Homework Help: 3rd Grade

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math
write an expression for jessica who sits in the 4th row 3rd seat. Each row has 6 seats only four rows.
Monday, March 7, 2011 at 4:35pm

8th grade math
the first side of a triangle measures 3 cm longer then the second side the third side is 4cm shorter then twice the second side the perimeter is 31cm. how long is each side?
Monday, March 7, 2011 at 4:15pm

7th grade math
A group of 32 students went to the amusement park.All of them either rode the Ferris wheel or Roller coaster.Seventeen rode the Ferris wheel,23 rode the roller coaster,and 8 did both.How many rode only the Ferris wheel
Monday, March 7, 2011 at 3:23pm

Calculus 12th grade (double check my work please)
1.) which of the following represents dy/dx when y=e^-2x Sec(3x)? A.3e^-2x sec(3x) tan (3x)-2e^-2x Sec(3x)<<<< my choice B.)3e^-2x sec(3x)tan (3x)-2xe^-2x sec(3x) C.)3e^-2x sec(3x)tan (x)-2e^-2x Sec(3x) D.)3e^-2x sec(3x)tan (x)-2xe^-2x sec(3x) 2.)calculate dy/dx if...
Monday, March 7, 2011 at 6:39am

Math
An instructor gives regular 20-point quizzes and 100-point exams in a mathematics course. Average scores for six students, given as ordered pairs (x,y) where x is the average quiz score and y is the average test score, are (18, 87), (10, 55), (19, 96), (16, 79), (13, 76), and...
Monday, March 7, 2011 at 1:47am

3rd grade writing Math
Mina says that if you know the products up to 10x10, you also know the division facts up to a dividend of 100. Is she right? Explain.
Monday, March 7, 2011 at 12:43am

Math
There are 256 students in this outstanding 7th grade class. How many scoops of ice cream would have to be used in each cone in order to make a different cone for each person?
Sunday, March 6, 2011 at 4:45pm

Calculus 12th grade (double check my work please)
2- given the curve is described by the equation r=3cos ¥è, find the angle that the tangent line makes with the radius vector when ¥è=120¨¬. A. 30¨¬ B. 45¨¬ C. 60¨¬ D. 90¨¬ not sure A or D 2.) which of the following ...
Sunday, March 6, 2011 at 1:08am

Calculus 12th grade (double check my work please)
1.)Find dy/dx when y= Ln (sinh 2x) my answer >> 2coth 2x. 2.)Find dy/dx when sinh 3y=cos 2x A.-2 sin 2x B.-2 sin 2x / sinh 3y C.-2/3tan (2x/3y) D.-2sin2x / 3 cosh 3yz...>> my answer. 2).Find the derivative of y=cos(x^2) with respect to x. A.-sin (2x) B.-2x sin (x^2...
Sunday, March 6, 2011 at 12:38am

Calculus 12th grade.
1. A body is moving along a straight line with a velocity which varies according to the equation v=9t^2+2t, where v is in feet per second and t is in seconds. Find the expression for the distance as a function of time. A. 3t^3+t^2+C B. 3t^3+2t^2+C C. 18t+C D. 20t+C My answer ...
Saturday, March 5, 2011 at 10:04pm

Calculus 12th grade.
Find the area lying above the x axis and below the parabolic curve y= 4x -x^2 a.8 b. 8 1/3 c. 10 2/3 d. 16 B or C not sure??
Saturday, March 5, 2011 at 9:44pm

computers
I am going to become a tutor for kids grade K-3.I am tutoring Math, Writing, and Reading. Do you know any good websites that contain free printable worksheets?
Saturday, March 5, 2011 at 8:30pm

Grade 10 Math
Write an equation that forms a system of equations with x + y = 4, so that the system has: a) No solution b) Infinitely many solutions c) One solution I know how to figure out if two linear systems have a solution, but I don't understand how you could figure out if just ...
Saturday, March 5, 2011 at 1:55pm

science
can you give me a website on electric field?
Friday, March 4, 2011 at 2:02pm

French HELP
I have to write a postcard in French. Im in grade 10, so my vocab isn't really up there. I have to include the date, tell where I am, and what celebration it is and how I like it. I have to describe the people I am with - Use adjectives. And report on the weather. I have ...
Friday, March 4, 2011 at 10:44am

12th grade Trigonometry
Solve this trigonometric equation.give all positive values of the angle between 0deg and 360deg that will satisfy. Give any approximate value to the nearest minute only. 3 sin theta - 4 cos theta = 2
Friday, March 4, 2011 at 6:31am

