Sunday

December 21, 2014

December 21, 2014

Total # Posts: 1,662

**Physics**

An elevator has a combined mass of 1700kg. Find the tension of the supporting cable when the elevator, originally moving downward at 13 m/s, is brought to rest with constant acceleration in a distance of 44 m.
*October 5, 2013*

**college physics**

An object acted on by three forces moves with constant velocity. One force acting on the object is in the positive x direction and has a magnitude of 6.4N ; a second force has a magnitude of 5.0N and points in the negative y direction.
*September 29, 2013*

**Calculus**

Use integration by parts to evaluate the integral xsqrt(2x+6)dx.
*September 26, 2013*

**Calculus**

Evaluate the Integral (x^5sqrt(10+x^6))dx by making a u-substitution.
*September 26, 2013*

**Chemistry**

Thank you!
*September 25, 2013*

**Chemistry**

Combustion of a 0.1595 g of menthol (156 g/mol) produces .449 g of Carbon Dioxide and 0.184 g of Water. What is the formula of menthol? I am really confused as to where to start. I converted the Carbon Dioxide and Water to moles and got .102 mol for both of them but now I don...
*September 25, 2013*

**Geometry **

Line BD bisects angle ABC. Angle ABC= 9x. Angle ABD= 4x+13. Finds angle DBC
*September 23, 2013*

**math**

is -2.1 a rational number
*September 17, 2013*

**math**

What is the fraction as a percent 7/800? I divided 7 by 800 and got 0.00875 and moved the decimal two places to the right, would that be right .875% ?
*September 15, 2013*

**math**

Write the mixed number as a percent 6 ¾ Would it be 6(0.75) = 45% ?
*September 15, 2013*

**math**

disregard the last question 1.9% is correct :) thanks
*September 15, 2013*

**math**

1.9% that's what I got after moving the decimal point two times to the right...
*September 15, 2013*

**math**

so 19%?
*September 15, 2013*

**math**

Data collected from those who reported their credit card debt showed that the lowest average annual percentage rate on its credit cards was 0.019. Represent this as a percent. The lowest APR on its credit cars was __% ?
*September 15, 2013*

**math**

thanx so much Ms. Sue
*September 15, 2013*

**math**

and 0.43 as well as 2.88
*September 15, 2013*

**math**

How do I write this decimal, 0.44 as a percent?
*September 15, 2013*

**Macroeconomics**

Thnx
*September 14, 2013*

**Macroeconomics**

What is the household vs. the firm?
*September 14, 2013*

**Macroeconomics**

Thnx
*September 14, 2013*

**Macroeconomics**

What is the significance of consumer sovereignty?
*September 14, 2013*

**Chemistry please help**

An Ap student got a lab report back with "-4.5 % error" written in red on it. He had found the boiling point of an unknown liquid to be 45 C. What is the correct boiling point of his unknown liquid? I know first I would write -4.5 % error = |4.5-x|/x x 100 but I don...
*September 12, 2013*

**math**

you are going to open a certificate of deposit $500 for 3 years with 2% interest. another bank offers a CD in which you must deposit $250 for 4 years with 3% interest. Which CD will earn more interest.
*September 9, 2013*

**math**

you are responsible for buying supplies for an upcoming camping trip. you can buy packages of stew that just need water added and then are heated. Each package costs $4.95 and contains enough stew for 2 people. You need to buy enough packages so that you can have stew for 3 ...
*September 9, 2013*

**math**

you are responsible for buying supplies for an upcoming camping trip. you can buy packages of stew that just need water added and then are heated. Each package costs $4.95 and contains enough stew for 2 people. You need to buy enough packages so that you can have stew for 3 ...
*September 9, 2013*

**Math**

You installed a bookshelf on the wall to organize some of your books. The books that you absolutely want on the shelf weigh a total 6 3/4 pounds. The bookshelf can handle no more than 9 pounds. You plan on filling the rest of the shelf with your paperbacks that each weigh ...
*September 9, 2013*

**Physics**

I have really been struggling with this one and have come up with a wide variety of answers. Any help would be great: If the radius of a planet is larger than that of Earth by a factor of 8.25, how much bigger is the surface area of the planet than Earth’s?
*September 8, 2013*

**Physics**

I have really been struggling with this one and have come up with a wide variety of answers. Any help would be great: If the radius of a planet is larger than that of Earth by a factor of 8.25, how much bigger is the surface area of the planet than Earth’s?
*September 8, 2013*

