Questions Asked on
February 13, 2015

math
Peta attempted to solve the following equation. Explain Peta's error. x (x  5) = 20 x = 20 and x  5 = 20 x = 20 and x = 25

Physics
Emmy kicks a soccer ball up at an angle of 45° over a level field. She watches the ball\'s trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. Assume that air resistance is negligable, and plot the

kayli
Thermal energy is caused by the motion of

Physics
It takes 133 J of work to move 3 C of charge from the negative plate to the positive plate of a parallel plate capacitor. What voltage difference exists between the plates? Answer in units of V.

English
Parenthetical expressions include information that may be helpful but are not essential to the meaning of a sentence. They are deemphasized by ________. A. dashes B. parentheses C. commas D. brackets I'm not really understanding this question. It has to

Probability
You roll two fivesided dice. The sides of each die are numbered from 1 to 5. The dice are “fair" (all sides are equally likely), and the two die rolls are independent. Part (a): Event A is “the total is 10" (i.e., the sum of the results of the two die

Physics
A speedboat moves on a lake with initial velocity vector v1,x = 8.57 m/s and v1,y = 2.61 m/s, then accelerates for 6.67 seconds at an average acceleration of aav,x = 0.105 m/s2 and aav,y = 0.101 m/s2. What are the components of the speedboat\'s final

physics
How fast do you need to swing a 180g ball at the end of a string in a horizontal circle of 0.6m radius so that the string makes a 35∘ angle relative to the horizontal?

Physics
A chandelier with mass m is attached to the ceiling of a large concert hall by two cables. Because the ceiling is covered with intricate architectural decorations (not indicated in the figure, which uses a humbler depiction), the workers who hung the

Probability
Before leaving for work, Victor checks the weather report in order to decide whether to carry an umbrella. On any given day, with probability 0.2 the forecast is “rain" and with probability 0.8 the forecast is “no rain". If the forecast is “rain",

math
how do I translate this sentence into an equation. 51 is the product of Malik's height and 3 . Use the variable m to represent Malik's height

Probability
Oscar has lost his dog in either forest A (with probability 0.4) or in forest B (with probability 0.6). If the dog is in forest A and Oscar spends a day searching for it in forest A, the conditional probability that he will find the dog that day is 0.25.

English
1. To avoid using unnecessary colons, use the colon only after a/an ________. A. coordinating conjunction B. series of items C. main clause D. introduction 2. A(n) ________ introduction establishes your authority on the topic and sets the stage for the

Physics
The top of the pool table is 0.770 m from the floor. The placement of the tape is such that 0 m is aligned with the edge of the table (as shown). The winner of the competition wants to know if he has broken the world record for the break shot of 32 mph

Physics
While rearranging a dorm room, a student does 312 J of work in moving a desk 2.0 m. What was the magnitude of the applied horizontal force?

pre calculus
In how many ways can a family of six be seated at a round table if the mother and father must sit together?

Science
What is the primary reason for the trend in atomic radius going from left to right across the periodic table? 1.All atoms in a given period of the table are the same size because the same main energy level is being filled. 2.There is no clear trend, the

Science
The Body's Transport System 1) Which of the following is not a function of the circulatory system? :Breaks down large molecules*** :Delivers oxygen to body cells :Takes carbon dioxide away from body cells :Fights infection 2) Which of the following

Physics
The potential difference between a storm cloud and the ground is 2.13 Ã— 108 V. If a bolt carrying 2 C falls from a cloud to Earth, what is the magnitude of the change of potential energy of the charge? Answer in units of J.

History
1. In 1840 the population of chicago was only 4,470. by 1990 the city's population was 1, 698,575 which factor best explains the population change A the constructuion of railroads connecting northeastern cities and Midwestern farms B the reduction in

physics
Stone dropped from top of a tower 100m high. At same instant another stone is thrown vertically from base of the tower with a velocity of 25m/s. When and where will the two stones meet? Given g =10 m/s^2

accounting
The following was taken from the records of Smith Company in the year ending December 31, 2014. Journalize the following transactions in an Excel spreadsheet for yearend 2014 using the aging method. Assume that the allowance for doubtful accounts has a

Math Check
I need someone to please check this for me. Thanks! :) Question: Tonto Pagalies (brother to vaporized racer Teento), an observer at Bindy Bend, is 14285’ from Desert Plain. He knows that there is a right angle between the lines of sight from Bindy Bend

Constitutional Law
Which of the following is protected speech under the First Amendment? A. Offensive speech B. Fighting words C. Child !@#$%^&ography D. False commercial advertising

Calculus
The integral of sin(7x)cos(7x)dx

GEOMETRY
Find the exact length of the altitude drawn to the hypotenuse. Do not round. The triangle is not drawn to scale. A triangle with base measures of 9 & 17. Draw a diagram. Using similar triangles, we know that h/9 = 17/ã370 I need more help with this.

