Friday
September 19, 2014

Posts by bria


Total # Posts: 91

geography
List as many ways as you can remember about how you are involved in the burning of fossil fuels on a dily basis.
July 8, 2014

english
on my first baby-sitting job ,I found that one must have____patience to take care of young children
November 3, 2013

chemistry
2.4g of a compound of carbon, hydrogen and oxygen gave on combustion, 3.52g of CO2 and 1.44g of H2O. The relative molecular mass of the compound was found to be 60. a)What are the masses of carbon, hydrogen and oxygen in 2.4g of the compound? b)What are the emperical and ...
October 20, 2013

chemistry
2.4g of a compound of carbon, hydrogen and oxygen gave on combustion, 3.52g of CO2 and 1.44g of H2O. The relative molecular mass of the compound was found to be 60. a)What are the masses of carbon, hydrogen and oxygen in 2.4g of the compound? b)What are the emperical and ...
October 20, 2013

Geometry
Find the surface area of a cylinder whereas diameter is 9 ft and height is 24 ft
March 28, 2013

math
need help
March 7, 2013

math
2x^2+7x+3/x^2-2x-15
March 7, 2013

math
okay my answer is correct 128,246
July 15, 2012

math
If the the total enrollment in LA county combined schools was 1,583,283 students in 1997, approximately how many of those student were Asian at 8.1 8.1% choices: 194,467, 904,055, 128,246 , 19,546,704, 1,282,459 my answer is 128,246 multiplied 1583283*8.1%= 128,24592.3
July 15, 2012

probability
i figured it out 5*5*5=125
July 15, 2012

probability
i typed the wrong answer it is 125
July 15, 2012

probability
3. A bag contains five different lightbulbs. The bulbs are the same size but each has a different wattage. If you select three bulbs at a random,how many different outcomes will be in the sample space if the bulbs are selected without replacement? I understand there is 5 ...
July 15, 2012

Math
thanks for the explaning it. I understand that much better
July 14, 2012

Math
The mean of five numbers is 8. If one of the numbers is removed from the list, the mean becomes 7. what is the number that was removed. I could not figure this out.
July 14, 2012

statistic
age days in hospital 40 11 36 9 30 10 27 5 24 12 a. draw a scatter diagram (completed) b. does there appear to be a correlation between age and number days in the hospital? no Find the r value for this problem to verify your answer? R=.16 c what is the regression equation for ...
July 14, 2012

statistic
age days in hospital 40 11 36 9 30 10 27 5 24 12 a. draw a scatter diagram (completed) b. does there appear to be a correlation between age and number days in the hospital? no Find the r value for this problem to verify your answer? R=.16 c what is the regression equation for ...
July 13, 2012

TI 84 Plus
How do i get to the regression equation on the ti84 plus calculator. I am working on a math problem trying to view my equation once i plugged in the data
July 13, 2012

statistic
If the total enrollment in LA County Combined schools was 1,583,283 students in 1n 1997, approximately how many of those students were Asian. Other =2.70% White =20.30% Black =11.80% Asian = 8.10% Hispanic 57.10% answer: I multiplied 1,583283*0.0810=128,246 Is this correct?
July 13, 2012

statistic
1.The state highway patrol stops every 5th car on highway 210 to check drivers' licenses and registrations. Which sampling technique are they using? systematic sampling -chose this one convenience sampling cluster sampling simple random sampling stratified sampling 2.You ...
July 13, 2012

statistic
thanks!
July 12, 2012

statistic
except for the company you use for your cell phone I meant to take that out.
July 12, 2012

statistic
Choose ALL that represent quantitative data. the amount of time you spend studying each week your street address how many years you have owned your car the company that you use for cell phone service the number of people who live with you your score on the last MAT 115 test my...
July 12, 2012

statistic
I guess to look at it would fall into the salary range. i was looking at average is how i got my answer thanks!
July 12, 2012

statistic
Which "average" would be best to use in the following situation? The accountant for a small company is asked to determine the average salary of its employees. The company is owned by two brothers who each make over $300,000 per year. The accountant makes $80,000 per ...
July 12, 2012

statistic
what type of correlation would you expect to exist between people's height and their shoe size? My answer is a positive correlation.
July 12, 2012

statistic
thanks i am getting it
July 12, 2012

statistic
The data below represent the ages of female actors at the time of winning an Oscar (1956 - 1996). 41 27 34 34 41 30 61 42 49 27 31 60 34 35 74 21 29 39 39 37 61 26 31 33 41 33 38 30 26 37 41 49 26 35 28 24 35 42 33 38 81 45 What is the frequency for the class 41 - 50? the ...
July 12, 2012

math
ok, I understand now thanks!
July 12, 2012

math
Suppose 48% of the general population of thw world has blood type O, 27% blood type A, and 23% blood type B. a. what is the probability that someone has type AB blood( assume that there are only four blood types? b. Of tjere are 30 people in a room,how many would you expect to...
July 12, 2012

