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October 20, 2014

Posts by katie


Total # Posts: 1,677

chemistry
i didnt know ph could be greater than 14 and poh less than 0
January 22, 2012

chemistry
A solution of NaOH(aq) contains 6.2 g of NaOH(s) per 100.0 mL of solution. Calculate the pH and the pOH of the solution at 25 °C.
January 22, 2012

chemistry
A solution of NaOH(aq) contains 6.2 g of NaOH(s) per 100.0 mL of solution. Calculate the pH and the pOH of the solution at 25 °C.
January 22, 2012

science/anatomy
common pathways for food and air are the (1), which connects to the mouth, and (2), which connects to the larynx. Epithelium in this region is (3), which provideds good protection from friction. Three bands of skeletal muscle, the (4) propel food into the (5). Entrance to the ...
January 19, 2012

ENGLISH
I have to write an essay about whether or not Jonathan Swift's "A Modest Proposal" was effective as a satire. one quote i have is "I have been assured by a very knowing American of my acquaintance in London, that a young healthy child well nursed, is, at a ...
January 17, 2012

science
how is eating breakfast important to prevent fainting
January 16, 2012

SCIENCE
what are the physiological benefits of eating breakfast. what are the physiological occurances or causes of fainting (syncope). how are these two ^ related and what is the significance
January 16, 2012

ANATOMY
what are the physiological benefits of eating breakfast. what are the physiological occurances or causes of fainting (syncope). how are these two ^ related and what is the significance
January 16, 2012

math
yo mama
January 8, 2012

Math
Please check- I got 10 4(9-2)/2^2+3
January 5, 2012

MATH
Look at this inequality 4m-9<2m-3 Solve the inequality for m. PLEASE HELP ME! CAN YOU PLEASE DO IT STEP BY STEP?
December 30, 2011

algebra
haaaa
December 15, 2011

Business Statistics
Instructions: Prepare your answers using Excel and show your work to get full or partial credit. Question 1: Using the file Wages.xlsx which contains information of working individuals, for a nationwide firm (Value 7 points). a) Run Descriptive Statistics for the variables ...
December 14, 2011

College English
How can I compare "Mother Night" by Vonnegut and "Song of Solomon" by Morrison in terms of Postmodernism?
December 11, 2011

Statistics
A shipment of portable radios contains 14 good radios and 3 defective ones. If two are randomly selected (without replacement) and tested, find the probability that at least one will be defective.
December 10, 2011

Statistics
A shipment of portable radios contains 14 good radios and 3 defective ones. If two are randomly selected (without replacement) and tested, find the probability that at least one will be defective.
December 10, 2011

calculus II
Do a u substitution. u= 1- sqrt(x) du = -(1/(2*sqrt(x)))dx Change your limits by plugging them into the u equation. u= 1 - sqrt(0) = 1-0 = 1 u= 1 - sqrt(9/16) = 1-(3/4) = 1/4 Substitute the u values in for x. The new integral is -2*sqrt(u) du from [1,1/4] OR 2*sqrt(u) du from...
December 10, 2011

------college algebra division
Whoops, some of it didn't line up, but I used the long division method
December 10, 2011

------college algebra division
5x^2 -3x -18 +((12x+71)/(x^2+4)) ___________________________ x^2 +4| 5x^4 -3x^3 +2x^2 +0x -1 -5x^4 -20x^2 --------------------------- -3x^3 -18x^2 +0x -1 +3x^2 +12x --------------------- -18x^2+12x -1 +18x^2 +72 --------------- 12x +71
December 10, 2011

statistics
The claim: mean < 900 other option: mean > or = 900 The null hypothesis is the one with an equal sign... Your null hypothesis would be mean=900 Your alt. hypothesis would be mean<900 The alt. hypothesis is the claim.
December 9, 2011

history
Levy's purpose in the film Crimes and Misdemeanors
December 8, 2011

Math
On a grid, an upright square is a square that is well, upright, on one of its sides, with the sides going along the grid points.
December 5, 2011

Math
I need help on this question, I know the answer (or, at least I think I know it), but I can't think of the rest. Bobby claims that only upright squares can have rational numbers for side lengths. Is he correct? Explain. I got yes, he is correct, but I can't hink of an ...
December 5, 2011

