Wednesday

February 22, 2017
Total # Posts: 665

**chemistry**

1) A Galvanic cell runs on the following reaction: Co (s) + Cu2+ (aq) ? Co2+ (aq) + Cu (s) Draw a diagram for this Galvanic cell, labeling the electron flow, the anode and cathode, and the positive and negative sides of the Galvanic cell. 2) A Galvanic cell runs on the ...

*January 25, 2017*

**math**

vol of wood= 3*20*120=7200cm3 density of wood= M/V=8000/7200=1.111g/cm3 density of water=1030/1000cm3=1.03g/cm3 so no the wood will not float as it has more density then water

*January 3, 2017*

**Social Studies *Check Answers***

Thanks, I changed the second answer to B and got them both right. :)

*December 11, 2016*

**Social Studies *Check Answers***

Anyone mind checking these 2 quiz answers please? Which statement best explains why nation-states write constitutions? A: Constitutions give citizens unlimited powers. B: Constitutions establish nation-states. C: Constitutions allow governments to elect leaders D: ...

*December 11, 2016*

**Math**

On Aug 14th, One of our Partner's ( Compuville ) cash book showed a debit balance of $4,000.00. His bank statement showed a balance of $4,270.00. On comparison the following were found: * check issued amounting to $2,500.00 has not been cashed * The bank rejected checks ...

*September 30, 2016*

**math**

Nilsa converted 1/12 to a repaeting decimal and wrote 0.083 as her answer what error did she make

*September 3, 2016*

**Calculus**

Thank you so much! ^^

*August 16, 2016*

**Calculus**

Hi, could you help me with this one please? Evaluate ∫sin(x)cos^2(x)dx by using the substitution u=sinx Ive done this by using u=cosx no problem but can't get this one :( Thank you so much in advance!

*August 16, 2016*

**fedreal government**

Which of the following statements about the Articles of Confederation is UNTRUE? a. It was the second official constitution used to govern America b. It was the first official constitution used to govern America c. Power was too decentralized d. It established a loose league ...

*August 11, 2016*

**Add Math**

the variable point P(x, y) moves so that it is the same distance from the points (1,6) and (3, 2). The equation of the locus of P may be obtained by?

*June 2, 2016*

**math**

a room measures 22 feet by 28 feet. They are covering the floor with square tiles that measure 1 foot on a side and cost $0.89 each. How much will they spend on the tile?

*May 16, 2016*

**Math**

4x^2(2x^3 – 5x +6)

*May 10, 2016*

**Math**

a regular plot of land is designed so that its length is 6 meters more than its width. the diagonal of the land is 10 meters. to the nearest tenth of a meter, what are the dimensions of the land?

*May 6, 2016*

**Math**

Marissa bought 2 1/4 gallons of orange juice to make punch. How many qts of oj did she buy? Marissa bought 6 fewer pints of soda than oj. How many cups of soda did she buy?

*May 2, 2016*

**College Algebra (pt.3)**

I did indeed. Thank you again for helping me out! Have a great night!

*April 28, 2016*

**College Algebra (pt.3)**

Alright, this is a bonus question on my homework. I think I did it wrong... How long will it take for an investment of $1000 to grow to $1750 if interest is compounded continuously at a rate of 8%? Round to the nearest tenth. A=Pe^rt $1750=$1083.38 divided ans= 1.62

*April 28, 2016*

**College Algebra (pt.2)**

Thank you again for your help! I thought it was seeming a little too easy for me to be doing it correctly.

*April 28, 2016*

**College Algebra (pt.2)**

Hey, I would love if someone could please look over my answers. I just learned this yesterday and want to make sure I did my hw correct. Thanks!!! Solve for x. Round answers to four decimal places where appropriate: 6. ln(5x-3)=0 ans= x=3/5 7. log5^x=3 ans= x^3=5 8. log2^32=x ...

*April 28, 2016*

**College Algebra**

Steve! Thank you so much! I was way off! I'll be practicing more.

*April 28, 2016*

**College Algebra**

Hey, I would love if someone could please look over my answers. I just learned this yesterday and want to make sure I did my hw correct. Thanks!!! Solve for x. Round answers to four decimal places where appropriate: 1. 6^x=6^2x-1 Ans.= x=1 2. 3^x=1/27 Ans.= x=-9 3. e^3x=10 Ans...

*April 28, 2016*

**science**

Sure! No problem👻

*April 13, 2016*

**science**

True, but I think the answer that makes the most sense is "create a family safety plan". Even though the storm would be over, this could still be helpful. It's always best to consult your family before making independent desicion a that may compromise your safety...

