# Posts by Derek

Total # Posts: 291

**Math**

A swimming pool is filled with water at a constant rate of 9 gallons every 10 minutes. After 30 minutes, the pool is filled with 55 gallons of water. Which equation represents this relationship ? F. y= 9x + 55 G. y= 10x + 28 H. y= 9/10x + 28 J. y= 9/10x + 55

*March 7, 2017*

**MATH (POST 2) Need Help Please**

Alright, thank you for your response!

*February 18, 2017*

**MATH (POST 2) Need Help Please**

Using the average daily balance method and the information? given, find the credit card finance charge for the month of August? (31 days). The annual interest rate is? 18%. July 31st (Balance) $590 August 5 (Charge) $90 August 9 (Payment)$560 August 14 (Charge)$193 August 24 (...

*February 18, 2017*

**Math (Business)**

Using the average daily balance method and the information? given, find the credit card finance charge for the month of August? (31 days). The annual interest rate is? 18%. July 31st (Balance) $590 August 5 (Charge) $90 August 9 (Payment)$560 August 14 (Charge)$193 August 24 (...

*February 18, 2017*

**Politics**

Thank you for all the help. I know I must make my decision. I already have an idea of how I want to answer it. Thanks for giving it in a different perspective and also, for the sources. I will use these to evaluate my thoughts.

*February 17, 2017*

**Politics **

To what extent do wealthy countries, such as the US and the members of the European Union have a responsibility to do more for the refugee crisis? I have to write a short essay on this topic and I do not exactly know how to approach it. Thanks

*February 17, 2017*

**Statistics**

A teacher gives a reading skills test to a third-grade class of n = 25 at the beginning of the school year. To evaluate the changes that occur during the year, students are tested again at the end of the year. Their test scores showed an average improvement of MD = 12.7 points...

*February 2, 2017*

**Physics**

The value of the electric field at a distance of 86.9 m from a point charge is 74.9 N/C and is directed radially in toward the charge. What is the charge? The Coulomb constant is 8.98755 × 109 N · m2 /C 2 . Answer in units of C.

*February 2, 2017*

**math**

Lily and Rose are playing the game in the game each player starts with 0 points

*October 20, 2016*

**maths**

Given that y is a prime number evaluate 12y-12

*September 22, 2016*

**Pre-cal**

Given that P=(-1,8) and Q=(-2,1), find the component form and magnitude of the vector 3 PQ.

*May 14, 2016*

**algebra**

Gemma recently rode her bicycle to visit her friend who lives 6 miles away. On her way there, her average speed was 16 miles per hour faster than on her way home. If Gemma spent a total of 1 hour bicycling, find the two rates.

*May 2, 2016*

**chemistry**

Balance this equation. If a coefficient of "1" is required, choose "blank" for that box. CH4 + O2 → CO2 + H2O

*May 2, 2016*

**Math**

I need help with this burrowing money questions. # 1: Zara received a credit card statement that has a new balance of $987.65 & a minimum payment of $43.21. The annual percent rate is 15% compounded daily and charged on the unpaid balance. Zara makes only the minimum payment. ...

*March 18, 2016*

**chemistry**

Calculate the molarity of a 6% solution of ammoniun nitrate of density 1.025 g/mL

*December 7, 2015*

**Chemistry**

The cooling system in an automobile holds 10.0 L of ethylene glycol antifreeze. How much energy is absorbed when the temperature of the ethylene glycol goes from 20°C to 100°C? The density and specific heat capacity of ethylene glycol are 1.11 g/mL and 2.42 J/(g •...

*October 21, 2015*

**Math**

i don't know sorry lol

*September 23, 2015*

**math**

the answer is 85

*September 21, 2015*

**Math**

J=? NUMBERS=THE SAME AS LETTERS THAT MEANS J=10 IF YOU DON'T BELIVE IT LOOK ABCDEFGHIJ COUNT HOW MANY LETTERS ARE THERE THEY ARE 10 LETTERS SO J=10

*May 7, 2015*

**math**

thats my name

*January 11, 2015*

**math**

please

*January 11, 2015*

**math**

simplify: 6-y/6/1/6-1/y 6-y/6*6y/y-6= 6y/6=y Is this correct help i need help!! answers: A. -y B. y C. -6/y D. -1/y which one?

