Wednesday

May 25, 2016
Total # Posts: 510

**Chemistry**

A 25.00 mL sample of a clear saturated solution of PbI2 requires 14.3 mL of a certain AgNO3(aq) for its titration. I^-(from satd PbI2)+ Ag^+(from AgNO3)= AgI(s) So, this is where I am. using the Ksp equation for PbI2: 7.1*10^-9=4x^3 solving for x gives me 0.00121 Giving the ...
*March 18, 2012*

**geometry**

a school playground is in the shape of a rectangle 500 feet long and a 100 feet wide if fencing cost 15 dollars per yard what will the cost be to place fencing around the playground ?
*March 1, 2012*

**physics**

a bus is moving downhill at a slope of 5 degree . at the moment when the speed of the bus is 30km/h,the driver spots a deer 30m ahead. he applies the brakes and comes to a stop. the is paralysed by fear and does not move.will the bus stops before reaching it or will it hit the...
*February 11, 2012*

**physics**

a plane is flying with a constant speed along a straight line at an angle 60degree with the horizontal. the weight(W) of the plane is 90,000N and its engine provides a thrust(T)of 120,000N in the direction of flight . two additional forces are exerted on the plane :the lift ...
*February 11, 2012*

**physics**

an airplane has a speed of 600km/h with respect to air. it has to fly a distance of 800km northward. in what direction should it fly if a steady wind is blowing at a speed of 120km/h from the west ? what will its speed with respect to the ground be? draw the relevant diagram ...
*February 11, 2012*

**chemistry**

How many grams of mercury are formed from 47.0 of HgO? How many grams of oxygen are formed from 47.0 of HgO? How many grams of HgO would you need to obtain 34.1 of O2?
*February 7, 2012*

**chemistry**

What mass of oxygen is needed for the complete combustion of 2.50×10−3 of methane?
*February 7, 2012*

**chemistry**

What mass of water is produced from the complete combustion of 2.50×10−3 of methane?
*February 7, 2012*

**chemistry**

What mass of carbon dioxide is produced from the complete combustion of 2.50×10−3 of methane?
*February 7, 2012*

**chemistry**

A scientist wants to make a solution of tribasic sodium phosphate,Na3PO4 , for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 550 ml of a solution that has a concentration of Na+ ions of 1.40M ?
*February 7, 2012*

**Chemistry**

1.29g H2 is allowed to react with 10.3g N2 , producing 1.86g NH3. What is the theoretical yield for this reaction under the given conditions? What is the percent yield for this reaction under the given conditions? I have been stucks for days now.
*February 7, 2012*

**physics**

.789m/s^2
*January 31, 2012*

**Geometry**

Find the area of a regular pentagon with a side of 6ft. Give the answer to the nearest tenth. 123.9ft2 49.5ft2 61.9ft2 12.4ft2
*January 23, 2012*

**Geometry**

Find the surface area of a conical grain storage tank that has a height of 42 meters and a diameter of 20 meters. Round the answer to the nearest square meter. 3,028m2 3,971m2 1,357m2 1,671m2
*January 23, 2012*

**Geometry**

Find the surface area of a sphere with a circumference of 40 ft. Round to the nearest tenth.
*January 23, 2012*

**precalc help**

cos(15degrees) this is not plugging it in the calculator, please help me right down steps. i really need help.
*January 23, 2012*

**Geometry**

Cylinger A has a radius of 1 m and a height of 4 m. Cylinder B has a radius of 2 m and a height of 4 m. Find the ratio of the volume of cylinder A to the volume of cylinder B. 5:6 1:4 1:2 1:1
*January 21, 2012*

**Geometry**

Find the surface area of a conical grain storage tank that has a height of 42 meters and a diameter of 20 meters. Round the answer to the nearest square meter. 3,028m2 3,971m2 1,357m2 1,671ma
*January 21, 2012*

