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September 21, 2014

September 21, 2014

Post a New Question | Current Questions

**statistics**

A researcher wants to compare the variances of the heights (in inches) of 4 year college basketball players with those of players in junior colleges. A sample of 30 players from each type of school is selected, and the variances of the heights for each type are: 4 year ...
*Wednesday, April 17, 2013 at 9:30pm*

**physics**

A 0.49 cm high object is placed 8.5 cm in front of a diverging lens whose focal length is -7.5 cm. What is the height of the image?
*Wednesday, April 17, 2013 at 8:41pm*

**Physics **

If a marble of mass 4.0 kg and radius 0.2 m is rolling up an incline at 10 m/s and the incline is h meters high, what minimum height must that incline be in order for the marble to stop while on the incline?
*Wednesday, April 17, 2013 at 6:49pm*

**ocho rios primary school**

what is the plural of the word man.
*Wednesday, April 17, 2013 at 5:54pm*

**history**

Between 1947 and 1951, what did the loyalty boards that were established to root out subversives in government service do? a. They uncovered evidence of massive subversion and espionage within the Departments of State and Defense. b. They restricted their investigations to ...
*Wednesday, April 17, 2013 at 3:39pm*

**PHYSICS**

A small block of mass 0.5 kg is released from rest at the top of a ramp of mass 3 kg that sits on a frictionless horizonal surface. When the block leaves the ramp it has a speed of 4 m.s a)what is the recoil velocity of the ramp b) how high is the ramp?
*Wednesday, April 17, 2013 at 1:16pm*

**Science**

how to find the speed of a bullet just before it touches the ground when fired horizontally at a velocity 10 m/s from a watch tower 11.5 m high?
*Wednesday, April 17, 2013 at 12:56pm*

**Math**

What are the measurements of a box that will hold 160 blocks that are 2 centimeters wide, 1 centimeter high, and 4 centimeters long?
*Wednesday, April 17, 2013 at 12:25pm*

**Physicsy**

a ball thrown 45m high speed of 10m/s at what time reach the top?
*Wednesday, April 17, 2013 at 6:16am*

**Physics(science)**

A ball's projected at an angle X to the horizontal from a cliff 96 metres high and strikes the ground at a distance of 260 metres away from the cliff.The time of its flight is 7 seconds.If it's assumed that air resistance's negligible,calculate: 1.the initial ...
*Wednesday, April 17, 2013 at 4:58am*

**statistic**

A sample of 59 night-school students' ages is obtained in order to estimate the mean age of night-school students. x = 25 years. The population variance is 19. (a) Give a point estimate for μ. (Give your answer correct to one decimal place.)
*Tuesday, April 16, 2013 at 9:35pm*

**Clinical Chemistry**

Anyone here good with clinical chemistry, particularly separation assays and high performance liquid chromatography?
*Tuesday, April 16, 2013 at 9:01pm*

**Math**

Which is in order from least to greatest A.1/4,0.33,2/5,0.5,2/3 B.1/3,1/2,0.4,0.25,2/3 C.1/3,1/4,0/4,1/2,0.66 D.2/3,0.5,2/5,0.33,1/4 A Talent Show auditions were held after school. There were 3 groups who sang for every 2 groups that danced. If there were a total of 30 groups ...
*Tuesday, April 16, 2013 at 6:10pm*

**writing**

Hello, could someone please look over my English/writing assignment. Any input will help. Not finish still working on end. THANKS A Gift of dying is a Lesson in Living “The truth is once you learn how to die, you learn how to live.” (Albom, 1997, pg. 82). The poem &#...
*Tuesday, April 16, 2013 at 2:20pm*

**Life science,Maths and Geography**

I am in my last year of high school and not sure of which career path to follow.Please help me with all possible careers to choose from.
*Tuesday, April 16, 2013 at 10:40am*