Science
Well, you can write down what your phenotypes are (how you look, ex: eye color, hair color, hair type, etc.) and then by using that, you canfigure out your genotypes by researching whether each of your traits are dominant or recessive. For example, I have a straight hairline, ...
December 5, 2011

Chemistry
Suppose 33.5 g of ClF3(g) and 29.1 g of Li(s) are mixed and allowed to react at atmospheric pressure and 25 C until one of the reactants is used up, producing LiCl(s) and LiF(s). Using the NIST value for the enthalpy of formation of ClF3 (webbook.nist.gov), calculate the ...
December 4, 2011

Chemistry
A 2.3 g sample of C5H10O is burned completely in excess oxygen to yield CO2(g) and H2O(l) at 25 C, releasing 83.42 kJ of energy. What is the enthalpy of formation of C5H10O?
December 4, 2011

chemistry
Calculate the volume of natural gas (methane) required to bring 2.6 L of water to a boil. Assume the initial temperature of the water is 21 C, and the methane is at 1 bar and 25 C. Assume that methane is an ideal gas, the specific heat capacity of water to be constant and ...
December 4, 2011

Thermochemistry
Hint: Write the balanced combustion reaction. You can find the standard enthalpies of formation for O2, CO2, and H2O from many sources, including the CRC Handbook of Chemistry and Physics. Solution: Balanced combustion reaction: C8H18 + 12.5 O2 --> 8 CO2 + 9 H2O From the ...
December 4, 2011

Physics
Pam has a mass of 44.0 kg and she is at rest on smooth, level, frictionless ice. Pam straps on a rocket pack. The rocket supplies a constant force for 22.0 m and Pam acquires a speed of 58.0 m/s.
December 1, 2011

Science 7R (Lab questions)
Animal cells lack in a cell wall. Plant cells have it.
December 1, 2011

trig
pi/3 is 7 square root 3/ 2 pi is - 7 square root 3 / 2 and 7pi/6 is -7
November 29, 2011

trig
i didn't realize it was just plugging in! thanks! i just need to figure out how to subtract fractions with pi in them now
November 29, 2011

trig
For the following expression, find the value of y that corresponds to each value of x, then write your results as ordered pairs (x,y). y=7cos(x-pi/6) for x=pi/6, pi/3, 2pi/3, pi, 7pi/6
November 29, 2011

chemistry
Which of the following sets of solute and solvents will make a homogeneous solution? (naphthalene is a non-polar organic molecule) 1. Water and benzene 2. Benzene and ammonium nitrate 3. Benzene and naphthalene 4. Water and naphthalene
November 29, 2011

chemistry
What is the molecular geometry for SH2? 1. Bent 2. Trigonal planar 3. Tetrahedral 4. Liner
November 29, 2011

chemistry
What volume of a 7.00 M solution of Ca(OH)2 is needed to neutralize 37.2 mL of a 3 M solution of nitric acid? 1. 15.9 mL 2. 37.2 mL 3. 7.97 mL 4. 24.2 mL
November 29, 2011

chemistry
What is the mass percent of a solution if 42.9 grams of aspirin is dissolved into 175 mL of ethanol? (Density of ethanol is 0.789 g/mL) 1. 31.1 % 2. 24.5 % 3. 23.7 % 4. 19.7 %
November 29, 2011

chemistry
How many moles of NaOH are in 23.5 mL of a 1.50 M solution? 1. 0.0353 moles 2. 35.26 moles 3. 16.7 moles 4. 0.0235 moles
November 29, 2011

chemistry
What is the mass percent of a solution if 42.9 grams of aspirin is dissolved into 175 mL of ethanol? (Density of ethanol is 0.789 g/mL
November 29, 2011

calculus
Let f''(x)=5x+5 with f'(2)=1 and f(-2)=2. Find f'(x) and f(3)?
November 28, 2011

calculus
Consider the function whose second derivative is f''(x)=7x+6sin(x). If f(0)=2 and f'(0)=3 , find f(x) .
November 28, 2011

MATH HELP!
if f(x)+(x-3)^4(2x-1)^3, find the value(s) of x which solve f'(x)=0
November 28, 2011

Physics
A great white shark with a mass of 3000 kg swimming at 3.00 m/s swallows a 250 kg fish at rest. What is the speed of the great white shark right after swallowing the fish?
November 28, 2011

MATH
if f(x)=(x-3)^4(2x+1)^3 find the value(s) of x which solve f'(x)=0
November 27, 2011