**Geometry**

The volume of a sphere is 2,098pi m3. What is the surface area of the sphere to the nearest tenth? 1,700 m2 146.2 m2 850 m2 26,364 m2
*January 21, 2012*

**Geometry**

Find the similarity ratio of a cube with a volume 512 m3 to a cube with volume 3,375 m3. 8 : 15 64 : 225 15 : 8 225 : 64
*January 21, 2012*

**Geometry**

What is the equation of the circle with center (2, –5) that passes through the point (–2, 10)? (x – 2)2 + (y – (–5))2 = 25 (x – (–2))2 + (y – 10)2 = 241 (x – 2)2 + (y – (–5))2 = 241 (x – (–2))2 + (y – 10)2...
*January 21, 2012*

**Geometry**

The length of the hypotenuse of a 30°-60°-90° triangle is 7. Find the perimeter. 7/2+21/2sqrt3 21+7sqrt3 7+21sqrt3 21/2+7/25sqrt3
*January 20, 2012*

**Geometry**

Thank you so much this was complicated
*January 20, 2012*

**Geometry**

Kristen lives directly east of the park. The football field is directly south of the park. The library sits on the line formed between Kristen’s home and the football field at the exact point where an altitude to the right triangle formed by her home, the park, and the ...
*January 20, 2012*

**Geometry**

A triangle has side lengths of 18 cm, 80 cm, and 81 cm. Classify it as acute, obtuse, or right.
*January 20, 2012*

**geometry**

The volume of a sphere is 2,098 m3. What is the surface area of the sphere to the nearest tenth? 1,700m2 146.2m2 850m2 26,364m2
*January 12, 2012*

**math**

a school playground is in the shape of a rectangle 700 feet long and 200 feet wide. if fencing cost 20 dollars per yards what will it cost to place fencing around the playground
*January 11, 2012*

**Physics**

(a) From ground, h=2.30m so: PE=mgh =1.70kgx9.8m/sx2.30m = 38.3J (b)The person is shorter than the distance at which he holds the book from the ground so: 2.30-1.60=0.7m Use the same formula, just substitute 0.7 in for h. (c)The work in this case is the potential energy of the...
*December 7, 2011*

**geometry**

The sides of a parallelogram are 25 cms and 15 cms.The height to the 25 cms side is 15 cms.What is the speciality of this parallelogram ?
*November 30, 2011*

**physics**

The drawing shows a boat being pulled by two locomotives through a canal of length 2.50 km. The tension in each cable is 5.00 103 N, and è = 19.0°. What is the net work done on the boat by the two locomotives?
*November 16, 2011*

**math**

there are seven pies if i take away 2 1.3 how many are left
*October 20, 2011*

**English**

those sentences seem great to me. With num 3 use (able). Try also to make your sentences as interesting as possible.
*October 15, 2011*

**Precal**

Use the Law of Sines to solve for all possible triangles that satisfy the given conditions. (If an answer does not exist, enter DNE. Round your answers to one decimal place. Below, enter your answers so that A1 is smaller than A2.)
*October 10, 2011*

**Physics**

30.24m/s
*September 17, 2011*

**Intergrated Algebra**

I kinda forgot about radicals over the summer.What is Radical 79 over 3? How would you plot that?
*September 7, 2011*

**geometry**

find the value of x and bc if b is between c and d cb=4x-9 bd=3x+5 cd=17
*August 30, 2011*

**physics**

A 88-kg astronaut and a 1200-kg satellite are at rest relative to the space shuttle. The astronaut pushes on the satellite, giving it a speed of 0.25m/s directly away from the shuttle. Seven-and-a-half seconds later the astronaut comes into contact with the shuttle.What was ...
*August 20, 2011*

**college algebra**

A musician is planning to market a CD. The fixed costs are $1260 and the variable costs are $5 per CD. The wholesale price of the CD will be $11. For the artist to make a profit, revenues must be greater than costs. How many CDs, x, must be sold for the musician to break even?
*July 26, 2011*

