Monday

January 23, 2017
Total # Posts: 3,697

**SS**

A scientist was studying the effects of oil contamination on ocean seaweed. He thought that oil runoff from storm drains would keep seaweed from growing normally so he decided to do an experiment. He filled two tanks of equal size with water and monitored the dissolved oxygen ...

*September 22, 2015*

**chemistry**

Gaseous butane CH3CH22CH3 will react with gaseous oxygen O2 to produce gaseous carbon dioxide CO2 and gaseous water H2O . Suppose 36.0 g of butane is mixed with 41. g of oxygen. Calculate the minimum mass of butane that could be left over by the chemical reaction.

*September 21, 2015*

**Math**

thank you Ms. Sue. But how did you arrive to 13*12? can you please explain - i did not understand

*September 15, 2015*

**Math**

A group of 13 friends were planning a trip. On night before they made lot of phone calls. Each friend talked to every other friend atleast once. what is fewest phone calls that can be made?

*September 15, 2015*

**Algebra**

You improve your time running a course by 5 seconds in week one, by 3 seconds in week two, and by 4 seconds in week three. What is the average weekly change in your running time? Can anyone help me with this problem pls.. Thanks

*September 15, 2015*

**Algebra**

My answer in # 1 is 6 2. -6, +3

*September 15, 2015*

**Algebra**

1. -10+(-2)(-2)(-2)/(-3) = 6 2. Find the next two numbers in the pattern. -96,48,-24,12,... My answer 6,3

*September 15, 2015*

**physics**

Two point charges of +30μC and -10μC are separated by a distance of 10cm. What is the magnitude of electric field due to these charges at a point midway between them? (k = 9 × 109 N · m2/C2)

*September 10, 2015*

**Algebra**

Thank you so much Ms. Sue😊

*September 2, 2015*

**Algebra**

B. 33 C. Long beach, ca. Please check my answer.. Thanks

*September 2, 2015*

**Algebra**

City Highest Lowest Elevetion(ft) elevation(ft) Long Beach,Ca. 360 -7 New Orleans,Ca. 25 -8 1. The table shows the highest and lowest elevetions for two cities. A. Find the range of elevetions for Long Beach. B. Find the range of elevations for New Orleans. C. One of the ...

*September 2, 2015*

**Math**

Solve the inequality and express the solution in terms of intervals: x-2/3x+5 ≤ 4 This is how I did it: x-2/3x+5 - 4(3x+5) ≤ 0 x-2-12x-20/3x+5 ≤ 0 -11(x+2)/3x+5 ≤ 0 Can you please tell me if the answer is right and if so then how do we express the ...

*September 1, 2015*

**Physics**

Glycerin is poured into an open U-shaped tube until the height in both sides is 18 cm . Ethyl alcohol is then poured into one arm until the height of the alcohol column is 18 cm . The two liquids do not mix. What is the difference in height between the top surface of the ...

*September 1, 2015*

**chemistry**

1 A metal X that raects with metal Y in a solution of Y but does not react with Z in a solution of Z means that --------------. Metal Y is the least reactive Metal X is the least reactive Metal Z is the least reactive Metal Y and metal Z have equal reactivity 2 Oxidation can ...

*August 24, 2015*

**chemistry**

thanks for the reply, I just want to confirm my answer maybe is correct or not, just do it for me thanks

*August 24, 2015*

**Percentage**

I just got a 3% merit pay increase to my current rate of $20 an hour. How much will my hourly rate be now?

*August 21, 2015*

**Life Orientation**

In about one page describe a recent service delivery protest in your community and in neighbourhood

*August 19, 2015*

**science**

Experiments cannot validate hypotheses, only falsify them. The statement above can be restated in which of the following ways? A. Until disproved, an explanation for an observation is valid. B. Certain concepts cannot be subjected to direct experimentation. C. A hypothesis ...

*August 19, 2015*

**science**

Which of the following nitrogenous bases is found exclusively in DNA? A. Adenine B. Cytosine C. Guanine D. Thymine i think it's D

*August 19, 2015*

**science**

I think its adaptation but selection can also be considered.

*August 16, 2015*

**science**

Giraffes have long necks that allow them to reach more food sources in their habitat. The long neck trait is an example of A. selection. B. adaptation. C. radiation. D. homology.

*August 16, 2015*

**word problems**

I don't know what to do

*August 16, 2015*

**math**

A tire company manufactures 50 tires an hour with its current staff. The company can make 10 extra tires per hour for every extra worker it hires. Which of the following equations represents this relationship mathematically, with x being the number of extra workers hired and y...

*August 16, 2015*

**math**

A tire company manufactures 50 tires an hour with its current staff. The company can make 10 extra tires per hour for every extra worker it hires. Which of the following equations represents this relationship mathematically, with x being the number of extra workers hired and y...