**child development**

Johnny is a 5-year-old kindergarten student starting school for the first time. What changes do you expect to see Johnny go through in the course of his first year of school? Be specific in your response, addressing changes in his physical, emotional, and cognitive domains. ...
*Tuesday, April 16, 2013 at 10:37am*

**Math/ Calculus Help1**

Supplies are dropped from a stationary (not moving up or down) helicopter and, after some amount of time, land on the ground with a velocity of -160 feet per second. Assumptions: Start time at t = 0 and ignore air resistance. Recall that the height function is given by y(t)= ...
*Tuesday, April 16, 2013 at 1:17am*

**U.S/history AP**

1)--------practice in the south of borrowing the money necessary to plant a crop against that future crop.The money was loaned at excessively high interest rates and kept most white and black southerners in perpetual debt. my answer 1-crop-lien economy 2---------former ...
*Monday, April 15, 2013 at 6:08pm*

**Geometry **

The grade of a road or a railway road bed is the ratio rise/run, usually expressed as a percent. For example, a railway with a grade of 5% rises 5 ft for every 100 ft of horizontal distance. 1. The Johnstown, Pennsylvania, inclined railway was built as a "lifesaver" ...
*Monday, April 15, 2013 at 5:23pm*

**physics**

A projectile of mass 0.817 kg is shot straight up with an initial speed of 25.5 m/s. (a) How high would it go if there were no air resistance? (b) If the projectile rises to a maximum height of only 9.14 m, determine the magnitude of the average force due to air resistance.
*Monday, April 15, 2013 at 2:36pm*

**life orientation**

described the pratice of high risk sexual behavior amongs the adolescene
*Monday, April 15, 2013 at 10:11am*

**Geometry Part 2**

A highway makes an angle of 6 with the horizontal.This angle is maintained for a horizontal distance of 5 miles.To the nearest hundredth of a mile, how high does the highway rise in this 5- mile section?Show the steps you use to find the distance.
*Monday, April 15, 2013 at 10:03am*

**Livingston High**

61/3 =
*Monday, April 15, 2013 at 3:31am*

**algebra**

the elspaso middle school girls basketball team is going from el paso to san antonio for the texa state championship. The trip will be 560 miles. Their bus travels at an average speed 60 miles per hour.
*Sunday, April 14, 2013 at 10:56pm*

**math**

Marty walks to school 4 days each week. The walk talks 15 minutes. How much time does it take marty to walk to school & home each week. Is this correct? 15×4=60 it takes him an hour each week
*Sunday, April 14, 2013 at 8:38pm*

**english plzzzzzzzzz helppppp**

1-Our small community hasn't never had so many choices of bicycle shops. a-Our small community has hardly never had so many choices of bicycle shops. b-Our small community has never had so many choices of bicycle shops. c-Our small community hasn't hardly ever had so ...
*Sunday, April 14, 2013 at 6:39pm*

**philosphy**

I am to draft a six to eight page paper based upon a life changing decision that I or someone in my community had to make. I am considering writing about returning back to school but I am stuck on how to get started. Can someone please help.
*Sunday, April 14, 2013 at 11:13am*

**geography**

What regions have low or high annual precipitation?
*Saturday, April 13, 2013 at 7:36pm*

**catherine junior school**

I have 9 Numbers which are -4, -3, -2, -1, 0, 1, 2, 3, 4 i have to put these in a 3 x 3 square grid. The numbers have to add up to one majic number. Is there a logical way to do this??????
*Saturday, April 13, 2013 at 12:12pm*

**Math**

5.Mrs.Sandoval has 60 folders, 45 scissors, and 30 rulers. What is the largest number of equally divided school supply groups Mrs.Sandoval can create without any remaining supplies? A.5 B.10 C.3 D.15 D 6.What is the prime factorization of 550? A.2x5^2x11 7.What is the value of...
*Saturday, April 13, 2013 at 11:41am*