**college algebra**

find a general term for the sequence a1,a2,a3,a4..... 15,23,31,39
*July 26, 2011*

**college algebra**

(x^2/3)^7/2 simplify and express answer using positive exponents only
*July 26, 2011*

**college algebra**

solve x^2e^x+9x^ex=0
*July 25, 2011*

**college algebra**

e^-3-1x+22=0
*July 25, 2011*

**college algebra**

find all vertical and horizontal asymptoles f(x)=4x/x^+1
*July 25, 2011*

**college algebra**

the population of a certain geographic region is approximately 105 million and grows continuously at a relative growth rate of 1.53%. what will the population be in 5 years?
*July 25, 2011*

**college algebra**

how long would it take $3,100 to grow to $8,800 if the annual rate is 3.5% and interest is compounded monthly? please help
*July 25, 2011*

**Pre Cal**

the function y= tan (x/3) has an x intercept at?
*July 24, 2011*

**persuasive essay **

An easy way to answere this is to go on word prosser then go to tools and get on spelling and grammer it works great. ash
*June 17, 2011*

**algebra1**

(2x^2+3x-15) divided by (x-3)
*June 7, 2011*

**math**

a class consists of 14 men and 16 women. A group of 5 is randomly chosen a) the probability of this group containing at least 2 women and at least 2 men? b) probability the group contains the same gender.
*June 5, 2011*

**College Mathmatics**

Fill in the blank with the correct symbol to make the resulting inequality true. 4 4/3____ 4 1/2 A-> B-< C-< (with a line under it) D-> (with a line under it)
*May 10, 2011*

**College Mathmatics**

Thank u so much, this is the 1st lesson in this class, and my 1st math lesson in college period, and im 26, so im a little out of the loop and extremely confused when it comes to math. Thank u so much. Would u mind explaining it to me pls?!
*May 10, 2011*

**College Mathmatics**

Multiply; then reduce to lowest terms: 5 1/2 . 3/4
*May 10, 2011*

**differential calculus**

use the product rule to find the derivatives of the given function y=(3x^2-8)^2
*April 30, 2011*

**business**

CheckPoint: Calculating Fixed Costs, Variable Costs, and Break-Even Point for a Program • Calculate the fixed cost, variable costs, and break-even point for the program suggested in Appendix D. • Base your calculations on the financial data for 2002. Appendix D. XYZ...
*April 22, 2011*

**accounting**

anyone please??
*April 10, 2011*

**accounting**

A company purchased $4,000 worth of merchandise. Transportation costs were an additional $350. The company later returned $250 worth of merchandise and paid the invoice within the 2% cash discount period. What is the total amount paid for this merchandise is?
*April 10, 2011*

**math(rate of change)**

how did it become 48?
*April 9, 2011*

**math(rate of change)**

nope im not :( and my teacher doesn't explain well...thank you! i've been trying to figure out how to come up with the asnwer but gosh i couldnt thank you again!
*April 9, 2011*

**math(rate of change)**

find the average rate of change f(x)=x^2 + 2x between x=0 and x=6 can anyone please help me explain why the answer is 8? thank you!
*April 9, 2011*

**linear programming app**

solve this linear programming problem; A chain saw requires 4 hours of assembly and a wood chipper 6 hours. A maximum of 48 hours of assembly time is available. The profit is $150 on a chain saw and $220 on a chipper. How many of each should be assembled for maximum profit?? ...
*April 6, 2011*

**physics**

0.26
*April 6, 2011*

**math**

solve this linear programming problem; A chain saw requires 4 hours of assembly and a wood chipper 6 hours. A maximum of 48 hours of assembly time is available. The profit is $150 on a chain saw and $220 on a chipper. How many of each should be assembled for maximum profit?? ...
*April 5, 2011*

