Wednesday

February 10, 2016
Total # Posts: 1,095

**math**

Padding 7 miles upstream, Steven and his brother averaged 2 miles per hour. On the way back, their rate of speed was 3 1/2 miles per hour. How long did it take them to make the round trip?
*July 16, 2013*

**math**

A computer train travels the distance from Acton to Boston in 1 hour and 10 minutes. If the train is traveling at an average speed of 48 miles per hour, what is the distance between the two cities?
*July 16, 2013*

**chem 103**

Thank you for your time! Obviously I need to review the equation set-ups again. You were very helpful!
*July 14, 2013*

**chem 103**

Thank you so much! Now for the second part of the question. How many ml of that stock solution would you need to prepare 175 ml of 0.750 M diluted Na3PO4 solution? My answer is 4.27 ml of stock solution. Is that correct? Thank you. If yes , the next part of the question is: if...
*July 14, 2013*

**chem 103**

Still stuck on this question. How many grams of Na3PO4 would you need to make 0.225L of 8.0M stock solution? 8.0 M of NaPo multiplied by .225L NaPO = 1.8 mols of Na3PO4. Then multiply the 1.8 mol times the mass of Na3PO4 which is 163.93 grams?, yes? This would make 295.07 ...
*July 14, 2013*

**algebra 2**

sorry ax-bx=2a
*July 11, 2013*

**algebra 2**

solve equation for x atate any restrections ax-bx+2a
*July 11, 2013*

**College 103 Chem**

How many grams of Sodium Phosphate would you need to make 225ml of 8.00M of stock solution? Thank you
*July 10, 2013*

**Math**

CHEATER!!!!! do not answer this. this is an ongoing problem on brilliant . org. Be ashamed of yourself, "best".
*June 18, 2013*

**physics**

A car is hauling a 89 kg trailer, to which it is connected by a spring. The spring constant is 2100 N/m. The car accelerates with an acceleration of 0.29 m/s2. By how much does the spring stretch?
*June 14, 2013*

**pls heeelp math**

Please stop cheating, mathslover. I will delete your account on Brilliant if you continue this behavior. -Calvin
*June 7, 2013*

**plls heeeeeeelp math**

How many ordered pairs of positive integers 1≤k≤n≤50 are there, such that k divides n, and (n/k )!= n!/k! ?
*June 4, 2013*

**heeeeeeeeelp math**

is it ? are you know my Brilliant Accout? hahaha freaking stupid threat
*June 3, 2013*

**heeeeeeeeelp math**

How many ordered pairs of positive integers 1≤k≤n≤50 are there, such that k divides n, and (n/k )!= n!/k! ?
*June 3, 2013*

**heeelp tooough physics**

A tunable capacitor (with variable capacitance) is charged by a U 0=12 V battery and then is connected in parallel to a R=3 Ω resistor. The capacitance C(t) of the capacitor is controlled so that the current in the circuit remains constant at all times. What is the power...
*June 1, 2013*

**heeeeeeelp geometry**

In a triangle ABC, BK is an angle bisector. A circle with radius 5/3 passes through the vertex B, intersects AB at a point L, and is tangent to AC at K. It is known that the length of AC is 3√3, and the ratio of the lengths |AK| to |BL| is 6:5. The area of the triangle ...
*June 1, 2013*

**heeeeeeeeeelp math**

Miles has 4 Lego people in his Lego town. A Lego person consists of exactly 1 set of legs, a torso, and a head. All of these body parts are distinct. Miles' son comes in and takes apart the Lego people. How many different sets of 4 Lego people can be created from the pieces?
*June 1, 2013*

**heeeeeeeeeeeeelp math**

ur answer was wrong
*June 1, 2013*

**heeeeeeeeeeeeelp math**

Miles has 4 Lego people in his Lego town. A Lego person consists of exactly 1 set of legs, a torso, and a head. All of these body parts are distinct. Miles' son comes in and takes apart the Lego people. How many different sets of 4 Lego people can be created from the pieces?
*June 1, 2013*

**heeeeeeeelp math**

Let x,y,z be non-negative real numbers satisfying the condition x+y+z=1 . The maximum possible value of x^3*y^3+y^3*z^3+z^3*x^3 has the form a/b where a and b are positive, coprime integers. What is the value of a+b ?
*May 31, 2013*

**heeeeeeelp math**

Miles has 4 Lego people in his Lego town. A Lego person consists of exactly 1 set of legs, a torso, and a head. All of these body parts are distinct. Miles' son comes in and takes apart the Lego people. How many different sets of 4 Lego people can be created from the pieces?
*May 30, 2013*

**heeeelp physics**

A tunable capacitor (with variable capacitance) is charged by a U 0=12 V battery and then is connected in parallel to a R=3 Ω resistor. The capacitance C(t) of the capacitor is controlled so that the current in the circuit remains constant at all times. What is the power...
*May 30, 2013*

