Sunday

October 26, 2014

October 26, 2014

Total # Posts: 236

**Physics**

Consider the skateboarder in the figure below. If she has a mass of 57 kg, an initial velocity of 21 m/s, and a velocity of 10 m/s at the top of the ramp, what is the work done by friction on the skateboarder? Ignore the kinetic energy of the skateboard's wheels. The ...
*October 17, 2014*

**Physics**

A crate of mass 54 kg is attached to one end of a string, and the other end of the string runs over a pulley and is held by a person as in the figure below. If the person pulls with a force of 93 N, what is the crate's acceleration? (Assume that upward is the positive ...
*September 23, 2014*

**Physics**

Your friend is an environmentalist who is living in a tree for the summer. You are helping provide her with food, and you do so by throwing small packages up to her tree house. If her tree house is 21 m above the ground, what is the minimum (initial) speed you must use when ...
*September 23, 2014*

**Physics**

Two children are playing on a 147-m-tall bridge. One child drops a rock (initial velocity zero) at t = 0. The other waits 1.2 s and then throws a rock downward with an initial speed v0. If the two rocks hit the ground at the same time, what is v0?
*September 23, 2014*

**Physics**

A hockey puck slides with an initial speed of 48 m/s on a large frozen lake. If the coefficient of kinetic friction between the puck and the ice is 0.030, what is the speed of the puck after 11 s?
*September 23, 2014*

**compound interest**

$873.6
*August 26, 2014*

**Us history**

In the monroe doctrine what does the United States say it will do if any European colonies in North or South America declare their independence?
*August 20, 2014*

**Us history**

Put this into everyday wording "manifestation of an unfriendly disposition toward the United States.”
*August 20, 2014*

**physics**

Vector has a magnitude of 5.10 units and points due east. Vector points due north. (a) What is the magnitude of , if the vector + points 27.4 ° north of east? (b) Find the magnitude of + .
*February 4, 2014*

**language art**

ok..can you send me a website to study phrases and clauses.
*December 18, 2013*

**language art**

7.D 9.C 11.D *Going with my second choice, are they right*
*December 18, 2013*

**language art**

2.A 3.A 7.A 8.B 9.B 11.C
*December 18, 2013*

**language art**

1.Chris was being OBNOXIOUS when he -told Mrs.Kelly it was a great day for a race. -insulted Gina's new haircut. -kept the little kids' ball from going into the street. -returned Mr.Cho's keys. 2.If something is STATELY, it is -impressive -informal -common -tacky 3...
*December 18, 2013*

**Calculus-Area between curves**

Thanks I figured it out my answer was 9, and it was correct
*November 21, 2013*

**Calculus-Area between curves **

Sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Then find the area of the region. 2y=4*sqrt(x) , y=5 and 2y+4x=8 please help! i've been trying this problem the last couple days, even asked a TA for help, but i can't ...
*November 21, 2013*

**Fundamental Theorm of Calculus**

Find the average value of f(x)=7x^{-2} on the interval [1,5]
*November 20, 2013*

**HCA/220**

I need help with a discussion question due in week 8. You work in a training and development department of a medical facility. You are asked to develop a training manual for a new employee with no medical terminology background. The new hire will work in orthopedics department...
*October 23, 2013*

**geometry**

two angles, a and b are complementary if the sum of their measure is 90 degrees. If angle a is 21 degrees more than twice angle b find the measures of angles a and b. I would like to know how to set this equation up in order to find the answer.
*September 21, 2013*

**math**

in her coin collection, holly has 1/3 more coins than jim has in his collection. if the number of coins in 1/2 of holly's collection is 10 more than the number of coins in 1/3 of jim's collection, how many coins does each have?
*April 2, 2013*

**chemistry**

In Flask A, you reacted 5.10 g Mg with 0.447 mol HCl. In Flask B, you reacted 24.21 g Mg with 0.998 mol HCl. Which ballon will inflate the most?
*March 25, 2013*

**Sociology**

This is the reason an employer might restrict employee internet access? a. Employees waste too much time on the internet b. viewing certain kinds of sites could lead to a hostile work environment
*March 10, 2013*

**Sociology**

philosophers suggest arguments should be won by? a. the best argument b. a coin flip c.the person who feels most strongly about the issue d. vilence
*February 17, 2013*

