Wednesday

April 1, 2015

April 1, 2015

Total # Posts: 79,578

**Chemistry **

The standard heat of combustion of eicosane, C20H42 (s), a typical component of candle wax, is -1.332 x 104 kJ/mol (consider this number to be exact in your calculations), when it burns in pure oxygen, and the products are cooled to 25°C. The only products are CO2 (g) and ...
*March 23, 2015*

**finance**

investment requires an initial oulay of 105,000 and will generate cash inflow of 20000 for 11 years. What is the NPV using discount rate of 8%
*March 23, 2015*

**Geometry 2**

What is the area of the regular pentagon below? The five sides are 20 Ft each
*March 23, 2015*

**Math**

after pulling into a parking spot, ms. Felix backed her car up 2 ft. write an expression with absolute value to show the distance she traveled after pulling into the parking spot
*March 23, 2015*

**Science**

he current atomic model would be revised if A. better microscopes were being used to study its structure. B.better microscopes are invented in the future. C. new information about an atom's structure is discovered. D. a new element is discovered in the future I thiink it is C
*March 23, 2015*

**Math**

Cafeteria Lunch Buffet A cafeteria lunch buffet has the salads shown. 6 chicken salads 10 egg salads 8 tuna salads p pasta salads The cafeteria workers plan to make twice as many fruit salads as tuna salads and pasta salads combined. Part A Using p to represent the number of ...
*March 23, 2015*

**Math**

Cafeteria Lunch Buffet A cafeteria lunch buffet has the salads shown. 6 chicken salads 10 egg salads 8 tuna salads p pasta salads The cafeteria workers plan to make twice as many fruit salads as tuna salads and pasta salads combined. Part A Using p to represent the number of ...
*March 23, 2015*

**Geometry B**

A kite has diagonals 5.3 ft and 6 ft. What is the area of the kite? • 5.65 ft² • 15.9 ft² • 31.8 ft² My answer??? • 22.6 ft²
*March 23, 2015*

**Algebra**

An artifact was found and tested for its carbon-14 content. If 76% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? (Carbon-14 has a half-life of 5,730 years.)
*March 23, 2015*

**algebra 2 **

1) 4 quinta sqrt(3x+1)-8=0 2) cube root(5m+6)+15=2
*March 23, 2015*

**Biomechanics**

jane is a 45 kg cyclist. If her bike weighs 100 N and she landed with her bike on the floor at a vertical reaction force of 890 N, what was her vertical acceleration during landing?
*March 23, 2015*

**geometry**

Harold has a photograph that is 8 in. Test Image 10 in. that he wants to print at a reduced size to fit into a frame that is 6 in. tall. What will be the dimensions of the new photograph?
*March 23, 2015*

**SS**

Thanks! I'll look into the physical geography one.
*March 23, 2015*

**SS**

Sources of revenue and language.
*March 23, 2015*

**SS**

What is a difference between East, North, and West Africa? The difference can be anything (government, culture, religion, etc.). I have two down and need one more.
*March 23, 2015*

**Math**

Thanks
*March 23, 2015*

**Math**

Divide the polynomial. (16x^5y^4 + 6x^3y - 2x^2y - 24x^2y^4) by -2x^2y
*March 23, 2015*

**english**

English is the language opportunity why bother to teach indigeneous language?
*March 23, 2015*

**Trig**

An isosceles triangle has legs 4 feet long. If the vertex angle measures 30 degrees, find the length of the base.
*March 23, 2015*

**physics**

A 20.0 kg box slides down a 12.0 m long incline at an angle of 3.0 degrees with the horizontal. A force of 50.0 N is applied to the box to try to pull it up the incline. The applied force makes an angle of 0.00 degrees to the incline. If the incline has a coefficient of ...
*March 23, 2015*

**Math**

f a contractor pays an average wage of $20.00 per hour and wants to make a 15% mark-up on the cost of labour, what will the contractor charge as an average labour cost on contracts?
*March 23, 2015*

**math**

If m=n,then m−n = n−m = 0. Give a counterexample to show that the conditional is false
*March 22, 2015*