*January 11, 2015*

**math**

simplify: (y+1)(y/1-y^2) which answer: A. Y/y-1 B. y/1-y C. y+1/y-1 D. -1 this is what i got y+1/1* Y/1-y^2=-1

*January 11, 2015*

**math**

if 3abs(x+4)=8, then x=? A. {-10,2} B. {-2,2} C. {-19,11} D. {-22,-14} which one? idek

*January 11, 2015*

**math**

if 1-1/x=2-2/x, then 3-3/x=? A. -3 B. -1/3 C. 0 D. 1/3 E. 3 idek how to do it?

*January 11, 2015*

**math**

4x^2+4y^2-16x-24y+51=0 is the equation of a circle. where is the center of the circle and what is it's radius? A. center (2,3) radius=1/4 B. center (2,3) radius=1/2 C. center (-2,-3) radius=1/4 D. center (-2,-3) radius=1/2

*January 11, 2015*

**college pre-calculus**

4x^2+4y^2-16x-24y+51=0 is the equation of a circle. where is the center of the circle and what is it's radius? A. center (2,3) radius=1/4 B. center (2,3) radius=1/2 C. center (-2,-3) radius=1/4 D. center (-2,-3) radius=1/2

*January 11, 2015*

**college pre-calculus**

1-1/x+2-2/x=3 1/2+2

*January 11, 2015*

**college pre-calculus**

1-1/x+2-2/x

*January 11, 2015*

**college pre-calculus**

if 1-1/x=2-2/x, then 3-3/x=? A. -3 B. -1/3 C. 0 D. 1/3 E. 3 idek how to do it?

*January 11, 2015*

**ap college pre-calculus**

if 3abs(x+4)=8, then x=? A. {-10,2} B. {-2,2} C. {-19,11} D. {-22,-14} which one? idek

*January 11, 2015*

**college pre-calculus**

simplify: (y+1)(y/1-y^2) which answer: A. Y/y-1 B. y/1-y C. y+1/y-1 D. -1 this is what i got y+1/1* Y/1-y^2=-1

*January 11, 2015*

**college pre-calculus**

simplify: 6-y/6/1/6-1/y 6-y/6*6y/y-6= 6y/6=y Is this correct help i need help!! answers: A. -y B. y C. -6/y D. -1/y which one?

*January 11, 2015*

**college pre-calculus**

simplify: square root (4/3)-square root (3/4) A. 2-sqaure root(3)/2 square root (3) B. square root (7/12) C. square root (3)/6 D. 2/square root (3) which answer? this is what i got square root (16/12)- square root (9/12)= square root (7/12)

*January 11, 2015*

**college pre-calculus help**

it is division

*January 11, 2015*

**college pre-calculus help**

simplify: 6-y/6/1/6-1/y 6-y/6*6y/y-6= 6y/6=y Is this correct help i need help!!

*January 11, 2015*

**Chemistry**

I was using Ea in joules/mol, thank you for your help!

*December 2, 2014*

**Chemistry**

But the answer is supposed to be 2.2x10^-2

*December 2, 2014*

**Chemistry**

I've used the two-point form of the Arrhenius equation and I keep ending up with 9.8x10^-3 for k2

*December 2, 2014*

**Chemistry**

The aquation of tris(1,10-phenanthroline)iron(II) in acid solution takes place according to the equation: Fe(phen)32++ 3 H3O++ 3 H2O →Fe(H2O)62++ 3 phenH+. If the activation energy, Ea, is 126 kJ/mol and the rate constant at 30°C is 9.8 × 10-3 min-1, what is ...

*December 2, 2014*

**math**

im not that smart

*October 6, 2014*

**physics**

This would not happen in household wiring because of circuit breakers.