** math**

1.632
*April 5, 2011*

**accounting**

Santa Fe Company purchased merchandise for resale from Mesa COmpany with an invoice price of $24,000 and credit terms of 3/10,n/60. The merchandise had cost Mesa $16,000. Santa Fe paid within the discount period. Prepare entries that Santa Fe Company should record for the ...
*April 4, 2011*

**linear programming app**

write the constraints as linear inequalities and identify all variables used. A canoe requires 8 hours of fabrication and a rowboat 5 hours. The fabrication department has at most 110 hours of labor available each week
*April 3, 2011*

**math i need help plz!**

A store sells televisions for $360 and video cassette recorders for $270. at the beginning of the week its entire stock is worth $45,990. During the week it sells three quarters of the televisions and one third of the video cassette recorders for a total of $27,630. How many ...
*March 29, 2011*

**math could anyone help me plz?:[**

wow! sure is. thanks so much sir! :]
*March 28, 2011*

**math could anyone help me plz?:[**

you have a $5841 credit card debt, and you plan to pay it off through monthly payments of $71. if you are being charged 14% interest per year, how long will it take you to repay your debt?
*March 28, 2011*

**math**

you have a $5841 credit card debt, and you plan to pay it off through monthly payments of $71. if you are being charged 14% interest per year, how long will it take you to repay your debt?
*March 28, 2011*

**math**

you have a $5841 credit card debt, and you plan to pay it off through monthly payments of $71. if you are being charged 14% interest per year, how long will it take you to repay your debt?
*March 27, 2011*

**math**

at the end of every 3 months, Rita deposits $100 into an account that pays 5% compounded quarterly. After 5 yrs, she puts the accumulated amount into a certificate of deposit paying 8.5% compounded semiannually for 1 yr. when this certificate matures, how much will Teresa have...
*March 27, 2011*

**algebra**

are you asking for the slope and y-intercept to graph slope= -3/5 and y-int=3
*March 27, 2011*

**math**

A system of equations can result in 3 possibilities: consistent, inconsistent, and dependent. Discuss each of these types of solution that can be generated, and describe the graph of each possibility.
*March 13, 2011*

**math**

If tow sides of a triangular flag are content, which of the following words can not be used describe the shape of the flag? a. Obtuse b. Acute c. Scalene d. Equilateral
*March 7, 2011*

**Math**

1/46656 How to figure this out? Go to: google Type in: Rolling 6 dice, what is the probability of rolling six of a kind? click on the first link which should be: What are the odds of rolling 6 of a kind on a six sided die...
*March 4, 2011*

**Physics**

A = v^2/r A = (1.70*10^4)^2/(5.30*10^6) A = 54.53 A = G(m/r^2) m = A*r^2/G G = 6.67*10^-11 m = 54.53*(5.30*10^6)^2/6.67*10^-11 m = 2.30*10^25 ------------------------------------ A = G(m/r^2) A = 6.67*10^-11(2.30*10^25/(8.70*10^6)^2) A = 20.27 A = v^2/r (A*r)^(1/2) = v v = ...
*March 4, 2011*

**Physics**

Newton's law of universal gravitation: where force equals the universal constant of gravity multiplied by mass of the earth and mass of an object divided by the raduis squared F = G((m1*m2)/(r^2)) Force equals the mass of an object multiplied by the acceleration or 'g...
*February 24, 2011*

**world history**

what was the first hr on the titanic atmoshere like
*February 23, 2011*

**Physics**

A 37 kg child roller skates, initially at rest, rolls 2.0 m down an incline at an angle of 17 degrees with the horizontal. If there's no friction, what is the kinetic energy of the child at the bottom of the incline?
*February 3, 2011*

**Physics**

A 37 kg child roller skates, initially at rest, rolls 2.0 m down an incline at an angle of 17 degrees with the horizontal. If there's no friction, what is the kinetic energy of the child at the bottom of the incline?
*February 3, 2011*

**Physics**

What is the average power output of a weightlifter who can lift 260 kg to a height of 1.9 m in 1.8 seconds?
*February 3, 2011*