**analytical tools**

The survival rate during a risky operation for patients with no other hope of survival is 74%. What is the probability that exactly four of the next five patients survive this operation? (Give your answer correct to three decimal places.)
*March 22, 2015*

**Chemistry help**

Why it is important for there to be no further bubbling before the final mass of the reaction beaker is obtained?
*March 22, 2015*

**Chemistry help**

Why is it important for the reaction beaker to be completely dry before weighing?
*March 22, 2015*

**Probability and Statistcis**

Students from a statistics class were asked to record their height in inches. The heights ( as recorded) were: 65, 72, 68, 64, 60, 55, 73, 71, 52, 63, 61, 74, 69, 67, 74, 50, 4, 75, 67, 62, 66, 80, 64, 65 Find five number summary.
*March 22, 2015*

**Urgent geometry help**

In the bottom left hand corner. The sides are blank. I'm just confuses on how to find the sides & finding the perimeter & area
*March 22, 2015*

**Urgent geometry help**

On a isosceles triangle, how would you find the area and perimeter when given the bases: 12 and 32 and a 45 degree angle?
*March 22, 2015*

**Chemistry**

A sodium chloride solution has a density of 1.22 g/mL. How many moles of NaCl are dissolved in 10.0 mL of the solution? The density of water is 1.00 g/mL. My solution: ? mol NaCl = 10 mL*1.22 g/1mL*1mL/58.5g The correct answer is 3.76E-2 mol. Please help!
*March 22, 2015*

**Math**

Please help
*March 22, 2015*

**Math**

I had a table of values. X / Y -3/ 2.5 -2/ 5 -1/ 6.5 0 / 7 It asks without graphing. Does it open upward or downward. I got that in the quadratic equation. a= -0.5 And if a is smaller than 0. It opens downward However. The text book says it opens upward. So I'm confused
*March 22, 2015*

**s.s**

The answer is B.
*March 22, 2015*

**Business Management**

We can help you on any Assignment . We are team of talented, dedicated professionals ready to help you get your Assignment done; we are nurturing powerful collaboration - from creative Writers, intuitive Market Researchers, Strategists, and great Web Developers. Our team can ...
*March 22, 2015*

**Physics **

A motor boat is traveling at a speed of 2.4 m/s shuts off its engine at t=0. How far does it travel before coming to a rest if it is noted that after 3 seconds its speed has dropped to half of its original value? Assume that the drag force of the water is proportional to v. (R...
*March 22, 2015*

**Physics **

a car goes over a circular hill of 50m radius at a constant speed of 20m/sec . What is the force of the car on the 600N driver at the top of the hill.?
*March 22, 2015*

**Chemistry**

sorry it's 0.00376 mol.
*March 22, 2015*

**Chemistry**

no the correct answer is apparently 0.0376 mol...is there a way to get that?
*March 22, 2015*

**Chemistry**

*correct answer is 3.76*10^-2
*March 22, 2015*

**Chemistry**

A sodium chloride solution has a density of 1.22 g/mL. How many moles of NaCl are dissolved in 10.0 mL of the solution? The density of water is 1.00 g/mL. My solution: ? mol NaCl = 10 mL*1.22 g/1mL*1mL/58.5g The correct answer is 3.76*10^2 mol. Please help!
*March 22, 2015*

**Math**

Horses are measured in units called hands. One hand equals 1/3 foot. A horse is 5 1/3 feet tall. How tall is this horse in hands?
*March 22, 2015*

**Biology**

How is that? I got 4 Ttyy, 4 TtYy, 4 TTYy, and 4 TTyy. Ttyy an TTyy are both tall+green, and TtYy and TTYy are both yellow.
*March 22, 2015*

**Biology**

If green is yy, then it is 12 tall+yellow and 4 tall+green
*March 22, 2015*

**Biology**

What is the phenotype ratio for TTyy X TtYy? Is it 8:8 for tall + yellow to tall + green?
*March 22, 2015*

**Biology**

In anaphase of mitosis, the sister chromatids are separated and pulled to the poles. How do these chromatids, which are only half of a duplicated chromosome, become chromosomes? As I understand it, mitosis produces daughter cells that are identical to the parent cells.
*March 22, 2015*

