Wednesday

October 1, 2014

October 1, 2014

Number of results: 8,175

**geometry**

how much water can be held by a cylindrical tank with a radius of 12 feet and a height of 30 feet? is it 33912 cubic feet? or perhaps 2260.8 cubic feet?
*June 15, 2011 by danna*

**statistics**

Given the length an athlete throws a hammer is a normal random variable with mean 50 feet and standard deviation 5 feet, what is the probability he throws it between 50 feet and 60 feet?
*October 19, 2012 by Alex*

**chemistry urgent**

what volume in liters of gaseous hydrogen chloride can be prepared from 40.0 liters of hydrogen with an exces of chlorine? all volumes are measured at STP: H + Cl -> HCl
*November 30, 2010 by lianne*

**MATH**

The length of the house is 50 feet, the width is 30 feet, and from the ground to the gable (the height of the rectangle) is 10 feet. The height of the triangular prism on top is 6.5 feet.
*June 30, 2011 by Anonymous*

**ymous**

You're standing 14 feet from the edge of a cylindrical water tank and is 26 feet from the point of tangency. the tank is 10 feet tall. what is the volume in cubic feet
*March 8, 2012 by anon*

**math**

A Dolphin is 30 feet below the surface of the water. She rised 23 feet, sinks 17 feet, and finally rises another 27 feet. If there are no other changes, the dolphin is
*June 2, 2012 by felicia*

**math**

how many liters of water must be added to 30 liters of a 20% alcohol solution to dilute it to a 15% solution?
*April 6, 2010 by Dawn*

**math**

how many liters of water must be added to 30 liters of a 20% alcohol solution to dilute it to a 15% solution?
*April 6, 2010 by Dawn*

**math**

how many liters of water must be added to 30 liters of a 20% alcohol solution to dilute it to a 15% solution?
*April 6, 2010 by Anonymous*

**Math**

How many liters of water should be added to 20 liters of 40% solution of acid to obtain 30% solution?
*June 27, 2011 by Daniel*

**AP Chem**

How many liters of H2 have the same number of molecules as 1.00 liters of 02? ( At the same temperature and pressure)
*October 16, 2013 by Josh*

**Math**

Tressa's closet is 5 feet long, 4 feet wide, and 7 feet high. What is the volume of Tressa's closet. A. 140 feet B. 140 square feet C. 140 cubic feet
*February 20, 2014 by Crystal*

**Algebra**

How many square feet of grass are there on a trapezoidal field with a height of 75 feet and bases of 125 feet and 81 feet. I know the formula is A = h( b + b) / 2 A = 75 ( 125 + 81) / 2 A = 75 ( 206 ) /2
*August 13, 2014 by Cole*

**12th grade**

gaseous ammonia is made by the following reaction: N2+3H2 - 2NH3. if you start with 7 liters on nitrogen gas, how many liters of hydrogen are needed for a chemical reaction?
*June 14, 2010 by Anonymous*

**Chemistry**

1.50 liters tank filled with helium at 125 atm is used to fill balloons. The pressure in each balloon is 950 torr and the volume of each is 1.20 liters. How many ballons can be filled?
*September 8, 2010 by Alex Yoo*

**AP Chemistry **

How much work is done by the system when 2.00 moles of O2 expand from a volume of 3.00 liters to a volume of 8.5 liters against a constant external pressure of 0.0100 atm? Answer in units of J.
*December 4, 2011 by Ashlyn*

**ap chemistry**

How much work is done by the system when 2.00 moles of O2 expand from a volume of 3.00 liters to a volume of 8.1 liters against a constant external pressure of 0.0100 atm? Answer in units of J
*October 31, 2012 by cheri*

**AP calculus AB**

Water pours out of a conical tank of height 10 feet and radius 4 feet at a rate of 10 cubic feet per minute. How fast is the water level changing when it is 5 feet high?
*December 29, 2010 by jennifer*