MATH
Complete the indefinite integral: ∫(x^2+1)^2 dx
November 26, 2011

SCIENCE
the brachialis is a short stout muscle inserting cloes to the fulcrum of the elbow joint' the brachioradialis is a slender muscle inserting distally, well way from the fulcrum of the elbow joint. Which is a mechanical advantage and which is a disadvantage
November 22, 2011

anatomy
In the body, lever systems involve the interaction of __1__, which provide the force, and __2__, which provide the lever arms. The force is exerted where __3__. The site at which movement occurs in each case is the intervening __4__, which acts as a fulcrum. 1. muscles? 2. ...
November 22, 2011

ANATOMY
place the following in order (1-11): Myosin heads bind to active sites on actin molecules ATP is hydrolyzed Myosin heads return to their high-energy shape(******), ready for the next working stroke Calcium ions bind to troponin Cycling continues until calcium ions are ...
November 15, 2011

MATH
Find the value of A + B if the A is the first term and B is the common difference of the sequence whose 4th term is 3 and 20th term is 35
November 7, 2011

MATH HELP!
find all possible values of the common ratio of the geometric sequence a, b, 6, ... if a+b=1
November 7, 2011

Physics
A wire is frictionless between points A and B and rough between B and C. A is 5m above the ground, B is zero, and C is 2m above the ground. The 0.400kg bead starts from rest at A. If the bead comes to rest at C, find the loss in mechanical energy as it goes from B to C. I can...
November 6, 2011

Physics
An Alaskan rescue plane traveling 36 m/s drops a package of emergency rations from a height of 137 m to a stranded party of explorers.Where does the package strike the ground relative to the point directly below where it was released
November 3, 2011

MATH
given the arithmetic sequence 71,65,59 ... if a(n) is -43 what is the value of n
October 31, 2011

MATH
a pile of bricks has 85 bricks in the bottom row, 79 bricks in the second row, 73 in the third row, and so on until there is only 1 brick in the top row. how many bricks are in the 12th row? how many rows are there in all?
October 31, 2011

chemistry
If 58g of NaOH are dissolved in water to make a final volume of exactly 400mL, what is the molar concentration of NaOH? (The FM of NaOH = 40.0) How do I set this up?
October 31, 2011

algebra
i need help with my math for college, im currently a little behind, ive had 2 tutors but the tutors that ive had dont really know what there doing, this is stressful and im hopig someone who knows what there doing can help me
October 30, 2011

HELP
subtract simplify by removing factor of 1 if possible 3bc/b^2-c^2-b-c/b+C
October 28, 2011

Help
Solve the equation q+7/4+q-3/3=5/2 I think there is no solution
October 28, 2011

Help
Divide and simplify x^2-16/x divide by x+4/x+1 I get (x-4)(x+1)/X is this correct
October 28, 2011

Help
simplify by removing factor of 1 7z-49/7z I have the answer as -7
October 28, 2011

Help
Find the LCM t^3+8t^2+16,t^2-8t
October 28, 2011

help
I will try my best
October 28, 2011

help
find all numbers for which the rational expression is undefinded 8/8z+7 I think the expression is undefined for all real numbers
October 28, 2011

HELP
simplify remove factors of 1 3v-9/3-v
October 28, 2011

HELP
multiply and simplify 3a^8/4t^2*16t^4/9a I have the answwer as 4a^7t^2/3t^2
October 27, 2011

HELP
multiply and simplify 3a^8/4t^2*16t^4/9a I have the answwer as 4a^7t^2/3t^2
October 27, 2011

Help
Find the LCM of 3(t-2)and 6(t-2) is it 18(t-2)
October 27, 2011

Help
Lisa can shovel her drive way in 35 minutes. Tom can shovel the same drive way in 40 minutes. How long will it take them to do the job together?
October 27, 2011

MATH
lim x-->0 x^2+3x/x^2-3x x not =0 1 x=0
October 25, 2011

calculus
A child is flying a kite. If the kite is 125 feet above the child's hand level and the wind is blowing it on a horizontal course at 7 feet per second, the child is letting out cord at _____ feet per second when 245 feet of cord are out. Assume that the cord remains ...
October 25, 2011

