math**

A quadrilateral contains two equal sides measuring 12 cm each with an included right angle. If the measure of the third side is 8 cm and the angle opposite the right angle is 120 degrees, find the fourth side and the area of the quadrilateral.

**Geometry**

A quadrilateral contains two equal sides measuring 12 cm each with an included right angle. If the measure of the third side is 8 cm and the angle opposite the right angle is 120 degrees, find the fourth side and the area of the quadrilateral.

**Math**

all good the bx but to the power of 2, not -2 then minus 2.

**Math**

The domain of y=the square root of bx to the power of two -2 is undefined, which of the following best describes the value of 'b'? a)b is less than or equal to 0 b)b<0 c)b=0 d)b is greater than or equal to 0

**chem**

Acetone is a common solvent and has a density of 0.7899 g/mL. What volume of acetone, in mL, has a mass of 40.6 g?

**Math**

how much simple interest does $2560 earn in 17 months at a rate of 5 1/8%?

**Math**

$2.75n + $2.00

**Algebra**

My problem is 48 a^ b to the 7th power all under the sq rt sign (don't know how to make the sign on my computer) I wasn't very clear before. Steve or anyone could you walk me through this...math (especially) algebra is NOT my forte'

**Algebra**

Simplify the radical expression square root 48a squared b to the 7th all beneath the sq rt sign I have no work to show, can't remember the steps to solve

**Math**

Thanks for the help Reiny!

**Math**

8-i/2+3i write complex # in standard form. I know to FOIL, not sure if I did it right, I got -13/4-9i then I'm not sure what to do next or if I'm done...so lost can anyone help me?

**Math**

7 billion chocolate chip cookies are consumed annually. In order to find out how many cookies are consumed on average by every person in the United States, what other information would you need to know in order to solve the problem?

**Rocket Science**

Calculate the minimum change in velocity (delta V or ∆V) required for the Space Shuttle to decrease its altitude to 60 miles if it’s orbiting with an apogee of 246 miles and a perigee of 212 miles above the surface of Earth

**science**

15 ml of satuated solution of potassium chloride in water at 50 degrees celecius is raised to 70 degrees celecius. How much more kcl will dissolve

**astronomy/physic**

If you’re trying to build a house north of an old pine forrest (∼50m tall trees). How far north must you be from the edge of the forrest in order to ensure that you see at least a bit of the Sun even during the winter solstice?

**math**

There were 845 million facebook users in 2011 and 608 million in 2010. What is the percent since Facebook is now used by 1 in every 13 people on earth? is the answer:7.69% 1 x x - - 13 100

**PLEEEEEAAAASE HELP WITH DIFFERENTIAL EQ PROBLEMS!!**

1) What are the equilibrium solutions to the differential equation and determine if it is stable or unstable with the initial condition y(-4)=1: 0.1(y+2)(4-y) 2) Use Euler's method with step size=0.5 and initial condition y(0)=3 to solve the equation y(0)=3 to estimate y(2...

**Advance Algebra**

yes

**Advance Algebra**

The concentration (in milligrams per liter) of an antibiotic in the blood is given by the geometric series: A + Aekt + Ae2kt + + Ae(n − 1)kt where A is the number of milligrams in one dose of the antibiotic, n is the number of doses, t is the time between doses, and k is...

**physics /astronomy**

If a system has multiple planets all in the exact same orbital plane, does the transit of one planet imply that all planets in the system must transit as well?

**English Writeacher**

I want to thank you for advice and help in my English course. On my 9 page final I missed 7 questions, but what was so bad it was on complex and compound complex sentences my weakness I knew. I made 93 on final. I have a 96.83 grade average for course. Again Thank You for help...

**English MS Sue**

Got my final exam test graded.i made a 93. he praised me for only missing 7 questions And they all were on the complex or compound complex sentences which were my weakness I know. proud that I got a 96.83 average for course. Thank You for the help and telling me of the sites ...

**Principles of Public Speaking**

When researching for supporting materials about the impact of violence in the media, it is a good idea to get assistance from this resource. A. Television B. Call-in radio C. Librarian D. Personal Interview

**Algebra**

y=25x+500 solve for x solve for y

**English**

Just to say Thank YOU everyone for the advice and help I have received. I have turned in my final exam. It was 9 pages and yes, I had to ask for advice and help, but I have really learned a lot. I will let ya'll know my outcome. It is nice to learn something new everyday!

**English**

Can I change the following sentence. I had to study and keep reviewing to succeed. to-----You must study and keep reviewing to succeed. Will this be an imperative sentence now?

**English**

I just saw where you helped me below. I left a question on the comment earlier. Thank You, Thank You

**English**

Trying to rewrite my paragraph. Wanted to say "This class has been a challenge, but very self gratifying to me." Is there another word beside gratifying I could use?

**English Ms Sue**

one more ? Can I cange I had to study and keep reviewing to succeed. --- You must study and keep reviewing to succeed. To use as an imperative sentence. I need all 4

**English Writeacher**

Thank You so much for pointing the Alas out to me. That would have been embarrassing. The professor has graded none of our papers for about 4 weeks, but at that time I had a 98 average. So I see I need to work a declarative sentence in there. Hey to be 63 out of school since ...

**English Ms Sue**

The last thing on my final is a paragraph I had to write, Using correct spelling and correct grammar, write a paragraph of five related sentences that discuss your experience in the English Grammar course. Using all four sentence types. Will you proof read for me? Alas, Lord...