Thursday

April 2, 2015

April 2, 2015

Total # Posts: 221

**algebra**

Suppose a sample of Cesium-137 with initial mass of 200 grams decays to a mass of 160 grams voer the course of 10 years. Find the half-life of Cesium-137 (Round to the nearest year) How much Cesium-137 is left in the sample after 60 years? Round to the nearest tenth of a gram.
*July 30, 2011*

**chemistry**

what is the volume of a rectangle that has a mass of 19.0 and a density of 10.50 g/mL
*July 16, 2011*

**College Algebra**

Thank you bobpursley!
*July 15, 2011*

**College Algebra**

A farmer has 100 yeards of fencing with which to enclose two adjacent rectangular pens both bordering a river. The farmer does not need to fence the side with the river. What should the dimensions of the two pens together (a rectangle) be in order to yield the largest possible...
*July 15, 2011*

**Chemistry**

How many grams are in 8.2x10 to the power of 22 molecules of Fe2O3?
*June 15, 2011*

**math**

A partial payment is made on the date(s) indicated. Use the United States Rule to determine the balance due on the note at the date of maturity. (The Effective Date is the date the note was written.) Assume the year is not a leap year. P $1900, R 6%, effective date april 10, ...
*June 13, 2011*

**Empirical Probability**

Explain how empirical probability can be used to determine whether a die is “loaded” (not a fair die).
*May 30, 2011*

**Chemistry **

Which shows 15/c9d3 in simplified radical form with the smallest possible index?
*May 25, 2011*

**Science**

There's a grauph and obove the grauph it says gravity (mass movement) and then it says pg 67 69 and i dentify 4
*May 5, 2011*

**MP Marking**

It stands for maylin products.. I have a ring with same MP.. And I've. Been on google tryin to find out more info
*April 28, 2011*

**chemistry**

At room temperature, 20° C, water (H2O) is a liquid and oxygen (O2) is a gas. Based on kinetic molecular theory, which answer best explains the states of the two fluids?
*April 18, 2011*

**Science PLEASE HELP!!**

Relate the function of the following protist structures to human organs with similar functions: a)nucleus b)contractile vacuole c)food vacuole
*April 12, 2011*

**chemistry**

Calculate how many mL of the 5% w/v AgNO3* solution must be added to 0.4020g of the sample to precipitate all the chloride. Assume the sample is NaCl. * this means tat there are 5 grams of silver nitrate present per 100ml of solution.
*April 3, 2011*

**math**

Algebra:Functions Tell whether each represents a function. Explain. Area=LenghtxWidth
*March 29, 2011*

**Chemistry**

What happens if a student adds distilled water to a flask before starting the titration?
*March 29, 2011*

**Chemistry**

What happens when NaOH has been sitting for a couple of days without cover before starting the titration?
*March 29, 2011*

**Math **

Yeah that's what I thought. But I wasn't sure which was greater, the larger exponent or the smaller one. It's kinda confusing when your dealing with decimals and negative exponents. But thankss :)
*March 28, 2011*

**Math **

Which expression represents the larger number? A. 40.1 x 10 to the -6 power B. 4.1 x 10 to the -7 power C. 0.411 x 10 to the -6 power D. 0.04001 x 10 to the -5 power I got A, but I'm not quite sure if it's the right answer :/
*March 28, 2011*

**physics**

a 650 newton crate rests on the floor. how much work is required to move it at a constant speed, 3 meters against a friction force of 150 Newtons
*March 22, 2011*

**Word Problems**

The manager has one type of coffee that sells for $5 per pound and another type that sells for $11 per pound. The manager wishes to mix 90 pounds of the $11 coffee to get a mixture that will sell for $10 per pound. How many pounds of $5 coffee should be used?
*March 7, 2011*

**Chemistry**

If you react 55g of hydrazine and 55g of oxygen gas, what is the maximum moles of nitrogen dioxide gas that can be made and what is the limiting reagent?
*March 1, 2011*

**Math please help!!**

Solve the system using substitution. y = -2x + 5 3y = -x - 5 I already got the answer, just wanna make sure it's correct. Please show work as well.
*February 28, 2011*

