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June 26, 2016

Search: square root of (a^2+b^2)=a+b true or false

Number of results: 21,983

Geometry (PLEASE HELP!!!)
Please Please HELP!!!! I need the answer to this and i've worked it out but I don't know if it is correct... Please check my answer!!!! The polygons are regular polygons. Find the area of the shaded region to the nearest tenth. I can't post a picture of it but it shows a ...
April 14, 2016 by Becca

roots
what root goes in this blank? i can't figure it out. She wore ________sox at the beach. argyll bobby crew (none of which are roots, however; sorry) =( How about "no" (root of "nothing")? I hope this helps. Thanks for asking.
April 11, 2007 by Jordan

Algebra
There are 5 quadratics below. Four of them have two distinct roots each. The other has only one distinct root; find the value of that root. 4x^2+16x-9 2x^2+80x+400 x^2-6x-9 4x^2-12x+9 -x^2+14x+49
February 7, 2015 by Juliet

algebra
There are 5 quadratics below. Four of them have two distinct roots each. The other has only one distinct root; find the value of that root. 4x^2 +16x - 9 2x^2 + 80x + 400 x^2 - 6x - 9 4x^2 - 12x + 9 -x^2 + 14x + 49
February 11, 2016 by Zane

Algebra
Solve the quadratic equation. 3x^2-15x+18=0 I know that the formula to quadratic equation is x=-b+and-(square root)b^2-4ac divided by 2a. I know that a=3, b=-15 and c=18, then subsitute in and get two answers, my problem is that I keep getting an answer that does not work ...
April 22, 2010 by Lexie

Geography
1. Demographers report the population density of a country as a measure of total population relative to land size. TRUE FALSE Answer : true 2. Which of the following is not an example of adequate physiological population density? A. Cities such as Luxor, Cairo, and Alexandria ...
October 30, 2015 by Geo

geometry
I need to find the area of the shaded portion of a circle with a square in the middle all corners touching the circle. My square has a line measurement of 10 cm. I know that the area of the square is 100 cm(10 x 10). But I am not sure what to do with the circle. Is the ...
May 29, 2010 by bart

PRECAL!
Prove: (3cosx + 4sinx)^2 + (4cosx - 3sinx)^2=5 ...this is all under the square root sign. this is what i did please check. i multipied both binomials. but i get cos square x..and sincosx ..how do i combine them..please help! In this case, after multiplying binomials, there ...
March 27, 2007 by just

Phyiscs
True or false: When a system consists of several objects, each with their own mass and velocity, the linear momentum of the system as a whole is simply the product of the system's total mass and the velocity of the system's center of mass.
October 30, 2012 by Angelena

Physics-can anyone check my work?
A particle starts from the origin with velocity 2i m/s at t = 0 and moves in the xy plane with a varying acceleration given by 2 (sq root t) where is in meters per second squared and t is in seconds. (a) Determine the velocity of the particle as a function of time. So I ...
September 14, 2011 by Katie

Health
Please check 1. Which is a common viral disease? A. strep throat B. lyme *** C. tuberculosis D. common cold 2. which statement is about the flu? A. there is no cure B. there is usually a fever *** C. It typically lasts 3-7 days D. it spread by contact with infected people or ...
March 11, 2015 by Anonymous

Math
Find all solutions to the equation sqrt(2-3x)= 9. Express your answer as a common fraction. I squared both sides and I got 4-9z^2=81 and then -9z^2=77 then I divided both sides by -9 and now I am stuck, I know I can square root both sides. But I think something went wrong.
December 3, 2014 by Mark

Math
The smallest real number in the solution set of 2x > 6 is 4. A) True B) False - The smallest real number in the solution set of 2x > 6 is 3. C) False - The smallest real number in the solution set of 2x > 6 is a number greater than 3. For example, 3.01 is a real ...
October 4, 2011 by Michelle