**pllllls heeeeeeeeelp math**

Let x,y,z be non-negative real numbers satisfying the condition x+y+z=1 . The maximum possible value of x^3*y^3+y^3*z^3+z^3*x^3 has the form a/b where a and b are positive, coprime integers. What is the value of a+b ?
*May 30, 2013*

**math plllls heelp**

How many integers 1≤N≤1000 can be written both as the sum of 26 consecutive integers and as the sum of 13 consecutive integers?
*May 29, 2013*

**heeeeeeeeeeeeeeeeeeeelp maths**

In triangle ABC, points D,E,F are on sides BC,CA,AB respectively such that AD,BE,CF are angle bisectors of triangle ABC. The lines AD,BE,CF are concurrent at I, the incenter of triangle ABC. If ∠BAC=92∘, what is the measure (in degrees) of ∠EIF?
*May 28, 2013*

**help math**

In triangle ABC, points D,E,F are on sides BC,CA,AB respectively such that AD,BE,CF are angle bisectors of triangle ABC. The linesAD,BE,CF are concurrent at I,the incenter of triangle ABC. If Angle BAC=90, what is the measure (in degrees) of Angle EIF?
*May 28, 2013*

**help maths**

f(x) is a cubic polynomial such that f(n)=1/n^2+1 for n=1,2,3,4. If f(0)=a/b,where a and b are coprime positive integers, what is the value of a+b
*May 28, 2013*

**geometry**

A rectangular prism has a volume of 250 cubic cm.What would the volume be if one dimension stayed the same, a second dimension was three times as long, and the third was twice as long?
*May 23, 2013*

**Probability**

Andrew has ten different two-player board games on his shelf. He has them numbered 1 through 10. When he plays the game i against Diego, he has a i^2/100 chance of winning. If Andrew rolls a fair ten-sided die to determine which game to play, the probability that he will win ...
*May 20, 2013*

**Geometry**

ABC is a triangle with a right angle at A. M and N are points on BC such that AM is the altitude, and AN is the angle bisector of ÚBAC. If CN/NB =21 , what is CM/MB ?
*May 16, 2013*

**Algebra**

Suppose x and y are real numbers and 4x+3xi+yi−43=2y+2xi−x+2yi+5i . What is the product xy .
*May 15, 2013*

**Science**

Two point charges +q=1 ìC and −q=−1 ìC with mass m=1 g are fixed at the positions ±r ⃗ 0 with |r 0 |=1 m . The charges are released from rest at t=0 . Find the time ô in seconds at which they collide.
*May 15, 2013*

**math**

what is a pentagon
*May 13, 2013*

**algebra**

4x-3y=24
*April 28, 2013*

**Statistics**

help
*April 24, 2013*

**accounting**

Ziegler Corporation purchased 25,000 shares of common stock of the Sherman Corporation for $40 per share on January 2, 2010. Sherman Corporation had 100,000 shares of common stock outstanding during 20 I3, paid cash dividends of $120.000 during 20 I3, and reported net income ...
*April 20, 2013*

**College Physics**

A uniform ladder of mass, m, and length, l, leans at an angle, theta, against a frictionless wall. Determine a formula for the minimum angle at which the ladder will not slip.
*April 20, 2013*

**College Physics**

A large 61.0 kg board is propped at a 45 degree angle against the edge of a barn door 2.9m wide. How great a horizontal force must a person behind the door exert (at the edge) in order to open it? Assume that there is negligible friction between the door and the board but that...
*April 20, 2013*

**College Physics**

A cubic crate of side s=2.0m is top-heavy: its CG is 18cm above its true center. Part A) How steep an incline can the crate rest on without tipping over? Part B) What would your answer be if the crate were to slide at constant speed down the plane without tipping over? (The ...
*April 20, 2013*

**chemistry**

URGENT THANKYOU
*April 17, 2013*

**chemistry**

C2H5OH+O2-CH3COOH+H2O HOW MANY MOLES OF ETHANOL IN 5g
*April 17, 2013*

**language arts & writing**

probably c if i were to guess
*April 15, 2013*

**chemistry (electrochemistry)**

1) For the following electrochemical cell Cu(s)|Cu2 (aq, 0.0155 M)||Ag (aq, 1.50 M)|Ag(s) write the net cell equation. Calculate the following values using standard potentials as needed. Eo cell and dGo for each reaction...
*April 15, 2013*

**chemistry**

A current of 3.78 A is passed through a Pb(NO3)2 solution for 1.40 hours. How much lead is plated out of the solution?
*April 15, 2013*