**Math**

1.A maximum of 149 students are allowed to be seated in the cafeteria at one time. The school janitor has already placed 8 tables that seat 9 students each. The remaining tables to be placed seat 7 students each. How many of the remaining tables can the janitor place in the ...
*Saturday, April 13, 2013 at 11:06am*

**chemistry**

Which of the following statements describes why ion exchange of 99% SiO2 - 1% B2O3 in a salt bath of molten postassium chloride (KCl) is not an effective way to increase the surface strength of the glass sample? The ion exchange works correctly, however both air-cooling and ...
*Saturday, April 13, 2013 at 5:46am*

**physics**

Tarzan (m = 68kg) swings down from a height of 4.8m on a vine to save Jane (m = 35kg) from some hungry hippos. if he gravs jane in an inelastic collision at the bottom of the vine's path, how high will they swing up to after the collision?
*Saturday, April 13, 2013 at 12:22am*

**chemistry**

Which of the following statements describes why ion exchange of 99% SiO2 - 1% B2O3 in a salt bath of molten postassium chloride (KCl) is not an effective way to increase the surface strength of the glass sample? a -The ion exchange works correctly, however both air-cooling and...
*Friday, April 12, 2013 at 6:50pm*

**personal**

Lilly collects data on a sample of 40 high school students to evaluate whether the proportion of female high school students who take advanced math courses in high school varies depending upon whether they have been raised primarily by their father or by both their mother and ...
*Friday, April 12, 2013 at 4:49pm*

**child daycare**

1. A _______-centered program is most helpful to the children served. A. family B. child C. school D. parent 2. The vision and goals of an afterschool program should be translated into a A. preprietorship. B. parent letter. C. newsletter. D. mission statement. 3. Which of the ...
*Friday, April 12, 2013 at 2:18pm*

**math**

The school meeting is on the 199th day of the calendar year, in (what month)?
*Thursday, April 11, 2013 at 8:50pm*

**algebra1**

a baseball is hit into the air. the path of the ball can be described by the equation h=23t-5tsquared, where h is the height in meters, and t is the time in seconds. how high is the ball after 3 seconds?
*Thursday, April 11, 2013 at 6:23pm*

**social studies**

I am to draft a six to eight paper based on a life changing decision me or someone in my community has to make. I am considering writing about returning to school but I am not sure how to start. Any suggestions.
*Thursday, April 11, 2013 at 4:28pm*

**HIGH SCHOOL DIPLOMA - Writing Skills 1**

1. Which of the following is correct in regard to the use of formal English? A. Formal English is used more frequently in speaking than in writing. B. In formal business correspondence, it's best keep the language impersonal. C. Contractions are considered acceptable in ...
*Thursday, April 11, 2013 at 4:25pm*

**statistics**

The average height of 18-year-old American women is 64.2 inches. You wonder whether the mean height of this year’s female graduates from your local high school is different from the national average. You measure an SRS of 78 female graduates and find that = 63.1 inches. ...
*Thursday, April 11, 2013 at 10:25am*

**physics**

a 40 kg student is riding a bicycle to school. the bicycle has a mass of 12 kg. the area that each tire makes contact with the road can be approximated by a rectangle of dimensions 6 cm x 4 cm. what is the pressure that each tire exerts on the road? give your answer in kPa to ...
*Wednesday, April 10, 2013 at 11:22pm*

**physics**

a 40 kg student is riding a bicycle to school. the bicycle has a mass of 12 kg. the area that each tire makes contact with the road can be approximated by a rectangle of dimensions 6 cm x 4 cm. what is the pressure that each tire exerts on the road? give your answer in kPa to ...
*Wednesday, April 10, 2013 at 11:20pm*

**physics**

a 40 kg student is riding a bicycle to school. the bicycle has a mass of 12 kg. the area that each tire makes contact with the road can be approximated by a rectangle of dimensions 6 cm x 4 cm. what is the pressure that each tire exerts on the road? give your answer in kPa to ...
*Wednesday, April 10, 2013 at 11:17pm*

