# Posts by William

Total # Posts: 357

**Math - Calculus**

Show that the equation x^3-15x+c=0 has at most one root in the interval [-2,2]. Perhaps Rolle's Theorem, Mean Value Theorem, or Intermediate Value Theorem hold clues? ...Other than simply using my TI-84, I have no idea how to accomplish this.

*February 28, 2011*

**Math - Calculus**

Show that the equation x^3-15x+c=0 has at most one root in the interval [-2,2]. Perhaps Rolle's Theorem, Mean Value Theorem, or Intermediate Value Theorem hold clues? ...Other than simply using my TI-84, I have no idea how to accomplish this.

*February 28, 2011*

**Physics Craziness**

A big olive (m = 0.40 kg) lies at the origin of an xy coordinate system, and a big Brazil nut (M = 1.2 kg) lies at the point (1.0,2.0) m. At t = 0, a force o = (2.0 + 3.0) N begins to act on the olive, and a force n = (-3.0 - 2.0) N begins to act on the nut. In unit-vector ...

*February 28, 2011*

**Physics**

so for part b: d*sin(theta)=m*λ when you plug in the d from part a and λ and 90 degree for theta(maximum theta). you get m=6.8. This is for one side of the slit. You must subtract the missing fringes, 4 th one. you get m=5. m=10 for both side of the screen and add ...

*February 28, 2011*

**Physics**

A 91 kg man lying on a surface of negligible friction shoves a 75 g stone away from himself, giving it a speed of 4.0 m/s. What speed does the man acquire as a result?

*February 26, 2011*

**Physics**

Left over from the big-bang beginning of the universe, tiny black holes might still wander through the universe. If one with a mass of 3.5 1011 kg (and a radius of only 1.0 10-14 m) reached Earth, at what distance from your head would its gravitational pull on you match that ...

*February 19, 2011*

**Basic Math**

what is 5/30 + 3/40 + 1/8

*February 14, 2011*

**math**

Olivia picked 2.5 kilograms of cherries. She divided the cherries evenly among 10 small baskets. How much did each basket hold?

*February 10, 2011*

**spelling**

Can I replace the word to with from in the following sentence: Laura often lost her homework on the way to school.

*January 26, 2011*

**Physics- Angular Momentum**

Hi Miki! I think we are taking the same physics class... I'd like to possibly share insights about the material and possibly help each other out in a mutually beneficial way. If you are interested, shoot me an email at William dot Cordoba at yaho dot com Thanks William

*December 28, 2010*

**math**

What two numbers have a product of 3.6 and a sum of 3.8?

*December 13, 2010*

**Spanish**

Need ten names of famous men and women who are of spanish descent

*December 11, 2010*

**chemistry**

how many grams of Na2CO3 must be dissolved into 155 g of water to create a solution with the molality of 8.20 mol/kg?

*December 6, 2010*

**calc2**

A manufacturer sells two products, one at a price of $3000 a unit and the other at a price of $12000 a unit. A quantity q1 of the first product and q2 of the second product are sold at a total cost of $5000 to the manufacturer. Express the manufacturer's profit, as a ...

*December 1, 2010*

**6TH GRADE MATH**

Repost perimeter is 30 and area 36

*November 29, 2010*

**Math 6th grade**

What is the answer the perimeter is 30 and the area is 3??

*November 29, 2010*

**physics help**

An auto race is held on a circular track. A car completes one lap in a time of 16.9 s, with an average tangential speed of 48.1 m/s. Find the following (a) the average angular speed (b) the radius of the track i found part a which was .3716 but need help with part b please

*November 19, 2010*

**help me physics**

The femur is a bone in the leg whose minium cross-sectional area is about 3.60 E-4 m2. A compressional force in excess of 6.90 E4 N will fracture this bone. (a) Find the maximum stress that this bone can withstand. 1 N/m2 (b) What is the strain that exists under a maximum-...

*November 16, 2010*

**algebra**

.identify what each leters represents. the perimeter of a rectangle is twice its length plus twice its width

*November 9, 2010*

**algebra**

.identify what each leters represents

*November 9, 2010*

**algebra**

if y = x-19, what is the value of x when y=34?

