Friday

October 9, 2015
Total # Posts: 355

**Tips**

Any ideas on how to get good grades on a test when your sick?
*February 24, 2013*

**health**

c is the best answer
*February 14, 2013*

**Social studies **

Conquest in the americas. How might the history of europeans in the americas be different if the indians had not been killed by european diseases???
*January 29, 2013*

**Social studies**

Ohhh thank you
*January 28, 2013*

**Social studies**

Europeans unknowlingly carried diseases such as smallbox measles and influenza to which native americans had no immunity. Can you please tell me the significance of the word immunity???
*January 28, 2013*

**Chemistry help**

Write a descriptive text and a word equation on how silicon is extracted from earth's crust' .
*January 26, 2013*

**science**

Suppose you put your lunch up on a shelf. Name two kinds of energy it has, and explain why. I think it would have potential energy because it has stored energy being off the ground, but what other energy?
*January 13, 2013*

**algebra**

how do you write an equation for a trend line?
*January 10, 2013*

**science**

why does the period of the pendulum decrease if the length of the pendulum decrease?
*January 8, 2013*

**maths**

h = 15 cm
*December 3, 2012*

**maths**

formula for volume frustum of a cone is: 1/3 π h (R² + Rr + r²) 1 liter = 1000 cubic cm 28.49 liters = 28490 cubic cm 1/3 π h (R² + Rr + r²) = 28490 Substitute values to get h and then find l by s = √((r1 - r2)2 + h2) then substitute l in ...
*December 3, 2012*

**7th grade math Ms. Sue please**

five is 20
*November 16, 2012*

**science**

50 ml of ZnSO4 solution was transferred to a mercury cathode and enough solid potassium nitrate is added to make the solution 0.1 M in KNO3. The electrolysis of Zn2+ is carried to completion of -1.3 V vs. SCE with the passage of 241 C of electricity. calculate the initial ...
*November 5, 2012*

**science**

50 ml of ZnSO4 solution was transferred to a mercury cathode and enough solid potassium nitrate is added to make the solution 0.1 M in KNO3. The electrolysis of Zn2+ is carried to completion of -1.3 V vs. SCE with the passage of 241 C of electricity. calculate the initial ...
*November 5, 2012*

**PLEEEESE HELP ME**

HELP!!
*November 2, 2012*

**MATH 9 HELP!!**

Justin wants to build a multi media room. 1/2 of the room will be for a home movie theater. 1/2 of the home theater will have comfy seats. The comfy seats will take up 24 m. 1. Draw the room and label all the areas 2. What are all the possible dimensions of the comfy seat area...
*November 2, 2012*

**can someone pleese help**

i really need help pleeese
*November 2, 2012*

**Math 9 pleese help**

Justin wants to build a multi media room. 1/2 of the room will be for a home movie theater. 1/2 of the home theater will have comfy seats. The comfy seats will take up 24 m. 1. Draw the room and label all the areas 2. What are all the possible dimensions of the comfy seat area...
*November 2, 2012*

**math**

Explain? which is more accurate: measuring to the nearest millimeter or to the nearest eighth of an inch
*October 21, 2012*

**algebra**

the atmospphere normally exerts a pressure of about 15 pounds per square inch on surfaces at sea level. about how much pressure does the atmosphere exert ona surface 30 square inches in area? would it be 2pounds
*October 3, 2012*

**4th grade math**

i dont now how to find the number didgt 4 and by 2
*September 19, 2012*

**Math**

There's a bowl full of candy bars. Mike takes1/3 of the candy bars but returns 4. John then takes 1/4 of what was left but returns 3 , and Henry took 1/2 of the remainder but returned 2. The bowl had 17 candy bars left. How many candy bars were originally in the bowl
*September 4, 2012*

**Health**

Underweight, healthy, overweight its c
*July 28, 2012*

**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*

**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*