Sunday

September 25, 2016
Total # Posts: 1,546

**Math**

The difference between two positive number is 72 and one of them is divided by the other, the quotient is 4.Find those numbers. Option: a) 22&94 b) 24&96 c) 20&92 d) 30&102

*July 25, 2011*

**algebra II**

use the properties of logarithms for the expression. 5^log5(7x)

*July 17, 2011*

**algebra II logarithms**

f(x)=log4 (x)+3 how could i get this so i could graph it?

*July 17, 2011*

**math**

what is the definition of area of circle formular.

*July 17, 2011*

**algebra 2**

The pH of a solution is given by the formula pH = -log H+ , where H+ is the concentration of hydrogen ions in moles per liter in the solution. Use this formula to solve the problem. Round answer to one decimal place if necessary. Find the pH of a sample of lake water whose [H...

*July 14, 2011*

**Algebra 2 logarithms**

Use the properties of logarithms to evaluate the expression. 1. 5^log(7x) 2. 10^x + 2 log(x)=x+2 or log(x)=x-2 ????

*July 14, 2011*

**physics**

12.5

*July 13, 2011*

**math**

what isthe area of a 8 inch circle?? what are the calculations. ???

*July 3, 2011*

**rapping>???**

what does it mean when they say i came down with a chip on shoulder

*June 27, 2011*

**English **

its ok i corrected it and got a 100 all i have to do is take my finale exam and im finish with this school thank you guys so much for helping me out alot

*June 23, 2011*

**English **

nope idk you just confused me even more

*June 23, 2011*

**English **

no but can you Check My answers please

*June 23, 2011*

**English **

ok i got nothing,impress.learning,pretending,differently,second,share, and gain

*June 23, 2011*

**English **

alright please do when i finsih

*June 23, 2011*

**English **

According to Kubler Ross, The lessons that dying people teach espically valuable . dying people can look back honestly, because they have ------ to ----- by ------ or trying to -------- anyone -------. They only want to thinking about how they would do things ------- if they ...

*June 23, 2011*

**reading**

According to Kubler Ross, The lessons that dying people teach espically valuable . dying people can look back honestly, because they have ------ to ----- by ------ or trying to -------- anyone -------. They only want to thinking about how they would do things ------- if they ...

*June 23, 2011*

**science**

when water is turn into steam it expands or contacts many times or both ??? i need help with this question

*June 19, 2011*

**reading **

Examine the evidence of the Earth's shape. The sharp horizon at first suggests a flat Earth with an edge. But as you walk toward the horizon, the "edge" recedes ahead of you, implying that the Earth's surface is curved. Look also at a ship sailing out to sea...

*June 14, 2011*

**Science**

I need an Acrostic poem for the word science

*June 10, 2011*

**calculus(equating coefficients)**

Can somebody explain to me why equating coefficients work? Example: 8x^3+13x = Ax^3 + 2Ax + Bx^2 + 2B + Cx + D expanded into: 8x^3 + 13x = Ax^3 + Bx^2 + (2A+C)x + 2(B+D) where A,B,C,D are constants. Why does 8 = A; 0 = B; 13 = 2A + C; etc. I know they have same power variables...

*June 6, 2011*

**Math Deadline Approaching: Please Help**

Thanks....

*June 6, 2011*

**Deadline Approaching: Please Help**

SIMPLEX METHOD - Table: Nutrient Peanuts Raisins M&Ms Pretzels Calories 855 435 1024 162 Protein 34.57 4.67 9.01 3.87 Fat 72.50 0.67 43.95 1.49 Carbs 31.40 114.74 148.12 33.68 Suppose that you want to make at most 10 cups of trail mix, using all the ingredients. You want each ...

*June 6, 2011*

**Math**

What is the proper constraint for this: "You want each of the ingredients to contribute at least 10% of the total volume of the mix made."

*June 6, 2011*

**Math**

I have the objective, I just need the constraints. If you can please list all of the constraints. The constraint that is stumping me is the one where I have to show 10% of the total. Thanks!!!!!