**Algebra 1 **

William, a logistician, needs to route a freight train that is 20 feet at its tallest point and 10 feet at its widest point within 3 days. The most direct path includes a single-track tunnel that needs 24 hour notice prior to use. If the tunnel is roughly modeled by f(x)=-0.1x...
*September 6, 2013*

**chemistry**

An experiment requires 13.0\({\rm g}\) of cyclohexane, whose density at 25 \(^\circ {\rm C}\) is 0.7781 \({\rm g/mL}\). What volume of cyclohexane should be used?
*September 6, 2013*

**algebra 1**

I think not sure Rate of change = change of amount in account/change of amount in time 800-1050/2-9=-250/-7 negatives cancel =$35.71 However $35.71x7+800=1049.97 so does the problem ask to round?
*September 6, 2013*

**algebra**

you buy a storage rack that holds 40 cds. you have 27 cds. write an inequality that describes how many more cds you can hold. you buy 15 cds. will they all still fit?
*September 6, 2013*

**Geography**

That's a good answer and not only used in manufacturing but also used to serve the public.
*September 5, 2013*

**math(Ms.Sue)**

38/6=6.3 gallons in each bucket
*September 5, 2013*

**Algebra 1 urgent **

(a) The surface area of the prism shown is 314 square meters. Write an equation that u can solve to find the value of w. side a=wm b=8m and c=(w+4)m (on the picture) I'm guessing u use the formula surface area=2ab+2bc+2ac??? Well if so I need all that solved into y=ax*2+bx...
*September 5, 2013*

**Social Studies**

The guy is PLANING to buy the oven so he's probably already budgeted it.
*September 5, 2013*

**Social Studies**

Hhhmmm I'm not sure but d is a good answer because the oven has to fit well.
*September 5, 2013*

**Algebra 1 parabola's**

Thanks so much!!!
*September 5, 2013*

**current events health care reform**

From what I know (which is probably not much) when u get a new job they will either have health care plans that may be free or you will get a discounted price VS. buying u'r own health insurance that will come out of u'r pay check. If the job offers no health benefits ...
*September 5, 2013*

**Chemistry**

Thank you!
*August 19, 2013*

**Chemistry**

What's the difference between relative and percentage abundance? What's the difference between realtive and average atomic mass? Is there a difference?
*August 19, 2013*

**Math **

Does the equation y=x^2-x have y-axis, x-axis, or origin symmetry?
*August 11, 2013*

**english**

not glittering generality
*August 9, 2013*

**Business Math**

Universal Exporting has three warehouse employees: John Abner earns $422 per week, Anne Clark earns $510 per week, and Todd Corbin earns $695 per week. The company’s SUTA tax rate is 5.4%, and the FUTA rate is 6.2% minus the SUTA. As usual, these taxes are paid on the ...
*June 7, 2013*

**geometry**

The figures are similar. The ratio of the lengths of their corresponding sides is 45:25, or 9:5. Find the ratio of their perimeters and the ratio of their areas. The figures are not drawn to scale.
*June 6, 2013*

**social studies**

how does a society answer the three economic questions about the production and consumption of goods and services?
*May 27, 2013*

**social studies**

Ben's family purchased a dishwasher so that the family members could save time for more productive activities. what kind of production factor is this?
*May 27, 2013*

**Math**

3/4 - F = 1/3. What does F equal? ): Please help!
*May 22, 2013*

**College alegbra**

The population P of a city has been increasing at an annual rate of 1.4%. It's population was 173 thousand in 1992. A. Find a formula for P(t), where t is the year and P is in thousands. B. Estimate the population in 2010, to the nearest thousand. C. In what year did the ...
*May 12, 2013*

**College algebra**

The radioactive element has a half-life of about 28 years and sometimes contaminates the soil. After 47 years, what percentage of a sample of the elements remain?
*May 12, 2013*

**College algebra**

Use the properties of logs to write the expression as one log: 8log(base 5)4th square root of x minus 4log(base 5) x
*May 12, 2013*

**math**

You cut square corners from a piece of cardboard that has dimensions 32 cm by 40 cm. You then fold the cardboard to create a box with no lid. To the nearest centimeter, what are the dimensions of the box that will have the greatest volume?
*May 8, 2013*

**Math**

p+b less than or equal to 20 and 15*p+10*b is greater than or equal to 90
*May 6, 2013*