**Math**

Solve each system x + 3y = 6 4x - 5y = 7 I need to know what x and y equal??
*February 23, 2011*

**Math**

Solve each system x + 3y = 6 4x - 5y = 7 I need to know what x and y equal??
*February 23, 2011*

**Math**

Oh alright I got it thank you :)
*February 23, 2011*

**Math**

What is 10x + 2y - 10 = 0 in slope intercept form ? and can you also explain how you got the answer cause I'm not really sure how to convert that into slope intercept (y = mx + b) m = slope and b = y intercept
*February 23, 2011*

**Math**

solve each system 1) 3x + y = 6 2x + 3y = 13 2) 2x + 5y - 6 = 0 -2x + y - 2 = 0 3) x + 3y = 6 4x - 5y = 7
*February 22, 2011*

**Math**

Okay so no one wants to help... alright -_-
*February 22, 2011*

**Math**

OMG SOMEONE HELP PLEASE !!!! :/ I'm desperate
*February 22, 2011*

**Math**

So my teacher is making me solve systems by graphing. One of them was 3x + y = 6 and 2x + 3y = 13 . I converted both of them into slope intercept form and got y = -3x + 6 and y = -2/3x + 13/3 . The thing is I don't know how to graph a fraction ?!?!?! And if I turn that ...
*February 22, 2011*

**Biology**

Kay so these are the strands of DNA 5' C C A G T A G T T 3' 3' G G T C A T C A A 5' Let's say the DNA molecule above were the parent strand of DNA. when the strands are split for replication, which strand would be the template for the leading strand? And ...
*February 20, 2011*

**Math **

1) What is the slope of a line that is parallel to y = 2? 2) What is the slope of a line that is perpendicular to y = 2? 3) What is the slope of a line that is parallel to x = -4? 4) What is the slope of a line that is perpendicular to x = -4? I don't get any of these ...
*February 16, 2011*

**Math**

I'm sure about it now :) Thank you for your help. I know it is C because once I put in the x and y axis into the equation, I multiplied 1/5 with -10 then added one and the result was three that's how I knew it was C :)
*February 15, 2011*

**Math**

Ummm is it C?
*February 15, 2011*

**Math**

For 1, I got G and for the second one I got B. are they correct?
*February 15, 2011*

**Math**

I need help with two problems. Just want to make sure that the answers I put are correct. 1) Which of the following is an equation of a vertical line? F. 4x + 5y = 0 G. -4 = 16x H. 3y = -9 I. 4x + 5y = -1 2) Which equation is the equation of a line that passes through (-10, 3...
*February 15, 2011*

**chemistry**

11 g over 100 g H2O at 20 degrees celsius
*February 8, 2011*

**5th math**

Math fractions decimals and percentage
*January 27, 2011*

**Math **

Please... someone help! :(
*January 26, 2011*

**Math **

For the equation y = -6x, what is the slope and y intercept? The formula is y = mx + B. I know that m = the slope and B = the y intercept. So in the equation y = -6x, what is the slope and y intercept? Is -6 the y intercept or the slope? Because if it's the slope, How am I...
*January 26, 2011*

**Math **

For the equation y = -6x, what is the slope and y intercept? The formula is y = mx + B. I know that m = the slope and B = the y intercept. So in the equation y = -6x, what is the slope and y intercept? Is -6 the y intercept or the slope? Because if it's the slope, How am I...
*January 26, 2011*

**Math**

Thank you (: Yes, I did. It's correct right?
*January 15, 2011*

**Math**

1. What are the next two terms of the following sequence? -3, 1, 5, 9... 2. What are the next two terms of the following sequence? -2, 4, -8, 16... 3. What is the common difference of the following arithmetic sequence? 13, -7, -27, -47... 4. What is the ninth term of the ...
*January 15, 2011*

**Math**

Write an equation in slope-intercept form of the line that passes through the given points. 1. (-3,4), (1,4) 2. (3, -2), (6,1)
*January 13, 2011*