Probability
thanks!
July 11, 2012

Probability
If a women with a BMI below 25 are considered to be normal weight, how many of these women would be classified as overweight? If you choose a woman at random, what is the probability that she will be overweight. Chart below BMI Frequency 15.0-19.9 9 20.0-24.9 12 25.0-29.9 25 ...
July 11, 2012

math
4/11 got it thanks!
July 7, 2012

math
2/11 got it
July 7, 2012

math
I hope i am on the right track. Please look at my answer so I am doing correctly. The letters of the word mathematics are written on separate pieces of paper and put in a hat. What is the probability of drawing a vowel from the hat? (vowels are a, e, i, o u.) Number of letters...
July 7, 2012

math
Tom plans to purchase a used car for $18,450. The dealership will finance his purchase at 10.5% APR for 48 months. Calculate the amount of Tom's monthly payment if he makes a down payment of $3,450 on the car
July 6, 2012

math
How much interest will you earn on $5,000 if you invest the money in a 5-year certificate of deposit earning 3% compounded quarterly. Round your answer to the nearest cent.
July 6, 2012

math
thanks
July 6, 2012

math
Mary has seven decorative vases to arrange on a shelf. How many different arrangements are possible?
July 6, 2012

probability
11 in mathematics so 2/11
July 5, 2012

probability
The letters of the word mathematics are written on separate pieces of paper and put in a hat. What is the probability of drawing the letter m from the hat? my first answer is 2/12= 1/6 someone else has 2/11 please show us the correct answer thanks!
July 5, 2012

math
If your class has 10 males and 14 females in it, how many different committees consisting of 4 males and 4 females may be chosen.
July 4, 2012

math
1. A card is drawn from an ordinary deck of 52 playing cards. What are the odds in favor of drawing an ace? 2. The letters of the word mathematics are written on separate pieces of paper and put in a hat. What is the probability of drawing a vowel from the hat? (vowels are a, ...
July 4, 2012

world history
The animating principles of Benedict's rules for monks are the quest for salvation and
April 26, 2012

Chemistry
Write the net ionic equation for the precipitation reaction between ammonium sulfide and cadmium nitrate.
March 4, 2012

math
the factors of 8 that she can roll are 4,8,and 8 there are 6 sides to the cube therefore six posibilites total so 3/6 chance because 2/6 chance of rolling 8 and 1/6 chance of rolling 4 2/6 +1/6=3/6
March 1, 2012

arithmetic
21terms/3terms=7groups of 3terms 237(last group)-129 (middle group)=36 237(group7)-36=201(group6) group6-36 group5-36 129(group4)-36=95(group3) group3-36 group2-36 add up all group terms(237+201+165...) Hope thats what your looking for if not sorry, but that should be right
March 1, 2012

Physics
Workers have loaded a delivery truck in such a way that its center of gravity is only slightly forward of the rear axle, as shown in the drawing. The mass of the truck and its contents is 6675 kg. Find the magnitudes of the forces exerted by the ground on the following. (a) ...
March 1, 2012

Chemistry
ok so for the second part this is what I did. 0.082=x/4=0.328g 0.08969=x/2=0.179g I feel like I have done something wrong though
February 19, 2012

Chemistry
Ok so for the first part I got x=0.08969 for H2 and x=0.082 for He. but how do I convert to molecules? Working on the second part now
February 19, 2012

Chemistry
You have two gas-filled balloons, one containing He and the other H2. The H2 balloon is twice the size of the He balloon (let the He balloon have a volume of 1 -L and the H2 balloon. a volume of 2 L). The pressure of gas in the H2 balloon is 1 atm while that in the He balloon ...
February 19, 2012

Math-geometry
f t t f f
July 12, 2011

chemistry
A buffer is formed by mixing 100 mL of 0.2 M HClO2 and 200 mL of 0.7 M KClO2. What volume of 0.2 M KOH can be added before the buffer capacity is reached?
March 2, 2011

math
find the fracton notation for the ratio 73/88
February 18, 2011

oz
IT TAKES 60oz of grass seed to seed 2400ft^2 of lawn. at this rate, how much will be needed for 4400ft^2 of lawn?
February 17, 2011

P I
the amount in a savings account increased from $60 to $84. what i sthe precent increase?
February 17, 2011

MPG
a passenger car will go 525 miles on 17.5 gallons of gasoline in city of driving. what is the rate miles per gallon?
February 17, 2011

notation
precent notation of 5/8
February 17, 2011

commission rate
a salesperson earns 150 commission selling 3,000 worthof television sets. what is the commission rate?
February 17, 2011

Math
The cost for a 30-second ad during the 2010 Super Bowl was $2.8 million. Assuming the rate per second to be constant, what was the average cost per ad that was broadcast during the Super Bowl in 2010? Express your answer as a whole number to the nearest thousand dollars.
February 13, 2011

algebra
-6m+3/11=7
January 20, 2011

9th grade
you push a book on a table so that its velocity is constant. If the force you apply is 15 N, what is the force due to sliding friction
November 1, 2010