**accounting**

Hillsborough Co. has an available-for-sale investment in the bonds of Schuyler with a carrying (and fair) value of $ 85,540. Hillsborough determined that due to poor economic prospects for Schuyler, the bonds have decreased in value to $ 59,710. It is determined that this loss...
*April 14, 2013*

**accounting**

Rushia Company has an available-for-sale investment in the 10%, 10-year bonds of Pear Co. The investment’s carrying value is $3,200,000 at December 31, 2010. On January 9, 2011, Rushia learns that Pear Co. has lost its primary manufacturing facility in an uninsured fire. ...
*April 14, 2013*

**Algebra**

a,b,c are positive integers such that a:b=7:9 and b:c=12:7 . What is the smallest possible value of a ?
*April 11, 2013*

**Statistics and Research Methods**

reject
*April 4, 2013*

**help making equations**

Jeb has to pay a plumber $65 to come to his house and $40 per hour after that. Write an equation for the cost (y) based on the number of hours (x)
*April 2, 2013*

**math**

Thank you sir
*March 31, 2013*

**math**

Hi ! Here is my question: The pythagorean theorem gives the relationships between the sides of a right triangle. The following identities show the relationships between the trigonometric functions of a particular angle. sin^2(theta) + cos^2(theta) = 1 tan^2(theta) + 1 = sec^2(...
*March 31, 2013*

**math**

find the monthly payment for the loan. Finance $ 750.000 for a warehouse with a 9.50% 30 year loan.
*March 17, 2013*

**math**

thank you I got this 65.89
*March 17, 2013*

**math**

Ms Sue where did you add 5%
*March 17, 2013*

**math**

Ms Sue What about 15% installment loan
*March 17, 2013*

**math**

Karen and Wayne need to buy a refrigerator because theirs just broke. Unfortunately, their savings account is depleted, and they will need to borrow money in order to buy a new one. Sears offers them an installment loan at 15% (add-on rate). If the refrigerator at Sears costs...
*March 17, 2013*

**math**

Thank you for help.
*March 17, 2013*

**math**

Find the number of decibels for the power of the sound given. Round to the nearest decibel. A rocket engine, 2.65 times 10^-5 watts/cm^2
*March 17, 2013*

**math**

Find the number of decibels for the power of the sound given. Round to the nearest decibel. A rocket engine, 2.65 times 10^-5 watts/cm^2
*March 16, 2013*

**math**

Thank you for your help.
*March 15, 2013*

**math**

Thank you for answering my question.But I really do not know what happend to the 4 in front of the equation?
*March 15, 2013*

**math**

4 In e= In (ã(3))/(x)-4 In e Solve the equations by finding the exact solution.
*March 15, 2013*

**Chemistry**

I just tried that and it told me the answer was incorrect. It gave a hint saying In acidic solution, use the reaction given for the solvation of CaCO3 in acidic solution. Construct a concentration table that allows for the calculation of final concentration as if the reaction ...
*March 11, 2013*

**Chemistry**

Compare the g/L solubility of CaCO3 in pure water, a H3O+ (aq) solution with a PH of 3.00 and a H30+(aq) solution with a pH of 1.00. Ksp for CaCO3 is 3.36 x 10^-9 CaCO3 (s) + H3O (aq) = Ca (aq) + HCO3 (aq) + H2O (l) (equilibrium equation) Keq= 71 I knew how to do this for pure...
*March 11, 2013*

**chemistry**

Chlorine gas is collected in a gas collecting tube above water. The gas is at 20oC and the total pressure in the tube is 755 mmHg. What is the pressure (in mmHg) of chlorine gas in the tube?
*March 11, 2013*

**math**

The breaking strength (in pounds) of a certain new synthetic is normally distributed with a mean of 175 and a variance of 4. The material is considered defective if the breaking strength is less than 170 pounds. What is the probability that a single, randomly selected piece of...
*March 10, 2013*

**Physics**

Your grandfather clock’s pendulum has a length of 0.9930 m. If the clock loses 95.6 seconds per day, by how many millimeters should you adjust the length of the pendulum?
*March 10, 2013*

**Physics**

What is the period of a simple pendulum 83 cm long on the Earth?
*March 10, 2013*

**Physics**

A pendulum has a period of 4.28 s on Earth. What is its period on Mars, where the acceleration of gravity is about 0.37 that on Earth?
*March 10, 2013*

**math**

Suppose that people's heights (in centimeters) are normally distributed, with a mean of 170 and a standard deviation of 5. We find the heights of 80 people. (a) How many would you expect to be between 170 and 175 cm tall? (b) How many would you expect to be taller than 179...
*March 10, 2013*

**Literature**

I'm doing a literary analysis of Mark Twain's "The Private History of a Campaign that Failed" and I'm having a hard time coming up with a good these statement... Any suggestions?
*March 6, 2013*