**Algebra**

The length of a rectangular garden is 4 m greater than the width. the area is 77m^2. find the dimensions of the garden.
*February 6, 2013*

**Averages**

Find the average. 39, 47, 52 I got an answer of 46. Is this correct?
*January 31, 2013*

**Help Math**

I got b now thank you
*December 30, 2012*

**Help Math**

P(A)=0.40 P(B)=0.25 The probability of both events occurring is 0.15. What is the probability of either event occurring? A. 0.15 B. 0.50 C. 0.65 D. 0.80 Is it D?
*December 30, 2012*

**Help Math**

Ok thank you
*December 30, 2012*

**Help Math**

Events A and B are mutually exclusive. The probability of event A occurring is0.15; the probability of event B occurring is 0.45; what is the probability that A and B will occur? A.0.30 B.0.60 C.1 D.0.40 I think C am I correct?
*December 30, 2012*

**Math**

A non normal population is determined to have a mean of 60 and a standard deviation of 4. Ninety six percent of all observed values will occur in what range? A.52.16-67.84 B.50-60 C.48-72 D.40-80 I think A am I correct?
*December 29, 2012*

**calc**

f(x) is a polynomial function such that f(-2)=5, f'(-2)=0, and f''(-2)=+3. The point (-2,5) must be an _______ of the graph of f(x) A) relaltive max B) intercept C) point of inflection D) relative min
*November 26, 2012*

**calc**

find the absolute maximum and minimum for f(x) = x+ sin(x) on the closed interval [0, 2pi]
*November 26, 2012*

**Math**

Idk how to do this! :( Write an equation of the line that passes through the given point and is perpendicular to the given line (1,-1), y=3x+2
*April 12, 2012*

**geometry**

ABCD is a parallelogram. BM= 22-3x, DM=10+9x, AM=7y+13 and CM=2y+38. solve for x and y
*January 17, 2012*

**Math**

To buy both a new car and a new house, Tina sought two loans totalling $319.531. The simple interest rate on the first loan was 2.7%, while the simple interest rate on the second loan was 2.6%. At the end of the first year, Tina paid a combined interest payment of $8334.15. ...
*January 11, 2012*

**math**

Solve using the elimination method. 4x+3y=-45.5 -5x+8y=-43
*January 11, 2012*

**Math**

Solve using the elimination method. -3x+6y=-3 -6x+4y=-10
*January 11, 2012*

**Math**

Solve using the substitution method -x-3y=-20 5x+3y=40
*January 11, 2012*

**algebra**

i need help understanding the breakdown of this equation. 9x=7y=1 x=13-4y
*May 29, 2011*

**Chemistry**

SO3 + H2O = H2SO4 If you react 34 g of water and have excess SO3, how much H2SO4 would you theoretically produce
*March 15, 2011*

**AP government**

"if the general public benefits from entrepreneurial politics why aren't such policies fueled by a social movement or other mass form of political acitivsm?"
*March 14, 2011*

**PHYSICS!!**

free body diagram of a 4 kg bucket accelerating downward 2 meters per second squared
*March 14, 2011*

**PHYSICS!!**

a student pushes a 10 kg box across a warehouse floor. if the boz accelerates at 3 m/s/s and the force of friction is 20 newtons determine the size of the students applied force
*March 14, 2011*

**english **

I know it's a bit too late to help, but just for anyone else needing help, I can help. I'm working on this assignment right now and so far only have two paragraphs. First, in similarity, they lived in close time periods (both lived in 20th century) and were very poor. ...
*January 12, 2011*

**art apreciation **

the style ofart produced at the palace of versailles during the reign of king louis XV would today be called a. mannerist b. rococo C. baroque D. classical
*November 26, 2010*

**Statistics**

Two ways in which practical statistics outweighs statistical significance?
*November 22, 2010*

**Math **

Use the data set {-100, -99, -98, ........-2, -1} to answer the following question. The data set has a first quartile of?
*November 6, 2010*

**statistics**

Use the data set {0,4,4,8,4,16} to answer the following question. The mean of the data set is?
*November 6, 2010*

**data management g12**

a bridge hand consists of 13 cards. how many bridge hands include 5 cards of one suit, 6 of a second, and 2 cards of a third?
*October 31, 2010*