**Precalculus help fast**

a farmer has available 1032 feet of fencing and wishes to enclose a rectangular area. If x represents the width of the rectangle for what value of x is the area the largest A) 256.5 feet b) 258 feet c) 256 feet d) 257 feet please show work! i need help fast
*March 29, 2010 by Arielt*

**Math**

Julie is digging a square area in her backyard for a vegetable garden. If the area is 52 square feet, what is the approximate length of one side of her garden? 6 square feet 7 square feet 8 square feet 9 square feet 7 square feet is my answer, what's yours?
*October 22, 2012 by Math*

**radical expressions**

3 cubed square root of negative 432 What gets cubed? The 3 or "the square root of negative 432" ? If you mean 3^3 * sqrt (-432), the answer is 561.18 i, where i = sqrt (-1).
*February 27, 2007 by Anonymous*

**math**

the dimensions of a rectangular prism are height 7 feet, width 4 feet and length 3 feet find the surface area part 2: dimensions of the cylinder are height 7 feet and radius 3.5 feet solve with a decimal then round to the nearest half foot. part 3 you have 1 gallon of paint ...
*November 27, 2010 by kim*

**Physics Help!!!**

The water in your bathtub is getting cold. You currently have 36 liters at 31°C. What is the new temperature after you add 10 liters of 70°C hot water? Degrees Celsius are entered as degC.
*November 8, 2010 by Ryan*

**ap chemistry ! i am so lost**

how much work is done by the system when 2.00 moles of O2 expand from a volume of 3.00 liters to a volume of 5.8 liters against a constant external pressure of 0.0100 atm? answer in units of J
*October 18, 2012 by bridget*

**ap chemistry ! i am so lost**

how much work is done by the system when 2.00 moles of O2 expand from a volume of 3.00 liters to a volume of 5.8 liters against a constant external pressure of 0.0100 atm? answer in units of J
*October 18, 2012 by bridget*

**AP Chemistry**

How much work is done by the system when 2.00 moles of O2 expand from a volume of 3.00 liters to a volume of 9.6 liters against a constant external pressure of 0.0100 atm answer in units of joules
*October 11, 2013 by Gabriella*

**math**

A submarine at an elevation of -35 feet rises 35 feet. What is the elevation of the submarine after it rises? a. -70 feet b. 0 feet c. 35 feet d. 70 feet please answer and explain
*April 17, 2014 by thomas*

**related rates problems**

Water pours out of a conical tank of height 10 feet and radius 4 feet at a rate of 10 cubic feet per minute. How fast is the water level changing when it is 5 feet high?
*December 30, 2010 by elizabeth*

**Math**

I need help atleast an equation to get started please A lab assisstant wants to make five liters of 27.8% acid solution. If solutions of 50% and 13% are in stock, how many liters of each must be mixed to prepare the solution.
*May 12, 2012 by Janine*

**Mathematics**

Q1.A man earn $1200 and spends $450 per month.Find ratio of (a)His income to his expenditure and (b)His savings to his income Q2.An open water tank with length 20 cm and width 15 cm holds 4.8 liters of water.calculate the height of the water level tank and the total surface ...
*May 14, 2011 by Envy Green*

**Math**

A baseball player hits a pitch when the ball is 2 feet off the ground. Two hundred feet from the plate, the ball reaches its maximum height of 82 feet. Will the ball clear the home run wall that is 10 feet high and 380 feet from home plate?
*January 1, 2011 by Morgan*

**math**

a baseball player hits sa pitch when the ball is 2 feet off the ground. two hundred feet from the plate, the ball reaches its maximum height of 82 feet. will the ball clear the home run wall that is 10 feet high and 380 feet from home plate?
*January 3, 2011 by Lindsey*

**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)? A. 8 square feet ...
*August 6, 2013 by DD Girl*

**factoring cubes**

how to factor x^3-27 well since 27 is a perfect cube and so is x^3 wouldn't the answer be x-3? no, its something like (2x-3)(?x^2+?X+?) i dont know how to figure all the parts out. Here's the format for the difference between two cubes: (a - b)(a^2 + ba + b^2) = a^3 - b^3. ...
*January 18, 2007 by Linds*

