Saturday

February 28, 2015

February 28, 2015

Total # Posts: 1,691

**Probability**

Five cards are drawn from an ordinary deck without replacement. Find the probability of getting a. All red cards b. All diamonds c. All aces
*April 29, 2011*

**Chemistry**

Three solutions are mixed together to form a single solution. One contains 0.2 mol Pb(CH3COO)2, the second contains 0.1 mol Na2S, and the third contains 0.1 mol CaCl2. Write the net ionic equations for the precipitation reaction or reactions that occur.
*April 29, 2011*

**Statistics**

Cholesterol levels of adult males are approximately normally distributed with a mean of mg/dL and a listed variance of . Some researchers claim that the variance of cholesterol levels of adult males is less than . Suppose that we want to carry out a hypothesis test to see if ...
*April 29, 2011*

**Pre-Calculus**

How do I solve, in radians and degrees, 2-3sin(3(x-pi))=6?
*April 27, 2011*

**Physics **

user-generated content: report abuse What approximate change in decibels does an observer experience from a sound source if the observer moves to a new location that is 67% as far from the source? My answer choices are 23, -23, 40, 2.76, -2.76, 1.94, -1.94, 2.57, -2.57, and 0 ...
*April 26, 2011*

**Chem Webwork UCI**

Complete the table below: What is the pH of the solution created by combining 0.70 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)? mL NaOH: 0.70 pH w/ HCl: 1.08 pH wHC2H3O2: 3.23 Complete the table below: What are the pH ...
*April 25, 2011*

**Chem Webwork**

nevermind, i got the answer
*April 25, 2011*

**Chem Webwork**

Complete the table below: What are the pH values if you take into account that the 8.00 mL of 0.10 M Acid was first diluted with 100 mL of water (like it will be in the experiment you perform in lab)? mL NaOH: 0.70 pH w/ HCl: 2.14 pH w/ HC2H3O2: ??? I got pH w/ HCl, but I can...
*April 25, 2011*

**political science**

Which President developed the Policy of preemption with regard to foreign policy?
*April 24, 2011*

**Math(can you just check my answer please)**

¡çLMN and ¡çNMO are adjacent angles that share MN ƒåƒåƒåƒåƒâ as a side. Together, those two angles form ¡çLMO. What equation can you write that shows the relationship between m¡...
*April 20, 2011*

**science**

What is another word for exothermic?
*April 16, 2011*

**math**

a triangle with a side of length 2/7 units and side of length 15/28 units
*April 14, 2011*

**Trigonometry**

Proof the identity 1 + sin 2x/cos 2x = cos x + sin x/ cos x - sin x
*April 7, 2011*

**Trigonometry**

If 13 sin x + 5= 0 and x є (0º; 270º) calculate the sum of 2x
*April 7, 2011*

**Trigonometry**

cos(54º-X)=sin2X
*April 7, 2011*

**Math**

If you pay 3.5 % interest over 4 years and the interest earned is $498.40 what is the principal
*April 6, 2011*

**trig**

If an equilateral triangle has a side of 10 ft what is its altitude to two significant digits
*April 6, 2011*

**Cal II**

Intergral (27-9x^2)^(1/2) fit to theorem (a^2-u^2)^(1/2)
*April 4, 2011*

**elapsed time**

elapsed time is 2hr 37min, end time is 10:52P.M., what is the start time?
*April 4, 2011*

**elapsed time**

start 11:38a.m. elapsed time 3hr 10 min what is the end time?
*April 4, 2011*

**Math**

Using only whole numbers, how can you draw three rectangles with a perimeter of 12 units?
*March 29, 2011*

**7th Grade Math**

The area shaded is the matting and it is 64 square inches. What side length of a picture frame do you need to cover the entire picture? There is a 6inch square opening in the matting.
*March 29, 2011*

**Chemistry**

I need help on this, I don't know the answers
*March 26, 2011*

**teaching**

hello. i need help starting a pre-iep outline. i have never seen one before. thank you.
*March 25, 2011*

**Science**

Do neurons send electrical messages to the brain to tell the body what to do?
*March 23, 2011*

**social studies**

what facts are there on point of view on tariffs on imported goods
*March 20, 2011*

**English-**

What is the theme of the book NUmber 8 by Anna Fienberg?
*March 20, 2011*

**English- Figurative Language**

What type of figurative language is the following sentence? : Oh, never, if I live to a million, Shall I feel such a terrible pain.
*March 20, 2011*