*June 6, 2011*

**Math**

MathMate - I'm still confused, please see below. Thanks!! SIMPLEX METHOD - Table: Nutrient Peanuts Raisins M&Ms Pretzels Calories 855 435 1024 162 Protein 34.57 4.67 9.01 3.87 Fat 72.50 0.67 43.95 1.49 Carbs 31.40 114.74 148.12 33.68 Suppose that you want to make at most ...

*June 6, 2011*

**Math**

MathMate, Sorry.. still confused. I set up the constraints as x1>1, x2>1, x3>1, x4>1 but I'm not getting the answer. Are those contraints correct or is there another way to write it?

*June 4, 2011*

**Math**

SIMPLEX METHOD - Table: Nutrient Peanuts Raisins M&Ms Pretzels Calories 855 435 1024 162 Protein 34.57 4.67 9.01 3.87 Fat 72.50 0.67 43.95 1.49 Carbs 31.40 114.74 148.12 33.68 Suppose that you want to make at most 10 cups of trail mix, using all the ingredients. You want each ...

*June 4, 2011*

**math **

a drum with a 24'' od has a circumference of _''. ????

*June 4, 2011*

**math **

6 cu ft contain_ cu in.???

*June 4, 2011*

**math **

18.84

*June 4, 2011*

**math **

985.96 is this correct

*June 4, 2011*

**math **

the volume of a tank that is 2'- 0'' in diameter and 6' -0'' long is _ cu ft. ???? please help

*June 4, 2011*

**math **

a 31'' diameter circle has an are of _ sq ft.????

*June 3, 2011*

**math**

96 cu in. is this correct

*June 3, 2011*

**math**

the volume of a container that is 8'' long , 4 '' deep, and 3'' high is _ cu in. ???

*June 3, 2011*

**math**

754.385 is this correct

*June 3, 2011*

**math**

a 31'' diameter circle has an area of _ sq ft. ???

*June 3, 2011*

**math**

the radius of a13.5' diameter circle is _ ' ???

*May 29, 2011*

**english / laungage**

3. C 4.d 5.c

*May 24, 2011*

**trig**

Find the angle between 0 and 2pi that is coterminal with negative one half pi; expressing the answer in radians in terms of pi.

*May 19, 2011*

**Chemistry**

its not 21.3 nor 10.7

*May 16, 2011*

**Chemistry**

correct it is 0.84 goodluck cuz i had to trust this answer and it was right.

*May 16, 2011*

**math**

answer in simplest radical form. sin 90 degrees

*May 14, 2011*

**math**

answer in simplest radical form. sin 90 degrees

*May 14, 2011*

**math**

A coin is tossed four times. Find the probability of each of the following: P(exactly 1 head) I know we have to use to this formula p(x=0)=nCk(p)^k(1-p)^n-k How do you find P? if n=4

*May 11, 2011*

**grammar**

fire can be either friendly or a foe, depending on the situation. make parallel

*May 10, 2011*

**Chemistry**

Choose the two half-reactions from a table of standard reduction potentials that most closely approximate the reaction that occur within the battery (Pacemaker). What is the standard voltage generated by a cell operating with these half-reactions? (i got +3.85V). The actual ...

*May 7, 2011*

**Chemistry**

Thank you so much

*May 7, 2011*

**Chemistry**

What is the half-cell reactions in a hydrogen fuel cell, and calculate the standard voltage at 25°C H2(g)+ O2(g)------>2H2O(l)

*May 7, 2011*

**Chemistry**

Choose the two half-reactions from a table of standard reduction potentials that most closely approximate the reaction that occur within the battery. What is the standard voltage generated by a cell operating with these half-reactions? 2Li(s) + Ag2CrO4(s) --------> Li2CrO4(...

*May 7, 2011*

**Chemistry**

Heart pacemakers are often powered by lithium-silver chromate “button” batteries. The overall cell reaction is: 2Li(s) + Ag2CrO4(s) --------> Li2CrO4(s) + 2Ag(s) Lithium metal is the reactant at one of the electrodes of the battery. Is it the anode or the cathode?