**probability**

the probability of drawing a club from a deck of card is 1/4 what are the odds in favor of drawing a club from an ordinary deck of cards?
*March 3, 2013*

**math**

An advertising agency conducted a survey and found that the number of units sold, N, is related to the amount 'a' spent on advertising (in dollars) by the following formula: N= 1,500 + 400 ln a ( a ¡Ý 1 ) How many units are sold after spending $ 1,000 (to ...
*March 3, 2013*

**math**

calculate the monthly finance charge for the credit card transaction. Assume that it takes 10 days for a payment to be received and recorded and that the month is 30 days long. ( round your answers to the nearest cent). $ 400 balance, 15%, $ 50 payment. A) previous balance ...
*March 3, 2013*

**math**

calculate the monthly finance charge for the credit card transaction. Assume that it takes 10 days for a payment to be received and recorded and that the month is 30 days long. ( round your answers to the nearest cent). $ 400 balance, 15%, $ 50 payment. A) previous balance ...
*March 3, 2013*

**math**

Classify the finacial problem. Assume a 7% interest rate compounded annually. Find the value of a $ 1,000 certificate in 4 years. a) sinking fund, b) ordinary annuity, c) future value, d) present value e) amortization
*March 3, 2013*

**math**

Classify the finacial problem. Assume a 7% interest rate compounded annually. Find the value of a $ 1,000 certificate in 4 years. a) sinking fund, b) ordinary annuity, c) future value, d) present value e) amortization.
*March 2, 2013*

**math**

Classify the finacial problem. Assume a 7% interest rate compounded annually. Find the value of a $ 1,000 certificate in 4 years. a) sinking fund, b) ordinary annuity, c) future value, d) present value e) amortization.
*March 2, 2013*

**math**

calculate the monthly finance charge for the credit card transaction. Assume that it takes 10 days for a payment to be received and recorded and that the month is 30 days long. ( round your answers to the nearest cent). $ 400 balance, 15%, $ 50 payment. A) previous balance ...
*March 2, 2013*

**math**

find the monthly payment fot the loan. $ 500 loan for 12 months at 13%
*March 2, 2013*

**math**

calculate the monthly finance charge for the credit card transaction. Assume that it takes 10 days for a payment to be received and recorded and that the month is 30 days long. ( round your answers to the nearest cent). $ 400 balance, 15%, $ 50 payment. A) previous balance ...
*March 2, 2013*

**Math**

3) Bobby Ray brought 14 gallons of green punch to a St Patrick’s Day party. He wanted to fill each cup with 2/3 of punch. How many people got a cup of punch? _______________
*February 28, 2013*

**us history**

How did the Supreme Court rule on the Indian Removal Act? is it Jackson's order to move the Indians west was unconstitutional. or The Indian Removal Act was unconstitutional.
*February 24, 2013*

**math**

Assume the car can be purchased for 0% down for 60 months (in lieu of rebate). A car with a sticker price of $42,500 with factory and dealer rebates of $5,100 (a) Find the monthly payment if financed for 60 months at 0% APR. (Round your answer to the nearest cent.) $ (b) Find ...
*February 24, 2013*

**us history**

plz someone give me the answer ive read m book over and over i cant find the answer to why is new orleans important
*February 23, 2013*

**math**

find the present value using the present value formula. Achieve $ 225,500 at 8.65% compounded continusly for 8 years 155 days
*February 23, 2013*

**math**

The sum of the digits of a positive two-digit number is 13,If twice the first digit is 1 less than the second digit,what is the two-digit number ?
*February 20, 2013*

**math**

Ohhhhh that makes much more sense thank you so just p/8 or p/8=x ?
*February 20, 2013*

**math**

that makes sense so it would be 8/p then?
*February 20, 2013*

**math**

YOU MULTIPLY! right..?
*February 20, 2013*

**math**

so is it 8 times x? 8*x?
*February 20, 2013*

**math**

The perimeter of a regular octagon is p. write an expression that represents the length of one side of the octagon?
*February 20, 2013*

**Math**

The total amount would equal $630. 100 x 5 = 500 10 x 13= 130 1 x 10= 10 ---- $640
*February 20, 2013*

**math**

find the present value using the present value formula. Achieve $ 225,500 at 8,95% compounded continuously for 8 years, 135 days.
*February 17, 2013*

**Spanish**

Answer the following question in Spanish..que pides muchas veces como Plato principal
*February 17, 2013*

**Math**

29.1
*February 17, 2013*

**history**

How mr andrew treat his workers
*February 7, 2013*

**math**

it is so hard
*February 6, 2013*

**English**

Is a suicide a solution for youth problems
*February 4, 2013*

**Algebra**

On a map 1/2 in=8 miles. What would the actual distance be if there 7 1/4 miles?
*January 29, 2013*