*April 13, 2016*

**science**

It's hard to say, because a few of these answers could potentially be correct. It depends on what your teacher has been teaching you during class, but I think that the most logical answer is "create a family safety plan".

*April 13, 2016*

**Math**

Two transparencies, both 8.5 inches by 11 inches, were folded and taped to make cylinders. Prove mathematically, that they have the same volumes

*April 2, 2016*

**College Algebra/pre-calculus**

The Pointless Pencil Company purchases a new stamping machine for the production line that cost $8000. The equipment will be replaced in 10 years at which time its salvage value is expected to be $1000. Write a linear equation giving the value, y, of the machine during the ...

*March 31, 2016*

**Math**

What are 2 ways to arrange 300 chairs so that there are the same number of chairs in each row?

*March 9, 2016*

**Math**

A farmer wants to construct a pen with 100 feet of fencing. The pen will be divided into two areas as shown below. Find the maximum dimensions of the big pen. All I have so far is that 3x+2y=100. I am not sure how to move forward.

*February 21, 2016*

**algebra 1**

does 4x+5y=0 represent a direct variation? if so, find the constant of variation. complete the steps to solve 4x+5y=0 for y.

*February 18, 2016*

**physics**

What potential difference is required to reduce the initial speed of the proton by a factor of 2? A proton has an initial speed of 3.1×105 m/s .

*February 3, 2016*

**Math**

Sarah made a square tablecloth and wants to put lace around the edges. The length of one side of the tablecloth is 56 inches. How much lace will Sarah need?

*February 2, 2016*

**ONE math question! Check please, thank you!**

Correct!!

*February 1, 2016*

**algebra 1**

a bout travels 280 miles downstream and back. The trip downstream took seven hours. The trip back took 14 hours. The speed of the boat in still water and the speed of the current

*January 13, 2016*

**science help**

I think "c" is the best answer :)

*December 17, 2015*

**Physics**

google search the first part of the equations i have it up with the picture

*December 11, 2015*

**Physics**

A woman holds a 1.90-m-long uniform 5.0-kg pole as shown in (Figure 1) ( its horizontal). A. Determine the force she must exert on the pole at A. Express your answer to two significant figures and include the appropriate units. Enter positive value if the force is upward and ...

*December 11, 2015*

**English**

Its not d

*December 2, 2015*

**English**

Thank you

*December 2, 2015*

**English**

In the sentence "There comes a time when the cup of endurance runs over, and men are no longer willing to be plunged into an abyss of injustice," the bolded phrase creates a mood of __________ among the audience A.Panic B.Despair C.Anger D.Anticipation

*December 2, 2015*

**Math**

A.625-465=$160 he has to pay for 2 days=160 $ rent paid for 1 day=260/2=$80 amount paid for 5days=8*5=$400 But he paid $465 Difference 465-400=$65 so every one has to pay $65+rent for the no. of days total rent for x days y=65+80 x (dollars) B. f(x)=65+80 x

*November 25, 2015*

**Math**

Is |5|and |-5|equal? Its really hard to figure out.

*November 3, 2015*

**chemistry**

If 6.30 moles of C5H12 reacts with excess O2, how many moles of CO2 will be produced in the following combustion reaction?

*October 15, 2015*

**Applying Rational Number Operations**

Do u think that is going to help Ruby no offense I just really need help

*October 7, 2015*

**Applying Rational Number Operations**

HELP PLEASE

*October 7, 2015*

**Applying Rational Number Operations**

(7th grade regular math) One half liter of lemonade concentrate is added to 3 liters of water. How many 1/3-liters serving are made? How would you do the math for this question? Please help I really need this question answered

*October 7, 2015*

**chemistry**

Thanks

*September 29, 2015*

**chemistry**

Write potassium sulphate +barium nitrate ¨ potassium nitrate + barium sulphate as a balanced symbol equation

*September 29, 2015*

**math help needed!**

Estimate the instantaneous rate of change of the function f(x) = x ln x at x = 1 and at x = 3. (Use h = 0.1, 0.01, 0.001, 0.0001, and so on. Round your answers to four decimal places.)

*September 17, 2015*

**math**

Find the derivative algebraically. g(t) = t^2 + t at t = −1 I can't seem to start this problem correctly. What is the process required for this question?