**AP Chemistry**

What is the value of w (work) when 2.6 moles of H2 expands from 25 liters to 50 liters against a constant external pressure of 1 atm, then expands further from 50 to 100 liters against a constant external pressure of 0.1 atm? Answer in calories. Answer in units of cal.
*October 5, 2010 by Nick*

**ap chemistry**

What is the value of w (work) when 1.3 moles of H2 expands from 25 liters to 50 liters against a constant external pressure of 1 atm, then expands further from 50 to 100 liters against a constant external pressure of 0.1 atm? Answer in calories. Answer in units of cal
*October 31, 2012 by cheri*

**Calculus**

A swimming pool is 40 feet long, 20 feet wide, 8 feet deep at the deep end, and 3 feet deep at the shallow end; the bottom is rectangular. If the pool is filled by pumping water into it at the rate of 40 cubic feet per minute, how fast is the water level rising when it is 3 ...
*March 2, 2012 by Casey*

**Math**

A swimming pool is 40 feet long, 20 feet wide, 8 feet deep at the deep end, and 3 feet deep at the shallow end; the bottom is rectangular. If the pool is filled by pumping water into it at the rate of 40 cubic feet per minute, how fast is the water level rising when it is 3 ...
*March 2, 2012 by Greg*

**math**

Shela's room is 16 feet by 8 feet. If she is buying carpet squares that are 2 feet by 2 feet, how many squares does she need to purchase?
*May 11, 2012 by EH*

**Algebra**

Owners of a recreation area are filling a small pond with water. They are adding water at a rate of 25 liters per minute. There are 700 liters in the pond to start. Let W represent the amount of water in the pond (in liters), and let T represent the number of minutes that ...
*May 12, 2011 by Rachal*

**math help**

A lab assistant wants to make FIVE LITERS of 31.2% acid solution. If solutions of 40% and 18% are in stock, how many liters of each must be mixed to prepare the solution. i dont even know what equation to use or anything, please help me, thank you.
*March 29, 2012 by amy *

**Chemistry**

Calculate the density of a substance in pennyweights per peck that has a volume of 0.371 hogsheads and a mass of 41.6 kg. 1 pennyweight = 1.55 grams 1 hogshead = 238.5 liters 1 peck = 9.091 liters. Answer in units of pw/pk.
*September 27, 2012 by Peter*

**chem **

A sample of sulfur hexafluoride gas (SF6) occupies a volume of 1.200 Liters at 7.067 x 101 oC. Assuming the pressure is constant, what will the final temperature be (in o C) if the volume is increased to 7.110 Liters?
*April 15, 2013 by will.i.am*

**math**

A school is soundproofing a band room with insulating tiles. The room is rectangular and is 30 feet long, 40 feet wide, and 12 feet high. All four walls, the floor and the ceiling will be covered, but a window that is 10 feet long by 4 feet high will not be covered. How many ...
*April 12, 2009 by Anonymous*

**Math**

A hole shaped like a rectangular prism is 3 feet wide, 5 feet long, and 3 feet deep. If the hole is made 2 feet deeper, how much will the volume of the hole increase? V=45+2= 47
*February 4, 2014 by Jerald*

**Algebra- I get 1 out of two parts**

Owners of a recreation area are filling a small pond with water. They are adding water at a rate of 25 liters per minute. There are 700 liters in the pond to start. Let W represent the amount of water in the pond (in liters), and let T represent the number of minutes that ...
*May 11, 2011 by Rachal*

**Math**

The public library has an aquarium in the shape of arectangle prism . The base is 6 feet by 2.5 feet and the height is 4 feet . How many square feet of glass were used to build the aquarium (the top of the aquarium is open).
*April 26, 2014 by Anabelle*

**Math Inequalities**

One canned juice drink is 25% orange juice another is 5% orange juice. How many liters of each should be mixed together in order to get 20L that is 24% orange juice? How many liters of the 25% orange juice should be in mixture? How many liters of the 5% orange juice should be ...
*November 5, 2009 by Anna*