5th grade math
I need help with this problem ! 5 2/5 - 3 4/5= ? 6 1/10 - 3 4/10 = 10 - 4 2/5= ? PLEASE! SHOW ME EACH PROBLEM STEP BY STEP SO , I CAN FINISH MY HOMEWORK! THANK YOU!
Thursday, March 3, 2011 at 9:37pm

8th grade math
The following pattern continues indefinitely. REPEATREPEATREPEAT… 1) What is the 38th letter in the pattern? Explain your answer. 2) What is the 40th letter in the pattern? Explain your answer. 3) What is the 604th letter in the pattern? Explain your answer.
Thursday, March 3, 2011 at 3:51pm

U.S.History- 8th grade
Could someone help me with this question? Which of the following groups of workers lived in poverty? nurses unskilled workes technicians immigrants I'm torn between unskilled workers and immigrants
Thursday, March 3, 2011 at 10:48am

6th grade Math
9 + 5k = 45 + 2K the sample shows operation S9 to come up with 5K=36+2k assuming subtract 9 from the 45 sample shows K=12 how did they come up with that?
Wednesday, March 2, 2011 at 8:33pm

math
Girls are one-half of the fifth grade class.Two-tenths of these girls have red hair.Red haired girls are what fraction of the fifth grade class?
Wednesday, March 2, 2011 at 7:54pm

5th grade math
use inverse operations and a property of equaility to solve the equations. x+13=42 x-12=37
Wednesday, March 2, 2011 at 5:47pm

5th grade math
get each variable by itself on one side of the equation. x-45=90 n+23.4=36.9
Wednesday, March 2, 2011 at 5:44pm

math 5TH GRADE
does the pentagon shape right angle
Wednesday, March 2, 2011 at 4:35pm

7th grade math
Each person has taken four tests and has one more test to take.Find the score that each person must make to change the mean or median as shown Barry has scores of 93,84,86,and75.He wants to raise the mean to 86
Wednesday, March 2, 2011 at 3:09pm

Spanish-7th grade-Please help
I'm not sure what this is asking or how to answer it- ¿Qué prefiere llevar tu mamá? Is it asking what I prefer to take my mom? And how do I answer it? I'm really confused on the transalation Please give advice
Wednesday, March 2, 2011 at 11:57am

12th grade chemistry
How many molecules of water can be made from 9.21 x 10^22 molecules of hydrogen sulfate? The equation is 2Fe(OH)3 + 3H2SO4 -> Fe2(SO4)3 + 6H2O
Wednesday, March 2, 2011 at 12:04am

Spanish-7th grade-Please check my answers
Could someone check these please?I had place a possessive adjective in place of el 1. El hermano de Juan y Pedro se llama Bret Answer: Su hermano se llama Bret 2.Replace los with possessive Los hermanos de Paco y Linda se llama Santiago y Jose Answer: Sus hermanos se llaman ...
Tuesday, March 1, 2011 at 12:34pm

grade 4 math
Several friends are taking turns flying akite. Each friend flies the kite for the same amount of time.They spend 6 hours flying the kite altogether. Explain whatinformation you need to find how long each friend flew thekite for.
Monday, February 28, 2011 at 8:17pm

3rd grade math
carl put his coins on pages in a book. He has 22 coins. He can put 4 coins on each page. How many coins would Carl put on the 6th page? Explain?
Monday, February 28, 2011 at 8:10pm

8th grade science
What is the difference between speed and velocity?
Monday, February 28, 2011 at 7:59pm

8th Grade Science
I have to do a project and I have to have 9 or more physial and chemical properties of colloids and suspensions. I am soo stuck!!! Help!! Thanks!
Monday, February 28, 2011 at 7:15pm

Math
Hey I need some help in 6th grade geometry. I need to find some random facts about the Metric system and the Coustomary system so that I can create a double bouble map on them. Not only did I need facts on them sepratley I also need facts on what they have in common.
Monday, February 28, 2011 at 4:21pm

Stats
the final grade averages from a fictional graduate statistics class are uniformly distributed between 66 and 96. what is the probability that a student selected at random will have a final average of between 90 and 100?
Monday, February 28, 2011 at 11:52am