Math
The smallest real number in the solution set of 2x > 6 is 4. A) True B) False - The smallest real number in the solution set of 2x > 6 is 3. C) False - The smallest real number in the solution set of 2x > 6 is a number greater than 3. For example, 3.01 is a real ...
October 4, 2011 by Mary

why will no one answer? chem
The decomposition of hydrogen peroxide in solution and in the presence of iodide ion was studied in laboratory, and the following mechanism proposed based on the experimental data. H2O2 + I - = H2O + IO - (slow) H2O2 + IO - = H2O + O2 + I - (fast) Which one of the following ...
February 27, 2012 by john117

Math
A company manufactures fence sections for residential use. The number, s, of sections that can be produced per day is related to the number of hours, h, of labour required by the function s=2.1 square root h (Show your work) a) State the domain and range for the function. (2 ...
October 8, 2014 by Alex

Math
A rectangular box is 4cm wide, 4cm tall, and 10cm long. What is the diameter of the smallest circular opening through which the box will fit? Round to the nearest tenth of a centimeter. Is it 4 squared plus 4 squared which equals 32 then take the square root of 32 and get 5.65...
February 23, 2016 by KIM

Algebra
Solve the system of equations and check your solution. x^2+y^2=25 x+2y=10 I tried but I got only the 2 x values 8 plus or minus the square root of 164 all over 2. I know the answer is wrong but I can't find my mistake. Can you show me step-by-step how to solve this system of ...
April 6, 2016 by Anonymous

Math
Vanessa presented a report on Japanese tea rooms to her class. The floors are usually covered with square and rectangular tatami mats. She drew one way to cover square floor with a square half tatami mat qnd four rectangular full mats. The area if the half mat is 8100cm (...
September 11, 2011 by Bella S

Math
A rectangular flowerpot is 20 inches long 8 inches wide and 6 inches high. true or false if andy fills the flowerpot 2/3 fullof potting soil the expression 2/3(20 + 8 + 6) could be used to find the amount of potting soil he needed
December 5, 2010 by Lisa

physics
A hydrogen atom in an excited state emits a Balmer beta photon followed by a Lyman alpha photon. The electron decayed from the third excited state to the first excited state to the ground state. True or False.
February 13, 2014 by Rashida

Chemistry
I am in an AP high school course and the teacher pulled a fast one on us by asking us what happens to K in an reversible equilibrium equation if the equation is flipped. K equations I am talking about go K=(Products)/(Reactants). The options were they take the square root of K...
April 9, 2008 by Molly

Pre-Calc
1.) Suppose that y varies directly as x. If y is 5 when x is 30, the constant of variation is 150. True Or False 2.) If w varies directly as z and w = 9 when z = -6, find w when z = 3. 3.) If y varies directly as x and y = 2 when x = 4, find x when y = 4.
October 2, 2014 by Anna

economics
which ones are true or false? property rights include the right to buy or sell one's resources and goods All countries are equally effective at enforcing property rights Property can be tangible or intangible The enforcement of property rights prevents many mutually beneficial...
October 9, 2014 by joshkuss

Algebra Sq Rt
I have a sq rt sign with a 3 on the left side. That means I'm looking for the cube of the number inside the square root? That number is 189xto the 8th power. So I multiply 189x 8 times before I find the cube or do I find the cube of 189?
February 2, 2008 by Micah

Algebra II repost, pls help
What two numbers are represented by each of the following? -6+/- sqrt 6 -6 plus or minus square root 6 not sure how to type the question. I think the answers are -6 + sqrt 6 -6 - sqrt 6 I'm just not sure what the question is actually asking for. Could someone please help me. ...
May 20, 2011 by Jet

algebra
true or false?The surface area of an open rectangular box is the same as the surface area of a closed rectangular box.
May 26, 2011 by ashly

Precalculus
Find the limit by direct substitution. A. lim x-> 5 square root cubed of x^2 -2x - 23. I replaced all of the x's with 5 and got -2. B. lim x-> -2 (4x^2 - 7x) / (6x + 10). I replaced all of the x's with -2 and got -15. Go to picturetrail and type in rowdy33. It's problems...
May 4, 2010 by Randy