**algebra**

You are standing 14 feet from the edge of a cylindrical water tank and 26 feet from a point of tangency. The tank is 10 feet tall. What is the volume of the tank in cubic feet?
*March 13, 2011 by Sarah*

**math**

A 13-foot ladder is placed against a wall. If the ladder cannot be placed at a slope less than 2.4, what is the minimum height of the wall? A.5 feet B.12 feet C.20 feet D.13 feet E.8 feet
*August 22, 2011 by Anonymous*

**math**

The Rossi family wants to install new tiles on the floor on their kitchen. The tiles they plan to use are 3 in x 3 in squares. The floor space to be covered is shown in the diagram below with measurements given in feet. How many square tiles will the Rossi family need to cover...
*September 10, 2007 by Robert*

**math**

Shelly sews a blanket that has an area of 170 square feet. it has 30 square blocks, each the same size. What is the approximate length of each side of a block. a. 1 foot b. 2 feet c. 3 feet d. 4 feet I doubled checked and the problem is correct. I just can't figure it out.
*October 30, 2012 by Larry*

**algebra **

A pharmacist has 40% and 60% iodine solutions on hand. How many liters of each iodine solution will be required to produce 4 liters of a 50% iodine.
*January 21, 2013 by juan*

**math**

how many liters of a 5% solution of salt should be added to a 25% solution in order to obtain 1120 liters of a 22% solution
*January 17, 2014 by ez*

**chemistry**

A sample of one liquid has a mass of 60 grams and a volume of 50 centimeters cubed; a sample of a second liquid has a mass of 30 grams and a volume of 40 centimeters cubed. They are put in a container and mixed. Can you determine what the mass and the volume of the mixture is?
*October 12, 2012 by Ann*

**Geometry**

A gallon of paint costs $20 and covers 465 square feet. Three coats of paint are recommended for even coverage. The room to be painted is 12 feet high, 20 feet long, and 20 feet wide. How many gallons are needed to paint the walls?
*May 4, 2011 by Need Help*

**math**

a plumber has 12 1/2 feet of plastic pipe he uses 3 2/8 feet for the sink line and 5 3/4 feet for the washing machine . he needs approximately 3 1/2 feet for a disposal. does he have enough pipe left for a disposal?
*July 10, 2013 by LESLIE*

**math**

2. Assume you working on the house pictured below. The length of the house is 50 feet, the width is 30 feet, and from the ground to the gable (the height of the rectangle) is 10 feet. The height of the triangular prism on top is 6.5 feet.
*September 20, 2013 by m*

**Calculus**

A conical vessel is 12 feet across the top and 15 feet deep. If it contains a liquid weighing ñ lbs/ft^3 to a depth of 10 feet. Find the work done in pumping the liquid to a height of 3 feet above the vessel.
*September 12, 2010 by Denise*

**Geometry**

A person who is 5 feet, 6 inches (5.6 feet) tall casts a shadow (from N to S) that is 12 feet long. The distance along the ground from the person (N) to the flagpole (G) is 18 feet. Find the height of the flagpole (FG) showing all calculations.
*January 17, 2014 by David*

**math**

a diving board is 4 feet above a pool that is 15 feet deep. The total length of a person's dive is 10 feet. How many feet below the surfac of the water did the person dive
*August 6, 2012 by joe *

**math**

Received an order for 3 Liters of 0.9% NsCl to be infused by an infusion set rate at 60gtt/ml set at 60gtt/min. How long will it take to infuse the 3 liters of fluid?
*November 10, 2012 by Denyse*

**Algebra 2**

How many liters of water must be added to 8 liters of a 40% acid solution to obtain a 10% acid solution? Please Show All Work!
*October 18, 2009 by Trisan*

**MATH**

Pewee adds two liters of pure alcohol to a 30% solution of alcohol in water. If the new concentration is 40%, how many liters of the original solution were there?
*May 26, 2010 by Veronica*

**pharmacy tech **

A certain mixture calls for 6mg of amoxycillin to 15 liters of water How many liters of water would you need for 12mg of amoxycillin?
*December 29, 2010 by Robyn*