**Psychology help**

What's a good theme that goes with the idea of encouragement?
*March 22, 2015*

**English**

Try to choose an answer that will capture your reader's attention.
*March 22, 2015*

**Chemistry**

Can someone please answer one of these question so I would be able to know how to do the others? 1. What volume of 0.275 M KOH (aq) must be added to 75.0 mL of 0.137 M H3AsO4 (aq) to reach (a) the first stoichiometric pony; (b) the second stoichiometric point 2. What volume of...
*March 22, 2015*

**heat transfer**

a. Steam at 230oC flows through a steel pipe ( = 15/. ) whose inner and outer diameters are 9 cm and 10 cm, respectively in an environment at 15oC. The pipe is insulated with 5 cm thick fiberglass ( = 0.035/. ). The given heat transfer ...
*March 22, 2015*

**Psychology & operational definition**

Examples of what?
*March 22, 2015*

**Intro statistics**

A bag contains 7 red, 6 orange, and 9 green jellybeans. What is the probability of reaching into the bag and randomly withdrawing 11 jelly beans such that the number of red ones is 7 the number of orange ones is 1 and the number of green ones is 3?
*March 21, 2015*

**Physics**

A motor boat is traveling at a speed of 2.4 m/s shuts off its engine at t=0. How far does it travel before coming to a rest if it is noted that after 3 seconds its speed has dropped to half of its original value? Assume that the drag force of the water is proportional to v. (R...
*March 21, 2015*

**Physics**

a 2.00 kg object has a velocity of 4.00i -3.00j m/s. What is the kinetic energy at this moment? What is the net work done on the object if its velocity change 6.00i +2.00j m/s
*March 21, 2015*

**Physics**

Yeah I got 600- 61.2(40)/50 =551.64. I do not know if that is right .
*March 21, 2015*

**Physics**

what is 600N-600/g*20^2/50 ? mg-mv^2/r
*March 21, 2015*

**Physics **

a car goes over a circular hill of 50m radius at a constant speed of 20m/sec . What is the force of the car on the 600N driver at the top of the hill.?
*March 21, 2015*

**chemistry**

you by adding now have four significant figures. When adding, you keep all place values that were significant. if it had been 34 + 12.2+6.0=52. Cant do the tenths, as tenths was not significant in the first numeral.
*March 21, 2015*

**geography**

Bogotá, Colombia's capital city, is located where?
*March 21, 2015*

**English check**

Is it b?
*March 21, 2015*

**English check**

Which quote believes that all of us have the ability to love? A. "Love is a binding force between two things that compels them to come together..." B. "Yet we do have the capacity to love not only other humans, but animals as well." C. "love would not ...
*March 21, 2015*

**math**

adult tickets are $17, student tickets are $9. how many adult and student tickets need to be sold to make a profit of $4,400?
*March 21, 2015*

**geometry**

Construct an equilateral of altitude 5.5 cm
*March 21, 2015*

**maths**

ABC is an isosceles triangle inscribed in a circle. If AB and AC is 2.5cm and BC is 14cm find the radius of the circle
*March 21, 2015*

**math**

ABC is an isosceles triangle inscribed in a circle. If AB and AC equal to 2.5cm and BC is 14cm find the radius of the circle
*March 21, 2015*

**Quick English check**

"I've had the time of my life" written by markowitz, Donald
*March 21, 2015*

**Quick English check**

'Cause I've had the time of my life And I owe it all to you I've been waiting for so long Now I've finally gound someone To stand by me We saw the writing on the wall As we felt this magical fantasy 4. Read stanza two... The tone of this stanza can be best ...
*March 21, 2015*

**Quick English check**

"I've had the time of my life" (song) written by markowitz, donald
*March 21, 2015*

**Quick English check**

Now with passion in our eyes There's no way we could disguise it secretly So we take each other's hand Because we seem to understand the urgency In the third stanza, the word disguised means- A. Inportance B. Dress up as C. Hide D. Change appearance I chose C. 2. Which...
*March 21, 2015*

**physics**

the mass of the sun is 2×10^30kg.the mass of a proton is 2×10^-27kg.if the sun was made only of protons.calculate the number of protons in the sun?
*March 21, 2015*