Math
Out of a group of (50,000) births, the number of people, f(x), surviving to age (x) is modeled by the function f(x)=5000 square root 100-x. To what age will (20,000) people in the group survive?
January 5, 2011 by Marie

Chemistry
An electron is excited from the n=1 ground state to the n=3 state in a hydrogen atom. Which of the following statements are true? Correct the false statements to make them true. A. It takes more energy to ionize (completely remove) the electron from n=3 than from the ground ...
December 1, 2014 by Anonymous

Math
A quiz contains three True/False questions. If a student attempts to answer the questions by guessing, what is the probability that the student will answer all three questions correctly ?
April 25, 2016 by Lauren

Math- Help!!
A local tennis pro-shop strings tennis rackets at the tension (pounds per square inch) requested by the customer. Recently a customer made a claim that the pro-shop consistently strings rackets at lower tensions, on average, than requested. To support this claim, the customer ...
December 12, 2009 by Cyndi

Maths
Dear Friends, Please help on this problem :- Cindy draws 3 Squares with different sizes. The sides of Square B is 3/5 the total sides of Square A and C. The sides of Square C is 1/7 of the total sides of Square A and B. if the area of Square A is 144sqcm, what is the total ...
October 6, 2014 by J.Sarah

Algebra 2
Orlando is making a design for a logo. He begins with a square measuring 20 inches on each side. The second square has a side length of 16 inches, and the third square has a side length of 12.8 inches. Which square will be the first square with a side length of less than 8 ...
May 20, 2015 by Kuaersh

Algebra Grade 7
the ratio of square H's length to square I's length is 3 : 5, if the length of square H is 18 meters, what is the perimeter of square I?
October 9, 2012 by randomchik

Math
For what value of k does the equation x2 + k = kx 8 have: Two distinct real roots One real root No real root
September 1, 2012 by Trevor

space
Imagine that all gravity in the Universe was magically turned off (except the gravity of the Earth),and everything stopped moving.Earth's gravity will now begin to pull everything in the Universe slowly toward it. True or False?
December 1, 2008 by eduy

math
A vehicle leaves a skid mark of 40 ft before stopping. What has the approximate speed of the vehicle before it stopped? (the formula is speed=.7 times length, then find the square root times 5.5) Is is 25-35 mph?
October 26, 2010 by Summer

Maths (Linear and Quadratic Equations)
I need to solve a pair of equations where one is linear and the other is quadratic. 2x2 + 3xy + y2 = 0 3x + y = 2 last 2 in 2x2 is square root two, same after y2. help please!!!!!!!!!!!!!!!
November 21, 2012 by Saud

calculus
is this correct? use the integral test to determine if this series is convergent or divergent: the series from n=2 to infinity of 1/(n*square root of (ln(n))) I said it was divergent because the integral went to infinity
March 16, 2008 by john

physics
A rock is tossed straight up with a velocity of 37.1 m/s. When it returns, it falls into a hole 18.8 m deep. What is the rock's velocity as it hits the bottom of the hole? Responses The gain in kinetic energy equals the loss of potential energy. (1/2) M (V2^ - V1^2) = M g *(18...
October 8, 2008 by Vishnu

math
how is the sixth root of 356 related to the eleventh root of 356?
June 1, 2010 by Anonymous

maths
if squre root 196/xmultiply by squre root of 90/x=4.find x
July 8, 2015 by devang sharma

Math
If 0<theta<90 and tan theta= (square root 3)/2, find cos theta? tan(t) =3 /2; cos(t) = 1/(1+(tant)^2)= 1/(1+3/4) = 2/7 right or wrong?
October 3, 2008 by House

PSYCH
1 Which of the following is NOT one of the three fundamental features of science? a empirical questions b public knowledge c mathematical equations (My Answer) d systematic empiricism 2 A set of beliefs can be said to be pseudoscientific if it lacks one or more of the three ...
February 27, 2015 by Check My Answers for me please

math situation
please help multiply (-4n)square 2(2n square 2)square 2
March 31, 2012 by Sandra M

