Rain
Popular questions and responses by Rain
AP Chemistry
A 23.9475 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g). After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of
asked on September 19, 2017 
Math
Three friends drove radio controlled cars around a track. The table below shows the number of laps completed by each person and the time it took. Latoya Mary Melissa Number of laps 9 30 20 Time (minutes) 3 6 5 Write the number of laps completed per minute
asked on December 20, 2016 
Limit
Determine a region whose area is equal to the given limit. lim x> infinity Sigma (n on top, i=1 on bottom) (2/n)*[5+(2i/n)]^10 I started with delta x=ba/n =50/n =5/n The width of delta is 2/n so ba=2 I'm not sure how you got 50/n The integrand looks
asked on September 13, 2006 
Physics
Three charges (q1 = 8.7 nC, q2 = 7.2 nC, and q3 = 4.8 nC) are at the corners of a square of side a = 9.2 cm, as shown in the picture. Determine the magnitude of the resultant electric force on each charge.
asked on July 8, 2012 
Solid Geometry
Find the Lateral area in cm square of the following right pryramid. 1. Base is regular octagon of side 20cm and altitude of 20cm. 2. Base is regular hexagon of side 20cm and altitude of 30cm. 3. Base is regular hexagon of side 30cm and slant height of
asked on August 16, 2016 
Chemistry
Reaction 6 1. Place a piece of mossy zinc in a test tube 2 add hydrochloric acid solution to the test tube until the mossy zinc is completely covered What gas was released in reaction 6 and how could you test the gas to confirm its identity?
asked on May 20, 2015 
math
Stephen drove at a constant speed from Town X to Y at 9 A.M.yesterday. Half an hour later Cole drove from Town X to Y at A constant speed that was 30 km/h faster than Stephens. By 9:30 A.m, Stephanie had already traveled 40 km. Cole caught up with Stephen
asked on October 24, 2013 
Geometry
Find the possiable measures for line segmant xy in triangle xyz if xz is 6 and yz is six. Im really confused if you could explain this i would really appericate it! Thanks!
asked on November 10, 2009 
Calculus
f(x)=x^2  5x +7 and g(x) 3/x 1) Indicate points of intersection 2) compute the area enclosed by the graphs of f(x) and g(x). 1) (1, 3) , (3, 1) 2)Area = âˆ« [1 to 3] [(3/x)  (x^2  5x + 7)] dx = [3 ln x  (1/3)x^3 + (5/2)x^2  7x = 3 ln 3  8/3 am i
asked on September 26, 2006 
Mathematics
In a right rectangular pyramid with base edges a=18 cm and b=10 cm the slant height towards a is k=13 cm while the slant height towards b is l=15 cm. Find: The surface area of the pyramid
asked on June 1, 2020 
Physics
Imagine two billiard balls on a pool table. Ball A has a mass of 7 kilograms and ball B has a mass of 2 kilograms. The initial velocity of the ball A is 6 meters per second to the right, and the initial velocity of the ball B is 12 meters per second to the
asked on January 21, 2020 
History
1. Which of the following describes an accomplishment of Georgia’s royal governors? A. Declared the Catholic church the official church of Georgia B. Established the colonies first court system the court of Confuciu established the colonies first court
asked on September 26, 2019 
Chemistry
0.25 mol dm3 solution of hydrochloric acid?
asked on March 29, 2017 
help math
1.Write the ratio in the simplest form 16:24 1:2 4:3*** 3:4 2:3 2.Solve the following proportion p/6 =7/8 p=5.25*** p=8 p10.5 p=42 3.James has a model helicopter. The model is 8 inches long and 7 inches wide. The actual helicopter is 56 inches long. What
asked on December 22, 2016 
History PLEASE HELP
How did the supreme court decision in Worcester v Georgia and the Indian Removal Act lead to the removal and resettlement of native American groups? please help me with this all i want is help getting started or a sample essay
asked on December 21, 2016 
physics
A car drives straight down toward the bottom of a valley and up the other side on a road whose bottom has a radius of curvature of 115 m. At the very bottom, the normal force on the driver is twice his weight. At what speed was the car traveling? I have
asked on March 28, 2016 
Computer Science/Pseudo Code Python
Hi, I'm confused about an assignment. I'm not sure what to do and would like some help. An example: Write a program that obtains two integer numbers from the user. It will print out the sum of those numbers. Pseudo code: Prompt user to enter first integer
asked on February 28, 2016 
math
the length of a rectangle is 8 cm more than its width. If the length is decreased by 9 and the width is tripled, the area is increased by 50%. What was the area of the original rectangle?