Science
Hello, My dughter is in 6th grade and has a science experiment that she is working on. It is to take a shoebox and do a "leprechaun trap" showing a Newton's law. She is struggling. Some kids are already done and she is drawing a blank. She built a living room ...
Monday, February 28, 2011 at 11:26am

statistics
Susan is taking Western Civilization this semester on a pass/fail basis. The department teaching the course has a history of passing 77% of the students in Western Civilization each term. Let represent the number of times a student takes Western Civilization until the first ...
Monday, February 28, 2011 at 6:40am

MATH grade 12
Determine the values of a M and N , so that the polynomial 2x^3+mx^2+nx-3 and X^3-3mx^2+2nx+4 are both divisible by x-2. I am so lost, i do not know how to start this problem! please help i have a test soon!
Sunday, February 27, 2011 at 8:20pm

biology grade 12
My teacher wants me to calculate the rate of enzyme activity (1/s) I'm given the temperatures: 0 , 15, 30, ,50, and 80 (degrees celsius) AND the times 8.74, 18.83, 14.30, 34.22, and infinity (seconds obviously, these are the times it took the enzyme to react) What am i ...
Sunday, February 27, 2011 at 5:45pm

12th grade, Advance Algebra
How to press the value of log, to evaluate log, to find the unknown log using EL-531WH, advance D.A.L
Sunday, February 27, 2011 at 6:48am

Geometric
1) The sum of last three terms of GP having n terms is 1024 time the sume of first 3 terms of GP. If 3rd term is 5. Find the last term. 2) The sum of the first eight terms of a GP is five times the sum of the first four terms. Find the common ratio.
Sunday, February 27, 2011 at 3:38am

algebra 2
Hi there, I feel so embarrassed that even after you give me the answer, i dont even know how to format it. I most definately need to learn this and quickly! if I expect to make my grade. I really apologize for my shortcomings. But, how is it that you write out the problem, is ...
Saturday, February 26, 2011 at 8:42pm

Unix Shell script
Shell script Using "if" statement checks for a file called "student.txt" in the current directory. Removes (deletes) the file if it exist. This file will collect last name, first name, and grade for 5 people. Use a while loop to get the information (last ...
Saturday, February 26, 2011 at 1:47pm

helth
i am in the 5th grade and need to know the function of heart and how to draw it
Saturday, February 26, 2011 at 12:17pm

Unix Script
"Using "if" statement checks for a file called "student.txt" in the current directory. Removes (deletes) the file if it exist. This file will collect last name, first name, and grade for 5 people. Use a while loop to get the information (last name, ...
Saturday, February 26, 2011 at 9:43am

Friction and Charge (Physics Pre-AP 11th Grade)
When a fuel truck is moving, the friction between the truck tires and the road causes charge to build up. This is an example of charging by conduction. a. Explain why the build up of charge is a hazard. b. What can be done to prevent the hazard that would otherwise be produced...
Friday, February 25, 2011 at 2:45pm

[+] (+) [-] PHYSICS PRE-AP 11th GRADE
A positively charged light metal ball is suspended between two oppositely charged metal plates on an insulating thread as shown below. After being charged once, the plates are disconnected from the battery. Describe the behavior of the ball. Could you please describe the ...
Friday, February 25, 2011 at 2:16pm

Force between Charged Spheres (Physics 11th Grade)
What is the force between two small charged spheres that have charges of 2 x 10^-7 and 3 x 10^-7 if the distance of r is 30 cm. I think you use Force = the constant of K multiplied by the product of the charges divided by the square of the distance again. If you plug in the ...
Friday, February 25, 2011 at 2:14pm

Force if Distance is Doubled (Physics 11th Grade)
Two like-charged balloons, placed at a distance of .5 meters, experience a repulsive force of .32 N. What is the force if the distance between the two balloons is doubled? If you use Coulomb's Law, the equation used to find .32 N was Force = the constant of K multiplied by...
Friday, February 25, 2011 at 2:11pm

Value of a Charge of a Body (Physics 11th Grade)
What is the value of a charge of a body that carries 20 excess electrons? I think that the question asks you to pretend that something is negatively charged by 20 electrons. So I think you take the charge of an electron, which is 1.6 x 10^-19, and multiply it by 20. If you do ...
Friday, February 25, 2011 at 2:09pm

Static Electricity. 11th Grade Pre-AP Physics
Hi everyone! I need some help studying for a test on Static Electricity. I have a few review questions that I don't know how to do. Below they are numbered and in parenthesis I answered what I think you might have to do to get the answer. Please help me in any way you can...
Friday, February 25, 2011 at 2:08pm