LA
which of the following best relates to these details in "winter"? frogs burrow the mud/ snails bury themselves

Chemistry
1.How much energy is emitted by 1 mol of sodium ions emitting light at this wavelength? Answer in units of kJ. This is what I did for this problem, but my answer is wrong 45.8 mg = 0.0458 g 0.0458 g / (23.0 g/mol) = 0.001991 mol Na 0.001991 mol x (6.02214

English
1. An example of a prediction conclusion is ________. A .suggesting what the audience might do after they read your paper B. picking up an idea or image suggested in the introduction and echoing it in the conclusion C. a logical extension of the

Calculus
1. is the derivative of the function f(x)=5e^(4x9z) f'(x)= 25e^(4x9z)? 2. Is the derivative of the function f(x)=e^(2x)e^(2x) f'(x)=2e^(2x)+2e^(2x)? 3. If f(x)=e^x^1, would f'(2)=1/4e^(1/4)?

english
I am writing an essay on living on a farm vs living in the city my thesis statement needs help any suggestions? The factors that a person should consider before choosing between the two are environments, lifestyle, and family values.

statistics
Listed below are the duration's (in hours) of a simple random sample of all flights of a space shuttle program. Find the range, variance, and standard deviation for the sample data. Is the lowest duration time unusual? Why or why not? 71, 100, 237, 199,

Biochemistry
Suppose that a mutant enzyme binds a substrate 100 times as tightly as does the native enzyme. What is the effect of this mutation on catalytic rate if the binding of the transition state is unaffected?

math
A gardener is making a triangular planting, with 35 plants in the front row, 31 in the second row, 27 in the third row and so on. If the pattern is consistent how many plant are there be in the last row?

intro to computers
Your company has 1,500 desktop computers running Windows 7. You want to upgrade them to Windows 8. Which type of Microsoft license would be bestsuited in this situation?

Science
1.The Bohr model of the hydrogen atom is best described as: 1. A large lump of chocolate chip cookie dough with electrons as the chocolate chips; those of higher energy are on the outside surface of the lump 2. Similar to Saturn with electrons of varying

vocab
i don't know none of this . PLEASE HELP!!! words: attest, attribute, discern, dispatch, enhance, enigma, exemplify, mobile, nocturnal, orient. Sentence check 2 for chapter 8 on improving vocabulary skills fourth edition

Physics
Calculate the flow rate of blood (of density 1.03 g/cm3) in an aorta with a crosssectional area of 2.88 cm2 if the flow speed is 28.5 cm/s. Answer in units of g/s.

statistics
Below are 36 sorted ages of an acting award winner. Find P10 converting a percentile to a data value 17 21 22 22 22 23 24 30 31 33 37 38 38 42 43 44 45 47 47 50 51 53 54 54 54 54 55 60 64 65 67 69 71 71 72 76 78 I am not sure how this system works and I

Calculus
Integration with substitution The integral of f'(g(5x))g'(5x)dx

Physics
Bob has just finished climbing a sheer cliff above a beach, and wants to figure out how high he climbed. All he has to use, however, is a baseball, a stopwatch, and a friend on the ground below with a long measuring tape. Bob is a pitcher, and knows that

Health
The skeletal system is created to ____________ internal organs. (1 point) a.protect**** b.maintain c.support d.hide 2. Your elbow and knee are examples of (1 point) a.ligaments. b.joints.**** c.cartilage. d.angles

Constitutional Law
According to the readings, which of the following provisions has NOT been formally applied to the states? A. Fifth Amendment right to a grand jury indictment in felony cases B. First Amendment right to peaceably assemble C. Fifth Amendment right against

Calculus help and please check answer for a)
The decay of a certain substance is modeled by the function N(t)=100(3+e^(t/3), where the number of particles is represented by N in a time of t hours. a) what is the initial number of particles?  I set t as 0 and got an answer of 400 particles initially