asked on January 30, 2016 
Chemistry check
H2O2+MnO2 > MnO2 + H2O Is my work correct?
asked on May 25, 2015 
Prob and Stats
For questions 1 5 use confidence intervals to test the hypothesis. 1) A light bulb producing company states that its lights will last an average of 1200 hours with a standard deviation of 200 hours. A sample of 100 light bulbs from the company were tested
asked on May 21, 2015 
Please help science
A scientist observes that termites are fed a certain antibiotic die a starvation after a few days. The scientist also notices that certain protists that live inside the termites guy are affected by the antibiotic in a peculiar way: although the protists
asked on October 7, 2014 
Science urgent help
A scientist observes that termites are fed a certain antibiotic die a starvation after a few days. The scientist also notices that certain protists that live inside the termites guy are affected by the antibiotic in a peculiar way: although the protists
asked on October 7, 2014 
Math 3 quick questions
Factor: A.). 4(3x+1)^2 5(3x+1) +1 B.) 5(23x)^2 28(23x)+15 C.) 2(3a4)^2  (3a4)(a+2)6(a+2)^2
asked on October 2, 2014 
To : bobpursley
Please could you help me on my question:)
asked on October 1, 2014 
Science urgent help please:)
Compare the forms of locomotion used by the 4 phyla of animal like protists? Describe the process of conjunction . Is conjunction a form of reproduction? Explain In what ways are animal like protists helpful to other living things?
asked on October 1, 2014 
biology, genetics
Suppose that r, red, and sc, scarlet, are two recessive eyecolor mutations that lie 20 map units apart on the Drosophila X chromosome, and that each causes a red eye color in place of the wild type purple color. A. If a female from purebreeding rr stock
asked on February 21, 2014 
Math
This year, the sum of Mr. Bellini's age and his son's age is 38 years. 4 years ago, Mr. Bellini was 5 times as old as his son. How old is his son this year? How old is Mr. Bellini this year?
asked on October 10, 2013 
Physics
A thin rod L = 9.0 cm long is uniformly charged and has a total charge of 4.4 nC. Find the magnitude of the electric field at a point P located at a distance R = 13.5 cm from the center of the rod when: (a) The point P lies along the axis of the rod
asked on July 9, 2012 
Science
I need some answers for my science essay... We have a research report and I cannot find these answers ANYWHERE. The sport I chose for the assignment was Quidditch (awesome, right?) and I cannot find work for a bludger, quaffle, golden snitch, or players. I
asked on May 26, 2011 
Business Communications
Which of the following selections contains a runon? If none of the selections contains a runon, select "Correct." A. Everyone praised Matthew for his will power. B. He quit smoking five years ago, he still craves a cigarette from time to time. C.
asked on July 7, 2010 
Spanish
Im confused about the directions on my hw. I cant really figure out what im supposed to do. This is what it says Las siguientes personas quiseron hacer varias cosas el sabado pasado. En lugar de eso, tuvieron que hacer cosas diferentes. Expresa eso. The
asked on January 10, 2010 
Basic Algebra
Im having a stupid moment and i cant figure this out x1 x2  + = 1 2 3 assume the  is a division bar
asked on November 12, 2009 
spanish
How do you say 'he is allergic to' in spanish? I think it would be something like this: el esta' (hower you say allergic to)los flores, but im not sure
asked on November 4, 2009 
spanish
How do you say behind in spanish?