*August 16, 2015*

**math**

Is all there is. Ms. Sue

*August 16, 2015*

**math**

Beggining balance: 1,451.50 Date credits debits 4/01 $455.10 4/01 $21.00 4/02 89.15 4/05 15.45 4/05 $50.00 4/07 $18.20. Which of the following is the balance in this account at the end of the day on April 7? A. 361.30 B. 802.60 C. 1,090.20 D. 1,812.8

*August 16, 2015*

**math**

2 5/8+ 1/3 Simplify the expression above. Which of the following is correct? A. 7 7/8 B. 1 1/7 C. 7/8 D. 8/63

*August 16, 2015*

**math**

At a used car dealership, the first determinant in the price of the car is the model, followed by the mileage and the age of the car. Which of the following is the dependent variable? A. price B. model C. mileage D. age I think its B because the model determines the price of ...

*August 16, 2015*

**advance function**

tan^2x/sin^2x=1+tan^2x

*August 10, 2015*

**Math**

how do you solve this, its about rational expressions ?? 4 2 -------- + -------- X^2–4x+1 x^2-1

*July 30, 2015*

**Math**

how do you solve this, its about rational expressions ?? 4 /X^2 – 4x+1 + 2/ x^2 -1

*July 30, 2015*

**College Psychology**

can some one explain it to me why life started in prenatal development??

*July 21, 2015*

**math**

A motorist travels 120 miles to his destination at an average speed of 60 miles per hour and returns at an average speed of 60 miles per hour and returns to the starting point at an average speed of 40 miles per hour. What is his average speed for the entire trip

*July 11, 2015*

**physics**

A ball is thrown at 22m/s at 45 degrees to the horizontal. a fence 5 feet tall is located 100 meters away. Does the ball make it over the fence?

*July 11, 2015*

**Science**

So it would be 6.4/16.05=.40 then I would do .40(-890.23)=-354.98

*July 9, 2015*

**Science**

Nevermind I realized what I needed. Thanks!

*July 9, 2015*

**Science**

I would have an answer for X, but I am confused who to approach a)

*July 9, 2015*

**Science**

The combustion of methane in a laboratory burner is represented by the following equation: CH4 + 2 O2 > CO2 + 2 H2O Given the following three thermochemical equations: C + H2 > CH4 H=-74.87kJ C + O2 > CO2 H= -393.5 2 H2 + O2 > 2 H2O H=-571.6 a) Determine the molar ...

*July 9, 2015*

**Science**

I was trying to keep sig figs. If I were trying to do it my way, I would just multiply 1.33 by 285.8 and that would get me the same answer(almost) at 380.11. Yours is 381.07

*July 9, 2015*

**Science**

would I multiply my answer from 1.3(285.8) by 2 then?

*July 9, 2015*

**Science**

The enthalpy change for the reaction 2 H2 + O2 > 2 H20 is -571.6 kJ. Determine the enthalpy change for the decomposition of 24.0g H2O. My Process -571.6 is the enthalpy of 2 mols of H2O. So the enthalpy of 1 mol of H2O will be -285.8. Since it's decomposition, -285.8 ...

*July 9, 2015*

**Science**

AHH! I accidentally put 2 mols for N2 instead of 1 I see now

*July 9, 2015*

**Science**

I got 11.8 for A and 14.15 for B

*July 9, 2015*

**Chemistry**

what does N equal? Is that the number of mols?

*July 9, 2015*

**Algebra**

Solve (log base{3} +(log_{3} x)) = -1. x =

*July 1, 2015*

**Calculus**

Ferris wheel has radius of 26m. At what rate is the rider's height increasing, when rider is 25 m from ground.

*June 21, 2015*

**english comp2**

Which thesis statement is the strongest? A. The most effective way to create jobs, in my opinion, is through government-supported programs aimed at renewing the nation’s infrastructure. B. I think the most effective way to create jobs is through government-supported ...

*June 7, 2015*

**Computers**

I don’t think piracy should be legal because people on the Internet are copyrighting other works from movies. I believe that copyright should be private of all companies that make and produce movies and shows. Piracy is theft, you’re stealing copyrighted work. You&#...

*June 4, 2015*

**cardiorespiratory fitness**

the best time to exercise is

*May 20, 2015*

**math**

how many square feet to carpet a rectangular floor that measures 24 by 19 feet?

*May 18, 2015*

**Chemistry**

For half reactions, is the equilibrium sign used? example: Zn --->Zn^2+ + 2e^- (just arrow) OR Zn <---> Zn^2+ + 2e^- (equilibrium sign)

*May 14, 2015*

**chemistry: electrochemistry unit**

The red wire on a voltmeter is the cathode and the black is the anode. This would also give a positive reading on the voltmeter. How would I explain why this is?

