Posts by katie

Total # Posts: 2,140

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

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

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

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

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?

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

MATH
Complete the indefinite integral: ∫(x^2+1)^2 dx

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

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. ...

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 ...

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

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

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...

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

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

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?

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?

algebra
i need help with my math for college, im currently a little behind, ive had 2 tutors but the tutors that ive had don't really know what there doing, this is stressful and im hopig someone who knows what there doing can help me

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

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

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

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

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

help
I will try my best

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

HELP
simplify remove factors of 1 3v-9/3-v

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

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

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

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?

MATH
lim x-->0 x^2+3x/x^2-3x x not =0 1 x=0

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 ...

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...

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)

chemistry
WHat is a precipitate?

MATH 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

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

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...

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?

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.

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?

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

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

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?

beowulf
why was the importance of adding the passage about Queen Modthryth in Beowulf?

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?

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

english
what is a good kenning for the ocean

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.

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

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

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

math 116
Solve using the multiplication principle Don't forget to preform a check 11x=-99 Would the answer be -9?

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

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

Math 116
Yeh I think I got figured now thank you

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?

Math 116a
you're awsome

Math 116a
ok I get it the regular price is 82.61 ThankYou

Math 116a
would it be 79.30 66.09+20%

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%?

Math
-5/6x=-7/8 what is x? would it be 1/4? I don't know how to do this?

Math 116a
oh yes -9+7=-2 duh thanks

Math 116a
Collect Like Terms 15p+7q-4p-9q I get the answe 11p+2q/ I hope I am doing theis correctly.

Math 116A
Cool thankyou I amn trying to figure this stuff out

Math 116A
Simplify 8[56-(-86-32)]= Would thid be 1392 is that what is ment by simplify?

Math 116 a
I got 48/15 divide 48 by 15 and I got 3.2 how does 302 turn into 16/5?

Math 116 a
How do you get that?

Math 116 a
ok thank you

Math 116 a
multiply -8/3*(-6/5)= would it be 48/15? I can remember how to multiply fractions help

Math 116a
Translate to an algebraic expression The product of 45% and some number the translation is? Would it be .45/x?

Math 116a
OH my gosh I remember now sorry now I remember.

Math 116a
What is that? PEMDAS?

Math 116a
Ok thank you I try to put an answer to to see if I am right is that ok?

Math 116a
Evaluate a+b/9= A=51 and B=3 Would I substitute a and B to be 54 so is the answer 6?

pre calc
A math teacher uses four algebra books, two geometry books, and three pre-calculus books for reference. In how many ways can the teacher arrange the books on the shelf if books coiver the same subject matter are kept together?

Fractions
I got it x>93/72?

Math the end
The answers are -5 and -3 I need to know hoe to write the solution {x x> } help

Math the end
Can domeone help me with this? solve 7x + 4 ¡Ý - 31 or 9x + 4 ¡Ý - 21 I need to know how to write the solution {x x> } This is my last day of this class

math
A Freight train passed through a town. Behind the engine was the coal car. The cattle car was between the milk car and the lumber car. The open boxcar was in front of the flat car but directly behind the milk car. Of course, a caboose was at the end. In what order were the ...

Math
Thank You

Math 116a
Solve and Graph 2x+9¡Ý5 and 2x-13¡Ý-9 The solution is {x|x¡Ý } Help

Math 116a
Solve 9/10(3+8x)+3¡Ý15 The solution is {x|x }

Algebra 116 A
solve and graph 2x+9 greater or equal to 5 and 2x-13 greater or equal to -9 the solution is {x x greater or equal to ?} What is the ? help

Algebra 116 A
I thought I needed Brackets or such

Algebra 116 A
I need to write an interval notion for 9<x<14 = how do I write this?

Chemistry
What is the frequency of radiation that has a wavelength of 12um about the size of a bacterium

Math
Yes

Thanks Steve

Math
Solve 3(3-8x)+5<2(9+6x) Use set builder notion to describe the solution? I got x=9/31 is this correct???

Math
What is the classify system of Y=-3 and X=2

Math
What is the classify system of Y=-3 and X=2

math
.0051813

Algebra 116 A
What kind of interval notion do you get for this 9<x<14?

Math help!!
Solve 3(3-8x)+5<2(9+6x) Use set builder notion to describe the solution? I got x=9/31 is this correct???

Math 116
Solve 3(3-8x)+5<2(9+6x) Use set builder notion to describe the solution? I got x=9/31 is this correct???

Math 116a
Graph and write the interval notion? 9<x<14

Math 116 A
Do I use the [ ] or the () on the number line?

Math 116 A
7X+4>-13 or 9x+4>-23 The solution of the compound inequality is ? I am totally lost!!!!!!!!

Math a
7X+4>-13 or 9x+4>-23 The solution of the compound inequality is ? I am