Monday

September 26, 2016
Total # Posts: 433

**Physics check my answer please**

The atmosphere on Mars is almost all carbon dioxide (CO2), and has a pressure of about 6.9×102 Pa, much less than that of Earth. At −22°C (a warm day on Mars), what is the mass of one cubic meter of the atmosphere? (Assume the atmosphere is completely CO2.) I ...

*June 22, 2012*

**Calculus grade 12**

dy/dx = (1y)+ (x)dy/dx + 5x^4y^2 + 2x^5y(dy/dx) + 9x^2 -y - 5x^4y^2 - 9x^2 = x(dy/dx) + 2x^5y (dydx) (-y -5x^4y^2 -9x^2)/ (x + 2x^5y) = dy/dx

*June 21, 2012*

**English(check)**

His long, red beard fascinated the little boy. One scraggly, leafless plant sat in the window. I followed the trail of sticky, green goo. Roxanne showed me her new, wireless modem. An experienced mechanic, Alan, has a busy shop and a full schedule. Under the bed, in Jerri’...

*June 21, 2012*

**math**

A tank, with a rectangular base and having vertical sides of height 4 m, is initially full of water. The water leaks out of a small hole in the horizontal base of the tank at a rate which, at any instant, is proportional to the square root of the depth of the water at that ...

*June 21, 2012*

**Pre-calc**

Haha, right, thanks.

*May 30, 2012*

**Pre-calc**

Find the Degree Measure of the angle between the vectors. U=-4i+4j V=-4i+4j

*May 30, 2012*

**chemistry**

Looking for help with this too

*May 29, 2012*

**Pre-calc**

Heres the equation y^2 -4x^2 +8x=20 For the center i got (-1,0) For the vertices i got (-1,4), (-1,-4), (1,0), (-3,0) And how do you find the foci?

*April 29, 2012*

**Pre-calc**

Haha ok i totally get it thanks!

*April 29, 2012*

**Pre-calc**

Thank you guys so much :)

*April 29, 2012*

**Pre-calc**

Heres the equation: (x^2)-(4y^2)-(4x)+(24y)-(36)=0 Your supposed to find the coordinates of the center, foci, and vertices, and the equations of the asymptotes of its graph. So first you complete the square right? (x^2 -4x+4)-4(y^2 +6y+9)=36+4+36 [((x+2)^2)/76] -[(y+3)^2)/19]=...

*April 29, 2012*

**general science**

0.o8

*April 18, 2012*

**physics please help ! **

A helicopter is ascending vertically with a speed of 5.20m/s . At a height of 110m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground? [Hint: for the package equals the speed of the helicopter.]

*April 15, 2012*

**Pre-calc**

Could you possibly elabarate a little on to how you got those numbers please :) thanks you!

*April 9, 2012*

**Pre-calc**

An investment firm has a job opening with a salary o $30,000 for the first year. Suppose that during the next 39 years, there is a 5% raise each year. Find the total compensation over the 40-year period.

*April 9, 2012*

**CHEMISTRY**

A second-order reaction has a rate constant of 1.65 M–1 s–1. If the initial reactant concentration is 1.0 M, calculate the time (in seconds) required for the reaction to become 90% complete. i got 0.06734 seconds but thats incorrect i have no idea what i am doing ...

*March 28, 2012*

**Math**

Is it reasonable to interpret -16 & + 11 have the sum of 5. If not please explain

*March 24, 2012*

**Math**

A sphere is inscribed in a right cone. The slant height of the cone = the diameter of the base of cone. If the radius of the sphere is r, find the volume of the cone in terms of r.

*March 22, 2012*

**math**

explain how you could use grid paper to draw a rectangle with a perimeter of 18 units

*March 20, 2012*

**English**

Original sentence: The urgent care center offers a variety of services such as physician appointments, mental health, health education programs, and lab and X-ray work. My corrections: The urgent care center offers physician appointments, mental health evaluations, health ...

*February 29, 2012*

**Math**

Ned caught 1/3 pound of fish. Sarah caught 5/12 pound of fish. Jessica caught 1/6 pound of fish. Which diagram shows how to find how many pounds of fish they caught altogether. 2/6 2/6 1/6 3/12 5/12 6/12 1/3 5/12 1/6 1/12 5/12 1/12

*January 26, 2012*

**Math**

Ms. Sue. Are any of them correct

*January 26, 2012*

**Math**

Ned caught 1/3 pound of fish. Sarah caught 5/12 pound of fish. Jessica caught 1/6 pound of fish. Which diagram shows how to find how many pounds of fish they caught altogether. 2/6 2/6 1/6 3/12 5/12 6/12 1/3 5/12 1/6 1/12 5/12 1/12

*January 26, 2012*

**Math**

Damon, how did you get your answer?