Science. 11th Grade Pre-AP Physics
A positively charged light metal ball is suspended between two oppositely charged metal plates on an insulating thread as shown below. After being charged once, the plates are disconnected from the battery. Describe the behavior of the ball. Thank you so much! Could you please...
Friday, February 25, 2011 at 1:12pm

5th grade math
yes ,i definetly did,more than once ,i just had trouble comprehending the way they try to explain it.thats why i asked to please get help showing several of both kinds of problems,some addition &some subtraction so i could try to understand how they where done.please help by ...
Friday, February 25, 2011 at 8:12am

MATH Grade 12
How do you sketch an equation like x+4=-2(y-3)^2 ???
Thursday, February 24, 2011 at 11:51pm

5th grade math
can you please explain &show me how to get these answers to common denominators,find the sum & difference,write in simplest form,7/10-3/5 =,2/3-1/6 =,5/6-7/12 =,5/12+1/4=,1/6+2/9=,5/8+1/2=,3/8+1/4= i'm really having a huge problem understanding this,it's getting late,i...
Thursday, February 24, 2011 at 11:49pm

algebra
from a base elevation of 9600 ft, a mountain peak in colorado rises to a summit elevation of 14,307 ft over the horizontal distance of 15,850 ft, what is the grade of the peak?
Thursday, February 24, 2011 at 11:01pm

math 5th grade
need to understand how to find the sum in simplest form of these common denominators 1/2 +1/10= ,5/12+1/4=,the difference in 2/3-1/6 =, 5/6-7/12=
Thursday, February 24, 2011 at 10:56pm

third grade hw help
Hello All, Please help my son with his Math fraction. He needs to put the below fractions in ordedr from least to greatest. 1) 2/4, 2/3, 2/7, 2/5 2) 1/2, 6/7, 5/7, 1/10 3) 1/2, 6/7, 1/12, 2/3, 11/12, 1/6, 1/3, 1/4, 4/5 Please help!!! Thanks.
Thursday, February 24, 2011 at 9:48pm

3rd grade math hw help!
Hell All, Please help my son with his Math fraction. He needs to put the below fractions in ordedr from least to greatest. 1) 2/4, 2/3, 2/7, 2/5 2) 1/2, 6/7, 5/7, 1/10 3) 1/2, 6/7, 1/12, 2/3, 11/12, 1/6, 1/3, 1/4, 4/5 Please help!!! Thanks.
Thursday, February 24, 2011 at 8:49pm

math 4th grade
each student brought in 9 cans to recycle. write an equation to represent the total number of cans (c)for any number of students(s)
Thursday, February 24, 2011 at 7:26pm

3rd grade math
How do yu draw an array for the number 88
Thursday, February 24, 2011 at 11:45am

12th grade English
arguments and counterarguments in "A Vindication of the Rights of Woman"
Thursday, February 24, 2011 at 11:20am

7th grade math/distributing property homework
I need help with the steps of one question: -8(n-2)+4(3-6n)= (-36). Trying to find out what 'n' is
Wednesday, February 23, 2011 at 6:33pm

7th grade math
The volume of a cube is 343 mm2. What is the length of one side of the cube?
Wednesday, February 23, 2011 at 6:01pm

Math grade 3
Identify the attributes of the shapes. Which attributes change according to a pattern?
Wednesday, February 23, 2011 at 5:25pm

3rd grade Math
There are 4 square units in a row of carpeting , and 3 rows in Daniel's finished basement. How many square units of carpeting does he need to cover it completely. Thank you!
Wednesday, February 23, 2011 at 2:17am

10th
i am just abt to finish my 10th grade,i am very weak at maths and science,hence i have opted to take economics. 1.is this the right choice? 2.is there goin to be maths in it? 3.what are the core subjects involved?
Wednesday, February 23, 2011 at 1:24am

8th grade math
Problem of the Week The Problems - Bull's Eye! 02/14/11 In the game of darts, players take turns throwing darts at a circular target like the one shown. The dartboard, as it is called, is typically affixed to a wall and consists of a series of concentric circles that form ...
Wednesday, February 23, 2011 at 12:44am

6th grade science
What are Newton's three laws on motion in sixth grade lingo?
Tuesday, February 22, 2011 at 9:47pm

4th grade math
Students are standing in a circle evenly spaced and numbered in order. The 3rd student is directtly opposite the 7th. How many students are in the circle?
Tuesday, February 22, 2011 at 7:29pm

grade 5 mathematics
if 15 muskrat pelts has the same value as one beaver pelt how many muskrat pelts have the same value as 25 beaver pelts. please help.
Tuesday, February 22, 2011 at 7:02pm