**Math**

Let me know if that helped you please (:
*May 6, 2013*

**Math**

Let our two variables be: p # of pharmacy hours b # of babysitting hours Then we should have two statements from the given facts: and We can graph these inequalities by solving for either p or b in both inequality. Once the inequalities are graphed then any point that is ...
*May 6, 2013*

**Bridge Math**

The inequality 10x + 20y > 500 models all of the combinations of scores of 10 and 20 points that will give a total greater than 500 points in a game. What is not true about the values for x and y?
*May 6, 2013*

**chemistry**

How would you figure: How much energy, in kJ, is absorbed by 23.8 g of acetone when it evaporates if its molar heat of vaporization is 32.0 kJ/mol? Acetone formula is C3H6O
*April 23, 2013*

**physics**

Someone on a glass-bottom boat shines a light through the glass into the water below. A scuba diver beneath that boat sees the light at an angle of 17 degrees with resoect to the normal. If the glass's index of refraction is 1.5 and the water's index of refraction 1.33...
*April 22, 2013*

**math**

a post is driven into the ground. the first strike drives the post 30 inches into the ground. the next strike drives the post 27 inches into the ground. assume these distances form a geometric sequence, what is the total distance the post is driven into the ground after 8 ...
*April 22, 2013*

**trig**

Two tracking stations are on the equator 135 miles apart. A weather balloon is located on a bearing of N 37 degrees E from the weastern station and on a bearing of N 19 degrees E from the eastern station. How far is the balloon from the weastern station?
*April 21, 2013*

**MATH**

1 D = 10^-18 statC·cm = 10^-10 esu·Å = 1⁄299,792,458×10^−21 C·m ≈ 3.33564×10^−30 C·m ≈ 1.10048498×1023 ≈ 0.393430307 au A dipole of 1 Debye is equal to 3.33 x 10-30 C m . Show that in ...
*April 14, 2013*

**Conversion Math**

A dipole of 1 Debye is equal to 3.33 x 10^-30 C m . Show that in atomic units 1 D = 0.39345 au.
*April 14, 2013*

**chemistry**

How many moles of sodium hydroxide are needed to react with 148.0 g of Iron (III) bromide?
*April 12, 2013*

**science**

describe the path of light rays from a leaf to the retina
*April 9, 2013*

**science**

explain the priniciples of light thaat enable the convex lens to function as it does
*April 9, 2013*

**algebra**

A rectangular picture is 2 inches longer than it is wide. When a frame 3 inches wide is placed around the picture, the area covered by the picture and frame is 168 square inches greater than the area covered by the picture alone. What are the dimensions of the picture?
*April 6, 2013*

**Algaebra**

A rectangular swimming pool is 5 feet longer than it is wide. If a concrete walk 2 feet wide is placed around the pool, the area covered by the pool and the walk is 156 square feet greater than the area covered by the pool alone. What are the dimensions of the pool
*April 5, 2013*

**Estimation and Computation**

The ratio of boys to girls in a class is 2:3. If a student is chosen at random to be on the student council, what is the probability it will be a girl?
*March 28, 2013*

**Consumer Math**

On your last credit card statement, you had a previous balance of $567.18, payments of $120, a periodic rate of 1.56 percent, and new charges totaling $45.17. What is your new balance?
*March 26, 2013*

**social studies **

why must people be careful with non rewable resources
*March 13, 2013*

**Physics**

A 40 lb football player runs at 12 mph into a 60 lb player(initially at rest). How fast do the two move after the collision?
*March 13, 2013*

**Physics**

A 100 kg car traveling at 40 m/s bounces off a stationary 300 kg car-recoiling at 20 m/s after the collision. What is the change in momentum during the collision (in kgm/s)?
*March 13, 2013*

**Math **

Which two sqare roots are used to estimate 47 ? (1 point)
*March 13, 2013*

**Stat Help Please**

Yearly stock returns on India's Sensex Index are well described by a Normal model with a mean of 18.36% and a standard deviation of 14.65%. give the stock return cutoff for the middle 30% of all years. I used TI-83 Calc. for these. Can someone check them? Thank you! Q1=...
*March 10, 2013*

**Math Help Please!!!!!**

The number of pounds gained during pregnancy are normal with mean=30.23 and st. deviation=13.84 Determine the percent of women that gain between 20 and 30 pounds.
*March 10, 2013*