**Physics**

A 37 kg child roller skates, initially at rest, rolls 2.0 m down an incline at an angle of 17 degrees with the horizontal. If there's no friction, what is the kinetic energy of the child at the bottom of the incline?
*February 3, 2011*

**algrebra 1**

The difference of 5 times a number is 27. Which equation below can be used to mind the unknown number?
*February 3, 2011*

**Math**

A 100 foot vertical tower is to be erected on a side of a hill that makes a 6 degree angle with the horizontal. Find the length of each of the two guy wires that will be anchored 75 feet uphill and downhill from the base of the tower.
*February 2, 2011*

**math**

A 100 foot vertical tower is to be erected on a side of a hill that makes a 6 degree angle with the horizontal. Find the length of each of the two guy wires that will be anchored 75 feet uphill and downhill from the base of the tower.
*February 2, 2011*

**Math- Please Help!!**

A 100 foot vertical tower is to be erected on a side of a hill that makes a 6 degree angle with the horizontal. Find the length of each of the two guy wires that will be anchored 75 feet uphill and downhill from the base of the tower.
*February 2, 2011*

**Math**

A 100 foot vertical tower is to be erected on a side of a hill that makes a 6 degree angle with the horizontal. Find the length of each of the two guy wires that will be anchored 75 feet uphill and downhill from the base of the tower.
*February 2, 2011*

**Math**

A 100 foot vertical tower is to be erected on a side of a hill that makes a 6 degree angle with the horizontal. Find the length of each of the two guy wires that will be anchored 75 feet uphill and downhill from the base of the tower.
*February 1, 2011*

**College Chem PLEASE HELP**

A 3.50 liter ballooncontains air at 65% relative humidity at 22 degrees C at 1.0 atm pressure. A small peice of Na metal is introduced to the balloon to remove all of the water vapor. What would the new volume be for the dry air in the balloon?
*January 31, 2011*

**chemistry**

e. copper ions, nitrate ions, and water. a and b are eliminated because copper and nitrate turn out to be aqueous due to solubility rules. that leaves you with b, c, and e. with these types of problems, you'll never end up with electrons as the answer, it'll only ask ...
*January 28, 2011*

**statistics**

what is average for the following numbers 65 49 24 15
*January 26, 2011*

**English**

What is the theme of "Abalone, Abalone, Abalone" by Toshio Mori?
*January 23, 2011*

**trig**

It is false. The smaller angle can have a greater value.
*January 20, 2011*

**physics**

Thanks!I get it now. I had gotten the normal force, but I wasnt sure how to get the force of friction, but this helps.
*January 20, 2011*

**physics**

A couch with a mass of 100 kg is placed on an adjustable ramp attached to a truck. As one end raises, the couch begins to move downward. If it sldes with an acceleration of .79 m/s^2 at 12 degrees, what is the coefficient of kinetic friction. I still am having troubles with ...
*January 20, 2011*

**Physics**

Ok, thats what I got but I wasnt sure if it was correct. Thanks so much!
*January 20, 2011*

**Physics**

Someone attaches a 27 kg bale of hay to one end of a rope passing over a frictionless pulley connected to a beam in a hay barn. Someone else pull down on the opposite en of the rope with a force of 397 N. Ignoring the mass of the rope, what will be the magnitude and directionf...
*January 20, 2011*

**Physics**

I dont think I did it correctly. I got a very very small number.
*January 20, 2011*

**Physics**

A coach with a mass of 100 kg is placed on an adjustable ramp attached to a truck. As one end raises, the couch begins to move downward. If it sldes with an acceleration of .79 m/s^2 at 12 degrees, what is the coefficient of kinetic friction. I think I found the normal force, ...
*January 20, 2011*

**english**

this is not unethical. There is no ethical boundary, per se, for advising another co-worker of their work practices. An ethical issue may arise however if I shared that information with that co-worker and I wasn’t supposed to know /share (ie. a supervisor told me in ...
*January 19, 2011*