*May 7, 2011*

**Chemistry**

Thank you very much. This helps a great deal

*May 7, 2011*

**Chemistry**

Explain with values and reactions from standard reduction potentials tables why neither gold (I) nor gold (III) not to mention the base metal itself, tarnishes (that is can be oxidized by exposure to air)

*May 7, 2011*

**Chemistry**

How much time in years (assume a 365 day yr) would it take for a 1.6678g sample of 239Np to decay to a mass of 0.8671g if it has a half life of 2.030*10^5s

*May 6, 2011*

**Chemistry**

How much energy in KJ is release to form one mole of 123Sb from protons and neutrons if the atom has a mass of 122.90422 amu? Please remember to include the mass of electrons in calculations.

*May 6, 2011*

**Chemistry**

A rock containing 238U and 206Pb was examined to determine its appropriate age. The molar ratio of 206Pb to 238U was 0.1462. Assuming no lead was originally present and that all lead formed remained in the rock. What is the age of the rock in years? The half life of 238U is 4....

*May 6, 2011*

**Statistics**

Hi I am a college student in wireless technology but am only very sketchy on statistics. I'm am trying to write a program to tell me if activity is unusual. I can read the activity of a person from a motion detector from day to day i.e. mon activity - 250 times tues - 300 ...

*May 6, 2011*

**geometry**

Jackson is creating a water garden surrounded by a triangular patch of grass. If the pond will take up the space indicated by the circle, how many square feet of sod will he need to complete the garden (use 3.14 for and round your answer up to the next foot)?

*May 4, 2011*

**math**

16 = 16x^2 - 64x + 64 0 = 16x^2 - 64x + 64 - 16 (using quadratic formula) x= 3 or x =1

*May 3, 2011*

**Math**

Anyone help?

*May 2, 2011*

**Math**

What other post?

*May 2, 2011*

**Math**

Can someone guide me with this question? Four teachers and five students have volunteered to serve on the school's fundraising committee, which is chaired by the principal. The principal wishes to select the committee using a random draw. He places each person's name ...

*May 2, 2011*

**Math**

Should I create a grid 6 by 5? :S

*April 27, 2011*

**Math**

faizel wants to travel from his house to the hardware store that is six blocks east and five blocks south of his home. If he walks east and south, how many different different routes can he follow from his house to the store? Can somebody help me setup this question? I don'...

*April 27, 2011*

**Math**

Find the instantaneous rate of change for the function at the given value. f(x)=x^2+2x at x=-4

*April 27, 2011*

**Math**

Using the arrangement of letters in the margin, compute the number of paths that spell the word MATHEMATICS if all paths must start at the top and move diagonally down through the letters. M A A T T T H H H H E E E M M M M A A A T T I I I C C S I only got up to E E E, I don&#...

*April 26, 2011*

**Calculus**

Could someone work this out so I understand it. Thanks Given the supply function p=S(x)=5(e^0.02x-1) Find the average price (in dollars)over the supply interval [31,36] The 0.02x in the only thing ^ on the e

*April 25, 2011*

**History**

how trading helped sparta economy?

*April 25, 2011*

**world history**

The Europeans desire for profit affected the people of Congo by taking away their freedom, forcing them into slavery, taking away their customs, affected the economy etc.

*April 24, 2011*

**Chemistry**

The vapor pressure of water at 95C is normally 6.33.9 but decreased to 561.2mmHg upon addition of an unknown amount of NaOCl to 164.3g of water at this temp. How many grams of NaOCl was added assuming complete dissociation of the solute

*April 23, 2011*

**Chemistry**

I followed this procedure but i was told the answer was incorrect. Any help would be appreciated.

*April 23, 2011*

**Chemistry**

Oh just kidding after much frustration and stepping away from the problem and coming back, I noticed that I messed up the density in my conversion. I had the right idea I just had to correct my mistake and then continue on with the molar mass of CaF2, then I divided 4 ...

*April 18, 2011*

**Chemistry**

Calcium fluoride is the well-known mineral fluorite. It is known that each unit cell contains four Ca2+ ions and eight F- ions and that the Ca2+ are arranged in a face-centered cubic lattice. The F- ions fill all the tetrahedral holes. The edge of the CaF2 unit cell is 5.46295...

*April 18, 2011*

**Math**

Can someone help me verify if this is correct? Gasoline usage for compact cars in Canada is a normal distribution with a mean of 33.3 km/l and with standard deviation of 7.3 km/L. Round your answers to one decimal place. a) What percentage of compact cars obtains 20km/L or ...

