Monday

September 1, 2014

September 1, 2014

Total # Posts: 2,540

**AP Physics**

A rock thrown straight up with a velocity of 30 m/s from the edge of a building just misses the building as it comes down. The rock is moving at 47 m/s when it strikes the ground. How tall was the building? The accelera- tion of gravity is 9.8 m/s2 . Answer in units of m.
*August 24, 2010*

**Confused-Math**

Your calculator gives an answer of x=1.1578074156, y=2E-13 when using ROOT or ZERO in the graphing mode. Give the coordinates of the x-intercept your calculator has given you to the nearest thousandth. <<< ? I have no idea how to solve these. Someone please explain ...
*August 22, 2010*

**math**

how do you find all real and non real solutions to these type of equations?: (x+3)^2 - 81=0 (x+1)(x-2)=18 THANKS!
*August 22, 2010*

**Math**

But how do you figure out T? Out of the multiple choice answer nothing is coming close to one of the answers these are the multiple choice answers A) $2116.98 B) $18.57 C) $1857 D) $1818.44
*August 19, 2010*

**Math**

Choose the one alternative that best completes the statement or answers the question. Solve the problem. Assume that simple interest is being calculated in each case. Round your answer to the nearest cent. Martin takes out a simple-interest loan at 7.5 %. After 6 months, the ...
*August 19, 2010*

**math**

5x2=10
*August 14, 2010*

**geometry**

the endpoints of a line segment graphed on a cartesian coordinate system a (-2,6) and (1,2). what are the aoordinates of the midpoint of the segment?
*August 12, 2010*

**Chemistry **

Calculate the cell potential for the electrochemical cell consisting of Ag metal in a 0.500 M AgNO3 solution and Fe metal in a 3.0 M Fe(NO3)3 solution.
*August 8, 2010*

**algebra**

The length of a rectangular field is 18 m longer than the width. The field is enclosed with fencing and divided into two parts with a fence parallel to the shorter sides. If 216 m of fencing are required, what are the dimensions of the outside rectangle?
*August 8, 2010*

**History **

What is the outcome/results of the Genocide Rwanda conflict & what are its consequences for the UN?
*August 4, 2010*

**Algebra**

If a square handkerchief has an area of w^2+4w+4feet, what is the length of one side?
*July 31, 2010*

**math**

-35
*July 29, 2010*

**math**

resipical x/7=-5 ?
*July 29, 2010*

**math**

-15
*July 29, 2010*

**math**

multiply by the resipical 1/5p=-3
*July 29, 2010*

**math**

1/4y=-12 , 1/5p=-3 , x/7=-5
*July 29, 2010*

**caring for scool-age childfren**

for your second Q the answer is C lives with her parents,her grandm.....
*July 24, 2010*

**caring for school -age children**

for your second Q;is D is emphasizes the role......
*July 24, 2010*

**calc**

find the average rate of change on the indicated intervals f(x) = x^3 - 2x ; [0,4]
*July 20, 2010*

**algebra**

can someone pls show me how to work this 1) x+y=0 7x-7y=0 2) 2x-5y=1 3x+y=-7 3) 1/3x-4=6 x-3y=0 can someone show me how to work these please asap today thanks
*July 12, 2010*

**social studies**

These organizations have done very little on reducing tribal poverty and encouraging prosperity. As noted in our text: Today’s Native Americans are the “most undernourished, most short-lived, least educated, least healthy.” The BIA was organized to be in charge ...
*July 8, 2010*

**ETH/ 125**

Do you still need help? I have this paper I wrote for the same class, you can look over it to get some good ideas. Let me know if you still need it.
*July 8, 2010*

**ENGLISH**

What is the proper noun and common noun in this sentence. On his journey back to America, Victor sailed on the Princess.
*July 7, 2010*

**physics**

how is Gauss's Law use in determining the electric field anywhere around a point charge and how is this related to Coulomb's law?
*July 6, 2010*

**Physics**

Hello, Here is what I came up with: A) The vector pointing down is the weight from the stone on the Earth. To make the net force zero, you need to have an equally opposite force exerting itself on the stone, say the ground pushing its own force against the stone, the two ...
*July 6, 2010*

**physics**

two equally charged plates with finite length l is positioned side by side (parallel) and separated by distance d. what is the electric field intensity between the plates?
*July 1, 2010*