4th grade math
Two rectangles are each 5 in. wide. The larger rectangle has an area of 35 sq in . and is 2 in longer than the smaller rectangle. What is the area of the smaller rectangle?
Tuesday, February 22, 2011 at 5:54pm

Math
What does I=prt mean in 7th grade verison?
Tuesday, February 22, 2011 at 5:31pm

Spanish-8th grade-Totally confused
Could someone please help me-I'm totally confused on this. I have to say that the person has his/her/their own book or books in the following sentences 1.Yo tengo libro. 2.Ella tiene libros 3.Ellos tienen libro 4.Nosotros tenemos libro For 1, would I put mi 2. sus 3. don&#...
Tuesday, February 22, 2011 at 12:20pm

English
I really need you to check my corrections. Thank you very much. 1) The town is described through the use (using, are both possible?)of similes taken from the animal world. 2) The black smoke coming out of the chimneys is compared to (not: is seen as) a snake whereas the piston...
Tuesday, February 22, 2011 at 11:35am

algebra
The final grade for a particular course is calculated by dividing total points earned by total points available. There are 120 points available in the first half of the course, and 140 points in the second half of the course. If a student earns 81% in the first half ofthe ...
Tuesday, February 22, 2011 at 7:19am

Math Trivia
1) A school has 1-- closed lockers. Larry comes into the school and "toggles" every second locker, then Fred toggles every 3rd, Bob every 4th, etc, up to Zoe who toggles every 100th locker. After all this"toggling" how many lockers are open? 2) If you take ...
Monday, February 21, 2011 at 9:44pm

Chemistry-help needed
Can we use an ACS/AR grade chemical for UV spectrophotometric analysis? Or is it a must to use a chemical that is specially designated (SpectrAR grade) for UV analysis?
Monday, February 21, 2011 at 5:15pm

Geometry-7th grade
The diagonals of a rhombus ABCD intersect at point E. If the sides of BC is equal to x + 9 and side DC is equal to 5x-2, find x. How would I set this up-Please give me some direction
Monday, February 21, 2011 at 1:37pm

7th grade math
Find the missing dimension for the three dimensional figure to the nearest tenth, given the volume and other dimensions L= 8m W=4.6m V=88mcubed
Sunday, February 20, 2011 at 10:43pm

8th grade science
answer yes or no to weight, velocity,speed,& mass. 2 identical planes taveling @ 300 km/hr in opposite directions both have the same: weight-yes, velocity-no, speed-yes, mass-yes. velocity is a no, correct?
Sunday, February 20, 2011 at 3:38pm

6th grade english
Can you recommend a site where I can get some examples of prepositional prases?
Sunday, February 20, 2011 at 1:56pm

9th grade math
the triange is 31cm, side 1 and side 2 have equal lenghts, while side 3 is one centimeter shorter than twice then length of side 1, how long is each side?
Friday, February 18, 2011 at 11:12pm

grade 2
what is he probilty of rolling a dice and get a 5 if you rol it 5 time
Friday, February 18, 2011 at 8:23pm

8th Grade Algebra
Tim and Sasha have a bag containing 7 red marbles, 3 blue marbles, 6 white marbles, and 4 yellow marbles. Tim reaches in, without looking, pulls out a marble, records the color, and then puts the marble back.Sasha then does the same thing. What is the probability that Tim and ...
Friday, February 18, 2011 at 3:44pm

8th grade science
What leaves after a disturbance in the climax community?
Friday, February 18, 2011 at 2:21pm

Mathematics, physical, science agricultural science, life science english
What it means to be a grade 12 learner?
Friday, February 18, 2011 at 8:36am

10th Grade Chemistry
I am having real trouble remembering how you can tell if a molecule is polar? Which of the following molecules is polar? NCl3, NO2, H2S, or SiH4
Thursday, February 17, 2011 at 9:57pm

10th Grade Chemistry
Which of the following molecules is polar? NCl3, NO2, H2S, or SiH4
Thursday, February 17, 2011 at 9:50pm

8th grade math
-7x+7y=7 2x-2=-18 how many solutions does this system have ?
Thursday, February 17, 2011 at 9:48pm

7th grade science
I keep asking ...Ms.Sue, could you possibly help? Can flying fish communicate and how?
Thursday, February 17, 2011 at 8:41pm

8th grade science
Why is water essential to life?
Thursday, February 17, 2011 at 7:25pm