*September 13, 2014*

**physics**

R=Ro+Ro*a*(T-To) (2Ro-Ro)/Ro=a*(T-To) we want to double resistance. For example if our initial resistance is 10, we want R to be 20, therefore R=2Ro. (2Ro-Ro)/Ro=1, so 1/alpha=T-To divide by alpha (1/alpha)+To=T add To to both sides So To=20C. Alpha from my old old physics ...

*September 13, 2014*

**Physics**

You serve a tennis ball from a height of 2.1 m above the ground. The ball leaves your racket with a speed of 19.2 m/s at an angle of 5.3° above the horizontal. The horizontal distance from the court's baseline to the net is 11.83 m, and the net is 1.07 m high. Neglect ...

*September 8, 2014*

**Chemistry**

Just out of curiosity, how would you figure out the delta g if you didn't know the delta h? I don't think it is possible, is it? And also, can you explain how you knew it was exothermic?

*May 27, 2014*

**Chemistry**

When magnesium hydrogen carbonate reacts with sulfuric acid, would you consider that an exothermic reaction because it forms CO2 (gas)?

*May 27, 2014*

**math**

(4.3 x 10-8) (1.5 x 109) Compute and write in scientific notation

*March 17, 2014*

**Math**

If a metal bar at a temperature of 20 degree celcius is dropped in boiling water how long will it take for the bar to reach 98 celcius at a rate of 2 degrees per second

*February 21, 2014*

**math**

$8000 is shared between 3 schools in the ratio of 2:3:5, how much will each school get?

*February 9, 2014*

**chemistry**

I did a lab the other day where we separated a mixture of NaCl, SiO2, and CaCO3. The Mixture was made by my professor and we did not know the original amounts of each compound. After recovering all of the compounds we found that there was.. 36.4% NaCl 36.4% SiO2 40.9% CaCO3 ...

*February 5, 2014*

**chemistry**

I did a lab the other day where we separated a mixture of NaCl, SiO2, and CaCO3. The Mixture was made by my professor and we did not know the original amounts of each compound. After recovering all of the compounds we found that there was.. 36.4% NaCl 36.4% SiO2 40.9% CaCO3 ...

*February 5, 2014*

**chemistry**

I did a lab the other day where we separated a mixture of NaCl, SiO2, and CaCO3. The Mixture was made by my professor and we did not know the original amounts of each compound. After recovering all of the compounds we found that there was.. 36.4% NaCl 36.4% SiO2 40.9% CaCO3 ...

*February 5, 2014*

**chemistry**

I did a lab the other day where we separated a mixture of NaCl, SiO2, and CaCO3. The Mixture was made by my professor and we did not know the original amounts of each compound. After recovering all of the compounds we found that there was.. 36.4% NaCl 36.4% SiO2 40.9% CaCO3 ...

*February 5, 2014*

**chemistry**

I did a lab the other day where we separated a mixture of NaCl, SiO2, and CaCO3. The Mixture was made by my professor and we did not know the original amounts of each compound. After recovering all of the compounds we found that there was.. 36.4% NaCl 36.4% SiO2 40.9% CaCO3 ...

*February 5, 2014*

**5th grade math**

h+f = 120 h+p = 230 p = 6f h+6f = 230 h+6(120-h) = 230 h+720-6h = 230 -5h = -490 h = 98

*November 22, 2013*

**Algebra, 0110 HELP!**

Including 5% sales tax, an inn charges $210.00 per night. Find the nightly cost at the inn before tax is added. (a) Write an equation to model the problem. Let x represent the nightly cost before tax. (b) Solve the equation to find nightly cost before tax. (Note: Your answer ...

*September 7, 2013*

**Math**

Denise took a total of 80 calls on her shift at work today. Of those 80 calls, 55% were resolved, 15% escalated to a supervisor, and 10% required that a technician be sent out to the customer's house. What is the total number of calls that Denise resolved on her shift ...