**Algebra 2**

How would I put this word problem into a system of equations (three equations)? Once its in equation form I can easily solve it... A natural food store makes its own brand of trail mix out of dried apples, raisins, and peanuts. One pound of the mixture costs $3.18. It contains...
*September 28, 2010*

**Algbebra 2**

How would I put this word problem into a system of equations (three equations)? Once its in equation form I can easily solve it... A natural food store makes its own brand of trail mix out of dried apples, raisins, and peanuts. One pound of the mixture costs $3.18. It contains...
*September 28, 2010*

**Algebra 2**

How would I put the following equations into y=mx+b form? x+y=4 -4x+y=9
*September 22, 2010*

**geometry**

Use the distance formula. I tried giving you a link but I cant.. so you can look it up. Its the square root of x sub minus plus x sub one squared, plus y sub two minus y sub one squared. Its a mouthful! So just look it up and plug in the appropriate numbers. :)
*September 22, 2010*

**ap java**

an old-fashioned computer has just 16 bits available to represent an address of a memory location. how many total memory locations can be addressed in this machine? what formula would i use to find this answer?
*September 12, 2010*

**history**

why did president harry truman fired general douglas macarthur from his command of american forces in east asia during the cold war?
*April 9, 2010*

**history**

during WWII
*April 9, 2010*

**history**

what was the key U.S. government memorandum that militarized american foreign policy and indicated national faith in the economy's capacity to sustain large military expenditures ?
*April 9, 2010*

**chem**

when doing a paper chromatography lab, my class used a solvent with a neutral pH, which my teacher said would help seperate the amino acids with simialar Rf values. can anyone please explain why we needed to use a solvent with a neutral pH?
*March 28, 2010*

**6th grade math**

25% of 100
*March 9, 2010*

**spanish**

550.330 translated in spanish please?
*February 21, 2010*

**spanish 1**

201 in spanish?
*February 21, 2010*

**spanish**

Quien es el chico?
*February 21, 2010*

**chem**

do esterification reactions have high or low yields? and why is this?
*February 10, 2010*

**chem**

do esterification reactions have high or low yields? and why is this?
*February 10, 2010*

**chem**

do esterification reactions have high or low yields? and why is this?
*February 10, 2010*

**organic**

what kind of products are esters added to?
*February 10, 2010*

**organic**

do esterification reactions usually have a high yield of the desired ester?
*February 10, 2010*

**organic chem!**

when trying to purify aspirin, why would i have to add hot water to the crystals that are formed, and then recool the crystals? what does this do to the crystals?
*January 24, 2010*

**aspirin**

during the synthesis of aspirin, why do the crystals mostly form when the test tube is placed in the ice bath and not before?
*January 24, 2010*

**biochem**

When making Aspirin, I know that sulfuric acid is used as a catalyst. But i was wondering 1.) if the reaction would happen without the cataylst and 2.) can other substances be used as a cataylst in this reaction?
*January 24, 2010*

**Chemistry**

I placed the 0.1 in the wrong part of the equation.... so the normality is 0.14
*December 14, 2009*

**Chemistry**

Suppose you are titrating an unknown acid soluition with 0.100 N KOH. What is the normality of the acid if 25.00 mL of it requires 35.20 mL of base? I got 0.07 N I am not sure if I did the problem correctly and need some help.
*December 14, 2009*

**Geometry**

The diagonals of rectangle ABCD are AC and BD. Hallie found that the distances from the point where the diagonals intersects to each vertex were the same. Which of the following conjectures could she make? a. Diagonals of a rectangle are congruent. b. Diagonals of a rectangle ...
*December 10, 2009*

**Math**

Or you could just count how many numbers Ms. Sue provided and multiply by three for your total number of possiblities.
*December 10, 2009*

**Writing a 2 column proof..**

I have no idea where to start! and I've got lots of these to write. Directions say write a two-column proof... Given: segment AB is congruent to segment XY, AC is is congruent to XZ, and BC is congruent to YZ. Prove: triangle ABC is congruent to triangle XYZ
*November 11, 2009*

**management**

Describe the differences between the directional, portfolio, and parenting strategies. In addition, describe when you would use these major types of strategies.
*November 10, 2009*

**Equation stuff...**

Write your answer in standard form with integer coefficients. 1. (-5, 2); m = 2/5 2.(-6, -1); m=-4 how do i do this?
*October 26, 2009*