9th grade polynomials
How do you write the expression for the area of the rectangle If the length of a rectangle is two more than three times it's width,then write an expression for area of the rectangle Find the perimeter of the rectangle in problem 1.
Thursday, February 17, 2011 at 5:04pm

8th grade science
Why can high blood viscosity have negative effects? Also, name the medical condition that people can develop with high blood viscosity.
Thursday, February 17, 2011 at 3:31pm

7th grade math worksheet
Need help on how to actually do the rise/run and equations to figure out the anxwer to "What do you call a duck that steals?" worksheet. I can find the answer on your websight, but I need to show my work for numbers 1-6 using rise/run and numbers 7-18 using the ...
Thursday, February 17, 2011 at 3:04pm

Chemistry-pls help
Can we use an AR grade chemical for UV spectrophotometric analysis? Or is it a must to use a chemical that is specially designated (SpectrAR grade) for UV analysis?
Thursday, February 17, 2011 at 2:39pm

Chemistry-help needed
Can we use an AR grade chemical for UV spectrometric analysis? Or is it a must to use a chemical that is specially designated (SpectrAR grade) for UV analysis?
Thursday, February 17, 2011 at 9:10am

6th grade science
My son has to Compare and Contrast a normal fault and a reverse fault. Can you tell me if there is something he has left out in his answer? After reading in his science book this is what he wrote---- In comparing and contrasting a normal fault and a reverse fault it is known ...
Wednesday, February 16, 2011 at 10:39pm

algebra
a grade 6 class has 15 boys 12 girls. what is the ratio of boys to girls in the class?
Wednesday, February 16, 2011 at 4:57pm

Spanish-6th grade-Please check my answers
Could you please check these I think they're correct but I'm not sure. 1.How old am I? Tengo once años. 2.How old is your father? Mi padre tiene cuarenta y seis. 3.Do I have siblings? Sí,tengo dos hermanos. 4.Son mayores or menores? Son mayores. 5.Are you...
Wednesday, February 16, 2011 at 10:06am

6th grade science fair project
Each week up until fair time we have to turn in one aspect of our project. This week it deals with our conrol, dependent and independent variables and constants. I will tell you that I got my idea form sciencebuddies. My project is Ocean Currents: Modeling the 'Global ...
Wednesday, February 16, 2011 at 10:00am

Ecology
Estimate the fish population of Lake Champlain using the Lincoln-Peterson Method. -Number of fish of 1st capture: 60 -Number of fish of 2nd capture: 65 Marked fish in 2nd capture: 10 -Number of fish of 3rd capture: 65 Marked fish in 3rd capture: 15 -Number of fish of 4th ...
Wednesday, February 16, 2011 at 9:18am

8th grade math
Jessica is creating a heart-shaped card to give to her valentine. She has folded a square piece of paper in half and traced the pattern onto one half of the folded paper. The pattern consists of a right triangle with hypotenuse of length 7 1/2 inches and a semi-circle with a ...
Wednesday, February 16, 2011 at 2:34am

geometry
The road rose at an 8 degree angle, what is the grade?
Tuesday, February 15, 2011 at 10:56pm

6th grade math
the base of the great pyramid is a square with an area of 571536 ft squared. If one of the sides of a similar figure is 5 cm what is the area of the figure? How can I solve this?
Tuesday, February 15, 2011 at 9:37pm

Grade 11 English 3
What's the difference between lay and lie? and if you had..Tonya has___out in the sun since noon. which one do you use in past tense?
Tuesday, February 15, 2011 at 9:22pm

8th grade science
why does the high specific heat of water make it essential to life?
Tuesday, February 15, 2011 at 9:10pm

Grade 10 Science
Why is the name for the ionic bond FeS Iron (II) Sulphide when the charges on iron and sulphur are +2 and -2? Shouldn't the name be Iron (I) Sulphide? Same goes for Copper (II) Sulphide. Please explain!
Tuesday, February 15, 2011 at 8:42pm

5th grade math
How many possible combinations for an 8-digit binary number are there? How did you get this an answer?
Tuesday, February 15, 2011 at 5:25pm

Homophones/ 8th grade English
What is a homophone for racecourse?
Tuesday, February 15, 2011 at 11:47am