**Sociology**

What aspects of the environment and society do sociologists study? (How is studying the environment part of the sociological perspective?)
*March 6, 2013*

**physics**

what is the minimum riding speed needed to be able to hear the whistle? Remember, you can assume the following things: The whistle you use to call your hunting dog has a frequency of 21.0 kHz, but your dog is ignoring it. You suspect the whistle may not be working, but you can...
*March 4, 2013*

**Geometry**

In the diagram, is an altitude drawn in trapezoid DEFG, DE = 10, EF = 9, FG = 8, and GD = 15. What is mÐD to the nearest degree? 37 53 60 80
*February 27, 2013*

**Math Help Please!!!!**

Determine which sampling method was used in each scenario. on a particular day 5 flights are selected at random and all of the passengers on these 5 flights are screened. Airport security uses a random number generator to determine the next passenger to screen.
*February 24, 2013*

**Math Helppp**

The College Board, which are administered each year to many thousands of high school students, are scored so as to yield a mean of 550 and a standard deviation of 100. these scores are close to being normally distributed. what percentage of the scores can be expected to ...
*February 24, 2013*

**Math Help Please!!!!**

The breaking strengths (say, y) for one foot square samples of a particular synthetic fabric are approximately normally distributed with a mean of 2280 pounds per square inch and a standard deviation of 10.6 psi. a) find the probability of selecting a 1 foot square sample of ...
*February 23, 2013*

**math**

A: 3.648 reapating 8= is rational B:-3 2/13= is rational C: 3.605551275464...=is irrational D: -3.744= is irrational
*February 15, 2013*

**math**

A: 3.648 reapating 8= is rational B:-3 2/13= is rational C: 3.605551275464...=is irrational D: -3.744= is irrational
*February 15, 2013*

**math**

which statement is false: A: 3.648 reapating 8= is rational B:-3 2/13= is rational C: 3.605551275464...=is irrational D: -3.744= is irrational
*February 15, 2013*

**math**

which statement is false? A: 3.648 reapeating=is rational B:-3 2/13=rational
*February 15, 2013*

**math**

solve the system by the elimination method: 3x-2y=2 2x+4y=-5
*February 14, 2013*

**math**

solve the system by the elimination method: 3x-2y=2 2x+4y=-5
*February 14, 2013*

**math**

Ms Sue the answers are a: 60 b: 75 c:80 D70
*February 14, 2013*

**math**

find the perimeter of the actual object using the scale factor shown on hte blueprint. each side is 3 centimeters long. 1cm=5m
*February 14, 2013*

**math**

one last question: find the perimeter of the actual object using the scale factor shown on hte blueprint. each side is 3 centimeters long. 1cm=5m
*February 14, 2013*

**math**

in a mathematics class half of the students scored 91 on an achievement test. with the exception of a few students who scored 47, the remaining students scored 7. which of the following statements is true about the distribution of scores? A: the mean is greater than the median...
*February 14, 2013*

**math**

solve the system by the elimination method: 4x=5y+24 5x=4y+21
*February 14, 2013*

**math**

write a trinomial of degree 4 such that the GCF of its terms is 1
*February 13, 2013*

**math**

write a trinomial of degree 4 such that the GCF of its terms is 1
*February 13, 2013*

**math**

write a trinomial of degree 4 such that GCFof its terms is 1
*February 13, 2013*

**math**

in a mathematics class, half of the students scored 91 on an achievement test. with the exception of a few students who scored 47, the remaining students scored 71. which of the following statements is true about the distribution of the scores? a: the mean is greater than the ...
*February 8, 2013*

**math**

in a mathematics class, half of the students scored 91 on an achievement test. with the exception of a few students who scored 47, the remaining students scored 71. which of the following statements is true about the distribution of the scores? a: the mean is greater than the ...
*February 8, 2013*

**Grammer**

thruout history, traveling traders and merchants took home new product such as tea, spices and fabrics as a matter of fact thats one reason civilizations changed.
*February 7, 2013*

**Math HELLPPPPP**

Invent a dataset with five values, with a mean smaller than the median and both the mean and median smaller than the standard deviation. give the data values and the statistics. Mean= Median= Standard Deviation=
*February 7, 2013*

**Statistics Helppppp**

Invent a dataset with five values, with a mean smaller than the median and both the mean and median smaller than the standard deviation. give the data values and the statistics. Mean= Median= Standard Deviation=
*February 7, 2013*

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