Psychology
1 Which of the following is NOT one of the three fundamental features of science? a empirical questions b public knowledge c mathematical equations (My Answer) d systematic empiricism 2 A set of beliefs can be said to be pseudoscientific if it lacks one or more of the three ...
February 27, 2015 by Jordan Please Help Check My Answers

Math
When factoring a trinomial that is in the format Ax^2 + Bx + C, the number that is represented by B should be viewed as the _____? a. product of two numbers b. the sum of two numbers c. square root of two numbers d. remainder of two numbers I believe it would be B
October 7, 2008 by Jackie

Calculus
Find the dervatives: 1. f(x)=(3x+1)e^x^2 2. y = e^(sin x) ln(x) 3. f(x)=(x^(2)+x)^23 4. f(x)=sin(2x)/cosx 5. square root of x/(3x+1) 6. f(x)=sin^4(3x=1)-sin(3x+1) 7. x+y=cos(xy) The answers I got: 1. 6x^(2)e^(x^2)+2xe^(x^2)+3e^(x^2) 2. e^sinx/x + -lnxe^(sinx)cosx 3. 46x+23(x^2...
October 15, 2012 by Anonymous

math
a house has two rooms of equal area. one room is square and the other room a rectangle, four feet narrower and 5ft longer than the square one. find the area of each room? let x = dimensions of the square. Rectangle then is x-4 and x+5 Set areas equal. area of square is x2 area...
November 29, 2006 by mary-beth

Math
1)Find cos theta if sin theta=3/5 and 90 degrees<theta<180 degrees. A)4/5 B)-4/5 C)square root of 34/5 D)-square root of 34/5 I chose A 2)Simplify:1-csc^2theta/cot^2theta A)-1 B)1 C)tan^2theta D)1/sin^4theta I chose C 3)Simplify:-5(cot^2theta-csc^2theta) A)5 B)-5 C)-5csc...
February 13, 2008 by Jon

Conclusions
You expect to get forty miles to the gallon in that? Why, that old wreck has a monster V8; besides, it's fifty years old and needs an overhaul. I state possibly true or possibly false due the gasoline that was made then vs. now. Also, cars or trucks in this century gets 29 ...
August 13, 2008 by Worship

Math
Choose the most specific term that will make the following statement true. Do not assume anything more than the information given. I am a ____ because my opposite sides are congruent and parallel. square rectangle parallelogram rhombus
April 13, 2014 by lina

8th Grade Algebra
Find each product. { this means the square root sign. 1. (3+2{20)(5+3{45) 2. The length and width of the rectangle are x-5 and 2x-6 a. Write a trinomial that represents that area of the rectangle. b. What is the smallest integer value of x that will give positive values for ...
January 19, 2009 by Joy

chemistry
What pb2+ concentration should be maintained in PbNO3 to produce a solubility of 1.710−4 PbI2/L when PbI2 is added? I found the ksp of PbI2 to be 7.1*10(-9), divided the ksp by the solubility, and took the square root, resulting in 6.5*10(-3). my answer is wrong :s ...
October 17, 2011 by Anonymous

Physics
A person is initially 8 m from a point sound source which emits energy uniformly in all direction at a constant rate. If the intensity of the source is to be halved but the sound is to be as loud as before, what distance should the person be from the source? Ans: 4 square root...
June 5, 2014 by Ariana

Physics
8. A 4.70 m long pole is balanced vertically on its tip. What will be the speed (in meters/second) of the tip of the pole just before it hits the ground? (Assume the lower end of the pole does not slip.) I did V^2=0^2+2(9.8)(4.70) and was wrong. I did remember to square root ...
April 15, 2015 by Victoria