**Math**

A pot contains 6 liters of brine at a concentration of 120g/l. How many liters of the water should be boiled off so that concentration of the brine is 200g/l.
*January 31, 2013 by Barry*

**geometry**

A person who is 5 feet, 6 inches (5.5 feet) tall casts a shadow (from N to S) that is 12 feet long. The distance along the ground from the person (N) to the flagpole (G) is 18 feet. Find the height of the flagpole (FG) showing all calculations. What is the length of SP and PF?
*January 14, 2014 by David*

**math**

The approximate distance, s, in feet that an object falls in t seconds when dropped from a height is obtained by use of the tormula s = 16r^2. In 8 seconds, the object will fall A. 15384 feet B. 1024 feet C. 256 feet D. None of these
*August 8, 2014 by Kitty*

**Math**

Mandy's kitchen measures eight feet by seven feet. If she is making a scale drawing of one inch = two feet, how many inches will she use for eight feet? How many inches will Mandy use for seven feet?
*April 10, 2012 by please help me!!*

**College Chem**

How many liters of carbon dioxide at 20 oC and 750 torr are produced when one gallon of toluene is burned? Convert liters to milliliters and then to grams. can you convert mil to grams?
*October 3, 2010 by Dan*

**pharmacy**

A CERTAIN MIXTURE CALLS FOR 6MG OF AMOXYCILLIN TO 15 LITERS OF WATER.? HOW MANY LITERS OF WATER WOULD YOU NEED FOR 12MG OF AMOXYCILLIN?
*August 15, 2010 by Mely*

**math**

A certain mixture calls for 6mg of amoxycillin to 15 liters of water. How many liters of water would you need for 12mg of amoxycillin?
*September 15, 2012 by kayla*

**Math (geometry)**

A diagonal of one cube is 2 cm. A diagonal of another cube is 4*sqrt3 cm. The larger cube has volume 64 cubic cm. Find the volume of the smaller cube. --------------------------------------------------------------------------------------------------- There was this theorem ...
*April 3, 2008 by Emily*

**math**

Harry planned a rectangular garden that was 40 feet long and 10 feet wide. A. What was the perimeter, in feet, of the garden that Harry planned? B. What was the area in square feet, of the garden that Harry planned? C. Suppose Harry decided to change the shape of his garden to...
*April 22, 2013 by Anonymous*

**algebra**

A dehydrated patient needs a 2.6% saline IV. Unfortunately, the hospital only has bags of 8% and 2% saline solutions. How many liters of each of these solutions should be mixed together to yield 2 liters of the desired concentration?
*November 17, 2010 by June*

**algebra**

A dehydrated patient needs a 7.9% saline IV. Unfortunately, the hospital only has bags of 3% and 10% saline solutions. How many liters of each of these solutions should be mixed together to yield 3 liters of the desired concentration?
*January 23, 2011 by lisa*

**algebra**

A dehydrated patient needs a 7.9% saline IV. Unfortunately, the hospital only has bags of 3% and 10% saline solutions. How many liters of each of these solutions should be mixed together to yield 3 liters of the desired concentration?
*January 23, 2011 by lisa*

**algebra**

A dehydrated patient needs a 7.9% saline IV. Unfortunately, the hospital only has bags of 3% and 10% saline solutions. How many liters of each of these solutions should be mixed together to yield 3 liters of the desired concentration?
*January 23, 2011 by lisa*

**algebra**

A dehydrated patient needs a 3.82% saline IV. Unfortunately, the hospital only has bags of 4% and 3% saline solutions. How many liters of each of these solutions should be mixed together to yield 5 liters of the desired concentration?
*February 22, 2011 by Joel*

**math**

A storage area measures 15.6 feet by 10.2 feet by 8.5 feet. If it is 1/3 full, how many cubic feet of storage space remains (rounded to the nearest cubic foot)?
*July 12, 2012 by lamedia*

**Chemistry**

A gas sample has an initial volume of 4.5 liters at a pressure of 731 mmHg. If the volume is increased to 8.9 liters, what is the pressure?
*April 8, 2012 by B*