**English**

Posted by rfvv on Sunday, April 7, 2013 at 11:03pm. Pansori is a kind of Korean folk play. 1. Bill is doing pansory at the school talent show. 2. Bill is presenting pansory at the school talent show. 3. Bill is acting out pansory at the school talent show. (Q1: Which one is ...
*Wednesday, April 10, 2013 at 10:26pm*

**LA**

jerry came to school incognito like superman in his clark kent glasses question; as used in the passage what does incogonito mean ? a. strength b. in a cape c. dressed formally D. disguised i pic C or D am i cerrect?
*Wednesday, April 10, 2013 at 7:44pm*

**algebra**

the local high school is setting up square-shaped lunch tables in the cafeteria. each table has an area of 12x^3-4x^2 square feet. if sqrt 3x+1 tables are put end to ed to form a banquet table, how long will the banquet table be? assume x>1/3 part 1: use theformula for area...
*Wednesday, April 10, 2013 at 6:25pm*

**physics**

Venus is a grade 12 learner and she claims that she can shoot a stone 50m vertically high by using a catapult.She wants to know the relationship between the height reached by the stone and the initial velocity of it.
*Wednesday, April 10, 2013 at 12:44pm*

**Reiny: Set Theory**

School counselor posted the following data after having had 150 students sign up for electives: Art - 65 students Band - 70 students Theatre - 50 students Not all students signed up for an elective.Show the data using Venn Diagrams. Shown with problem: three intersecting ...
*Wednesday, April 10, 2013 at 11:53am*

**Physics**

Help! Calculate the water pressure at the bottom of the 110--high water tower
*Wednesday, April 10, 2013 at 11:18am*

**chemistry**

Which of the following statements describes why ion exchange of 99% SiO2 - 1% B2O3 in a salt bath of molten postassium chloride (KCl) is not an effective way to increase the surface strength of the glass sample? a) The ion exchange works correctly, however both air-cooling and...
*Wednesday, April 10, 2013 at 8:59am*

**chemistry**

Which of the following statements describes why ion exchange of 99% SiO2 - 1% B2O3 in a salt bath of molten postassium chloride (KCl) is not an effective way to increase the surface strength of the glass sample? a)The ion exchange works correctly, however both air-cooling and ...
*Wednesday, April 10, 2013 at 8:39am*

**physics**

a golfer hits a golf ball which is 30m high infront of a 20m high tree. the ball just passes over the top of the tree. what was the vertical component of the initial velocity of the ball?
*Wednesday, April 10, 2013 at 2:08am*

**Government secondry school gwagwalada**

Consider the equation N2(g)+3NH2(g)---2NH3.what is the needed volume of nitrogen to react with 15cm3 of hydrogen?
*Wednesday, April 10, 2013 at 1:37am*

**math**

A population of animals oscillates between a low of 1098 on January 1 (t = 0) and a high of 2344 on July 1 (t = 6). (a) Find a formula for the population, P, in terms of the time, t, in months.
*Tuesday, April 9, 2013 at 8:51pm*

**Math**

What is the mean number of votes for the snow cone flavors? Cherry 40 Strawberry 7- Grape 30 Lime 20 Rainbow 40 A.180 B.36 C.40 D.18 C The range of a set of numbers is 52. The number with the greatest value in the set is 248. What is the number with the least value? A.52 B.204...
*Tuesday, April 9, 2013 at 6:29pm*

**Physics**

Calculate the water pressure at the bottom of the 110--high water tower
*Tuesday, April 9, 2013 at 1:45pm*

**Writing**

for this profile story i'm doing one of my sentences was Originally from central Indiana, Gilbert did not grow up in a diverse neighborhood, nor did she attend a diverse school system. My teacher told me to elaborate on when I say diverse.. Is this better? Growing up in ...
*Tuesday, April 9, 2013 at 9:06am*