*November 9, 2010*

**lakewood park**

the rule for input output table divide m by 3 what is m

*November 8, 2010*

**chemistry**

How do you calculate the energy released when 1 mole of ethanol, C2H5OH, is burned?

*November 7, 2010*

**Science**

How much would a 75 kg man weigh due to the effect of gravity?

*November 4, 2010*

**sculpture**

Look at their shape, their both stacked and they look like a touch could just make it collapse.

*October 28, 2010*

**alegrba 2**

R(p)=-2.5p^2+600p

*October 19, 2010*

**arithmetic**

Two arithmetic progression have thd same first and last terms.the first arithmetic progression has 21 terms with a common difference of 9.How many terms has the other arithmetic progression if its common difference is 4?working and answer.thans

*October 14, 2010*

**3rd grade math (array)**

rock bands often stack their speakers in an array. one teen band has 24 speakers. they stack them at least 2 high, but no taller than 8 high. what are all different arrays they can make?

*October 7, 2010*

**Answer Check Please**

Andy and William work together to build a toy house. It will take William 5 hours and Andy 4 hours, or William 10 hours and Andy 2 hours to finish their work. If William works alone, how many hours will it take to finish his work? I say 15 is the answer.

*September 30, 2010*

**Accounting please help in homework**

The overall (weighted average) cost of capital is composed of a weighted average of : a)The cost of common equity and the cost of debt b)The cost of common equity and the cost of preferred stock c)The cost of preferred stock and the cost of debt d)The cost of common equity, ...

*August 5, 2010*

**Accounting please help in homework**

Question No: 1 Mr. A, as a financial consultant, has prepared a feasibility report of a project for XYZ Company that the company is planning to undertake. He has suggested that the project is feasible. The consultancy fee paid to Mr. A will be considered as: a)Sunk cost b)...

*August 5, 2010*

**Math**

The digits of a two-digit number are reversed. When both these two-digit numbers are added, the result is 88, and when subtracted, the result is 54. The original two-digit number contains which of the following digits? 2 3 5 7

*July 27, 2010*

**sum**

The sum of the first X consecutive even numbers is 930. Find X.

*July 22, 2010*

**adult education**

What routes were utilized for romantrade with china?

*July 16, 2010*

**Math**

A weighted coin has the property that the Heads comes up 60 percent of the time. On two flips of the coin, is it more likely that the outcomes from the two flips are the same, or the outcomes from the two flips are different?

*July 15, 2010*

**English 101**

b,a,b,b,a,c,a,b,c,a,a,b

*June 30, 2010*

**economics**

i have some questions please help Transportation equipment that was purchased in 2004 for $200,000 must be replaced at the end of 2009. what is the estimated cost of the replacement, based on, the following equipment cost index: Year INDEX YEAR INDEX 2004 223 2007 257 2005 238...

*June 3, 2010*

**Square root function range alg.1**

3 multiplied by x end of quantity minus 1 equals negative 4.

*May 26, 2010*

**math**

please help ..

*May 16, 2010*

**math**

hi if i wanna find the Maclaurin series from another existing series by integrating that series , do i need to include the constant of integration ?? Thanks

*May 16, 2010*

**series**

hi, could any one explain how to find the interval of convergence of ln(1+x) series ? thanks

*May 2, 2010*

**improper integral**

can any one explain how to evaluate this improper integral i.e. the function is not continuous at 0 neither at inf integration of [(e^(-sqrt(t)))/sqrt(t)]dt from 0 to infinity the integration part is easy but i want only how to evaluate it thanks

*May 2, 2010*

**math**

yeah the integration is right but I was meaning that the integral is improper i.e. the function is not continuous at 0 neither at inf so how could we evaluate the integration? thanks for ur reply

*April 30, 2010*

**math**

can any one explain why this integral diverges ? integration of [(e^(-sqrt(t)))/sqrt(t)]dt from 0 to infinity thanks

*April 30, 2010*

**physics**

Two disks are mounted (like a merry-go-round) on low-friction bearings on the same axle and can be brought together so that they couple and rotate as one unit. The first disk, with rotational inertia 3.30 kg·m2 about its central axis, is set spinning counterclockwise at...

*April 18, 2010*

**science**

Lily walked 2 blocks east, then 1 block south. How would you determine her total displacement?