**urban management**

To prevent settling of organic matter a Vs should be
*March 21, 2015*

**social studies**

what is 1?? what is 3?
*March 21, 2015*

**maths!!!!!!**

it is g.p not a.p!!!!!
*March 21, 2015*

**Math**

Skate boarding boys= 2 girls=1 What percentage of the total students chose skateboarding? A. 10% B. 20% C. 30% D. None of these Is the answer D? Thank you
*March 21, 2015*

**French**

For, A. wouldn't it be veut'elle because of the vowel beginning of elle?
*March 20, 2015*

**French**

I would like to double check my work: A. Invert the following: Est-ce qu’elle veut boire un apéritif? Answer: Bois qu'elle un apéritif? B. Make the following statement negative: Nous allons au cinéma et au théâtre. Answer: Nous n'...
*March 20, 2015*

**math**

Silvia has twice as much money invested at 5% simple interest as she does at 4%. If her yearly income from the two investments is $266, how much does she has at each rate? 4% = 5% =
*March 20, 2015*

**English**

Hello. I am having trouble writing an essay for this topic: What is the importance of taking advice and suggestions from others? I was wondering if someone could give me some tips and some inspiration on how to write this. I'am still stuck on the introductory paragraph. ...
*March 20, 2015*

**math 5th grade**

Thanks jai !! So much
*March 20, 2015*

**Trigonometry**

Determine the least positive coterminal of the angle 943degrees
*March 19, 2015*

**math(Discrete)**

Give the negation of the statement ∃! x ∈ U [P (x)].
*March 19, 2015*

**physics**

1/2 + pofkw
*March 19, 2015*

**Math**

A photo is 6 in wide and 3 in tall. If it is reduced to a height of 1 in, how wide will it be?
*March 19, 2015*

**Math**

A photo is 6 in wide and 3 in tall. If it is reduced to a height of 1 in, then how wide will it be?
*March 19, 2015*

**Math**

A ball is placed on a long inclined ramp. It rolls down the ramp as shown in the diagram. The equation d = 23 · t2 represents the distance in feet, d, the ball travels in t seconds. Part A How far does the ball travel in 5 seconds? Show your work. Part B How many ...
*March 19, 2015*

**Math**

The interger is x<t<y
*March 19, 2015*

**Math**

The equation d = 23 · t2 represents the distance in feet, d, the ball travels in t seconds. Part A How far does the ball travel in 5 seconds?200 feet in 5 seconds. Show your work. Part B How many seconds would it take for the ball to travel 25 feet? Show your work. Part...
*March 19, 2015*

** Social studies**

What was the first act of the British government to cause colonial anger and what year did it take place?
*March 19, 2015*

**S.S**

". . . But now, after reiterated menaces, Mexico has passed the boundary of the United States, has invaded our territory and shed American blood upon the American soil. She has proclaimed that hostilities have commenced, and that the two nations are now at war. "As ...
*March 19, 2015*

**French**

No, it's "vient."
*March 19, 2015*

**French**

Il vient d'aller à la piscine. Does this mean, "I just went to the pool"?
*March 19, 2015*

**S.S**

Then is it D
*March 19, 2015*

**S.S**

Which question would best help you write a report regarding the changes to the political system during Jackson's presidency? A. How did Andrew Jackson react to the results of the election of 1824? B. When did Andrew Jackson decide to run for president? C. Did Andrew ...
*March 19, 2015*

**Geography**

What is the average temp in Alaska?
*March 19, 2015*

**Math**

38 ounces=____lb ____oz
*March 19, 2015*

**Civics**

Sorry bout caps! Just saw + realized.
*March 19, 2015*

**Civics**

i GOT IT! iT IS ACTUALLY The Articles of Confederation did not work.
*March 19, 2015*

**Civics **

The Preamble includes the phrase "to form a more perfect union." Why is this reason listed for creating a new Constitution? Plans were made to expand to the Pacific Ocean. The British had provided economic support. The Articles of Confederation did not work. Some ...
*March 19, 2015*

**social studies**

Conflicto resultón
*March 19, 2015*

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