asked on November 4, 2009 
geometry
Whats the midpiont formula? I am totally blanking and i need it asap
asked on September 17, 2009 
law studies
what idea is fundamental to the contemporary concept of criminal justice
asked on September 9, 2009 
English
title of AIDS on research paper
asked on May 15, 2008 
social science
Please could you help me with understanding how the boundaries and links between states of past culture have changed. Thanks This is a very broad question. First, you must define what you mean about the word "past".Does the thinking behind this question
asked on July 25, 2007 
science
I need to produce a related structure of the molecular features of carboxyli acid, size hydrocarbon group on ester and distance between oxygeeb atom joined to the ring and oh group of the carboxylic acid? I have got no ideas on where to start. Start by
asked on July 13, 2007 
Calculus
could anybody please explain how sec x tan x  ¡ì sec x tan^2(x) dx = sec x tan x + ¡ì sec x dx  ¡ì sec^3(x) dx What I don't understand about your question is what is ¡ì ? i just want to know if those two equations are equal, if yes, how did one
asked on October 16, 2006 
Calculus problem
Evaulate: integral 3x (sinx/cos^4x) dx I think it's sec3 x , but that from using a piece of software, so you'll have to verify that. Using uppercase 's' for the integral sign we have S 3sin(x)/cos4dx or S cos4(x)*3sin(x)dx If you let u = cos(x) then du =
asked on October 16, 2006 
Calculus problem
I really need help on this question. A goldsmith makes a wedding band by taking a gold ball and drilling a wide hole through it. The wedding band has to be 1 cm wide and the hole has to have a diameter of 2 cm. Given that gold weighs 19.32g/cm^3, how heavy
asked on October 10, 2006 
Polar coordinates
I need some help on this Calculus question about polar coordinates. Consider a pasture bordering on a straight river. At 2m from the river, a goat is tied to a pole with a 4m long rope. What is the area of grass that the goat can graze? There are a couple
asked on September 26, 2006 
Math
a) Is âˆ«[1 to 1]e^x^3 dx positive, negative, or zero? Explain. I think is positive but i don't know how to explain it. b) Explain why 0 < âˆ«[0 to 1] e^x^2 dx
asked on September 10, 2006

science
Lun you are awesome!
posted on February 12, 2020 
History
Ms. Sue I think so but I need a 100 so I want to check
posted on September 26, 2019 
history
1. Which of the following describes an accomplishment of Georgia’s royal governors? A. Declared the Catholic church the official church of Georgia B. Established the colonies first court system the court of Confuciu established the colonies first court
posted on September 26, 2019 
Trigonometry
RPC stands for rectangular coordinate plane
posted on August 1, 2019 
math
Ok Anna Banana, not trying to be rude boy how else would you get here? You obviously searched up this question to get here so I are cheating.
posted on June 4, 2019 
chemistry
.105 M
posted on March 28, 2019 
Ed. Tech
Does anyone know what test these answers go to?
posted on August 15, 2018 
5th grade
thx justian for the help
posted on February 22, 2018 
Social Studies CHECK ANSWERS
The answers are correct, except for 5. Which is C
posted on November 27, 2017 
AP Chemistry
Thank you!!!
posted on September 19, 2017 
Math
24. Is so wrong it hurts.
posted on August 29, 2017 
Math
How did you get these answers
posted on August 27, 2017 
Math
9/3Latoya 30/6Mary 20/5Melissa
posted on December 20, 2016 
physics
29.0419194
posted on December 8, 2016 
physics
p=
posted on September 29, 2016 
Chemistry
thank u so much :)
posted on May 21, 2015 
Math 3 quick questions
Oh ok thanks:)
posted on October 2, 2014 
physics
The answer is 180
posted on October 29, 2013 
Physics
yes, it is
posted on August 30, 2013 
math
an angle has a measure of (5x+7) and another angel has a measure of (2x+54) together they form a linear pair find the smallest angle
posted on April 4, 2013 
writing skills
I had the same question on a test, I also chose A and it was wrong.
posted on November 20, 2012 
Physics
Never mind Elena, when I wrote it out on paper it made sense. Thank you very much! :)
posted on July 8, 2012 
Physics
Order, clockwise q1, q2, q3.... Could you explain the procedure in words?