**Math **

Describe a pattern in the sequence 4, 6.5, 9, 11.5 & find the next two terms of the difference.
*January 12, 2011*

**Math**

The domain of t(x) = -3.8x - 4.2 is {-3, -1.4, 0, 8}. What is the range?
*January 12, 2011*

**Math **

You earn $7.25 per hour babysitting. Write and solve an inequality to find how many full hours you must work to earn at least $200
*January 11, 2011*

**math**

What is a function rule for the perimeter P of a building with a rectangular base if the width w is two times the length l?
*January 4, 2011*

**Math**

The general gist of the question: Peter has to go to an office store, an electronics store, a clothing store, and a sporting store. There are 4 office stores, 4 electronic stores, 8 clothing stores and 5 sporting stores. How many combinations are there? Do I need to do a ...
*December 12, 2010*

**english**

What are you trying to say? It all depends on what you're trying to express. If you're answering a question "When did x happen?" you should answer "X happened when I was spoon-feeding her soup." The key here is that every sentence is a complete, ...
*December 11, 2010*

**chemistry**

146 mL of wet H2 gas is collected over water at 29.0 degrees celsius and room pressure of 750 torr. give the volume of the dry H2 gas collected at STP, give the mass of the dry H2 collected, and give the volume of the dry H2 at room conditions and the volume of H2O in the ...
*December 8, 2010*

**algebra 2**

27x^3-8=0 (difference of two cubes)
*December 6, 2010*

**bonar law**

I just want to know if when I am doing this equation, that the answer to b) is figuring out the x-intercept
*December 5, 2010*

**6grade**

5*5*2*
*December 2, 2010*

**physics**

how do you find the initial velocity and final velocity of a ball shot up and off a cliff using only the distance and max height and time
*November 11, 2010*

**English**

How did boy come into modern English
*November 4, 2010*

**Ecology**

4. B 5. D 6. C 7. D 8. B 9. B? 10. D
*October 29, 2010*

**8th grade pre algerbra**

7.5
*October 21, 2010*

**grammar**

what would be a good thesis for a Jay Z paper?
*October 19, 2010*

**Physics**

A 325 kg boat is sailing 15.0 degrees north of east at a speed of 2.00 m/s. Thirty seconds later, it is sailing 35.0 degrees north of east at a speed of 4.00 m/s. During this time three forces act on the boat: a 31.0 N force directed 15.0 degrees north of east (due to an ...
*October 14, 2010*

**Math**

Order of operations Solve: 8_2_1_3_4=5
*October 2, 2010*

**chemistry**

You have a stock solution of 14.0 . How many milliliters of this solution should you dilute to make 1350 of 0.280 ?
*October 1, 2010*

**st mags**

what are shallow places in the ocean called
*September 23, 2010*

**physics**

where do you get the equation v1²/(2a)
*September 20, 2010*

**equation**

solve graphically. x^2 + y^2 = 10 y = 3x
*September 6, 2010*

**accounting**

What is incorrect acceptance?
*July 17, 2010*

**Physics**

4.48 rad
*June 8, 2010*

**hca 210**

Wow Joey, For someone telling someone to "GROW UP!!" you sure are ignorant to the idea yourself. FYI its pocket not poket. Also, its people like you, who are killing this country. Get an education, get a good job that provides health insurance, and get off the ...
*June 6, 2010*

**Biology**

What is the target organs for Luteinizing Hormone and the Follicle Stimulating Hormone?
*April 29, 2010*

**Biology**

Hi there, I have to do a paper on Luteinizing hormone and Follicle Stimulation Hormone. Could you direct me to newspapers or journal articles discussing both hormones individually and it's relation to homeostasis. Also, what is the chemical nature of the L.H. and F.S.H. (...
*April 28, 2010*

**music**

what is one of the chief characteristis of beethovens music
*April 28, 2010*

**Global History**

Turning point of world war 2 and the causes of world war 2.
*April 11, 2010*

**social studies**

How and why are hate groups protected by the constitution?
*April 11, 2010*

**math**

Bert is planning to open a savings account that earns 1.6% simple interest yearly. He wants to earn exactly $240 in interest after 3 years. How much money should he deposit?
*March 27, 2010*

