Sunday

September 25, 2016
Total # Posts: 111

**Math**

In middle school computer club, 3/8 of the members are girls. Of the girls in the club, 2/5 are 6th-graders. Write and solve an equation to find the fraction of the members of the club that are 6th-grade girls.

*March 29, 2016*

**math**

the top of a bridge tower needs new lights. the lights along the perimeter of the tower's top has an area of 65 sq. meters it has a width or 5meters. what is the perimeter of the top tower?

*January 31, 2016*

**ECONOMICS HELP!!!**

Ms. Sue, just by explaining all this I don't get it. Ofcourse without giving me the answer.

*January 19, 2016*

**ECONOMICS HELP!!!**

Due tomowrow and need help on these questions: 1. Explain Marx’s labor theory of value. 2. Why do you think that most economies are mixed economies instead of purely capitalist or purely socialist economies? 3. Choose a current economic issue or policy measure and then ...

*January 19, 2016*

**ECONOMICS HELP!!!**

I need some help because its due tomorrow. And these are the questions: 3. According to economists, almost everything we do, has costs and benefits. Identify the costs and benefits of each of the following: going to the dentist for a checkup, doing your homework, and getting ...

*January 14, 2016*

**Economics HELP!!!**

I need some help because its due tomorrow. And these are the questions: 3. According to economists, almost everything we do, has costs and benefits. Identify the costs and benefits of each of the following: going to the dentist for a checkup, doing your homework, and getting ...

*January 13, 2016*

**Math**

In a school orchestra, 2/5 of the students are string players. Of the string players, 5/8 are girls. What fraction of all the students in the orchestra are girls who play string instruments.

*January 4, 2016*

**math**

one bottle of shampoo costs $6 for 8 ounces.A second bottle costs $4 for 5 ounces of shampoo.Which has the lower unit rate?How much lower?

*October 20, 2015*

**reading**

prefix is con

*September 22, 2015*

**Chemistry**

A buffer is made by mixing 100 mL of 0.25 M acetic acid (CH3COOH) and 150 mL of 0.10 M sodium acetate (CH3COONa). Calculate the pH of the solution after 0.5g of solid NaOH is added to the solution (Given Ka (CH3COOH) =1.8 x 10-5)

*August 19, 2015*

**Pre Calculus**

a biologist has three salt solutions: some 5% solution, some 15% solution, and some 25% solution. She needs to mix some of each to get 50 liters of 20% solution. She wants to use twice as much of the 5% solution as the 15% solution. How much of each solution should she use? I...

*June 10, 2015*

**Math**

Ms.Groves has trays of paint for students in our class each tray has five colors one of the colors of purple what fraction of the colors in 20 trays of purple

*January 21, 2015*

**pre algebra help**

9. how you would convert the repeating, non terminating decimal to a fraction? explain the process as you solve the problem. 0.1515 I dont understand this question can someone help explain this?

*September 21, 2014*

**Math/Algb**

steve can you help me with the previous one. Ms.Sue tried to answer it but it still didn't help me THANKYOU!

*September 3, 2014*

**Math. Help Thanks!**

THankyou Mr.Steve!

*September 3, 2014*

**Math. Help Thanks!**

But Ms.Sue I need help with 2 and 3 please

*September 3, 2014*

**Math. Help Thanks!**

Hot dogs and Hamburgers: 1.) The caterer for your class picnic charges $1 for each hotdog and $2 for each hamburger. You have $48 to spend. Write a model that shows the different numbers of hot dogs and hamburgers that you could purchase... 2.) Airplane landing: An Airplane&#...

*September 3, 2014*

**algebra**

How do you solve -5(a-2)-2

*July 22, 2014*

**Science**

An oxygen ion has 8 protons and 6 electrons. What is its charge in coulombs?

*May 28, 2014*

**Trig 2**

hi guys XD

*May 13, 2014*

**Math**

The Puzzle: Here is a famous prize problem that Sam Loyd issued in 1882, offering $1000 as a prize for the best answer showing how to arrange the seven figures and the eight 'dots' .4.5.6.7.8.9.0. which would add up to 82

*April 30, 2014*

**math**

a quadrilateral has angles measuring 27, 56, and 80. what does the fourth angle measure?

*January 29, 2014*

**Physics**

An antiproton (same mass as the proton, charge -e) is at the observation location. What is the force on the antiproton, due to the π-?