**science**

1. _____ is the process by which food is broken down so that nutrients can be used by the body. (1 point) Absorption Digestion Elimination Ingestion 2. What type of digestion takes place in the mouth? (1 point) chemical mechanical chemical and mechanical neither chemical nor ...
*Monday, April 8, 2013 at 7:51pm*

**algebra 2**

Students at a high school all took the same English test. The scores are approximately normally distributed with a mean of 77 and a standard deviation of 9. If 2500 students took the test, approximately how many scored above 86 or below 68%?
*Monday, April 8, 2013 at 5:09pm*

**algebra 2**

In a high school, 35% of the 3500 students participate in sports. The school board is proposing a participation fee to help with costs. To get student opinion, the school board randomly selects a committee of 6 students to join a discussion of the proposal. That is the ...
*Monday, April 8, 2013 at 5:06pm*

**Albebra 2**

A school wants to determine the average time it takes students to get to school. Every student coming off the bus is surveyed. What is the sampling method used? Does the sample have a bias?
*Monday, April 8, 2013 at 5:03pm*

**algebra.. HELP ME!!**

Mai spends 7 3/4 hours in school each day. Her lunch period is 1/2 hour long, and she spends a total 7/10 hour switching rooms between classes. The rest of her day is spent in 6 classes that are all the same length. How long is each class?
*Monday, April 8, 2013 at 4:53pm*

**aig math(Ms.Sue)**

Your school librarian has asked your class for some help on the purchase of some new bookcases with 2 shelves each. She has 300 new books she needs to shelve. 1/2 of the books are half an inch thick. 1/3 of them are 1/4 of an inch thick, and the rest are three fourths of an ...
*Monday, April 8, 2013 at 4:27pm*

**Statistics help Please**

The table below reports birth weight and whether the mother smoked for 189 pregnancies. If Smoking and Birthweight were independent, then we would expect the number of low birth weight babies born to smoking mothers to be: (???/???) * ??? = 23.1 The residual for the ...
*Monday, April 8, 2013 at 4:04pm*

**M.H.S**

Marry claims that she can shoot a stone 50m vertically high using slingshot .what is the relationship of the height reached by the stone and initial velocity of it?
*Monday, April 8, 2013 at 3:59pm*

**jardan high. general science**

water,anchorge,photosynthesis,mineral,food,support. The main functions of roots are { } and taking in { } and { }. The stems { } the other parts of the plant and transport { },{ } and around the plant.the leaves are the main part making { } by { }.
*Monday, April 8, 2013 at 2:43pm*

**Algebra**

the angle of elevation from bottom to the top of the mountain has a measure of 60 degrees. suppose a ski lift to the top is 2000 feet long. how high is the mountain to the nearest feet? Am I suppose to find the sine of 60?
*Monday, April 8, 2013 at 2:31pm*

**Masemola high school**

Two institution or organisations that are involved in supporting or giving redress to these disasters. Teenage pregnancy, lack of infrastructure and genetically modified foods.
*Monday, April 8, 2013 at 1:38pm*

**English (Check Please)**

1. The speaker’s use of many exclamation points and imperative statements in “Beat! Beat! Drums!” helps readers feel the tone’s (Points : 3) humor. urgency. quiet calm. high spirits. 2. With what kind of life are the images in the second stanza of “...
*Monday, April 8, 2013 at 12:11pm*

**Chemistry**

If the strips of MG ribbon are coated with white MgO, would this cause the mass of Mg that you calculate to be too high or too low? Why?
*Monday, April 8, 2013 at 11:57am*

**Chemistry**

If your partner did not take into account the vapor pressure of water when calculating the moles of hydrogen produced, would the mass of Mg that was calculated at the end of the experiment be too high or too low? Why?
*Monday, April 8, 2013 at 11:56am*