posted on July 8, 2012 
Science
tHANKS
posted on June 2, 2011 
Science
please help! I need work done, so distance and speed for anything quidditch!
posted on May 26, 2011 
Business Communications
Ah! Okay then! I see what you mean now. Thank you so much for making that clear. I was confused for a bit there. XP Thank you so very much!
posted on July 7, 2010 
simple equations ( math)
216*1.6 sorry don't have a calc but that will give u the answer
posted on January 10, 2010 
Spanish
think i figured it out now thanks to everyone who tried i appericate it :)!
posted on January 10, 2010 
Math
this is imposible uless it is a right triuabgle. You need to knw the height. formula is: b*h A=  2
posted on January 10, 2010 
english
i copyed the responce and made teth edits in (). The book "We are all welcome here” by Elizabeth Berg relates to the time era of Elvis Presley and his home town. The narrator and the protagonist of the book is a 14 year old girl named Dianna Dunn. In my
posted on January 10, 2010 
math
ur deviding by 7 so the sign would be flipped to < and it would be 5
posted on November 12, 2009 
Basic Algebra
Thanks a bunch!
posted on November 12, 2009 
6th grade
12 grams or 12x the variable g
posted on November 12, 2009 
History quick ?
I would go with 24 but im not really sure ekkk
posted on November 12, 2009 
Civics
Cost the upfont cost of building, for example, a subway would be extremely high and most cities would not be able to affford it even if it was eventually paid up. the debt would be too high
posted on November 12, 2009 
science
because helium has a lower density the oxygen ie the molecules weigh less in helium
posted on November 10, 2009 
Physics Gr11 Light Unit  Blind spot
This may be wrong i havent taken phisics yet, but it makes some sense because a blind spot is relativelly small it would be difficult to completely lose sight of an object because of the size difference, and also a persons eyes are constantly moving. For
posted on November 10, 2009 
math
it sounds like a font end estimation would be more exact bc depending on which digit ur rounding to the answer could be uber off
posted on November 10, 2009 
5th grade Math
1 its 7 2 its 12 this is bc they are the greatest #s that can go into the two origional #s if that makes any sense
posted on November 4, 2009 
substitution method
2x+(x7)=8 you have to substite the equation for y into the problem
posted on November 4, 2009 
Algebra
2 maybe?
posted on November 4, 2009 
Mathmatics
you really shouldnt just post every question on your hw sheet...
posted on November 4, 2009 
spanish
figured it out its atra's de
posted on November 4, 2009 
Math
i would get a calculator.... i got 6(+or ) 5.291502622
posted on November 4, 2009 
Math
In the question you are dealing with a 1/2 probability rate, so in ait wouls be 2 of the 1/2 rates which is 25% bit would be the same b/c its still two 1/2 senerios, so 25% again csame thing 25% dthis is a 75% chance b/c the secod child is still an
posted on November 4, 2009 
Math
Pb is 1/4 of Pa if that helps, but i don't really understand what you or maybe the question is asking
posted on November 4, 2009 
Mathmatics
does this help at all?
posted on November 4, 2009 
us history
minunite men in the revolutionary war or a malitia
posted on November 4, 2009 
Mathmatics
what do you mean? that's hard to fallow...
posted on November 4, 2009 
Mathmatics
again... 7x=4x+21 subtract 3x=21 divide x=7
posted on November 4, 2009 
Math.
10/x+x=7 multiply times 10 x+x=70 add the xs 2x=70 divide x=35 i think... its been a while
posted on November 4, 2009 
Math.
the straight line is a division sign one sec and ill figure out how to solve it
posted on November 4, 2009 
Mathmatics
Here are the steps: 5x14
posted on November 4, 2009 
geometry
angle addition postulate is there is an angle that is divided u take the measurements of the two angles that are created and add them together
posted on September 17, 2009 
geometry
slope= y= mx+b midpoint= (Y1Y2/2), (X2X1)/2
posted on September 17, 2009