Physics
8. A 4.70 m long pole is balanced vertically on its tip. What will be the speed (in meters/second) of the tip of the pole just before it hits the ground? (Assume the lower end of the pole does not slip.) I did V^2=0^2+2(9.8)(4.70) and was wrong. I did remember to square root ...
April 15, 2015 by Victoria

maths
how do i solve this equation? 21(X-(1/7))^2= 3/7 thx Divide both sides by 21 Take the square root of both sides. Rewrite it as x - (1/7)= sqrt [(1/21)*(3/7)] = sqrt[(1/7)*(1/3)(1/7)] = (1/7) sqrt(1/3) x = (1/7)[1 + sqrt(1/3)] tahnks x=(2)/(7),0
July 12, 2007 by Emma

algebra
Diagonal brace. The width of a rectangular gate is 2 meters (m) larger than its height. The diagonal brace measures square root of 6. Find the width and height.
August 24, 2010 by Simone

Trigonometry
Write the trigonometric expression as an algebraic expression. 1.) SIN(ARCSIN X+ARCCOS X) ANSWER: 1 2.) SIN(ARCTAN 2X-ARCCOS X) ANSWER: 2x-SquareRoot of 1-x/Square Root of 4x+1.
February 21, 2013 by AwesomeGuy

math 213
Tell whether each of the following is true for all sets A, B If false, give a counterexample. a. A-B= A-0 (with slashed O) b. AUB (with line over AUB) = AUB (with line over A and a line over B)
August 18, 2012 by susan

BIOCHEMISTRY
Mark each statment that is true or false and give reasons. you will get credit only if your reasoning is correct a) at a steady state of an enzyme catalyzed reaction, there is not net change in [S] or [P] b) the linear anomer of beta-glucose is the more reactive form c) ...
January 25, 2013 by UCI KID

Math
The least squares regression line is a unique line for each data set. True The least squares regression line minimizes the sum of the residuals. False
September 19, 2013 by Student

Trig.
sec^2xcotx-cotx=tanx (1/cos)^2 times (1/tan)-(1/tan)=tan (1/cos^2) times (-2/tan)=tan (-2/cos^2tan)times tan=tan(tan) sq. root of (-2/cos^2)= sq. root of (tan^2) sq. root of (2i)/cos=tan I'm not sure if I did this right. If I didn't, can you show me the correct steps? Thanks, ...
January 9, 2010 by Trig

Algebra
what is a perfect square number i know 9, 25 and 100, but what else if you multiply a perfect square by a perfect square, is the answer always a perfect square
October 10, 2007 by Cyleste

Algebra
Find the period of a pendulum that is 3 meters long if the period, T, of a pendulum in seconds can be found using the formula T = 2pi(square root L/9.8 find it for 2.5 meters as well. Would love to see the work, not just the answer. thank you.
October 27, 2009 by Cassie

Algebra 2 @ Steve
I have another question regarding functions, but instead if you are adding up functions that are in a radical. f(x) and g(x) are both square root of x+5. To find the domain of f+g, f-g, fg, and f/g, would I find the domain of each function...[-5,infinity)? And then what? How ...
November 2, 2013 by Serena

Geometry
An ant starts at a foot of a staircase and crawls to the base of the fourth step. If each step is 8 inches tall and 10 inches wide, how far is the ant from where it began? The answer is 6(square root of 41) or 38.4. I have no clue in how to get to that answer.
April 16, 2015 by Zunie

English/Argument
Statement: Five prominent Democratic senators support a new farm bill. Assuming the above statement is true, what conclusions can you draw? From the list below, circle the conclusions that MUST be true, cross out the conclusions that CANNOT be true. If the conclusion can be ...
October 22, 2011 by Sun29nc

geometry
I am having a hard time determining what formula I need to solve the following: On a hexagonal window the height is 1.3m. Find the width.Do I use the pythagreom theorem (but I have only one known number) or do I use the formula 6(1/2as)? I'm confused. The book says the answer ...
August 19, 2010 by Cendrillion

Algebra
if you are looking at the horizon, you can determine the distance you are from the horizon in miles D from a height h in feet by the equation of D = 1.2 square root h if you are standing on a mountain top that is 12000 feet in elevation how far are you from the horizon. solve ...
August 27, 2013 by Rasmussen

maths (it's urgent)
the path of the rocket is represented by the equation y= root under(25-x)^2. the path of a missile designed to intrersect the path of the rocket is represented by the equation x = 3/2 root under (y). the value of x at the point of intersection is 3. what is the corresponding ...
November 4, 2008 by jess