*September 16, 2015*

**math please help me!**

This is what I have done so far for part a: I plugged in h = 0.01 got f'(1) = 1.004983416 h= 0.001, which equals 1.0049 h = 0.0001, and got 1.000049998 h = 0.00001 and got 1.000005 h 0.000001 and got 0. I tried putting in 1.0049, 1.0050, and 0.0000 in but none of those ...

*September 16, 2015*

**math please help me!**

Estimate the instantaneous rate of change of the function f(x) = x ln x at x = 1 and at x = 3. (Use h = 0.1, 0.01, 0.001, 0.0001, and so on. Round your answers to four decimal places.) f '(1) = f '(3) = What do these values suggest about the concavity of ...

*September 16, 2015*

**math help please!**

Nevermind, I got it! I just needed to zoom out more on my graph.

*September 8, 2015*

**math help please!**

I got zero for part a by plugging the function into a calculator but I still do not get part b.

*September 8, 2015*

**math help please!**

Assuming that limits as x → ∞ have the properties for limits as x → c, use algebraic manipulations to evaluate lim x → ∞ for the function. a. f(x) = x − 2/2 + 6x^2 b. f(x) = x^2 + 6/x + 7 Please help! I do not know how to start with this ...

*September 8, 2015*

**math/physics**

Wait nevermind! I got it! Thank you so much!

*September 7, 2015*

**math/physics**

How do you find the vertex? Do you just put it into a graphing calculator?

*September 7, 2015*

**math/physics**

A pomegranate is thrown from ground level straight up into the air at time t = 0 with velocity 96 feet per second. Its height at time t seconds is f(t) = −16t2 + 96t. a) Find the time it hits the ground. t=? s b) Find the time it reaches its highest point. t=?s c) What ...

*September 7, 2015*

**math**

Thank you so much! I missed the negative part about the term which definitely impacted the answer.

*September 7, 2015*

**math**

Determine the end behavior of the function as x → +∞ and as x → −∞. f(x) = 1000 − 39x + 51x^2 − 10x^3 As x → +∞, f(x) → ???? . As x → −∞, f(x) → ??? I know that the end behavior of the function...

*September 7, 2015*

**math please help!!**

Thank you so much! That helped a lot!

*September 3, 2015*

**math please help!!**

The depth d of water in a tank oscillates sinusoidally once every 4 hours. If the smallest depth is 7.9 feet and the largest depth is 10.1 feet, find a possible formula for the depth in terms of time t in hours. (Let the water depth be at the average when t = 0.) I got y=1....

*September 3, 2015*

**math**

thank you!!!! I did mess up the period. I didn't think about it that way. Thank you so much!

*September 2, 2015*

**math**

The desert temperature, H, oscillates daily between 36°F at 4 am and 56°F at 4 pm. Write a possible formula for H in terms of t, measured in hours from 4 am. I thought the answer is -10cos(1/6pi times t) +46 but it got marked wrong. I thought that the amplitude is 10 ...

*September 2, 2015*

**math! please help!**

Thank you so much!! That really helped!

*September 2, 2015*

**math! please help!**

For a boat to float in a tidal bay, the water must be at least 2.7 meters deep. The depth of the water around the boat, d(t), in meters, where t is measured in hours since midnight, is d(t) = 5 + 4.6 sin(0.5t). (a) What is the period of the tides in hours? (Round your answer ...

*September 2, 2015*

**Math**

A banquet hall has 22 tables for 4 and 15 tables for 6 ,but 3 chairs are missing from the tables .How many many chairs will there be if 134 are seated

*August 31, 2015*

**math**

If you have to find f(t)g(t) where f(x) = 2/x and g(x) = 4x+2 I got 2/t times 4t+2 and then from that I got 8t+4/t. How do I simplify that further?

*August 31, 2015*

**math**

Just kidding! I got it!

*August 31, 2015*

**math**

Find f(g(x)) where f(x) = 2/x and g(x) = 4x+2 I got till 2/(4x+2) but am not sure where to go from there. Please help!

*August 31, 2015*

**math**

For the data I gave above, we need to find a formula for the exponential function. I got b to be 605. That part is right at least, right? Because of how 605 = b times a^0 which means b equals 605. (0 because the 605 matches up with sea level in the data--I posted it weirdly) ...

*August 30, 2015*

**math**

How did you get the 0.0000917? I plugged log(1.096) divided by 1000 and got 3.98 times 10 to the -5.

*August 30, 2015*

**math**

For example, when I try to solve an equation like 1.096 = a^1000, what should I do? I'm trying to find a formula for this set of data and that's how I got the above equation: d=??? Elevation (ft) Sea level labeled h 1000 2000 3000 4000 Takeoff roll (ft) labeled d 605 ...