*January 16, 2014*

**Phyics**

A π- ("pi-minus") particle, which has charge -e, is at location ‹ 3.00e10-9, -2.00e10-9, -3.00e10-9› m. What is the electric field at location < -3.00e10-9, 3.00e10-9, 4.00e10-9> m, due to the π- particle?

*January 16, 2014*

**physics**

A package of mass 9 kg sits at the equator of an airless asteroid of mass 4.0 1020 kg and radius 4.9 105 m. We want to launch the package in such a way that it will never come back, and when it is very far from the asteroid it will be traveling with speed 185 m/s. We have a ...

*November 1, 2013*

**trigonometry**

If sin 57=m then express the following questions 1. Sin 237 2. cos 33 3. cos 3 4. cos 66

*May 19, 2013*

**Chemistry**

Explain, not just describe, the relationship between these rankings. Most reactive to least reactive metals: Zn, Pb, Cu, Ag Most reactive to least reactive metal cations: Ag, Cu, Pb, Zn

*May 7, 2013*

**Chemistry equation**

Write a correctly balanced series of chemical equations to describe the stepwise protonation of carbonate ion. Na2CO3 with HCl

*April 9, 2013*

**Chemistry eq**

How many milliliters of 0.430M hydrochloric acid (HCl(aq)) must be added to 15.00mL of 0.682M sodium hydroxide (NaOH(aq)) to reach the equivalence point?

*March 27, 2013*

**Chemistry eq**

How many milliliters of 0.430M hydrochloric acid (HCl(aq)) must be added to 15.00mL of 0.682M sodium hydroxide (NaOH(aq)) to reach the equivalence point?

*March 27, 2013*

**Chemistry titrations**

25.00mL of an unknown sulfuric acid solution is titrated to the second equivalence point with 21.02mL of 0.420M potassium hydroxide solution. What is the concentration of the sulfuric acid solution?

*March 27, 2013*

**Chemistry**

How many mols of OH-(aq) ions are present in 20.33mL of 1.33M sodium hydroxide solution?

*March 6, 2013*

**Chemistry**

How many mols of tyrosinate ions (C9H10NO3-(aq)) are present in 909mg of sodium tyrosinate solid (NaC9H10NO3)?

*March 6, 2013*

**Chemistry**

What is the difference between a forward and a reverse reaction? I am studying Lechatelier's principal and it states that with an increase in temperature it favors a reverse reaction and when the temperature decreases it favors a forward reaction. What does this mean exactly?

*March 3, 2013*

**chemistry concentrations**

You have combined the following: 7.92mL of 1.122M Fe(NO3)3(aq), 5.02mL of 1.849M NaCl(aq), and 7.09mL of water. What is the concentration of chloride ions in the resulting solution? Assume liquid volumes are additive

*February 20, 2013*

**Chemistry**

The dye molecule 7-aminocoumarin has an extinction coefficient of 2800M-1cm-1 at 432nm. An aqueous sample of 7-aminocoumarin is placed in a cuvette with a 1.00cm path length and the absorbance is found to be 1.75 at 432nm. What is the molarity of 7-aminocoumarin in this sample?

*February 20, 2013*

**Calculus **

F(x) = -6x^8 F'(x)= y= 7e^x + 2 y' =

*February 20, 2013*

**Chemistry **

Which are within 10% of 4.63mins? 4.13 5.28 5.02 4.23

*February 6, 2013*

**Chemistry**

What is the concentration of methanol in a solution prepared by combining 7.85mL of a 3.693M methanol solution with 17.50mL of water? Assume volumes are additive and report your answer to 3 decimal places.

*February 6, 2013*

**Chemistry**

If the freezing point of pure toluene is -95.15 oC and its freezing point depression constant is -8.38 oC/molal, what is the freezing point of a solution made by dissolving 39.338g of anthracene (C14H10) in 150.0mL of toluene? (Density of toluene = 0.8669g/mL)

*January 30, 2013*

**Math**

write 3 different ones.numbers you could add to where you need to regroup to find the sum

*January 29, 2013*

**Chemistry**

Can you explain how to convert mols of each of the reactants to mols of Ca3(PO4)2 more please?

*January 22, 2013*

**Chemistry**

How many grams of calcium phosphate (precipitate) could be produced by combining 12.096g of calcium nitrate dissolved in water with 16.498g of rubidium phosphate dissolved in water? Report your answer to 3 decimal places.