*January 26, 2012*

**math**

Katie is 3/5 of the way to Brianna's house. Larry is 7/10 of the way to Brianna's house. How much closer to Brianna's house is larry

*January 26, 2012*

**Math**

Glenda wrote 1/7 of her paper on Monday, 1/14 of her paper on Tuesday, and 2/28 of her paper on Wednesday. She said she wrote more than half of her paper. Is she correct? Why or why not?

*January 26, 2012*

**Math**

Glenda wrote 1/7 of her paper on Monday, 1/14 of her paper on Tuesday, and 2.28 of her paper on Wednesday. She said she wrote more than half of her paper. Is she correct? Why or why not?

*January 26, 2012*

**English**

What does the things you carry say about you? The things we carry is largely determined by ________.

*January 22, 2012*

**math**

If you have a calulator TI-30XIIs put in your numbers 3474.8 on your upper left side press 2nd button;next press the button the right (DRG) the screen will flash the following: FLO SCI ENG with your right arrow(far right side) set it to SCI (scientific mode) press = and it ...

*December 1, 2011*

**algebra**

x+9>12 x+9-9>12-9 x>3

*December 1, 2011*

**organic chem**

Thank you DrBob It makes sense since the PI(point of inflection)is calculated by adding the two pk values and dividing it by 2...Pk1/2+ Pk2/2= PI

*December 1, 2011*

**organic chem**

In the Titration of amino acids Glycine and Lysine Which data can be obtained with greater accuracy? 1.the pK values from the "legs" ? 2.the isoleric point from the point of inflection?

*December 1, 2011*

**5TH GRADE MATH**

I NEED HELP FINDING THE VARIABLE FOR THE FOLLOWING:57-BLANK-BLANK-33-BLANK-17

*November 30, 2011*

**organic chem**

Which data can be obtained with greater accuracy-the pK values from the "legs" or the isoleric point from the point of inflection? Titration of amino acids Glycine and Lysine

*November 30, 2011*

**ALGEBRA**

Combine and Simplify 2 + t/t-3 - 18/t^2-9 - Please explain

*November 5, 2011*

**math146**

8-3 ... thank u ..

*November 3, 2011*

**math146**

equation for subtract the result in C form the result in A ... is it C - A

*November 3, 2011*

**chemistry ASAP**

okay , the website you put does not work. But one last question. for sodium hydrogen arsenate it says to give the correct formula. how do i go about doing that? how do i start? i know that sodium is Na and that arsenate is AsO4^3-

*November 2, 2011*

**chemistry ASAP**

i ran into a problem that is tin(IV)dichromate i thought the answer was SN2(Cr2O7)4 but the book says the answer is SN(Cr2O7)2 CAN YOU PLEASE EXPLAIN WHY??

*November 2, 2011*

**chemistry ASAP**

can anybody please explain nomenclature to me ? how to name? for example: Na3PO3 NH4CLO2 AuNO2

*November 2, 2011*

**chemistry**

can anybody please explain nomenclature to me ? how to name? for example: Na3PO3 NH4CLO2 AuNO2

*November 2, 2011*

**physics**

A project is fire at angale of 45 with x-axis with the K.E 100J what is its K.E energy at maximum height?

*September 25, 2011*

**Pre-Agbra**

never mind

*September 13, 2011*

**chemistry**

Write "oxidation" before the reaction below which is anoxidation reaction; write "reduction" before the reaction belowwhich is a reduction reaction. a.____________________ Na----> Na+ (small+) + e- b.____________________ Cl + e- ----> Cl- What does it...

*August 25, 2011*

**Physics _ Please help**

25 kg of ice at 0° C is combined with 4 kg of steam at 100° C. What is the final equilibrium temperature in ° C of the system? (Lf = 3.33 x 105 J/kg; Lv 2.26 x 106 J/kg, specific heat capacity of water =4186 J/(kg.K)) Question 2 options: A) 40 B) 20 C) 60 D) 100 E) 8

*August 12, 2011*

**Math**

A spherical balloon is being inflated so that its volume is increasing at the rate of 200 cm3/min. At what rate is the radius increasing when the radius is 15 cm.

