# Posts by michelle

Total # Posts: 1,965

**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*

**MATH**

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 don't...

*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*

**Math**

Translate: The product of 16% and some number?

*December 9, 2010*

**Algebra**

The equation y=-1777x+27,153 can used to predict the number of y gun deaths in the United States x years after 2000 that is x=0 corresponds to 2000, x=3 corresponds to 2003, x=6 corresponds to 2006, and so on. Predict the number of gun deaths in 2006 and 2009. In what year ...

*December 9, 2010*

**algebra**

The function H described by H(x)=2.75x+71.48 can be used to predict the height in centimeters of a woman whose humerus is x centimeters long what is the height of a woman whose humerus is 35 centimeters long?

*December 9, 2010*

**5th grade**

if a line is measured as 1 and 4/8 inches long explain how you could simplify the measurement

*December 8, 2010*

**5th grade**

What is the mode of these # 19,20,32,26

*December 8, 2010*

**math**

What is the mode of these numbers-19,20,32,26.Show me how you got your answer.

*December 8, 2010*

**math**

i squared square root -80

*December 6, 2010*

**adv. alg.**

-i squared square root of -80

*December 6, 2010*

**Calculus**

Find the point on the graph of y=2x-4 that is closest to the point (1,3). (Optimization equation)

*December 6, 2010*

**algebra**

I'm doing functions, and I don't know how I'm solving this equation wrong? the equation is y = (x-2)^2 - 1 when I graph it, the shape is supposed to be a parabola. I'm using -2,-1,0,1, and 2 as my X values. But I'm getting 15, 8, 3, 0, and -1 for my Y ...

*December 6, 2010*

**geometry**

the area of a triangle is 147 square inches and its height is 1.5 times its base. find the base and the height of the trianle.

*December 5, 2010*

**physik**

was kÃ¶nnte passieren,wenn man aluminiumstÃ¤be in eine betonmauer einarbeiten wÃ¼rde?

*December 5, 2010*

**math-PLEASE HELP**

Convert to decimal notation. 8.23 * 10^7

*December 5, 2010*

**Engligh 101**

I need help analzying this quote. The fantastic. . . lasts only as long as a certain hesitation. . . [in deciding] whether or not what they [the reader and the protagonist] perceive derives from “reality” as it exists in the common opinion. . . If he [the reader] ...

*December 4, 2010*

**algebra**

I'm doing functions, and I need to write an equation that represents the relationship between X and Y. (1,4),(2,7),(3,10),(4,13) I see what it is, but i don't know how to write it in an equation? it's like adding in the next odd number?

*December 3, 2010*

**Math**

There are 2 opaque bags, each containing red and yellow blocks. Bag 1 contains 3 red blocks and 5 yellow. Bag 2 contains 5 red and 15 yellow. To play the game, you pick a bag and then you pick a block out of the bag without looking. Would a person be more likely to pick a red ...

*December 2, 2010*

**algebra**

I just started learning functions and how to graph them.. but I don't know how to do this problem? x + y = 0. I wasn't sure so I put "No Solution"

*December 2, 2010*

**math**

A whole circle is divided into thirds. Each third is what percent of the whole circle? (No remainder change to fraction)

*December 1, 2010*

**math**

Sir pizza donated 14 pizzas to the sixth grade picnic. How many pizzas were there for each of the three classes of sixth graders? (No remainder change to fration)

*December 1, 2010*

**6th grade**

What are the 5 energy changes when a person jumps upward?

*December 1, 2010*

**physics**

Suppose you are riding a stationary exercise bicycle, and the electronic meter indicates that the wheel is rotating at 8.6 rad/s. The wheel has a radius of 0.30 m. If you ride the bike for 2070 s, how far would you have gone if the bike could move?

*November 30, 2010*

**chem**

158.5 mL of a AgNO3 solution at 5.0M was combined with a 3.5M CaCl2 solution. 110.5g of AgCl was recovered. Given that the CaCl2 is the limiting reagent, how many milliliters of the 3.5M CaCl2 solution was used? 2 sig figs

*November 29, 2010*

**chem**

A solution is prepared with 50.0 g of HNO3 and 130.0 g of H2O. It has a density of 1.21 g/mL. What is its molarity (M)?

*November 29, 2010*

**Confidentiality in Allied Health**

ok I have written my paper all except for the last 3 questions. I found the previous ones in my textbook or on ama but now im stuck on where to find the resources

*November 28, 2010*

**Math**

A standard number cubes with the numbers 1 through 6 is rolled. Find the probability of rolling a number greater than 2.

*November 27, 2010*

**Math**

Bert has a bag with 12 blue marbles, 6 green marbles, 8 purple marbles, and 4 red marbles. If he want the probability of picking a blue marble to be 1/2 what should he do?

*November 27, 2010*

**7th grade**

The Diameter of a cone is x, in., the height is 12 in and the volume is 36piin cube what is x

*November 26, 2010*

**BPC110**

Nevermind I understand. Thank you.

*November 26, 2010*

**BPC110**

It schould be "marquee series office 2007." I forgot to put OFFICE in there.

*November 26, 2010*

**BPC110**

It is a book, I do online schooling and have multiple short answers I need to turn in and fix in apa format. It seems different sites show different examples. One shows the location needing to be in there, and others don't. I just went off of the webstite you mentioned.

*November 26, 2010*

**BPC110**

Thank you very much I bookmarked it. Does this look like I am on the right track or does it look wrong? Rutkosky,N., Seguin, D., & Roggenkamp Rutosky, A. (2008). Marquee Series 2007.

*November 26, 2010*

**BPC110**

I am using Marquee Series Office 2007 by Nita Rutosky, Denise Sequin, and Audrey Rutosky Roggenkamp. Thanks in advance!

*November 26, 2010*

**BPC110**

Hello, I am trying to use APA format. I did some short answers and found answers in my text book, and there are 3 authors. I am just very confused if I do in cite notation, put the citation at the very bottom of each question I answered, or what. If someone could help me I ...

*November 26, 2010*

**Math**

What are some Quartile examples?

*November 25, 2010*

**Probability & Odds**

What are some examples of probability and odds?

*November 25, 2010*

**phys**

A 1155-N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A W = 1915-N crate hangs from the far end of the beam. (a) Using the data shown in the drawing, find the magnitude of the tension in the wire. (b) Using the data shown...

*November 24, 2010*

**physics**

I tried that it didn't get me the right answer. I got -492.

*November 23, 2010*

**physics**

Two children hang by their hands from the same tree branch. The branch is straight, and grows out from the tree trunk at an angle of 27.1° above the horizontal. One child, with a mass of 42.4 kg, is hanging 1.22 m along the branch from the tree trunk. The other child, with...

*November 23, 2010*

**physics**

In 9.2 s a fisherman winds 2.1 m of fishing line onto a reel whose radius is 3.0 cm (assumed to be constant as an approximation). The line is being reeled in at a constant speed. Determine the angular speed of the reel.

*November 18, 2010*

**physics**

After 10.0 s, a spinning roulette wheel at a casino has slowed down to an angular velocity of +1.74 rad/s. During this time, the wheel has an angular acceleration of -5.1 rad/s2. Determine the angular displacement of the wheel.

*November 18, 2010*