*April 17, 2011*

**Math**

anyone?

*April 17, 2011*

**Math**

Can someone help me verify if this is correct? Gasoline usage for compact cars in Canada is a normal distribution with a mean of 33.3 km/l and with standard deviation of 7.3 km/L. Round your answers to one decimal place. a) What percentage of compact cars obtains 20km/L or ...

*April 17, 2011*

**Math**

She added 4, multiplied the sum by -5, and subtracted 12. She then doubled the result and got -34. What number did Christa started with?

*April 14, 2011*

**social studies**

what was one of the increased use of the assembly line in the 1920's?

*April 11, 2011*

**geography**

what would happen if wheat was no longer a resource to the U.S.?

*April 4, 2011*

**Physics**

A 7.80-g bullet moving at 590 m/s penetrates a tree trunk to a depth of 4.8 cm. Assuming the friction force is constant, determine how much time elapses between the moment the bullet enters the tree and the moment it stops moving.

*March 24, 2011*

**chemistry**

for an exotherimic reaction incresing the reaction temperature results in a (n)___k ?

*March 22, 2011*

**chemistry**

given reaction at equilibrium, if Kp=1.05 at 250 degree celcius, then kc =

*March 22, 2011*

**algebra**

8000, because 1m=100cm. You take the 100m/5cm=20 cubes. V=LxWxH. 20x20=400x20=8000

*March 20, 2011*

**chem**

how many moles of NaOH are needed to neutralize 50.0 Ml 0f ).242 M H2SO4 solution ?

*March 19, 2011*

**physics**

The engine weighs 4500 newtons and it is lifted 1.5 meters up by the block and tackle system. The mechanic must apply a force of 225 newtons while pulling a total of 37.5 meters of chain through the block and tackle pulley system. What is the work done by the block and tackle ...

*March 17, 2011*

**Physics**

.455

*March 15, 2011*

**Geometry **

(20^2-7^2) = 351 sqrt of 351 = 18.7

*March 9, 2011*

**Geometry **

Find the length of the altitude of an isosceles triangle if one side has a length of 20 ft and a base of 14 ft?

*March 9, 2011*

**English**

Yeah but the entire essay is a narration, and in my question I had to pick out the thesis for both Frazier and his narrator. So I had to find in the essay where Frazier interjects his own thesis.

*March 8, 2011*

**English**

I am between two different thesis statements for Frazier either it is where the writing becomes italicized, "Remember to keep shower curtain inside tub at all times!" Or In the last paragraph from Operating the shower curtain is kind of tricky to there is no need ...

*March 8, 2011*

**English**

Within this I have another question. I am between two different thesis statements for Frazier either it is where the writing becomes italicized, "Remember to keep shower curtain inside tub at all times!" Or In the last paragraph from Operating the shower curtain is ...

*March 8, 2011*

**English**

Help! In Ian Frazier's essay How to Operate the Shower Curtain, what problems are users likely to encounter in using the shower curtain?

*March 8, 2011*

**Physics**

An electron is accelerated through 2200 V from rest and then enters a region where there is a uniform 1.30 T magnetic field directed perpendicularly to the electron's velocity.

*March 7, 2011*

**math**

6 + 3

*March 7, 2011*

**math**

A computer technician charges $40 for a house call and $38 per hour. The expression 40 + 38t is used to find the cost of a house call that lasts t hours. What is the cost of a house call that last 3 hours?

*March 7, 2011*

**math**

A phone compant uses the expression 1.25 + 0.10m to calculate the cost of a phone call that lasts m minutes. What is the cost of a call that last 20 minutes?

*March 7, 2011*

**Calculus 12th grade (double check my work please)**

2 and 3 are right. the first one is a trick question. It is a circle, so the tangent line is always 90 degrees to the radius

*March 6, 2011*

**Algebra**

Factor 2xsquared minus 5x minus 3.

*March 5, 2011*

**Business Communications**

Thank you, my understanding of when or where to use Ms. was wrong.

*March 5, 2011*

**Business Communications**

5: You are attending a professional conference and are privileged to be introduced to Caroline Peters. You know nothing about her except that she is an executive at a very successful company. You have and idea that you would like to talk over with her. How should you address ...

*March 5, 2011*