**math**

Mike would like to enlarge his rectangular front yard which is currently 80 feet by 40 feet. He can only extend the width and length by 5x feet. If x = 7 feet, what will be the increase in area of the front yard? How can this problem be raised to a higher level of complexity?
*January 5, 2011 by ayisha*

**math**

Each ostrich needs a pen about 20 feet by 10 feet.How many square feet of space will be needed by 11 ostriches.
*September 23, 2010 by dylan*

**Pre-calc**

A racetrack is in the shape of an ellipse, 80 feet long and 40 feet wide. What is the width 10 feet from the end?
*May 11, 2011 by Deanna*

**algebra**

find the total number of feet of wood needed if the trellis is 8 feet tall and 2 feet wide.
*August 1, 2012 by cynthia*

**math**

how munch sand in cubic feet for a sandbox 6 inches high 3 feet wide 3 feet long
*March 4, 2013 by haley*

**math**

a drapery panel measures 6 feet by 10 feet. Find how many square feet of material are needed for eight panels?
*September 1, 2013 by Alice*

**Math**

If you dive 17 feet below water, ascend 5 feet, descend another 16 feet what is the total distance you dove?
*November 25, 2013 by Mary*

**math**

how many cubic feet of water are in a waterbed that is 6 feet long, 5 feet wide, and 1/2 foot high?
*June 28, 2009 by bibiana*

**math**

Find the volume in cubic feet of the right rectangular prism measuring 3 1/2 by 8 feet by 2 3/8 feet
*July 20, 2012 by janet*

**math**

a panel measures 6 feet by 9 feet. How many square feet of material are needed for four panels?
*January 26, 2014 by Anonymous*

**Math**

If it costs $75 to install 40 feet of fencing, how much does it cost to fence a rectangular garden that measures 12 feet by 16 feet?
*September 24, 2012 by Rox*

**Geometry**

If mAB = 324 feet, mBC = 103 feet, and mCD = 212 feet, what is the distance across the pond?
*November 25, 2013 by Mary*

**Chemistry**

"The analyzer said that at 20degreesC the unknown gas was 82.8% carbon by weight and 17.2% hydrogen. The analyzer also diffused the gas through a special apparatus and measured the rate of its diffusion compared to how fast oxygen gas diffused under the same conditions. The ...
*January 17, 2011 by Anonymous*

**Chemistry**

"The analyzer said that at 20degreesC the unknown gas was 82.8% carbon by weight and 17.2% hydrogen. The analyzer also diffused the gas through a special apparatus and measured the rate of its diffusion compared to how fast oxygen gas diffused under the same conditions. The ...
*January 17, 2011 by Anonymous*

**Physics Conservation of Energy**

A car traveling at 20 miles/hour stops in a distance of 15 feet when its brakes are locked. Assuming that the frictional force doesn't depend on speed, that same car traveling at 60 miles/hour will stop in a distance closest to a. 15 feet b. 45 feet c. 90 feet d. 135 feet My ...
*June 13, 2011 by Casey*

**mathFormula**

Formula for calculating cubic feet. length(in feet) x width(in feet) x height(in feet) = volume in cubic feet. Thank you DrBob That's for a cube or four sided regular figures. For a cylinder, it's pi*(radius2)*height and there are other formulas for other figures.
*August 20, 2007 by Richard*

**6th grade math**

the rectangulr backyard measures 131 feet by 52 feet. the garden measures 13 feet by 9 feet. what is the area of the backyard that will be grass.
*March 21, 2011 by Sally*

**math**

A ball dropped 16 feet. The height of each bounce of the ball is 8 feet, 4 feet, 2 feet and so on. How high will the sixth bounce be show all of your work
*February 12, 2013 by lee*

**math/209**

Mike would like to enlarge his rectangular front yard which is currently 80 feet by 40 feet. He can only extend the width and length by 5x feet. If x = 7 feet, what will be the increase in area of the front yard? How can this problem be raised to a higher level of complexity
*October 27, 2010 by wilfredo*

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