**Probability**

A school is running a raffle for two prizes. 59 tickets were sold for the raffle, numbered 1,…,59. All the tickets are put into a hat and a teacher picks out two tickets which have numbers i and j from the hat. What is the expected value of |i−j|?
*Monday, April 8, 2013 at 8:48am*

**English**

1. He is doing voices of the former President Kim Youngsam at the school talent show. 2. He is imitating the voices of the former President Kim Youngsam at the school talent show. 3. He is mimicking the voices of the former President Kim Youngsam at the school talent show. (...
*Sunday, April 7, 2013 at 11:31pm*

**English**

Pansori is a kind of Korean folk play. 1. Bill is doing pansory at the school talent show. 2. Bill is presenting pansory at the school talent show. 3. Bill is acting out pansory at the school talent show. (Q1: Which one is correct in the sentences above? Q2: Do we have to use...
*Sunday, April 7, 2013 at 11:03pm*

**grammar English**

I am writing about interviewing Deaf Persons for my ASL research paper. The first person is Christian DeGuzman. He is profoundly deaf since birth, and about 2 or 3 years old later they found out that he was deaf that’s why. Christian grew up in Bay Area, went to ...
*Saturday, April 6, 2013 at 10:21pm*

**Poetry**

Please check this. "Hope is the thing with feathers That perches in the soul, And sings the tune--without the words, And never stops at all, "And sweetest in the gale is heard; And sore must be the storm That could abash the little bird That kept so many warm. "...
*Saturday, April 6, 2013 at 9:36pm*

**poetry...**

"Hope is the thing with feathers That perches in the soul, And sings the tune--without the words, And never stops at all, "And sweetest in the gale is heard; And sore must be the storm That could abash the little bird That kept so many warm. "I've heard it ...
*Saturday, April 6, 2013 at 8:02pm*

**LA 101-STUDY SKILLS**

How can i write a thesis statement for this statement:The target for achieving universal primary education is that by 2015, children everywhere,both boys and girls must complete full cycle of primary school.
*Saturday, April 6, 2013 at 2:15am*

**Math**

A survey about the student government program at a school finds that of 245 students: 218 students like the program 27 students think the program is unnecessary If a circle graph were made from this data, what would the measure of the central angle be for the group that likes ...
*Saturday, April 6, 2013 at 1:08am*

**math**

tom,jack and joe are the fastest runners in the school.if they race one another,without dead heats,how many combinations can they finish in if they occupy the first 3 places ?
*Friday, April 5, 2013 at 11:00pm*

**epidemiology **

In a study examining associations between level of education and response to the Philadelphia Public Health Department’s emergency messages to “shelter in place” (meaning stay in your home) following an accidental release of chemicals from the Sunoco refinery in...
*Friday, April 5, 2013 at 5:28pm*

**early chlhood**

Ms. Sue you do not know me and I do not know you. I am not a cheater because I have a lot going on in my life. My husband has stage four cancer and I am trying to finish school and also take care of my two small children. I watching my husband die in front of my eyes and that ...
*Friday, April 5, 2013 at 3:11pm*

**physics**

A police offer may warn that “speed kills.” In video games, high-speed crashes are common. Suppose a particular scene in a game required the following elements: • a high performance motorcycle must crash into a barrier and be stopped • a small scooter must ...
*Friday, April 5, 2013 at 1:46pm*

**English**

Any drinks that start with Q? Doing this thing for school where we have 10 topics and 1 of them is drinks and I cant think of a drink that starts with Q. Name things of that topic from A-Z of the alphabet
*Thursday, April 4, 2013 at 5:58pm*

**abc**

Alice, Bob, Candice and David run for school president. There are 201 students in the school and each student can vote for only one candidate. The person with the largest number of votes is the winner. If every student votes, what is the minimum number of votes needed to win ...
*Thursday, April 4, 2013 at 4:30pm*