**physics**

consider a solid metal ball with radius r and charge q. what is the electric field intensity at the center, anywhere inside the ball and anywhere outside the ball?
*July 1, 2010*

**chemistry**

The pH of a 0.10 M salt solution is found to be 8.10. Determine the Kb and the degree of ionization of the basic ion.
*June 27, 2010*

**Statistics**

Find z such that 20.3% of the standard normal curve lies to the right of z. 0.831 0.533 -0.533 -0.257 0.257
*June 24, 2010*

**Statistics**

As x increases, does the value of r imply that y should tend to increase, decrease, or remain the same? Explain. ( Since r is zero, as x increases, y decreases. Since r is negative, as x increases, y remains the same. Since r is negative, as x increases, y decreases. Since r ...
*June 24, 2010*

**Statistics**

. Suppose a certain species of fawns between 1 and 5 months old have a body weight that is approximately normally distributed with mean kilograms and standard deviation kilograms. Let x be the weight of a fawn in kilograms. Convert the following x interval to a z interval. ...
*June 20, 2010*

**Statistics**

Assuming that the heights of college women are normally distributed with mean 62 inches and standard deviation 3.5 inches, what percentage of women are between 58.5 inches and 72.5 inches? (Points: 5) 34.1% 84.0% 15.7% 13.6% 97.6%
*June 20, 2010*

**Statistics**

The heights of 18-year-old men are approximately normally distributed with mean 68 inches and standard deviation 3 inches. What is the probability that the average height of a sample of ten 18-year-old men will be less than 70 inches? Round your answer to four decimal places. ...
*June 20, 2010*

**Statistics**

yes statistics it is
*June 20, 2010*

**Jared**

Suppose that x has a distribution with = 10 and = 5. If a random sample is taken of size n = 44, find . 10.00 0.75 1.51 0.11 my answer was 0.75 is this 5.00 correct
*June 20, 2010*

**Statistics**

A person's level of blood glucose and diabetes are closely related. Let x be a random variable measured in milligrams of glucose per deciliter (1/10 of a liter) of blood. Suppose that after a 12-hour fast, the random variable x will have a distribution that is ...
*June 20, 2010*

**Statistics**

my answer to this is 1.519 from 0.44
*June 20, 2010*

**Statistics**

Find z such that 44.0% of the standard normal curve lies to the left of z. 0.151 -0.772 -0.151 -1.519 1.519
*June 20, 2010*

**Statistics**

my answer is 0.633 is this correct , it not exact but closer
*June 20, 2010*

**Statistics**

my answer is equals 15.7 is this correct
*June 20, 2010*

**computers**

I've figured out that the missing one the "copyright disigns and pantent act" anyway
*June 19, 2010*

**computers**

Hello everyone I have this homework about protection programs can you tell me wat these r. plz The Data protection act The Computer missuse act and one more which iv'e forgotten Can you tell me what that missing one is or wat those acts are all about. Thanks
*June 19, 2010*

**Geography**

A type of Wave P.S It's _ _ _ _ _ _ _ and it's not tsunami
*June 19, 2010*

**Geography**

A circulating current of warmer material(such as magma) P.S It is 2 words and they are _ _ _ _ _ _ _ _ _ _ / _ _ _ _ _ _ _
*June 19, 2010*

**Geography**

What do the crust and upper mantle form?
*June 19, 2010*

**chemistry**

1.40 m high
*June 18, 2010*

**chemistry**

what pressure (in atm) is exerted by a column of mercury 1.4O high? The density of mercury is 13.5951 g/cm3.
*June 18, 2010*

**algebra**

at what value of x does the perpendicular bisector of the line segment with endpoints (-2,6) and (5,-4) cross the x-axis?
*June 17, 2010*

**Chemistry**

John forgot to add the few drops of water resulting in the presence of some Mg3N2 in the final solid product. Will her reported magnesium to oxygen mole ratio be reported too high or too low? Explain. Hint: The Mg: N mass ratio is 1:0.38, and the Mg:O mass ratio is 1:0.66.
*June 13, 2010*

**Chemistry**

In a hurry to complete the experiment, Josh did not allow all the magnesium to react. Will his reported magnesium to oxygen ration be reported too high or too low? Explain
*June 13, 2010*

**Chemistry**

The burning of the magnesium becomes uncontrolled (it burn brightly. Oops! How will this procedural error affect the reported mole ratio of magnesium to oxygen in the analysis? Explain.
*June 13, 2010*