Physics Honors
A 47.0 g golf ball is driven from the tee with an initial speed of 48.0 m/s and rises to a height of 23.2 m. (a) Neglect air resistance and determine the kinetic energy of the ball at its highest point. (b) What is its speed when it is 8.0 m below its

physics
Three charged marbles are glued to a nonconducting surface and are placed in the diagram as shown. The charges of each marble are q1 = 5.75 µC, q2 = 1.48 µC, and q3 = −2.47 µC. Marble q1 is a distance r1 = 3.00 cm to the left of the marble q2, while

core values
I need some example of personal core values?

main ideas
I REALLY NEED HELP WITH THIS!!! Mastery test 3 Mastery test 5 ten steps to improving college reading skills sixth edition by John Langa

ENGLISH
I have two questions i need help on. Im pretty bad with colons and semicolons :/ 1. When two main clauses are joined together without the use of a coordinating conjunction, the clauses should be separated by a ____. A. semicolon B. comma C. colon D.

Chemistry
75.0 mL of a 1.20 M solution is diluted to a total volume of 248 mL. A 124mL portion of that solution is diluted by adding 111 mL of water. What is the final concentration? Assume the volumes are additive.

Physics
What is the final equilibrium temperature when 5 g of milk at 13â—¦C is added to 161 g of coffee at 81â—¦C? Assume the specific heats of milk and coffee are the same as that of water, and neglect the specific heat of the container. Answer in units

maths
If the third and sixth terms of a geometric progression are 12 and 96, then find the number of terms in the progression, which are less than 2000.

physics
what will be the young's modulus of copper wire pf length 0.15 m and radius 0.2 cm

chemistry
the gases contain 10^22 and 10^23 molecules present in different vessels at the same temperature. the ratio of their average K.E is the correct answer is 1:1 i think please give explanation

Earth Science
11. Which earthquake scale takes into consideration the damage caused by an earthquake? A. Amplitude scale B. Moment magnitude scale C. Richter scale D. Modified Mercalli scale D?

Geometry
Quadrilateral GHIJ is a scale drawing of quadrilateral ABCD with a scale factor r. Describe the following statements as always true, sometimes true, or never true, and justify your answer. a. AB/GH = BC/HI b. perimeter (GHIJ) = r * perimeter (ABCD) c. Area

Constitutional Law
If a professor at a public school imposes a policy barring students from wearing all types of hats in the classroom, this would most appropriately be labeled as a: A. regulation of protected speech. B. ban on protected speech. C. contentbased limitation

math calculus
what is the difference between the function 2^x and (1/2)^x?

Science
What hormone is the adrenal medulla responsible for secreting?

Science
Endocrine glands ________. A. Do not have ducts to carry their product to a surface B. Do not have ducts to retain their product below surface C. Have ducts that carry their secretory product to a surface D. Have ducts to retain their secretory product

Physics Honors
A basketball player makes a jump shot. The 0.600kg ball is released at a height of 1.90 m above the floor with a speed of 7.40 m/s. The ball goes through the net 3.10 m above the floor at a speed of 4.40 m/s. What is the work done on the ball by air

a sond wave is prouduced. 3seconds later its echo
a sound wave is prouduced. 3seconds later its echo was heard.what is the distance between the reflecting surface and source. Try the suggestions below or type a new query above.

Physics
How does the energy stored in a capacitor change if (a) the potential difference is doubled, and (b) the charge on each plate is doubled, as the capacitor remains connected to a battery?

Constitutional Law
Currently, how many amendments have been added to the Constitution? A. 19 B. 26 C. 27 D. 32 is it C

Math
Find all solutions for the following complex number: z^4 /4=1

Business
Explain, in several paragraphs (but no more than four), the implications of the Malcolm Gladwell article "How David Beats Goliath." Apply some aspects of the article to your experience and future.

alg 1
the perimeter of a rectangle is 24 m. the width is 30 m less than five times the length. find the dimentions of the rectangle.

math
The annual interest rate for a customer’s loan of $425 is 15.75%. What is the total dollar amount to be repaid on the loan, including principle and interest, for the entire year?

math
on a test of 50 question jill answered 47 correctly.how many percent did she answered correctly

FIN
A project has the following initial outlay of 11,500 resulting in a single cash flow if 23,876 in 7 years. What is the internal rate of return?