**Math**

a. X is the number of tables and y is the number of chairs: 90x+40y< or = $1000 b. i have no idea c. 3
*March 20, 2011*

**Chemistry**

2g NaHCO3 + .6 mL HCL --> NaCl+CO2+H2O How much carbon dioxide do I get? How do I find out? I got 410 mL of CO2, is this correct?
*March 19, 2011*

**Chemistry**

2g NaHCO3 + .6 mL HCL --> NaCl+CO2+H2O How much carbon dioxide do I get? How do I find out?
*March 19, 2011*

**math**

3/4 = $0.75 1/10=$0.10
*March 17, 2011*

**chemistry**

The combustion of propane (C3H8)produces CO2 and H20: C3H8(g)+5O2(g) 3CO2(g)+4H2O(g) Calculate the mass, in grams, of H2O that will be produced if 2.5 mol of O2 is consumed.
*March 16, 2011*

**chemistry**

The combustion of propane (C3H8)produces CO2 and H20: C3H8(g)+5O2(g) 3CO2(g)+4H2O(g) Calculate the mass, in grams, of H2O that will be produced if 2.5 mol of O2 is consumed.
*March 16, 2011*

**PHYSICS**

I used the formula, but I still don't know how to solve the problem ? Did you get it ?
*March 15, 2011*

**Chemistry II**

How much energy would be required to heat 60 grams of water from -50 degrees C to 200 degrees C?
*March 14, 2011*

**Chemistry II**

100 grams of KNO3 is dissolved in one liter of water. Calculate the freezing point depression and boiling point elevation.
*March 14, 2011*

**english**

C- unlike oak roots, maple roots often invade water lines.
*March 12, 2011*

**double integral**

1. Sketch the region of integration & reverse the order of integration. Double integral y dydz... 1st (top=1, bottom =0)... 2nd(inner) integral (top=cos(piex), bottom=(x-2)... 2. Evaluate the integral by reversing the order of integration. double integral sqrt(2+x^3) dxdy... ...
*March 11, 2011*

**accounting**

Lone Star Theatre Inc. owns and operates movie theaters throughout Arizona and Texas. Lone Star Theatre has declared the following annual dividends over a six-year period: 2005, $7,500; 2006, $9,000; 2007, $30,000; 2008, $30,000; 2009, $40,000; and 2010, $48,500. During the ...
*March 9, 2011*

**Chemistry**

How many moles of ethanol is contained in 250.0 ml of a 1.90M ethanol solution? A. none of these B. 7.60 C. 475 D. 0.475
*March 5, 2011*

**chemistry**

how do I prepare 50% and 70% ethanol from 95% ethanol?
*March 4, 2011*

**Psychology**

s2 pooled= 19/48 (10) + 29/48 (25)
*March 4, 2011*

**calculus**

find equation of the tangent line to the graph of f(x) at the given point f(x)=(x-1)(2x+3)/(x-5) at 9, 42
*March 2, 2011*

**Chemistry- please help**

How do I go about preparing 50% ethanol and 70% ethanol from 95% ethanol?
*February 27, 2011*

**chemisrty**

calculate the percent by mass of carbon(c) in the amino acid arginine,C6H16N4.
*February 27, 2011*

**Chemstry **

Lovastatin (C24H36O5) has a molar mass of 404.53 g/m. The normal dose of the drug lovastain is 20mg. How many molecules of lovastatin (C24H36O5) are in a normal dose?
*February 24, 2011*

**Psychology**

inherited universal ideas, wishes, and memories.
*February 23, 2011*

**ON LINE LIBRARY SOURCES**

HOW CAN THE ONLINE LIBRARY HELP ME WITH FINDING MY ACEDEMIC WRITING?
*February 18, 2011*

**algebra**

-4/3x+3=
*February 15, 2011*

**physics**

What is the maximum power consumption of a 8.7 V portable CD player that draws a maximum of 354 mA of current?
*February 15, 2011*

**physics**

What is the resistance of a 2.5 m length of copper wire 1.3 mm in diameter?
*February 15, 2011*

**Language Arts**

Hello! I have to write a summary of a book that I've read, and I've been writing it, and I'm worried I'm putting in too much detail/making it too specific/too long? I wasn't sure if I'm supposed to summarize the whole plot in a couple of paragraphs, or ...
*February 14, 2011*