*July 31, 2011*

**Chemistry**

:D thankyou very much for explaining it all, it seems i was treating the 0.2^1/2 as 0.2*0.5 (being half of one...so wrong!). To get 0.4472 though, 0.2 needs *2.236, it dawned to me as 2.24, bringing so3 to 62.4g after rounding. I promise to practice my algebra. I appreciate ...

*July 19, 2011*

**Chemistry**

I thought so2 would be 0.4, I didn't have so3 correct on my ice table. I get x as 0.485; 0.471(x-0.4)=(0.4)(0.2)^1/2 0.471x-0.1884=0.04 0.471x=0.2284 But x needs to be 1.18 for so3 to be 0.78M(1.18 - 0.4) to multiply with 80, am i missing something?

*July 19, 2011*

**Chemistry**

equilibrium constant for; so3 <----> so2 + 1/2o2 is found to be 0.471M^1/2 @ 600deg C after a quantity of sulfur trioxide is allowed to come to equilibrium in a 1L flask @ 600deg C, 0.2 mol oxygen was found to be present. What mass of sulfur trioxide was initially placed...

*July 19, 2011*

**Chemistry**

what is the proper name for (CH3)2CHCH(OH)CH3?

*June 27, 2011*

**Chemistry**

A certain headache relief tablet is composed of monoprotic acetylsalicylic acid(C9H8O4(s)) and an inert filler. A 4.00 g tablet was crushed and dissolved to make 40.0 mL of solution. The solution was then titrated with 0.900 mol/L NaOH(aq). The volume of NaOH(aq) needed to ...

*June 9, 2011*

**chemistry**

Help! The concentration of a solution of hydrochloric acid is 1•00 ± 0•05 mol dm−3 and the volume is 10•0 ± 0•1 cm3. Calculate the number of moles and state the absolute uncertainty.

*June 1, 2011*

**trig**

Ok, so im brand new at trigonometry. If i have a right triangle with an acute angle of 30° an opposite side of 4 and a hypotenuse of x how do ii find x

*May 30, 2011*

**calculus**

The tangent to y = (ax)+b/(sqrt x) at x =1 is 2x-y=1. Find a and b. help?

*May 27, 2011*

**advanced algebra**

That is supposed to be 1/x sorry!

*May 21, 2011*

**advanced algebra**

How would i go about solving this complex fraction? [(x/3)-4] / [5+(1x)]

*May 21, 2011*

**math**

the number blank thirds is between 3 and 4. what could the numerator of this number be? explain your answer.

*May 9, 2011*

**economic**

supposes that a borrower and a lender agree on the nominal interest rate to be paid on a loan. Then inflation turns out to be higher than they both expected. Using a method similar to the GDP deflator, compute the percentage change of the overall price level. Also use 2009 as ...

*April 25, 2011*

**economic**

supposes that a borrower and a lender agree on the nominal interest rate to be paid on a loan. Then inflation turns out to be higher than they both expectedInflation during the 1970s was much higher than most people had expected when the decade began.How did this affect ...

*April 25, 2011*

**economic**

supposes that a borrower and a lender agree on the nominal interest rate to be paid on a loan. Then inflation turns out to be higher than they both expected.

*April 25, 2011*

**Speechwriting**

Hiya! Okay how can I introduce a speech without saying Goodmorning ladies and gentlemen? But not seem rude?

*April 24, 2011*

**Social Studies**

My pleasure

*April 24, 2011*

**Algebra**

I should just stop using this site... No one ever wants to help me anyways...

*April 20, 2011*

**Algebra**

I dont even know where to start with this problem... i'm supposed to simplify it but i dont get how, please help! 12e^x / e^4x I would really appreciate the help, thank you!

*April 20, 2011*

**Algebra**

ok i need help simplifying this problem. please :) 5e^x/6e it looks similar to this 5e^x ____ 6e Thanks!

*April 20, 2011*

**statistics**

At a church bazzar they have a game of chance that consists of picking a two digit number(0-9).You can bet 1$ by picking a two digit number if you match two numbers you win 25$ if you match one the numbers in the same order you win 3$ if you bet 24 and 42 comes up you lose,but...

*April 19, 2011*

**Algebra**

OK THANKS!

*April 10, 2011*

**Algebra**

Thanks. What does that symbol mean? and how do i write it?