*May 14, 2015*

**7th of 850.000 dollars**

hi steve please help me don't now how to figure this ,--- a 7th of 850.000 dollars what would my part be thank you michael

*May 10, 2015*

**economics**

3. The following facts characterize the furniture industry in the United States:39 a. The industry has been very fragmented, so that few companies have the financial backing to make heavy investments in new technology and equipment. b. In 1998, only three U.S. furniture ...

*May 3, 2015*

**stats**

If a widget's reliability is represented by an exponential distribution with beta = 75 (weeks). What is the 50% life expectancy – e.g. the length of time where the reliability = 50%?

*April 27, 2015*

**Chemistry**

Need some direction.. where do I start? Vinegar is a 5% (mass/mass) solution of acetic acid in water. If vinegar has a density of 1.06 g/mL, what is the concentration in molar?

*April 25, 2015*

**Managerial accounting**

well, I am doing direct material budget, and already have my production budget. for example for the quarter, for January I get 950, and cost for Direct material it says to be $8/unit, but it does not say the units need for production, so im confused. normally you will multiply...

*April 22, 2015*

**math**

what the heck does it mean

*April 20, 2015*

**Science**

Use the following equation: CO(g) + 2H2 (g)= CH3OH(g) delta H = -21.7 kcal Which direction will the reaction proceed after some of the methanol vapor is condensed and removed from the reaction vessel? please help im getting so confused on the directions of the reactions

*April 16, 2015*

**science**

An increase in temperature will create what type of shift in the following equation: 2SO3 = 2SO2+ O2 delta H = +197 kJ/mol? Wouldn't it be a shift right because there is heat involved?

*April 16, 2015*

**math**

I can't figure this one. At a math contest,12 problems were given. Five points were awarded for each correct answer,and two points were deducted for each incorrect answer. Matt's score was 39.How many correct answers did he have.5-2(12-5)=39,5-24+2=39,7=63,9

*March 31, 2015*

**math**

5-2(12-5)=39 5-24+2=39 7=63 9 Am I doing this right

*March 31, 2015*

**math**

I need a formula. At a math contest,12 problems were given. Five points were awarded for each correct answer, and two points were deducted for each incorrect answer. Matt's score was 39. How many correct answer did he have

*March 31, 2015*

**Math**

There is a test with 10 questions. Each question has a choice of three answers, but only one answer is correct. How many ways are there to fill out the test? By the way, we are learning combinations and permutations

*March 30, 2015*

**Physics**

a red car and a green car move toward each other in adjacent lanes and parallel to an x axis. At time t = 0, the red car is at xr = 0 and the green car is at xg = 212 m. If the red car has a constant velocity of 23.0 km/h, the cars pass each other at x = 44.2 m. On the other ...

*March 29, 2015*

**geometry**

In quadrilateral QRTS, we have QR = 11, QS = 9, and ST=2. Sides line RQ and line ST are extended past Q and S, respectively, to meet at point P. If PS = 8 and PQ = 5, then what is RT?

*March 28, 2015*

**MATH**

Sam invested part of his 36,000 bonus in a fund that paid an 8% profit and invested the rest in stock that suffered a 5% loss find the amount of each investment if his overall net profit was 2,750

*March 26, 2015*

**Help with Psychology Homework**

6) Your textbook defines personality as

*March 24, 2015*

**physics(Please respond)**

if a rock is dropped into a well and it takes 17 seconds to hit the water how far down is the water level from the top of the well

*March 13, 2015*

**Criminal Justice**

Planned, premeditated killings of family members whose behavior is judged to have brought shame or dishonor to the family are referred to as:

*March 13, 2015*

**math**

If Benjamin drove at a constant rate, how many milesper hour did he drive?

*March 10, 2015*

**math**

Is sin function continuous?

*March 4, 2015*

**math**

dick bich

*March 3, 2015*

**Calculus I**

A spherical balloon is inflated at a rate of 10 cm^3/min. How fast does the radius change when the radius is 20 cm? Need help with set up and work through of problem.

*March 2, 2015*

**Calculus I**

Sand falls from a hopper into a conical pile with radius equal to half its height. The sand is poured at a rate of 3 m^3 each minute. How fast is the radius increasing after 10 minutes? Need help with the set up and work through of the problem.

*March 2, 2015*

**CHemistry**

What is the pH of the resulting solution when 0.20 mole of NaF and 0.05 mole HCl are added to 100 mL water? The Ka for HF is 3.95x10^-4M

*March 1, 2015*

**campbell drive**

Tickets cost $8.00 each for adults and $2.50 each for kids, and the group paid $46.50 in total. There were 6 fewer adults than kids in the group. Find the number of adults and kids on the trip. # of adults = # of kids =

*February 27, 2015*

**computers**

You have inserted an image within a paragraph of text in a Word 2007 document. You want the edges of the image to fade into the document. How do you accomplish this?