10th grade
HOW DO YOU YOU ADD ALL THE HEARD MATH WITH THE EASY
September 30, 2010

3rd grade
24
September 9, 2010

math
(x/8)+ (x/8)= 9/8
September 5, 2010

idk, math i guess
is it 1/3
July 14, 2010

idk, math i guess
its not homework a family bet.....thnk you
July 14, 2010

idk, math i guess
my uncle said wat is the anwser please (he is a middle school drop out)
July 14, 2010

idk, math i guess
ms sue
July 14, 2010

idk, math i guess
my uncle is to lazy to reduce wat is the finished product plzz
July 14, 2010

idk, math i guess
thnks !!!!
July 14, 2010

idk, math i guess
if the average person drinks 8(8 oz.) glasses of warter per day,rather than a person who drinks 12 8 oz. of warter after a morning excersise session has consumed what fraction of the daily average?.
July 14, 2010

Chemistry Honors 10th
How much heat is required to warm 122 g of water by 23.0 degrees Celsius?
April 21, 2010

math
what fraction of 1 liter is 1 milliliter?
February 5, 2010

8th grade
how does a rodeo star get around
October 6, 2009

math
i am a three-digit number. i am made up of three different numerals. i am divisble by eleven.
September 10, 2009

math
The sum of what 2 prime numbers equals 16?
January 4, 2009

math
1).Write the first five terms of the sequence whose nth term is -10n-1. 1ST_ 2ND_ 3RD_ 4HT_ 5TH_
December 11, 2008

Math
What is the cardinal number for the follwing sets? 1). 101,102,103,104,....121 2). (1,2) (101,102) (0,105)
December 11, 2008

Math
What is the cardinal number for the following sets? A) 101,102,103,104,.......121 B) (1,2), (101,102), (0,105)
December 11, 2008

math
what is 121 divided by 4(8 - 2)!
October 18, 2008

Math
Which best describes the relationship between the lines with equations 8x+y=6 and 16x+2y=0 (a) perpendicular (b) parallel (c) same line (d) neither parallel nor perpendicular
September 4, 2007

fractions URGENT!!!!!!!!!!!!!!!
Is 2/3 the smallest out of 1/3? Are you asking if 2/3 is smaller than 1/3? If that's your question, the answer is no. If that's not your question, please rephrase so teachers will understand. Thanks. =)
February 26, 2007

simple intrest
I got 834, and 1.70 write down that answer and write me back and tell me if its right my daughter asked me for help but i really don't get it please tell me if its right
February 20, 2007

chemistry
I have to find the weight percent of Na2Co3 for my lab report that's due tomorrow but I have no idea how to do it. In the lab I had to wdight 0.4 g of the unknown soda ash sample into an erlenmyer flask and add about 50 mL of deionized water. Then I had to add 2 drops of ...
September 20, 2006

chemistry
The KHP used in the titration with NaOH was contaminated with sodium hydrogen phyhalate (NaHC8H4O4), but you didn't know it. State the effect of the final result (falsely high, falsely low, or unaffected) Explain. thanks These problems must be reasoned through. (1)mols KHP...
September 20, 2006

chemistry
HCl is titrated with NaOH. When doing the titration, some of the NaOH splashed onto the inside surface of the Erlenmyer flask, and you forgot to rinse it into your sample. Would the systematic error be falsely high, low, or unaffected and why? Thanks. As I understand the ...
September 17, 2006

chemistry
We are determining the molarity of HCl by titration of HCl. What would be the complete equation and the net ionic equation? THanks What are you titrating it with? Won't that make a difference in the equation we write? It's titration of HCl with NaOH. molecular equation...
September 17, 2006

chemistry
If a solution of 0.10 M silver nitrate, AgNO3, is slowly added to a solution containing 0.010 M potassium iodate, KIO3, and 0.20 M sodium bromate, NaBrO3, what precipitate will form first. Will this precipitate form nearly completely (99%) before the second precipitate starts ...
September 13, 2006

chemistry
The percentage of phosphourus in a detergent product may be determined by sample treatment including the precipitation of magnesium ammonium phosphate MgNH4PO4*6H2O (MW=245.41), using an excess of both magnesium and ammonium ions. The separated ans washed precipitate is then ...
September 12, 2006

chemistry
Calculate the ionic strength of the solution. a) 100 mL of 0.8M magnesium perchlorate, Mg(ClO4)2, is added to 900 mL of 0.30M perchloric acid, HClO4. No reaction. B)25 mL of 0.200M potassium iodide, KI, are mixed with 75 mL of 0.0300 M silver nitrate, AgNO3. Silver iodide ...
September 8, 2006

chemistry
HCL is tritrated with NaOH. KHP is then added. A possible source of systematic error in this experiment is failure to dry the KHP. If this occured, would the final wt% NA2CO3 be falsely high, falsely low, or unaffected. Give reasoning. Thanks. You have left out much of the ...
September 6, 2006

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