*January 22, 2013*

**Chemistry**

How many grams of calcium phosphate (precipitate) could be produced by combining 12.443g of calcium nitrate dissolved in water with 16.083g of rubidium phosphate dissolved in water? Report your answer to 3 decimal places.

*January 22, 2013*

**Physics**

Andre at 60 kg, hits the trampoline after falling from 4 meters. The trampoline stretches 0.6 meters and andre stops in 0.3 seconds.What is the force constant of the trampoline?

*December 6, 2012*

**3rd grade math**

Well, if you subtract by adding, you count in your head how many numbers are between 36 and 71. For example.. 80-50, there are 30 numbers in between 50 and 80 and 80-50=30.. If its easier.. try taking away one number in your equation and making them even.. like 70 - 35 and ...

*September 20, 2012*

**algebra**

can't figure it out yet let me know how it goes

*July 28, 2012*

**world history**

Alexander the great reject Darius is P settlement of all lands west of euphrates river

*December 13, 2011*

**math**

Jan had 22 3/4 feet of ribbon. To make bows, she cuts it into pieces that are 1 2/3 feet long. How many bows will she be able to make?

*November 8, 2011*

**business**

five secific events that can be expected to cause the equilibrium price of a good to increase?

*July 6, 2011*

** algebra**

perform the indicated operation and simplify: 3x+6 x^2-4 ----- divided by ----- 4x+12 x-3

*June 4, 2011*

**physics**

I know that 1 micro-coulomb is 1*10^-6 coulombs and 1 electron has 1.60217646 * 10-19 coulombs. I'm not sure if you have to divide or multiply them? And don't you need the mass of the carpet to do it? My answers on true/false; False, it does depend on the magnitude of ...

*January 10, 2011*

**physics**

You pick up a charge of one micro-Coulomb while walking over carpet, how many electrons were transferred? (Order of magnitude only) TRUE OR FALSE: If a third charge is released in the middle between the two positive charges, independent of the magnitude of the charges, it will...

*January 10, 2011*

**4th grade**

what grade are all of you in like high school or collage you know i never got math intil now . do any of you like math?

*September 13, 2010*

**4th grade**

which of the 5 regions contain rich farmland in Arkansas and Louisiana created by Mississippi and Red Rivers?

*August 18, 2010*

**Chemistry**

Assuming complete dissociation of the solute, how many grams of KNO3 must be added to 275 mL of water to produce a solution that freezes at -14.5 C? The freezing point for pure water is 0.0 C and Kf is equal to 1.86 C/m. * Use Tf = Kf*i*m

*May 28, 2010*

**government**

why isnt there a political party dedicated to labor class in the U.S? a. proves politicians arent concerned about serving working class. b. result of govt restrictions on political activities of labor unions c. reflects diffictulties in unifying a party on single issue winner ...

*May 1, 2010*

**government**

what can political parties handle better than interest groups? a. raising money b. provide solidary benefits c. create a cleare ideology d. organize people on a large scale

*April 24, 2010*

**question of the day at my school**

Welsey W. south

*February 18, 2010*

**question of the day at my school**

Who was the host of AM chicago in 1963?

*February 18, 2010*

**science**

thank you

*February 15, 2010*

**science**

Why are models useful? a) models work exactly like the things they present b) Models are the first stage in any experiment c) models are better than charts or graphs d) models are the first step in creating a prototype

*February 15, 2010*

**sciencew**

Yes, I copied it correctly. Water is nonliving because it cannot make itself move. Thank you Ms. Sue

*February 15, 2010*

**sciencew**

Scientists know that water is nonliving because a) it gets energy from food b) it reproduces itself c) it responds to its environment d) it cannot make itself move Is d the answer?

*February 15, 2010*

**science**

Scientists know that water is nonliving because a) it gets energy from food b) it reproduces itself c) it responds to its environment d) it cannot make itself move I think letter c but I'm uncertain. Thanks

*February 15, 2010*

**science**

Thanks Dr.Bob222

*February 10, 2010*

**science**

One of Darren's model cars keeps rolling off its track. The other cars stays on the track. What should he do? a) change the shape of the track b)study the wheels of the car that will not stay on the track c)change the tires on all of the cars d)build a model of the cars ...

*February 10, 2010*

**science**

Thank you Lori and Nadia

*February 10, 2010*

**science**

Question 1: Candance is trying to explain that a dog is a living thing, but a river is not. What is one difference that will help her show this? a)a river cannot make another river b)both the dog and the river can move c)a river can be made by people, but the dog can only be ...