**science**

What is a result of scientific research in the field of genetics
*March 19, 2010*

**Chemistry**

How many moles of bromine are obtained from 6.75 moles of oxygen?
*March 15, 2010*

**English**

yes i did see those
*March 14, 2010*

**English**

none of that helped me
*March 14, 2010*

**English**

I need 3 themes and 4 quotes per theme for the book the bluest eye by toni morrison. i have one theme completely done. my other theme is sexual initiation and abuse, but i have no quotes for it. and i still need one more theme. help?
*March 14, 2010*

**Chemistry**

Assuming complete dissociation of the solute, how many grams of KNO_3 must be added to 275mL of water to produce a solution that freezes at -14.5C? The freezing point for pure water is 0.0 C and K_f is equal to 1.86 C. Delta T= Kf*m*i i=2 m=3.90 solvent 275=.275L Moles=1.07 ...
*February 24, 2010*

**Child Care**

You the owner of XYZ Day Care, buy a new van for your business. The van costs $20,000, all of which you borrow from First American Bank. What describes the journal entry for this transaction?
*January 9, 2010*

**math**

100x(second power) - 64y(second power)+
*December 5, 2009*

**Stats**

A manufacturer of golf equipment wishes to estimate the number of left-handed golfers. How large a sample is needed in order to be 90% confident that the sample proportion will not differ from the true proportion by more than 2%? A previous study indicates that the proportion ...
*November 28, 2009*

**social studies**

Would entertaining the british monarch be one of the U.S. presidents duties as chief of state?
*November 5, 2009*

**social studies**

would the governor of hawaii born in japan to american parents be eligible to run for president? What about an 80-year old man with only an elementary school education?
*November 5, 2009*

**6th grade**

help me get the answer that = 2 but you haave toput the right signs so it gets that number here are the numbers 17 25 30 3
*September 3, 2009*

** math 5th grade**

need to round 21,079,000 to nearest 100 thousand
*August 27, 2009*

**law**

what is the procedures of a jury trial
*May 7, 2009*

**Math (Word Problem)**

Imagine that you have just taken out a loan for one year for $4,500. What would be the simple interest on this loan if the annual percentage rate were 6.5%?
*April 19, 2009*

**math**

1.Thompson Security has been hired to determine the number of visitors at Argon Mall on a typical 10-hour day. They counted the number of people who entered the mall during three 1-hour spans on Wednesday, August 10. They entered the data into a table as shown. ï‚&#...
*February 21, 2009*

**algebra**

(3y-1) + 2y = 9 5y - 1 = 9 5y = 10 y=2 x=3(2)-1 x=5 (5,2)
*February 11, 2009*

**4th grade spelling**

i want to know about speling
*January 13, 2009*

**SEARCH AND RESCUE TRAINING**

Actually, the answer to this question is A. An individual team, such as one person and its dog, must clear the area and search through what might be hundreds of clues. However, as a TEAM the goal is the find the missing person.
*January 12, 2009*

**Math**

aflyerquacker
*January 5, 2009*

**math**

can you help me with mutiplication?
*December 22, 2008*

**Air Table**

... continued If momentum was lost in a momentu, vector diagram, it would be because not enough force was applied to the pucks on the air table?
*December 1, 2008*

**elastic collision**

Also, is it important to apply force on the mass as little as possible because it will allow the system to gain momentum?
*November 30, 2008*

**conservation of momentum**

However there was a gain of momentum in the experiment, so what would that mean, that i put too much force on the pucks?
*November 30, 2008*

**conservation of momentum**

If you have two pucks elastically collide on an air table, and then analyze the momentum vector diagram of the situation, you encounter an increase in momentum. What are possible reasons as to why there was a gain of momentum. Note: Both pucks were pushed from the end of the ...
*November 30, 2008*

**SOC**

I am having a hard time finding sources on juvenile crime (delinquency) in Chicago. Thank you
*November 24, 2008*

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