Physics
A 9000 Kiogram boat floats in a lake. If half of the boat is submerged, which of the following is true: 1. The boat is less dense than the water in the lake. 2. The buoyant force is less than half the weight of the boat. 3. The buoyant force is greater than the total weight of...
February 18, 2012 by GRISSELL

math
how do i find the domain and range of equations? example: f(x)=ab.solute value of x-3. f(x)=square root 36-x^2 g(x)=-2x+2. do i find the range by pluggin in y for the x and then solving. for example: x=-2y+2, and then i get y=x-2/-2. and then is that how i find the range...
December 16, 2008 by Jamie Lynn

American Gov
Under Article V of the U.S. Constitution there are two ways to propose an amendment to the Constitution: by a two-thirds (2/3) vote of both houses of Congress, or by a national convention called by Congress at the request of two-thirds (2/3) of the state legislatures. True or ...
September 23, 2011 by Jason

math help plzzzz!!!!
Multiple Choice 1. What is 0.32 written as a fraction in simplest form? (1 point) thirty-two over one hundred eight over twenty-five one hundred over thirty-two sixteen over twenty-five 2. If Frans fudge recipe calls for two and one-half cups of sugar and she increases it by ...
October 30, 2013 by josh

math-geometry
The length of the hypotenuse of a right triangle equals the length of one of the legs of the triangle. a.) Always true b.) Sometimes true c.) Never true I for A for the answer is that correct?
April 16, 2010 by nicole

maths
what must the value(s) of k be so that 2xsq +(k-3)x+k-5=0 has one real root ? Two real roots? no real root?
January 7, 2016 by jawa

math
The length of the hypotenuse of a right triangle is 2 times the length of one of the legs of the triangle. answer choice: a.Always true b. sometimes true c. never true
April 16, 2010 by nicole

microeconomics
If the technology for producign a good improves and at the same time,the price of a substitute good falls, then the quantity bought and sold of the first good will increase. True, False, or Uncertain. Explain. Take a shot. Hint: draw existing supply and demand curves. Then ...
February 8, 2007 by Brittany

trig
Am I right on this? 2sec^2(2x)-8=0 2sec^2(2x)=8 divide by 2 sec^2(2x)=4 find square root sec(2x)=2 Now, would this simply be asking me to find where secant is equal to one? Or is there no solution because secan't (pun intended) be equal to anything above 1?
March 23, 2008 by Alex

math
1. 13cm=5.12in? 2. is "root21" between? 4 and 5? 3. find the square root of 25? =5? 4. John's height increased from 5'2" to 5'7" during the past year. What is the rate of increase (to the nearest whole percent) of John's height over the past year? 8%?
October 20, 2009 by Hannah

math URGENT
okay i need to find the domain and range of this z(x) = x^2 - 100 (everything is in the square root) so i think i found the domain i got [-10,10] but i dont know about the range i solved for x and got stuck here x=y^2 + 100 helppp pleaseee :)
October 29, 2009 by lyne

MaTH!!!
Let P(x,y) be a point on the curve y=16-x^2 and let A be the point directly below P on the x axis. If O is the origin, find the area and the perimeter of triangle OAP as functions of x. I got Area=x(8-1/2x^2). Is that right? And perimeter= x+16-x^2+ (square root 256-30x^2) Did...
March 9, 2012 by L.Bianchessi

Geometry
Jonathan is 3 ft from a lamppost that is 12 ft high. The lamppost and it's shadow form the legs of a right triangle. Jonathan is 6 ft tall and Is standing parallel to the lamppost. How long is Jonathan's shadow? I don't get how the answer is square root 180, Ryan?
January 11, 2012 by Anonymous

8th Grade Algebra: Radicals
Find each product. { this means the square root sign. 1. (3+2{20)(5+3{45) 2. The length and width of the rectangle are x-5 and 2x-6 a. Write a trinomial that represents that area of the rectangle. b. What is the smallest integer value of x that will give positive values for ...
January 19, 2009 by Joy