*February 25, 2015*

**science**

CAN ONE IN THEORY OR ACTUAL DEPRIVE A PARTICULAR AREA OF SPACE; 1sq mile of space of oxygen while the surrounding area of space has normal levels of oxygen?.... This question is not limited by the use of other chemicals or machinations to achieve GOAL....

*February 24, 2015*

**Math**

Stuck on solving for unknowns in part F and G help please? a) the upper loop 1 18I12+ 13I18=30 (b) the lower loop 2 =5.00I36 - 18I12= 24 (c) the node on the left side 3 I12+I36=I18 (d) Solve the node equation for I36. 4 I12 - I18 =I36 e) Using the equation found in (d), ...

*February 23, 2015*

**physics**

Stuck on solving for unknowns in part F and G help please? a) the upper loop 1 18I12+ 13I18=30 (b) the lower loop 2 =5.00I36 - 18I12= 24 (c) the node on the left side 3 I12+I36=I18 (d) Solve the node equation for I36. 4 I12 - I18 =I36 e) Using the equation found in (d), ...

*February 23, 2015*

**physics(waves)**

convert your milliseconds 0.28 into seconds first then do as you done. Converting will give you .28x10^-3

*February 23, 2015*

**physics**

Three identical charges (q =4.3 µC)lie along a circle of radius 1.9 m at angles of 30°, 150°, and 270°, as shown in the figure below. What is the electric field at the center of the circle? I THOUGHT IT WOULD BE ZERO BUT MY PROF TELLS ME THAT'S WRONG WHY?

*February 18, 2015*

**water dynamics**

a projectile 20ft in lentgh 4-6 thousand lbs traveling @ 100mph @ 100ft below water surface can be stopped and/or have said projectile change its course by using how many pounds of water preasuure to achieve goal? And what are the approximate dimensions of water preassure ...

*February 11, 2015*

**Math**

40 degrees

*February 9, 2015*

**Chemistry**

No because i have no idea where your "answer below" is

*February 6, 2015*

**Chemistry**

A tetrahedral site in a close-packed lattice is formed by four spheres at the corners of a regular tetrahedron. This is equivalent to placing the spheres at alternate corners of a cube. In such a close-packed arrangement the spheres are in contact and if the spheres have a ...

*February 6, 2015*

**Chemistry**

A tetrahedral site in a close-packed lattice is formed by four spheres at the corners of a regular tetrahedron. This is equivalent to placing the spheres at alternate corners of a cube. In such a close-packed arrangement the spheres are in contact and if the spheres have a ...

*February 6, 2015*

**Chemistry**

Soo, can you walk through the problem w final answer?

*February 6, 2015*

**computer**

You want somebody to code that for you, something that can take a few hours. Ask what you need help in coding inside the code, also show your coding. Start with a name. You typed a paragraph and want something the size of an essay.

*February 3, 2015*

**chem**

what would the temperature inside the pressure cooker beef the vapor pressure of water inside the cooker was 3.08 atm

*February 2, 2015*

**chem**

what would the temperature inside the pressure cooker beif the vapor pressur of water inside the cooker was 3.08 atm

*February 2, 2015*

**physics**

A small block with mass 0.308 kg is sliding down a frictionless ramp that is inclined at an angle of 53.1° above the horizontal. Assume g = 9.80 m/s2. (a) As the object slides down the incline, what is the magnitude of the normal force that the surface of the incline ...

*February 2, 2015*

**physics**

A small block is released from rest at the top of a frictionless incline. The distance from the top of the incline to the bottom, measured along the incline, is 3.70 m. The vertical distance from the top of the incline to the bottom is 1.67 m. If g = 9.80 m/s2, what is the ...

*February 1, 2015*

**Physics**

an aircraft lands on a runway with length of 205 m at a speed of 295 km/h what is the minimum constant deceleration required for a safe landing

*January 28, 2015*

**Biology**

I'm trying to find out how regular cells are similar to cancer cells? I have read the chapter 2 times already and the only thing I can come up with is they both divide to make new cells.

*January 28, 2015*

**chemistry**

a 1.00*10^1 mL sample of an unknown liquid has a mass of 7.99 g. Calculate the density of the liquid using the proper number significant figures

*January 28, 2015*

**Science**

Is the gene for sickle cell anemia more likely to be dominant or recessive?

*January 21, 2015*

**Chemistry**

The reaction of sodium hydrogen carbonate (baking soda), NaHCO3 and vinegar is a safe and effective method of opening a clogged drain a) Write the chemical equation for this reaction b) Explain why using sodium hydrogen carbonate and vinegar may be a greater alternative to ...

*January 11, 2015*

**programming**

Your funny, too much code. Learn basic coding before trying to ask to hack. It is like applying for NASA while in elementary school.

*December 17, 2014*