**Biology**

In the course of performing and interpreting daily !@#$%^&l lavages in a rat, a rat that had previously been exhibiting regular 4 day cycles starts a prolonged period of acyclicity which is dominated by cornified epithelial cells. A male rat also co-habits her cage, but is ...
*June 13, 2010*

**geometry**

how do you do list the following elements in proper set notation. Place the elements in numerical order within the set. *0*123*4*34* 1
*June 3, 2010*

**eth/125**

I have also downloaded the RiverPoint Writer and it is a very useful tool, it will help you format papers in APA standards.
*June 3, 2010*

**eth/125**

These organizations have done very little on reducing tribal poverty and encouraging prosperity. As noted in our text: Today’s Native Americans are the “most undernourished, most short-lived, least educated, least healthy.” The BIA was organized to be in charge ...
*May 27, 2010*

**math**

what is a polynomial with a single root at x=-5 and a triple root at x=3
*May 25, 2010*

**Chem**

Is sodium benzoate soluble in HCl? I put yes What about NaOH? It's supposed to be created from a reaction with benzoic acid and NaOH What about NaHCO3? And aq. sodium benzoate plus HCl? And aq. sodium benzoate plus NaOH?
*May 25, 2010*

**Chemistry**

Is Glucose soluble in HCl, NaOH and NaHCO3 because it's soluble in water? - I put soluble for all because it dissolves in water. Is p-toluidine soluble in HCl, NaOH, and NaHCO3? I put soluble in HCl, insoluble in NaOH and insoluble in NaHCO3. Is benzoic acid soluble in HCl...
*May 25, 2010*

**math**

nick had 1 3/4 gallon of milk. how many pints of milk does nick have?
*May 24, 2010*

**ethnicity**

These organizations have done very little on reducing tribal poverty and encouraging prosperity. As noted in our text: Today’s Native Americans are the “most undernourished, most short-lived, least educated, least healthy.” The BIA was organized to be in charge ...
*May 24, 2010*

**calculus**

Now we prove Machin's formula using the tangent addition formula: tan(A+B)= tanA+tanB/1-tanAtanB. If A= arctan(120/119) and B= -arctan(1/239), how do you show that arctan(120/119)-arctan(1/239)=arctan1?
*May 23, 2010*

**Bio Please Help**

it's for a biology lab ...in physiology. I really don't even understand the question.
*May 23, 2010*

**Bio Please Help**

For high quality representation of an analog waveform that varies between 10Hz and 100Hz, a digital data acquisition system will have to record data at what minimum frequency? a. 1000 sps b. 5000 sps c. 200 sps d. 100Hz e. 50Hz
*May 23, 2010*

**Chemistry**

Describe the process by which adding potassium hydroxide to a saturated aluminum hydroxide solution reduces the concentration of aluminum ions. Write the solubility equilibrium equation and solubility product constant expression for a saturated aqueous solution of aluminum ...
*May 18, 2010*

**Civics**

How does someone become a supreme court justice?
*May 18, 2010*

**Civics**

what three rulings can result from a case in a federal appeals court?
*May 18, 2010*

**Civics**

How do federal district courts and federal appeals court differ?
*May 18, 2010*

**Civics**

describe how the current federal court system originated
*May 18, 2010*

**Physiology**

If the R waves of leads I and II are both 4mV, what is the value of lead III? a. 8mV b. 1mV c. -4mV d. 0mV e. -8mV
*May 17, 2010*

**Physiology**

If the R waves of leads I and II are both 4mV, what is the value of lead III? a. 8mV b. 1mV c. -4mV d. 0mV e. -8mV
*May 17, 2010*

**writing**

So, you need to write a paper,or an "essay." You probably need to write five paragraphs, unless your rubric tells you otherwise.Pick an interesting topic, even if you don't know a lot about it because you can always search it on the computer. It can be really fun...
*May 16, 2010*

**science**

How can computers predict the outcome of an election soon after the polls but before all the votes have been counted?
*May 12, 2010*

**math **

thank you for your help!!
*May 12, 2010*

**math **

No, when dealing with fractions, how do you fracture?
*May 12, 2010*

**math **

what is a fracture?
*May 12, 2010*

**chemistry**

that proportion solving for X doesnt give me a number listed as an option..I got 470
*May 12, 2010*