**history**

I know what the Sumner/Brooks affair is, but how did it play a role in leading up to the civil war?
*October 25, 2009*

**biochem**

If you were to place a bacteria that could form spores in a stressful environment, what would the cell morphology look like?
*October 20, 2009*

**micro biology**

what would a spore former (bacteria) look like if you forgot the safranin stain?
*October 20, 2009*

**english**

would it be implacable?
*October 17, 2009*

**english**

He was ____ in his pledge to complete the project on time and under budget. what word: implacable, disgruntle, or illusory?
*October 17, 2009*

**english**

Their fears proved ___ as the tower is a triumph of design what word could fit? disgruntle illusory implacable i know what the words mean, i just don't know which one would fit
*October 17, 2009*

**Dichotymus key...**

I just some tips and help with a dichotymus key I'm doing in anatomy. (i hope I'm spelling it correctly) concerning simple structures of the skeletal system. Well there are 4 main classifications i chose to use; projections/processes, depressions/pits, cavities/...
*October 15, 2009*

**mathhhh helpppp!**

can someone please help me set up inequalities based on the info below?: jayanta is working to raise money for the homeless by sending information letters and making follow-up calls to local labor organizations and church gorups. She discovered that each church group requires ...
*October 15, 2009*

**math**

can someone please help me set up inequalities based on the info below?: jayanta is working to raise money for the homeless by sending information letters and making follow-up calls to local labor organizations and church gorups. She discovered that each church group requires ...
*October 15, 2009*

**Help with deductive reasoning**

Determine whether you can use the Law of Syllogism to reach a valid conclusion from each set of statements. 1. If a dog eats Superdog Dog Food, he will be happy. Rover is happy. 2. If an angle is supplementary to an obtuse angle, then it is acute. If an angle is acute, then ...
*October 5, 2009*

**human blood cells**

what cells are mostly seen in infections? red or white??
*October 4, 2009*

**Biology**

Relate to how the properties of water-evaporation, latent heat of vapourization, etc., contribute to drizzling rain causes flu, as opposed to pouring rain
*September 29, 2009*

**biochem**

Many of today’s antibacterial drugs work by interfering with the growth of cell walls, why do these drugs tend to have little toxic effect on humans?
*September 28, 2009*

**biochem**

Exactly 100 bacteria with a generation time of 30 min are introduced into fresh sterile broth at 8am and maintained at an optimum incubation temperature throughout the day. How many bacterian are present at 3pm? How many generation will take place by 5pm the same day?
*September 24, 2009*

**microbiology**

what is the equation of the resolving power of a microscope? can you please give an example problem too?
*September 21, 2009*

**mathhh!**

My teacher said we are supossed to solve this using systems of equations: Let a, b, and c be real numbers such that a-7b+8c=4 and 8a+4b-c=7. Then a^2-b^2+c^2= ? can someone please help?! i don't know what method to use to solve this or where to start
*September 13, 2009*

**math**

My teacher said we are supossed to solve this using systems of equations: Let a, b, and c be real numbers such that a-7b+8c=4 and 8a+4b-c=7. Then a^2-b^2+c^2= ? can someone please help?! i don't know what method to use to solve this or where to start
*September 13, 2009*

**MATH**

it would be (x^2)^3 + (8)^3 so you could factor it: (x^2 + 8)(x^4 - 8x^2 + 64)
*September 13, 2009*

**Range of function..**

What is the range of this function? {(-2, 4), (2, 0), (-3, 1), (3, 0)}
*September 8, 2009*

**Solving Inequalities?**

Ive been having problems with this soo... My first problem is this: Solve 2x-4(x+2)-6 < 0 Can someone help me step-by-step figure this out so i can at least finish the ones that are similiar to this one? Thankies
*September 3, 2009*

**chemistry**

What does it mean when the sulfuric acid is written ABOVE the arrow in a reaction?
*September 1, 2009*

**chem**

What is the amount of energy released when 3 carbon carbon triple bonds are broken?
*August 31, 2009*

**Geometry**

So are these the correct ordered pairs to the problems. Our teacher told us to find ordered pairs. 1. TX=2x+1,XW=x+7;TW 2. WX=x+5,TW=4x+5:TX 1. (1,8) 2. (3,17)
*August 25, 2009*