Spanish-6th grade
1.If someone's birthday is December 1 would I say Es el primero de diciembre or Es el uno de diciembre? I think I would say Es el uno de diciembre because I think I only use el primero for January/ Is that correct? 2. If I said my grandparents names are Mary and Clem would...
Tuesday, February 15, 2011 at 10:52am

science
can you give me a websight on electrons.
Monday, February 14, 2011 at 7:38pm

math
wai ling averaged 84 on her first three exams and 82 on her next 2 exams.what grade must she obtain on her sixth test in order to average 85 for all six exams? 94
Monday, February 14, 2011 at 5:54pm

8th Grade Probability
A box contains 6 red balls, 4 white balls, and 5 green balls. If three balls are drawn in succession without being replaced, what is the probability that they are drawn in the order red, white, green?
Monday, February 14, 2011 at 2:10pm

8th Grade Algebra
If Julie draws a card from a standard deck of well-shuffled playing cards, what is the probability that he draws either an ace or a heart?
Monday, February 14, 2011 at 1:37pm

8th grade Algebra
In a drawing for a dvd player, there are 100 tickets in a box.Five of the cards are marked with a star and the rest are marked with an X. To win, Carmen must draw two cards, without replacement, both of which are marked with a star. What is the probability that Carmen will win...
Monday, February 14, 2011 at 12:41pm

6th grade science project for PsyDAG
Thank You for answering PsyDAG. You asked what my hypothesis was. Here it is--Raising the temperature of the vegetable oil and thyme will increase the velocity of the mixture's movement. So is the question you responded to earlier, or actually late Saturday night correct??
Sunday, February 13, 2011 at 8:01pm

math 5th grade
Insert parentheses to make sentence true: 32 + (-4) - (-5) * 4 = 13
Sunday, February 13, 2011 at 3:20pm

math - 5th grade
Insert parentheses to make sentence true: 8^2 - (-9) + (-10) * 8 = 88 (8^2 is 8 squared, just couldn't type it in the traditional way).
Sunday, February 13, 2011 at 3:18pm

science
I'm in 5th grade and I need a cool, unusual science fair project. I have 3 days to do this. It has to be a question with a variable, not a demonstration. HELP!
Sunday, February 13, 2011 at 2:24pm

6th grade science project
My 1st science project and we have something to turn in each week from now till the science fair. this week it is the variables. Project from science buddies. I am doing-Ocean Currents: modeling the 'Global Conveyer Belt' in your Kitchen. Am I correct in my ...
Saturday, February 12, 2011 at 10:31pm

Math
Frank has a 65% chance of receiving an A grade in geology, a 60% chance of receiving an A grade in mathematics, and a 77% chance of receiving an A grade in geology or mathematics (or both). Find the probability that he receives A grades in both geology and mathematics. I get: ...
Saturday, February 12, 2011 at 9:05pm

Statistics - can someone check me
Frank has a 65% chance of receiving an A grade in geology, a 60% chance of receiving an A grade in mathematics, and a 77% chance of receiving an A grade in geology or mathematics (or both). Find the probability that he receives A grades in both geology and mathematics. P(geo ...
Saturday, February 12, 2011 at 5:33pm

science
can you give me a web site on the periodic table. Tgank you
Saturday, February 12, 2011 at 5:12pm

geometry
A road climbs at an 8 degree angle with the horizontal. What is the grade of the road?
Saturday, February 12, 2011 at 4:19pm

Business-3rd time posting
I posted this 2 times already, and this is my third time posting. For each of examples identify financial decision you have made or might have to make in the future. In the last column, tell what effect this decision may have on ur personal resources. (Personal resources ...
Saturday, February 12, 2011 at 1:06pm

math 5th grade
One morning, 8/9 of the customers at the diner ordered coffee. Regular coffee was ordered three times as much as flavored coffee. What fractional part of the customers orderd flavored coffee? I did it this way 8/9x3/1= 24/9=8/3 I got 2 2/3 It is wrong so please show me how to ...
Saturday, February 12, 2011 at 12:19am

science 6th grade
I am suppose to explain how the moment magnitude and Richter scales of earthquake measurement are similar and how they are different. Can you tell me if I am correct? They are alike because they always come up with the same rating for an earthquake. They are different because ...
Friday, February 11, 2011 at 11:25pm

PHYSICS grade 11
a 27 g arrow is shot horizontally. the bowstring exerts an average force of 75 N on the arrow over a distance of 78 cm. detrmine the speed of the arrow as it leaves the bow.
Friday, February 11, 2011 at 6:26am