*April 7, 2010*

**germs**

i nedd pics of common germs

*February 18, 2010*

**Intermediate Accounting**

need help

*February 7, 2010*

**Intermediate Accounting**

debit to deferred tax asset

*February 7, 2010*

**Math**

Instructions: Use point - slope form of each equation to identify a point the line passes through and slope of the line. Problem: y-2=3/4(x+9)

*February 4, 2010*

**English 101**

1 is not 2 is

*January 28, 2010*

**College chemistry**

55.078

*January 18, 2010*

**Social Studies**

probably a insult.

*January 6, 2010*

**Language Arts**

Do you need any virutes about Andrew Clements (author for Frindle) If so, tell why for each.

*January 5, 2010*

**world history**

it brought the french together with the native americans in what is now canada. the native americans would trade them bever furs for thinks such as livestock. they bever furs were special because they are water resistant.

*January 1, 2010*

**Triginometrry**

Thank you so much!

*January 1, 2010*

**Triginometrry**

please help this is due Monday!

*January 1, 2010*

**Triginometrry**

Solve an equation 8x^3+4x^2-18x-9=0 algebraically for all values of x.

*January 1, 2010*

**Triginometry**

For which equasion does the sum of the roots equal 3/4 and the product of the roots equal -2? (a)4x^2-8x+3=0 (b)4x^2+8x+3=0 (c)4x^2-3x-8=0 (d)4x^2+3x-2=0

*January 1, 2010*

**Tirginometry**

Thank you once again

*January 1, 2010*

**Tirginometry**

the expression 4ab(square root of)2b-3a(square root of)18b^3+7ab(square root of)6b is equivalent to... (a)2ab(square root of)6b (b)16ab(square root of)2b (c)-5ab+7ab(square root of)6b (d)-5ab(square root of)2b+7ab(square root of)6b Please help its due monday!

*January 1, 2010*

**Triginometry**

yes, thank you for the help

*January 1, 2010*

**Triginometry**

Solve 2x^2-12+4=0 by completing the square, expressing the result in simplest radical form.

*January 1, 2010*

**math**

can you help me solve this?. 10>n-1

*December 18, 2009*

**physics**

Three identical balls are thrown from a cliff of height, h, above a horizontal plane. One ball is thrown at an angle of 45 degrees above the horizon, the second is thrown horizontally, and the third is thrown at an angle of 30 degrees below the horizon (so, part of this ...

*December 2, 2009*

**math**

write the whole fraction as a whole or mixed number, 13/8?

*November 23, 2009*

**french**

po box 645 nsawam

*November 18, 2009*

**math**

its 0

*November 15, 2009*

**Chemistry**

A compound containing 3 atoms of carbon and 8 atoms of hydrogen is combined in a reaction with oxygen molecules. The two end products of this equation are carbon dioxide and water. What element should you look at first in balancing this equation? A. oxygen B. Hydrogen C. ...

*November 7, 2009*

**Chemistry**

Which of the following elements does not form bonds easily because it has a full outer shell? A. Aluminum B. Carbon C. Helium D. Calcium

*November 7, 2009*

**chemistry**

what mass of water is needed to react with 10.0 grams of PI3?

*October 19, 2009*

**math**

how do i solve for x ... with excel preferbly. 0=4x^3x2.14x10^-4x^2+2.0x10^-9x-3x10^-11 thanks!

*October 7, 2009*

**English**

The irony is that, despite the fact that the two women (Lena and Ella) have committed similar acts. They are treated very differently. You would expect that similar crimes would warrant similar punishment, but that doesn't happen. Situational irony.

*October 6, 2009*

**math**

16x29

*September 27, 2009*

**algebra**

I don't knw how to do fraction equations!! eg. 1/2x + 1/5 = 4

*September 8, 2009*

**chemistry**

Which type of fat is easier to break down, saturated or unsaturated? Why?

*August 28, 2009*

**Science**

You will find 3 of these in ATP. a)hydroxyl group b) amino group c) phosphate group d) carboxyl group

*August 28, 2009*

**general science**

Carbon

*August 9, 2009*

**medical records**

Self-funding is an alternative to fully insured group health insurance plans. Instead of an insurance company collecting premiums and paying your claims, the company funds the program, sets the rules and has control over paying claims. More than 60 percent of U.S. companies ...