Social Studies
I have a midterm tomorrow and this is the essay question: “When men’s minds seem narrow to you, tell yourself that the land of God is broad; broad His hands and broad His heart. Never hesitate to go far away, beyond all seas, all frontiers, all countries, all beliefs...
October 23, 2011

art history
Discuss the ideological and visual differences between Renaissance Art and Baroque Art. (think in terms of, for example, religion, society, and scientific discoveries)
October 16, 2011

chemistry
WHat is a precipitate?
October 16, 2011

MATHHH HELPPPP
3b+7=-2 14+h/5=2 h/5=fraction m/8+4=16 m/8=fraction 3x-1=8 35=3+5x -3+m/3=12 m/3=fraction -x-4=-20 5=-z-3
October 11, 2011

algebra
3b+7=-2 14+h/5=2 h/5=fraction m/8+4=16 m/8=fraction 3x-1=8 35=3+5x -3+m/3=12 m/3=fraction -x-4=-20 5=-z-3
October 11, 2011

PLEASE HELP ME SOLVE !!!!!!!!
A mass of 11 kg is placed on a frictionless incline which is inclined at an angle of 69 degrees above the horizontal. It is held in place by a rope which is attached to a wall at the top of the incline. The rope is angled 13 degrees above the direction parallel to the incline...
October 6, 2011

Physics
a car traveling westward at 20 m/s turns around and travels eastward at 5 m/s. what is the change in velocity of the car?
October 5, 2011

physics
help
October 4, 2011

MATH
a box contains 20 slips of papers, numbered 1-20. A slip of paper is drawn from the box and the number is noted. Find the probability that it is a positive integer less than 21.
October 3, 2011

math
if a set of six books is placed randomly on a shelf, what is the probability that they will be arranged in either correct or reverse order?
October 3, 2011

math
In how many ways can the letters of the word EIGHT be arranged using only four of the letters at a time?
October 3, 2011

math
Solve for y, then find the value of y when given x = –2. 6x = 7 – 4y
September 29, 2011

math
Mr. and Mrs. Smith each bought 10 raffle tickets. Each of their three children bought four tickets. If 4280 tickets were sold in all, what is the probability that the grand prize winner is: a. Mr. or Mrs. Smith? b. one of the 5 Smiths? c. none of the Smiths?
September 27, 2011

beowulf
why was the importance of adding the passage about Queen Modthryth in Beowulf?
September 27, 2011

math
Doug has 170 stamps in his collection. His first book of stamps has 30 more stamps in it than his second book how many stamps are in each book. how do you figure out what P is? Divide 170 by 2?
September 27, 2011

MATH
find the coordinate of the center and identify the conic: 5y^2 - 2x^2 - 10y - 12x = 23
September 26, 2011

english
what is a good kenning for the ocean
September 26, 2011

math
it would be possible to have 3 quarters, 4 dimes, and 4 pennies in your pocket and not be able to make change for a dollar, so the answer would be $1.19.
September 26, 2011

Math 116a
solve by elimination 5r-6s=18 6r-5s=46 The solution is There are infinitely many solutions there is no solution
September 26, 2011

math 116A
functions f(-1)=5x^2-3x 5(1)^2-3(-1)=28 correct I hope
September 26, 2011

math 116a
use distributive property to solve the equation 4(w-3)=-12 W=0
September 26, 2011

math 116
Solve using the multiplication principle Dont forget to preform a check 11x=-99 Would the answer be -9?
September 26, 2011

Math 116a
solve using the addition and multiplacation principles 1+6x<49 would I subtract 1 and divide 48 by 6 to find X? x=8
September 26, 2011

Math 116a
Find the slope X=-4 if it exists. Don't I need the Y to find a slope?
September 26, 2011

Math 116
Yeh I think I got figured now thank you
September 26, 2011

Math 116
The length of a rectangle is fixed at 23cm What lengths will make the perimeter greater then 86cm? Then length must be greater then cm. would it be 20cm? l+l+23+23>86 2l+46>86 2l>40 l>20?
September 26, 2011

Math 116a
you're awsome
September 26, 2011

Math 116a
ok I get it the regular price is 82.61 ThankYou
September 26, 2011

Math 116a
would it be 79.30 66.09+20%
September 26, 2011

Math 116a
Amy bought a pair of running shoes she paid $66.09 during a 20% off sale, what is the regular price of the shoes? Would I take 66.09 divide by 20%?
September 26, 2011

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