*April 10, 2011*

**Algebra**

Perform the indicated operation and state the domain. Let f(x)=x-1 and g(x)=x+1 f(x) - g(x) Heres my work (x-1) - (x+1) x-x=0 and -1-1=-2 Answer =-2 because the x's cancel each other out. How do i find the domain when there is no x in the answer?

*April 10, 2011*

**physics**

hkgfffc

*April 6, 2011*

**algebra**

use the Substitution Method. Please give it a try. y = 3x + 4 5x + 3y = 12 Why is the substitution method preferred in this case?

*April 5, 2011*

**chemistry**

0.03125M

*March 30, 2011*

**Physics**

100.32

*March 29, 2011*

**physics**

what is the prarticle diagram for the thermite reaction?

*March 27, 2011*

**math**

how do you solve: -3y=3x-9 and 2x-4y=12 and -3x=2y

*March 15, 2011*

**math**

wow thanks rieny :)

*March 7, 2011*

**math**

rieny that doesent make sense it cant be.

*March 7, 2011*

**math**

im in grade 4 i dont know what that is

*March 7, 2011*

**math**

the floor of a room is a rectangle. it has a perimeter of 22m and an area of 24 square meters. what are the length and width of the room?

*March 7, 2011*

**physics**

Speedometer readings are obtained and graphed below as a car comes to a stop along a straight-line path. How far does the car move between t = 0 and t = 14 s?

*February 22, 2011*

**AM I RIGHT?**

Ok i have done some more reading, and i get the feeling it was bad. Because it isolated the people from the rest of the Eastern EMpire? But i have to write an entire essay on this topic? what else can i say?

*February 13, 2011*

**World History**

There's too much information, my brain cant process it all. But i get the feeling it was good??

*February 13, 2011*

**World History**

What influence did the Mongol's Golden Horde have on the development of the Russian Empire? (Good or Bad?)

*February 13, 2011*

**World History**

Yes it does have to do with the Byzantine Empire because thats what we are studying right now...

*February 13, 2011*

**World History**

Well if you look at its geographical location does it seem like a lot of people would come there? (this is why i posted this Q, it doesnt make sense)

*February 13, 2011*

**World History**

Why is there such a wide diversity of people in Eastern Europe? What are some of the origins of these diverse groups?

*February 13, 2011*

**math**

slope = (y2-y1)/(x2-x1)=(8-0)/(-2+2) =8/0= infinity

*February 12, 2011*

**Calculus BC**

Find the volume if the region enclosing y=2x, y=0, x=3 is rotated a)about the y-axis b)about the line x=3 c)about the line x=4.

*February 12, 2011*

**geometry**

given: chord AB is parallel to chord CD prove if two chords of a circle are parallel, the two arcs between the chords are congruent. Prove: arc AC is congruent to arc BD

*February 7, 2011*

**banyan elementary**

Samantha has 7 tomato plants in 12 rows. How many tomato plants does she have? Solve using multiplication equations

*January 19, 2011*

**math**

i'm sorry i left out one part. "A rectangle is 4 times as long as it is wide. A 2nd rectangle is 5 centimeters longer and 2 centimeters wider than the first. The area of the second rectangle is 530 square centimeters greater than the first. What are the dimensions of ...

*January 13, 2011*

**math**

A rectangle is 4 times as long as it is wide. A 2nd rectangle is 5centimeters longer and 2 centimeters wider than the first. what are the dimensions of the original rectangle?

*January 13, 2011*

**math**

i have no idea how to do this...

*January 13, 2011*

**reading**

What is the Antonym for the word RECIPE?

*January 12, 2011*

**dressmaking**

there are mistakes in those answers, I just did this test. here the correct answers 1. B (reference for study book 042014 PAGES 34, 35) 5. C (reference for study book 042014 PAGES 25-27)

*January 12, 2011*

**math**

rectangle A has length 12 cm and width 6 cm and while rectangle B has llength 8 cm and width 5 cm .find the ratio of the size of and angle of A to the size of an angle of B

*January 7, 2011*

**Physics**

How much time is needed for 5.0 N force to increase the speed of a 0.248 kg object from 12 m/s to 56 m/s?

*January 6, 2011*

**Physics**

How much force is needed to make a 1,400 kg car moving at 35 m/s come to a stop in 5.2s?

*January 6, 2011*

**Physics**

How much force is needed to make a 1,400 kg car moving at 35 m/s come to a stop in 5.2s?

*January 6, 2011*