*August 20, 2013*

**physics**

After sliding down a snow-covered hill on an inner tube, Ashley is coasting across a level snowfield at a constant velocity of +2.8 m/s. Miranda runs after her at a velocity of +4.8 m/s and hops on the inner tube. How fast do the two of them slide across the snow together on ...

*June 30, 2013*

**Math (HELP PLZ)**

Thanks, I wasn't so sure at first, I guess I just forgot

*June 3, 2013*

**Math (HELP PLZ)**

The glass in Lee’s window needs replacing. It is 30 inches wide and 24 inches long. What is the area (A) of the glass Lee should buy? A. A = (2 × 30) + (2 × 24) = 108 in. B. A = 30 × 24 = 720 in2 C. A = 2 × (30 + 24) = 108 in2 D. A = 30 + 24 = 54 in.

*June 3, 2013*

**comp**

Which of the following contains a pronoun error? (Points : 2) Neither Jane Austen nor Mary Shelley is known for their poetry. As the curtain rises, everyone in the audience settles into his or her seat and waits for the play to begin. The book sale that is held in the spring ...

*May 28, 2013*

**Math**

A fence is 20 ft long. it has posts at each end and at every four feet along its length. how many fence posts are there? Draw a picture.

*May 20, 2013*

**math**

what is the y-intercept of the line of 35.00 + 8.00x if the slope is 8

*April 26, 2013*

**Computer (Visual Basic)**

You are in the process of selecting the BackColors and ForeColors for you new application. When you originally learned to use Visual Studio, you were only aware of one of the palettes that was available to you, but your developer colleague informs you that you have more ...

*April 9, 2013*

**Math**

Distributive property 9x

*March 31, 2013*

**Advanced Algebra**

Write the equation for the depreciation of the value of your car for t years at 14% per year.

*March 28, 2013*

**physics**

puddin pops yumyumyumyum olololololololo i love you bby

*March 22, 2013*

**launguage**

Read the following excerpt from “All Together Now”: What can parents do? We can put our faith in young people as a positive force. I have yet to find a racist baby. Babies come into the world as blank as slates and, with their beautiful innocence, see others not as ...

*March 12, 2013*

**Programming (Visual Basic)**

Im seem to be having trouble with this Exercise. Would you mind helping me please? How do i do this Visual Basic program? Instructions say: Fix the following code: Dim dblRegularPay As Double Dim dblOvertimePay As Double intRegularPay = 783.87 intOvertimePay = 105.92 lbl ....

*March 5, 2013*

**algebra**

Is v=s2 a quadratic relation?

*March 3, 2013*

**Physics**

Roughly how high could a 340 K copper ball lift itself if it could transform all of its thermal energy into work? Assume specific heat for copper equal to 386 J/kg·K.

*March 3, 2013*

**Physics**

Roughly how high could a 340 K copper ball lift itself if it could transform all of its thermal energy into work? Assume specific heat for copper equal to 386 J/kg·K.

*March 3, 2013*

**Math**

2/3/3= A. 2/9 B. 1/9 C. 1 D. 2

*March 2, 2013*

**Math**

a banner requires 1 1/2 sections of plastic. How many banners can be made from 12 sections of plastics? A.7 B.8 C.9 D.15

*March 2, 2013*

**English**

so is it sell or bargain?

*March 2, 2013*

**English**

So your saying the answer is Bargain?

*March 2, 2013*

**English**

buying and selling

*March 2, 2013*

**English**

Are you sure that's correct because someone told me the answer is Sell or Bargain

*March 2, 2013*

**English**

Which of the following words is different from the others? A. Sell B. Trade C. Barter D. Bargain

*March 2, 2013*

**health**

A client comes in and asks for a pregnancy test. What do you do?

*February 22, 2013*

**hardware**

A driver is a blank that interacts with a particular device or special (frequently optional) kind of software?

*February 20, 2013*

**Computer (Hardware Support)**

What types of devices use USB ports?