*August 30, 2015*

**math**

Thank you! I forgot that you could divide the two!

*August 30, 2015*

**math**

Given an exponential graph that are concave up and the points (1,4) and (-1, 16), give a possible formula of the function. I plugged the variables into the f(x)=b times a^x and got: 4= b times a^1 and 16=b times a^-1 I am not sure where to go from here.

*August 30, 2015*

**math**

Thank you so much for all of your help!

*August 28, 2015*

**math**

A town has a population of 2000 people at time t = 0. In each of the following cases, write a formula for the population, P, of the town as a function of year t. (a) The population increases by 60 people per year. I thought it would be P= 2000 (1.03)^t (b) The population ...

*August 28, 2015*

**Math**

Wow, you're a genius! Thank you so much, that worked! I didn't even think about involving the quadratic equation! Thank you again!

*August 27, 2015*

**Math**

For better clarification, the first part to this problem had (0,2) instead of (0,b) and the answer came out to be (-2,4). I kind of guess and checked for that question.

*August 27, 2015*

**Math**

Consider the functions in the figure below. Find the coordinates of C in terms of b. So there are two functions. There is the y=x^2 u-shape and then a line in the middle of it with points (0,b) and (1,1) in that order from left to right. Farther to the left of point (0,b) is ...

*August 27, 2015*

**math**

Thank you so much! That worked!

*August 27, 2015*

**math**

I posted this question yesterday and I was told I was correct but for some reason the online hw website will not take it.

*August 27, 2015*

**math**

For tax purposes, you may have to report the value of your assets, such as cars or refrigerators. The value you report drops with time. "Straight-line depreciation" assumes that the value is a linear function of time. If a $1020 refrigerator depreciates completely in...

*August 27, 2015*

**math**

Thank you so much! That really helps. I totally forgot that the range would have to be over 9 due to the plus 9 in the equation.

*August 27, 2015*

**math**

Find the domain and range for y=x^2+9. Is the answer all real numbers? How would you enter that in interval notation? From Googling the definition of real numbers, I now understand that the infinity sign would not be included. For a continuous function you use closed brackets...

*August 27, 2015*

**Math (functions)**

Thank you!

*August 26, 2015*

**Math (functions)**

For tax purposes, you may have to report the value of your assets, such as cars or refrigerators. The value you report drops with time. "Straight-line depreciation" assumes that the value is a linear function of time. If a $1020 refrigerator depreciates completely in...

*August 26, 2015*

**chemistry**

Arrange the following aqueous solutions in order of decreasing freezing points (lowest to highest temperature): 0.10 m Na3PO4, 0.35 m NaCl, 0.20 m MgCl, 0.15 m C6H12O6 and 0.15 m CH3COOH.

*July 20, 2015*

**Physics**

M1 = 45.0 kg is a spherical mass at the origin. M2 = 16.6 kg is also a spherical mass, and is located on the x-axis at x = 78.0 m. At what value of x would a third mass M3 = 15.5 kg experience no net gravitational force due to M1 and M2?

*July 11, 2015*

**PHYSICS**

Can you please make a solution for this problem so i could understand it better...

*June 20, 2015*

**PHYSICS**

A and B run around a circular track whose cicumference is 150m. when they run is opposite directions they meet every 5 seconds, but when they run in the same direction from the some point they are together every 25 seconds. what are their rates? ans. 18m/s and 12m/s can you ...

*June 20, 2015*

**science**

how physical/mechanical and chemical weathering different?

*May 18, 2015*

**science**

how are they different?

*May 18, 2015*

**science**

can someone help me?

*May 18, 2015*

**science**

how are physical/mechanical and chemical weathering alike?

*May 18, 2015*

**PLEASE HELP ME!!**

someone please help me figure out this problem, and btw i am not asking for answers as others say... i am asking how to figure it out or for hints. :)

*May 17, 2015*

**PLEASE HELP ME!!**

UGH THIS PROBLEM IS KILLING ME!!!!!!!!!

*May 17, 2015*

**PLEASE HELP ME!!**

Last year, the Widget Corporation had $650,000 in sales. This year, sales are down 4%. How much did the Widget Corporation sell this year?

*May 17, 2015*

**math**

thank you so much!

*May 17, 2015*

**math**

is it 1.0335 and then round up?

*May 17, 2015*

**math**

would you do 7.95*0.13?

*May 17, 2015*

**math**

ok but i don't know how to do this...

*May 17, 2015*