*February 10, 2010*

**government**

thanks

*February 4, 2010*

**government**

do republicans think the government is too strong or too weak?

*February 4, 2010*

**Calculus**

annnnd.... a)1/2pi b) 10pi c) 24pi d) 54pi e) 108pi

*November 17, 2009*

**Calculus**

The volume of a cone of radius r and height h is given by V=1/3pir^2h. If the radius and the height both increase at a constant rate of 1/2 centimeter per second, at what rate, in cubic centimeters per second, is the volume increasing when the height is 9 centimeter and the ...

*November 17, 2009*

**Math**

Thanks Ms. Sue!

*November 8, 2009*

**Math**

Are these correct? two more than a number and four = 2 + n + 4 ten more than a number plus 3 = n + 10 + 3 three increased by a number minus 5 = n + 3 - 5 six and a number decreased by 7 = n+6-7

*November 8, 2009*

**Math**

Thanks Ms. Sue, that's what I thought but I was not sure.

*November 8, 2009*

**Math**

Directions: Write an expression for each of the following. Use n for the unknown number Questions: four less than a number a number increased by the same number I am confused, thanks!

*November 8, 2009*

**Science**

THANK YOU DR. BOB222

*September 28, 2009*

**Science**

What do simple machines do? I can't unscramble these letters to get the answer: pldkwoohsrue

*September 28, 2009*

**biology**

thanks

*September 9, 2009*

**biology**

why has surprisingly little use been made of distillation of seawater as a source of driking water in arid areas?

*September 9, 2009*

**chemistry**

How many grams are there in 25 moles of sodium oxalate? Please explain step by step. I'm confused.

*July 28, 2009*

**physics**

thanks

*April 22, 2009*

**physics**

please help with either or both 1. a charge of 10C is passing in 2 second through a cross sectional area of a conductor. calculate the intensity of magnetic field at a distance of 10 cm from the conductor. 2. An amount of 3X10^20 electrons is passing in a conductor in 2 ms. ...

*April 22, 2009*

**physics HELP**

is it D?

*March 10, 2009*

**physics HELP**

which unit is equivalent to meters per second? a. hz*s b. hz*m c. s/hz d. m/hz

*March 10, 2009*

**physics**

bluelight wavelength in vacuum 480nm, index of refraction is 1.6 what is the index of refraction in vacuum?

*March 9, 2009*

**trig**

how do i solve tan(165) and sin(285)

*February 26, 2009*

**1st grade social studies**

cultural/heritage

*February 16, 2009*

**physics**

im talking about sound waves

*February 12, 2009*

**physics**

1.if frequency increases twice, how it change the energy carried by one pulse? (It may have no effect) 2. if the humidity of the air increased, what quantities will be affected: frequency, period, speed, and wavelength

*February 12, 2009*

**physics**

oooh...sorry I meant to write 89.0 dB

*February 11, 2009*

**physics**

a very loud train whistle has an acoustic power output of 100 W. if the sound energy spreads our spherically, what is the intensity level in dB at a distance of 100 meters from the train? I0=10^(-12) the answer is 200 m but how do i get it?

*February 11, 2009*

**Math**

Can someone check my answers for me pls? True or False LCM of 10 and 18 is 180; False LCM of 8 and 30 is 120; True LCM of 3 and 4 is 12; True LCM of 42 and 28 is 168; True LCM of 9 and 15 is 45; True

*December 5, 2008*

**Physics**

A 0.145-kg ball, moving in the positive direction at 13 m/s, is acted on by the impulse. What is the ball's speed at 4.0 seconds?

*December 1, 2008*

**math**

simplify the expression sqrt(5/3)

*November 4, 2008*

**Algebra2**

Can someone check my answer for me. List all the possible rational zeros of f(x)= 3x^5-7x^3+2x-15 p=15 1,3,5,15 q=3 1,3 answer: 1,3,5,15,1/3,1/5,3/5

*April 13, 2008*

**Chemistry**

How do I find the total vapor pressure of a solution of benzene (mole fraction 0.350, vapor pressure at 25 degrees = 12.7 kPa) in toluene at 25 degrees. (vapor pressure of toluene at 25 degrees = 3.79 kPa)

*December 19, 2007*

**math (sales tax)**

A necklace from Target costs $3.75. The sales tax rate is 5.75%. What is the total cost?

*September 22, 2007*