*January 17, 2013*

**Finance**

A company wishes to issues bonds with a coupon rate of 5%. The company wishes to raise 100 million dollars net of commissions (5% of total sales). Each bond has a face value of $1,000 and matures in 10 years. Interest is to be paid semi-annually. Using the following conditions...

*December 12, 2012*

**physics**

An object is located 16.8 cm in front of a convex mirror, the image being 11.5 cm behind the mirror. A second object, twice as tall as the first one, is placed in front of the mirror, but at a different location. The image of this second object has the same height as the other...

*November 14, 2012*

**physics**

Two parallel plate capacitors are identical, except that one of them is empty and the other contains a material with a dielectric constant of 4.2 in the space between the plates. The empty capacitor is connected between the terminals of an ac generator that has a fixed ...

*November 13, 2012*

**Calculus**

An open top bos with a square base is to be constructed from 192 sq ft of material. What should be the dimensions of the box if the volume is to be a maximum? What is the maximum volume?

*October 29, 2012*

**Physics**

need help with this problem :/ A circular coil (980 turns, radius = 0.078 m) is rotating in a uniform magnetic field. At t = 0 s, the normal to the coil is perpendicular to the magnetic field. At t = 0.027 s, the normal makes an angle of 45o with the field because the coil has...

*October 28, 2012*

**physic**

A charge of -2.73 μC is fixed in place. From a horizontal distance of 0.0465 m, a particle of mass 9.50 x 10-3 kg and charge -9.56 μC is fired with an initial speed of 97.2 m/s directly toward the fixed charge. What is the distance of closest approach?

*October 11, 2012*

**MATH URGENT**

I MEAN AN EVEN SORRY!

*September 11, 2012*

**MATH URGENT**

SRRY I MEANT AN EVEN INTEGER HAS BEEN REMOVED LOL

*September 11, 2012*

**MATH URGENT**

AN INTEGER IS RANDOMLY SELECTED AND PERMANENTLY REMOVED FROM THE SET OF 100 INTEGERS (1,2,3,...100). WHAT IS THE MINIMUM NUMBER OF TIMES THIS REMOVAL PROCEDURE WILL HAVE TO BE DONE TO GUARANTEE THAT AN INTEGER HAS BEEN REMOVED?

*September 11, 2012*

**math *IMPORTANT**

oops 0 is 0 111111 its 6 tally marks

*September 10, 2012*

**math *IMPORTANT**

HENRY PROGRAMMED A CALCULATOR TO RANDOMLY DISPLAY A DIGIT FROM 0 THROUGH 9. THE RESULTS OF THE FIRST 50 DISPLAYS ARE SHOWN ON THE TABLE BELOW. WHAT IS THE POSITIVE DIFFERENCE BETWEEN THE THEORETICAL PROBABILITY AND EXPERIMENTAL PROBABILITY FOR GETTING A 9 IF EACH DIGIT HAS AN ...

*September 10, 2012*

**MATH *IMPORTANT**

well i get that but i just don't c what the answer is becuase it takes forever to do this problem u have to use numbers ubtil you have them all. i am in mathcounts and it is totally competition i cant be up doing a problem like that isnt there a possible way to do it ...

*September 10, 2012*

**Calculus**

Find the maximum area of a rectangle that lies above the x axis and below y=9-x^2

*June 27, 2012*

**Calculus**

Find the maximum and minimum product of 2 numbers who sum is 5

*June 27, 2012*

**Calculus**

If y= (x^2+20)/(x-4) Find all critical Numbers. After get f' i got the answer -5/4. What did i do wrong or is that the critical number?

*June 27, 2012*

**math**

If y= (x^2+20)/(x-4) Find all critical Numbers. After get f' i got the answer -5/4. What did i do wrong or is that the critical number?

*June 27, 2012*

**recreation travel**

Sorry I was not more clear. The airline has stated that A container can be carried but must not exceed 158cm in total. eg. LxWxH The container I need to take is a tube that must be 118cm long. I need to know what diameter the tube can be to meet the overall total of 158cm. Thanks

*June 14, 2012*