5th Grade Math
There are about 3,400 species of frogs and toads, and scientists tell us that they represent 90% of the amphibians in the world. Using this information, what is total number of amphibians scientists believe are in the world. (Round your answer to the nearest 100.)
Thursday, February 10, 2011 at 11:26pm

math 3rd grade
what kinds of angles do you see in the letters E,F, and L? Is right correct
Thursday, February 10, 2011 at 7:16pm

Geometry
A road climbs at an 8 degree angle with the horizontal. What is the grade of the Road.
Thursday, February 10, 2011 at 6:52pm

math (8th grade)
The length of each piece in a model train railroad built on the HO scale is 1/87 of the actual length. Another popular model is the N scale, for which the scale is 1/160. Each car on a full-size passenger train is 80ft long. What is the length in inches of a model passenger ...
Thursday, February 10, 2011 at 6:02pm

health
Is it possible to have a stress-disorder? And if so, would it be deadly? Thank u for helping me with this strange question.
Thursday, February 10, 2011 at 5:32pm

fifth grade math
at the school free throw contest, jane made 48 out of 60 shots. max made 78% of his shots, who is the better free throw shooter
Thursday, February 10, 2011 at 4:24pm

5tth grade math
every student in a second grade class sends a valentine to each of the other students in the class, for a total of 306 valentines.How many students are in the class.
Thursday, February 10, 2011 at 4:07pm

7th grade introduction/conclusion
I have this stupid extra credit thing due tommorrow about the forest and I need the steps to writing an intro and conclusion because I forgot to bring home my notes??????? So if u could help me out I really appreciate it!!!!??? Thx Sara
Thursday, February 10, 2011 at 11:41am

math 5th grade
One morning, 8/9 of the customers at the diner ordered coffee. Regular coffee was ordered three times as much as flavored coffee. What fractional part of the customers orderd flavored coffee? I did it this way 8/9x3/1= 24/9=8/3 It is wrong so please show me how to do this ...
Thursday, February 10, 2011 at 9:43am

10 grade
A 80 slug car runs into a wall while moving at 10ft/s. If the car bounces off the wall with the same speed it struck it with as a result of having been in contact with the wall for .8 second, then find... a)... The initial momentum of the car b)... The final momentum of the ...
Thursday, February 10, 2011 at 12:44am

2nd grade
How do do the worksheet, guess my rule with two rules. Guess each rule and write it down. Using shapes.
Thursday, February 10, 2011 at 12:35am

5th grade math
Which answer shows data with a range of 49? A. 45,69,92,59 B. 95,59,52,89 C.99,66,51,52 D.55,99,78,50 if you select one of the answer .How do you solve the problem.? i was wonder how ?please explain your answer please!! so the next problem i try to solve by myself.for me thank...
Wednesday, February 9, 2011 at 9:10pm

5th grade math
In 2000 the population of goddard was 5,554. The population of Valley Center was 7,323. What is the Approximate difference between the populations, to the nearest one hundred people. please! help I'm totaly confuse with this question?? do you substract it?
Wednesday, February 9, 2011 at 9:02pm

Math
use the digits 1,2,3, and 4 to write a number in scientific notation that is close to .001 this was in a 7th grade algebra book... what? is this even possible without the use of 0?
Wednesday, February 9, 2011 at 8:50pm

math
im in the 5th grade and i need help is on metric measures and conversoins
Wednesday, February 9, 2011 at 5:17pm

4th grade fractions
Ms. Ross's class has 23 students.2/3 of her students have brown hair. The rest have blond hair. How many students have brown hair?
Wednesday, February 9, 2011 at 3:33pm

Spanish-8th grade
Could someone please check if I answered these questions correctly? Thank you Please let me know if I did anything wrong. ¿Hay un supermercado cerca de tu casa? Si, hay un supermercado cerca de mi casa. ¿Qué necesitas hacer hoy? Necesito estudiar hoy. &...
Wednesday, February 9, 2011 at 12:31pm

Math
1. Imagine driving down a mountainside. You see a sign indicating there is a 12% grade. Approximate the amount of horizontal change in your position if you note from elevation signs that you have descended 2000 feet vertically. Use the embedded equation editor in Blackboard to...
Wednesday, February 9, 2011 at 6:49am

3rd grade math - arrays
Mary says that the greater number of counters, the greater the number of different arrays you can form. Give an example that shows that Mary is wrong.
Wednesday, February 9, 2011 at 1:45am

Chemistry
How do I calculate the wavelength of the emission line when electrons drop from the 4th to the 3rd energy level in the hydrogen atom?
Wednesday, February 9, 2011 at 12:29am

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