**Math**

List the x-intercepts for the function f(x)=ln |x-1|
*February 13, 2011*

**Math**

List the x-intercepts for the function f(x)=ln |x-1|
*February 13, 2011*

**Math**

List the x-intercepts for the function f(x)=ln |x-1|
*February 13, 2011*

**Chemistry**

A fish tank holds 40 gallons of water (density 1.00g/mL) when full. What is the mass of the water in kilograms (kg)?
*February 7, 2011*

**Math**

ok thanks!
*February 2, 2011*

**Math**

Ineed to come up with an EXCEL formula for the following; Ineed to determine the total number of games. I know the % (games) of lost and I know the number of (game) wins. I need to determine the total number of games. I can figure the % of wins by subtracting the % lost from ...
*February 2, 2011*

**Algebra 2**

what happens when the major and minor axies are exactly the same length?
*January 31, 2011*

**math(HELP)**

what is the answer to 1x2x3x4x5x6x7x8x9x10x11x12x13x14x15x16x17x18x19x20 please
*January 28, 2011*

**Math-Algebra II**

How would you interpret the findings of a correlation study that reported a linear correlation coefficient of − 1.34? The only thing I know is that it represents a negative correlation. Please shed any light you can.
*January 26, 2011*

**Chemistry**

Determine the volume of concentrated HCL and the volume of water needed to produce 20mL of 6M HCL.
*January 26, 2011*

**US History**

Hello! I have to do a project about a colony that became a state, and I decided to do Connecticut. There's some things I need to find out, like who were the first settlers, what special problems did they face, and who were the early leaders? Can someone point me out a ...
*January 25, 2011*

**Calculus**

What is the slope-intercept equation of the line tangent to the graph of y=8ln(x) when x=5.
*January 23, 2011*

**science**

What is an hypothesis for this question; Do males and females play the same types of games?
*January 22, 2011*

**Economics**

Suppose the demand curve for a monopolist is Qd = 500 – P, and the marginal revenue function is MR = 500 -2Q. The monopolist has a constant marginal and average total cost of $50 per unit. A. Find the monopolist’s profit- maximizing output and price. B. Calculate the...
*January 17, 2011*

**Economics**

Suppose the demand curve for a monopolist is Qd = 500 – P, and the marginal revenue function is MR = 500 -2Q. The monopolist has a constant marginal and average total cost of $50 per unit.
*January 17, 2011*

**algebraII**

solve for x: 1)log(x-3)+log(x+4)-logx=log5
*January 17, 2011*

**Math**

4. Vanna has just financed the purchase of a home for $200 000. She agreed to repay the loan by making equal monthly blended payments of $3000 each at 9%/a, compounded monthly. c. How long will it take to repay the loan? d. How much will be the final payment? e. Determine how ...
*January 17, 2011*

**MATHHH**

Mike wants to buy a snowmobile. His parents decide to lend him $9 000 at 10%/a, compounded monthly, if he agrees to repay the amount by making equal monthly (at the end of the month) payments for five years. d. Write the series that represents the present value of the annuity...
*January 17, 2011*

**math**

a circular pond has a diameter of 1.8m and a depth of 55cm. if we fill the pond with water, what is its volume
*January 15, 2011*

**math**

-4(x^-8)=84
*January 13, 2011*

**physics**

Identical +1.45 µC charges are fixed to adjacent corners of a square. What charge (magnitude and algebraic sign) should be fixed to one of the empty corners, so that the total electric potential at the remaining empty corner is 0 V?
*January 13, 2011*

**earth science**

three reason and explanations why oil and natural gas is called fossil fuels?
*January 12, 2011*

**earth science**

what's a good topic sentence and conclusion for why do they call oil and natural gas fossil fuels?
*January 12, 2011*

**earth science**

thanks:)
*January 12, 2011*

**earth science**

why do they call oil and natural gas "fossil" fuels?
*January 12, 2011*

**earth science**

how did the extinction of dinasaurs allow for the evolution of more complex creatures, such as human beings?
*January 12, 2011*

**earth science**

how did the extinction of the dinasaurs allow for the evolution of more complex creatures, such as human beings?
*January 12, 2011*

**physics**

An electron accelerates from rest through a potential difference of 184 V. What is its final speed? An electron that has a horizontal initial speed of 4.50 106 m/s enters a region that has an electric field of 120 V/m pointing vertically upward. How long does the electron take...
*January 12, 2011*