**chemistry**

if the ration of water drops to EDTA is 6.7 for the known sample and 10 for the unknown sample what is the concentration of the unknown sample? (The concentration of the known sample is 315 ppm) a. 150mg/L b. 210mg/L c. 280mg?L d. 320mg/L
*May 12, 2010*

**chemistry**

so would the answer be a. 10??
*May 12, 2010*

**chemistry**

what is the ratio of water drops to EDTA if 2 drops of EDTA was needed to change the color of 20 drops of water with unknown hardness? a. 10 b. 5 c. 0.1 d. 1.0 please explain..
*May 12, 2010*

**chemistry**

Bob pursle answered a very similar question this one has 2 drops and unknown hardness...
*May 12, 2010*

**chemistry**

what is the ratio of water drops to EDTA if 2 drops of EDTA was needed to change the color of 20 drops of water with unknown hardness? a. 10 b. 5 c. 0.1 d. 1.0
*May 12, 2010*

**chemistry**

what about this?? what is the ratio of water drops to EDTA if 2 DROPS of EDTA was needed to change the color of 20 drops of water with UNKNOWN HARDNESS? a. 10 b. 5 c. 0.1 d. 1.0
*May 12, 2010*

**chemistry**

what is the ration of water drops to EDTA (ethylenediamene tetraacetic acid) if 3 drops of EDTA was needed to change the color of 20 drops of water with known hardness?? a. 0.15 b. 1.0 c. 4.0 d. 6.7 am I missing something huge here??
*May 12, 2010*

**Pre-Algebra**

I need work the answer is 5 but i keep getting 4.5 if anyone can help me on the rest i got a page of work! 2y=20-4x*0
*May 11, 2010*

**chemistry**

which color of the visible region of the electromagnetic spectrum has the highest energy? a. red b. blue c. green d. violett
*May 11, 2010*

**chemistry**

which one of the following is a direct result of "hard water"? a. formation of a bathtub ring b. discoloration of clothers c. water spots on dishes d. maeks your skin feel slipper to the touch. I think its A but just wanted to double check.
*May 11, 2010*

**chemistry**

in any experiment does water in a beaker absorb or release energy in the form of heat?
*May 11, 2010*

**chemistry**

the answer I got is 1027 J/g.. right??
*May 10, 2010*

**nutritian**

which of the following food items should have the highest energy content? a. nuts b. popcorn c. marshmallow d. apple
*May 9, 2010*

**Chem 1LC**

Could someone please help me with this problem!!?!? Thanks you so much!!! The reduction potentials for the species involved in an electrochemical cell are as follows: M+ + e– M is 0.50 V J+ + e– J is 1.20 V. All solutions are 1.00 M and J+ J is connected to M+ M. A) ...
*May 3, 2010*

**math **

Can someone please help me I can't figure this out Find the center and radius of the circle. (x - 4)2 + (y + 6)2 = 16
*May 2, 2010*

**Algebra 2**

a) A population of 460 animals that increases at an annual rate of 15%. Write an exponential function to model. b) Write an exponential function to model. Predict the value of the function after 5 years(nearest whole number). A population of 430 animals that decreases at ...
*May 2, 2010*

**6th grade math**

240
*April 28, 2010*

**Chemistry**

A pressurised can of whipped cream has an internal pressure of 1.33x105 Pa at 25.0 oC. If it is placed in a freezer at -15.0 oC, what is the new value for its internal pressure (in Pa)?
*April 28, 2010*

**Algebra II**

suppose you are biking down a hill at 24 mi/h. What is the angular speed, in radians per second, of your 27-inich-diameter bicycle wheel?
*April 25, 2010*

**science gr.5**

what 3 things would i miss the most if there were no pulleys and gears in the world?
*April 25, 2010*

**math **

The graph shows the y axis has a positive 5 on the top and a negative one the bottom. The X axis show the same the same thing
*April 23, 2010*

**math **

State the solutions, or estimated solutions, to each quadratic equation in Exercises 23–26 by examining the graph of the related quadratic function equation 2x2 - 3x - 4 = 0 and Graph:y=2x^2-3x-4 Can someone help me with this
*April 23, 2010*

**math**

Thank you so much
*April 20, 2010*

**math**

For which table(s) of values in Exercises 39–42 is the relationship linear? Tell how you decided. Write the equation for each linear relationship. x 5 10 15 20 25 30 y 20 30 40 50 50 50 I understand this is not linear function but what is it asking me to do next.
*April 20, 2010*

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