PRE-CALC
A number is selected at random from the set {2, 3, 4, ,10}. Which event, by definition, covers the entire sample space of this experiment? A) The number is greater than 2. B) The number is not divisible by 5. C) The number is even or less than 12. D) The number is neither ...
March 18, 2014 by Shawna

Math
Round the larger factor to the graetest place. 55*4 round 50 *4 993*6 rounds to 1,000*6 735*3 rounds to 700*3 1,914*3 rounds to 2,000*3 4,722*6 rounds to 5,000 495*3 rounds to 500*3 Please ,, My answers : true or false
December 1, 2014 by Nn

American History
1. In the 1920s the NAACP stuggles for equal justice for balck american by A. holding militant demonstrations B. Securing congressional action C. Forging stronger tires with the Republican Party D. Filling lawsuits in the courts -------------------------my answer b?? Because ...
April 22, 2008 by CM

Geometry - Conditional Statements/Proof
Rewire each statement as two if-then statements that are converses of each other. 18. Two angles are supplementary if and only if the sum of their measures is 180. 20. (x-4)(x+6) = 0 if and only if x = 4 or x = -6 22. Theorem 2-5 may also be worded in this way: "If alternate ...
October 8, 2009 by James

statistics
The p value is the: a. probability with which a test statistic would occur if the research hypothesis were true. b. probability with which a test statistic would occur if the null hypothesis were true. c. cutoff probability at which a test statistic is considered extreme. d. ...
October 20, 2014 by stacy

Calculus
Hello Everyone, I need help with Calc II. 1. Integral from 0 to 1 of (sin(3*pi*t))dt For this one, I got -1/3pi cos (9 pi^2) + 1/3pi 2. indefinite integral of sinxcos(cosx)dx I got sin(cosx) + C 3. Indefinite integral of x over (root (1-x^4))dx I don't know how to solve this. ...
January 22, 2007 by Shelley

language could you please check my work
true(t) or false (f) 1)f reading is not a real hobby 2)f an activity that is done outdoors is not a hobby 3)t photography is a popular hobby 4)t building a cabnint can be part of a hobby 5)f cooking is never considered recreation 6)t model building is very educational 7)f ...
April 14, 2010 by marina

Chemistry
so i had to calculate the pH of a 100ml solution of .10M acetic acid (ka=1.8x10(-5) I came out to 2.87. But then, they want the pH if 50ml HCL is added. So i thought...Ka = x2/.15M, therefore the square root of .15M x 1.8x10(-5) = .00164(concentration). So -log(.00164) = 2.78...
October 20, 2011 by Kevin

physics
can someone explain the answers to the question: Consider the following set of equations, where s, s0 and r have units of length, t has units of time, v has units of velocity, g and a have units of acceleration. Take k to be dimensionless.Identify if these are dimensionally ...
September 3, 2012 by Anonymous

AP Chemistry
For the reduction of Cu2+by Zn, ∆G◦=−212 kJ/mol and E◦= +1.10 V. If the coefficients in the chemical equation for this reaction are multiplied by 2, ∆G◦=−424 kJ/mol. This means E◦= +2.20 V. True or false?
September 26, 2013 by Gabriella

Math
An exam consists of six true-or-false questions. Assuming that every question is answered, in how many different ways can a student complete the exam? In how many ways may the exam be completed if a penalty is imposed for each incorrect answer, so that a student may leave some...
September 14, 2014 by Anonymous

Math
If two sides of a triangle are proportional to the corresponding sides of another triangle, then the triangles are similar. Is this Always True, Sometimes True, or Never True?
October 12, 2009 by Chris

calculus
Please help with this. I submitted it below but no one responded. I need the first derivative of f(x)=4(x+ then the square root to include (x(8-x)), then close bracket.And then the second derivative of this to show by the second derivative test that it is a local maximum. This...
March 1, 2011 by Frank

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