**physics**

The work done by an electric force in moving a charge from point A to point B is 2.76 10-3 J. The electric potential difference between the two points is VA − VB = 47.5 V. What is the charge
*January 12, 2011*

**physics**

Point A is at a potential of +250 V, and point B is at a potential of -150 V. An á-particle is a helium nucleus that contains two protons and two neutrons; the neutrons are electrically neutral. An á-particle starts from rest at A and accelerates toward B. When ...
*January 12, 2011*

**Math**

in 1992, the life expectancy of males in a certain country was 69.8 years. in 1999, it was 72.4 years. Let E represent the life expectency in year t and let t represent the number of years since 1992. The linear function E(t) that fits the data is E(t) =_ t+_ Use the function ...
*January 11, 2011*

**Algebra**

What is the slope of the line given by 4x = 0 by 5y = 0? How do I solve this?
*January 10, 2011*

**physics**

The magnitude of each of the charges in the figure below is 8.75 10-12 C. The lengths of the sides of the rectangles are 2.94 cm and 4.80 cm. Find the magnitude of the electric field at the center of the rectangle in the figures below. both pictures are rectangles. I dont know...
*January 10, 2011*

**physics**

An electric field of 264,000 N/C points due west at a certain spot. What are the magnitude and direction of the force that acts on a charge of -6.75 µC at this spot? magnitude?
*January 8, 2011*

**physics**

((3.54 10-9 kg)(9.8))/ 8000 N/C and it gave me the wrong answer so im not sure what im doing wrong.
*January 8, 2011*

**physics**

A small drop of water is suspended motionless in air by a uniform electric field that is directed upward and has a magnitude of 8000 N/C. The mass of the water drop is 3.54 10-9 kg How many excess electrons or protons reside on the drop?
*January 8, 2011*

**physics**

Two charges are placed on the x axis. One of the charges (q1 = +9.4 µC) is at x1 = +3.1 cm and the other (q2 = -22 µC) is at x2 = +9.3 cm. Find the net electric field (magnitude and direction) at x = +6.5 cm. (Use the sign of your answer to indicate the direction ...
*January 8, 2011*

**physics**

im getting the 26-k(q*q2)/(.37)^2=24 so 24-26 gets -2.0. -k(q*q2)/(.27)2=-2.0. and then i solve for q2 but im not geting the right answer.
*January 6, 2011*

**physics**

Two point charges are fixed on the y axis: a negative point charge q1 = -22 µC at y1 = +0.24 m and a positive point charge q2 at y2 = +0.37 m. A third point charge q = +7.7 µC is fixed at the origin. The net electrostatic force exerted on the charge q by the other ...
*January 6, 2011*

**physics**

Two point charges are fixed on the y axis: a negative point charge q1 = -22 µC at y1 = +0.24 m and a positive point charge q2 at y2 = +0.37 m. A third point charge q = +7.7 µC is fixed at the origin. The net electrostatic force exerted on the charge q by the other ...
*January 6, 2011*

**Algebra**

How do I find the intercept of this equation? -4x = 2y-1
*January 3, 2011*

**law**

Over the past decade, some countries have shown high crime rates while other countries have lower crime rates. For example, the lowest homicide rates in 2000 existed in Saudi-Arabia and Japan, while France and Germany had the highest homicide rates. Their rates, however, were ...
*January 2, 2011*

**law**

What are some of the ways that organized crime impacts you and a community and/or city (of your choice) directly? (This element will account for 20% of your grade.) What are some of the ways that law enforcement agencies are working to reduce these types of organized crime in ...
*January 2, 2011*

**Finance**

You made a bank deposit in UK sterling that matures next December. The interest rate was 10% while home rates are only 4%. You thought you would be going to London at the end of the year, but now you cannot. The outlook for pounds is depreciation, but you will lose all of your...
*December 20, 2010*

**Geometry**

What best describes the relationship between line y=2+8 and line 4y=8x+16 A. Parallel B. Perpendicular C. Skew D. Equivalent E. Intersecting
*December 12, 2010*

**physics**

why is static friction bigger than kinetic friction
*December 9, 2010*

**algebra**

Trains A and B are traveling in the same direction on parallel tracks. Train A is traveling at 60 mph and train B at 63 mph. Train A passes a station at 11:10 AM. If train B passes the same station at 11:40 AM, at what time will train B catch up to train A? When will train B ...
*December 9, 2010*

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