**anatomy physiology/check please**

Muscular dysgenesis or dysgeny is a lethal, recessive, genetic disease of mice that is caused by a mutation in the mdg gene. Skeletal muscles from dysgenic mice are paralyzed and the animals die shortly after birth. You are a research scientist interested in the finding the ...
*Thursday, April 4, 2013 at 2:44pm*

**physical**

Rank the following 3 classes of materials in order of increasing typical Young's Modulus: metals such as copper, plastics such as HDPE (high density polyethelene), and ceramics such as alumina (Al2O3). Do not look up the values of Young's Modulus, instead base your ...
*Thursday, April 4, 2013 at 1:18pm*

**7th Grade Language Arts**

4. The Latin word alius means "other." Which of the following words contains this root? (1 point) alien alight alike alignment 5. The Anglo-Saxon root sla- means "to strike." Which of the following words does not share this root? (1 point) slap slaughter ...
*Thursday, April 4, 2013 at 1:14pm*

**science**

Pls how can I carry out qualitative analysis on iron 11 ammonium sulphate hexahydrate (NH4)2SO4.FeSO4.6H2O in a secondary school laboratory?
*Thursday, April 4, 2013 at 12:25am*

**Math**

A national survey shows that 13 out of every 25 middle school students have cell phones Patton MIddle School has 475 students about how many students can have cell phones 38 273 247 325 325?
*Wednesday, April 3, 2013 at 10:19pm*

**Math**

1.There are 240 boxes of caramel popcorn on the grocery store shelf. IF 2 out of every 15 boxes contain a secret decoer ring as a prize how many boxes can be expected to contain a secret decoder ring? A.30 B.24 C.16 D.32 C 2.The ratio of green tiles to purple tiles in the art ...
*Wednesday, April 3, 2013 at 9:16pm*

**Chemistry**

What effect on the molar mass of the unknown acid would each of the following have-that is-would it make the calculated molar mass high, low, or would it have no effect? 1. Adding 5 drops of phenolphthalein instead of 1 drop. 2. Using a standard NaOH solution that has been ...
*Wednesday, April 3, 2013 at 7:34pm*

**physics**

Romeo is trying to climb a ladder placed 3 meters away from a 4 meter high tower where Juliet is stuck. He weighs 110 kg, the ladder weighs 25 kg. Can Romeo climb to the top of the ladder? If so, can he bring Juliet back down with him?
*Wednesday, April 3, 2013 at 6:26pm*

**math**

The school parking lot had room for thirty cars. If all the spaces except six were filled, what fraction of the parking lot was in use? If Mrs. Johnson parks in one of the empty spaces, how does the fraction change? Please answer and explain.
*Wednesday, April 3, 2013 at 6:21pm*

**chemestry please check my anwers. **

1.How do acid-base reactions differ from oxidation-reduction (or "redox") reactions? Answer Acid-base reactions involve an exchange of protons whereas redox reactions involve an exchange of electrons.<<< Acid-base reactions and redox reactions involve ...
*Wednesday, April 3, 2013 at 5:27pm*

**English**

The classroom has 10 short/low chirs, 10 tall/high chairs, 10 small desks, 10 big desks, 5 windows, and 20 lockers. (Did I use correct adjectives? Would you check them?)
*Wednesday, April 3, 2013 at 5:11pm*

**math x**

8. The Chicago Public School system has about 680 schools. About 130 of the schools will be closed. If five schools are chosen at random find the probability that at least 3 of them will be closed.
*Wednesday, April 3, 2013 at 4:59pm*

**math statistic**

The Chicago Public School system has about 680 schools. About 130 of the schools will be closed. If five schools are chosen at random find the probability that at least 3 of them will be closed.
*Wednesday, April 3, 2013 at 3:51pm*

**physics**

A 5.11-kg pendulum bob, at a height of 0.730 m above the floor, is released and swings down to the ground where it collides elastically with a 2.29 kg block initially at rest. The block then slides up a 31.0° incline. Find how high up the incline the block will slide if (a...
*Wednesday, April 3, 2013 at 12:23pm*

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