*July 27, 2009*

**latin**

Could anyone translate this paragraph for me? i can not figure it out! Sum servus Romanus quod Romani meam patriam occupabant. In proeliis cum Romanis non pugnabam. Mea patria erat Graecia, et nunc mea familia in Graecia habitat. Mox mea familia ad Italiam navigabit. Nunc in ...

*May 14, 2009*

**Program Planning**

1xa

*April 26, 2009*

**NHP**

Was war between Japan and the United States impossible to avoid by 1941

*March 16, 2009*

**math**

how does the lower quartile of the data compare to the least value of the set. 99 88 59 68 57 38 34 25 29 28 i put there is a 12.5 difference between the lower quartile and the lowest value of the set...my teacher marked it wrong and i don't understand why

*March 15, 2009*

**3ud grade Math**

you rock...

*March 2, 2009*

**Can someone please give me feedback on my SAT essa**

There will always be “another explanation” I don’t believe anything is set in stone. The world would be too simple if there was only one way to do everything, and so far, as I described in my two events in class, it doesn’t matter what the situation is, ...

*February 16, 2009*

**Can someone please give me feedback on my SAT essa**

During book discussions in my Literature class, I would always debate issues with my neighbor Alena, because we had different point of views. In one of our books, As I Lay Dying there was one character, Vardaman, who I perceived as mentally ill, but Alena interpreted his lines...

*February 16, 2009*

**Can someone please give me feedback on my SAT essa**

There are always many points of views. One day in my AP European History class, my teacher told us to all sit in or seats as she wheeled out a cart covered with a table cloth. When we were all seated, she revealed the cart, which was a display of rubber, ducks like a mountain ...

*February 16, 2009*

**Can someone please give me feedback on my SAT essa**

i wrote a sample sat essay... can you guys just give me some feedback as to how i should work to get my essays score higher? PROMPT: IS THERE ALWAYS ANOTHER EXPLANATION OR POINT VIEW? In this world, multiple points of views is inevitable. Though many might think that there is ...

*February 16, 2009*

**Math**

how to math i need want

*February 8, 2009*

**7th grade pre algebra**

5/6t + 4 = 2 - 1/6t Is the best thing to do first in this case to get rid of the fractions? Should I turn them into decimals or multiply both sides by 6? And when I multiply by 6, do I multiply each factor by 6. SO it becomes 5t + 4(6) = 2(6) -t ? Thanks.

*November 6, 2008*

**7th grade pre algebra**

Thank you! I had figured it out four ways the wrong way. Don't know what I'm doing wrong. Think it may have to do with the MiDAS rule or something but cannot figure it out.

*November 6, 2008*

**7th grade pre algebra**

We need assistance solving 3 + 2(k+1) = 6 + 3k I know the 2(k+1) has to become 2k + 2 then we have 3 + 2k + 2 = 6 + 3k then we can subtract 3k from both sides to get 3 +2k + 2 - 3K = 6 But can I combine the 3+2 on the left and the 2k - 3k to get -1k? leaving us with 5 -1k = 6...

*November 6, 2008*

**social studies**

In this government. pme group is in charge of the money and economics of the country. They also have all the power. What type of government is this?

*October 30, 2008*

**science**

That escalated quickly

*October 22, 2008*

**nonfiction**

kourtney is completly correct just took test 100%

*October 1, 2008*

**7th grade**

Which changes temperature more rapidly, land or water

*September 30, 2008*

**physics**

33.17

*September 30, 2008*

**history**

the puritans missionary efforts to convert indians to christians were

*September 7, 2008*

**algebra 2**

Let section B has x seat , section C has y seat. section A has (x+y)seat (x+y)+x+y =49000 x+y = 24500 equation1 25(x+y)+20x +15y = 1052000 equation2 9x+8y= 210400 equation2 solving eqn.1 & eqn. 2 by substitution method you will get x=14400 y=10100 section A =24500 section B =...

*September 4, 2008*

**Sci**

Form new substance (new structure) Liberate energy Form new molecules Change bonding

*September 3, 2008*