Constitutional Law
What constitutional provision has been used to make most of the provisions within the Bill of Rights applicable to the states? A. Fourteenth Amendment Due Process Clause B. Fourteenth Amendment Equal Protection Clause C. Fourteenth Amendment Privileges or

Calculus
How would I answer this question? Differentiate the function f(x)=sqrt(cosxsinx)

English emailing response to professor
So I emailed a professor asking the professor about taking a test earlier than the scheduled day it is on next week and the professor responded and said they could arrange for me to take the test early if I want. And to let the professor know what I have

Math 201
Determine whether each sequence is geometric, arithmetic, or neither. Justify your answer. (1/5), (1/4), (1/3), (1/2), 1...

math
sales tax rate of 5%, what is the total cost if paid 456.60/

math
what is 66 2/3 of 39?

Constitutional Law
What amendment suggests that there are more liberties than those specifically enumerated in the Bill of Rights? A. Third B. Fifth C. Ninth D. Fourteenth is it C

Calculus
I am not too sure if I did this question correct. Thanks in advanced! Data table: Time after Consumption (min): 30 60 90 120 150 180 Amount of Codeine in Blood (mg): 27.0 23.5 21.2 18.7 16.6 14.5 1.) create a scatter plot of the data and determine a

Project Mangament
How would a structure project teams to improve communications the most in an agile environment?

Anthropology
Indicate what roles kinship play in Confederacies systems

Project Managment
What are the different types of communications needed for project stakeholders? How do you determine who gets what and when?

Constitutional Law
Based on Planned Parenthood of Pennsylvania v. Casey, which of the following governmental conditions imposes an undue burden on a woman's right to choose an abortion? A. Spousal consent B. Informed consent C. Waiting period of 24 hours between consent and

physics
a regulation golf ball has a mass of 45.0 grams. a golf ball is dropped from a height of .305 m and it strikes the floor with a velocity of 2.35 m/s [down]. if the velocity of the ball as it leaves the floor is 2.15 m/s [up]. determine the impulse applied

physics
if a 400g ball moving 1.2 m/s [north], receives an impulse that changes its direction and speed to 2.8 m/s [east], what is the change of momentum?

math
The distance meters from a fixed point O, covered by a particle after t seconds given by the equation; S = t3 – 6t2 + 9t + 5. (a) Calculate the gradient to the curve at t = 0.5 seconds (b) Determine the values of sat the maximum and minimum turning

Earth Science
5. Most tornadoes carry wind speeds that range from A. 105 to 177 km per hour. B. 178 to 266 km per hour. C. 267 to 322 km per hour. D. 1 to 105 km per hour. A?

Algebra 2
It takes You, riding a motorcycle, 2 hours less time to travel 60 miles than it takes Marley to travel 50 miles riding a horse. You travel 10 miles per hour faster than Marley on a horse. Find yours and Marley’s times and rates of travel. Hint: Set up a

Art
Advanced Art Preservation 1) What advantage does multispectral analysis hold over the Xray Machine? :Multispectral analysis can analyze pigments that an Xray cannot detect :Multispectral analysis reveals what is not visible to the naked eye

pre cal 11
hi so i am stuck at this question that is asking about arithmetic sequence . Five fence posts are equally spaced between two corner posts that are 42 meter apart. how far apart are the five fence posts. i know the answer is 7m but i don't know how plus i

Geography
1.1.1define the term drainage basin 1.1.2what is the difference between drainage basin and catchment area? 1.1.3 name any two water management areas in south africa. 1:2 THE IMPONTANCE OF MANAGING DRAINAGR BASIN CATCHMENT AREAS IN SOUTH AFRICA SHOULD BE A

pre cal 11
i am stuck at a question that is asking for the common difference, first term, and general term for the arithmetic sequence the question is t10=50 and t27=152 i found my d=6 and t1=(4) so know my equation is: tn=(4)+(n1)6 i had asken my teacher to tell

math
10 ft/Min = ______ mi/h

Calculus
f'(x) if x is less than or greater than 1 Let F'(x)={ g'(x) if x>1 Where f'(x)=x/(x^22)^2 and g'(x)=3x4 A. If f(1)=3/2, find f(x) B. If F(x) is continuous at x=1, find g(x). C. Express F(x). D. If F(x) is continuous at x=1, determine if F(x) is

physics
What angle might give you the greatest height? How could you test this with a simulation that does not go off the page? What angle might give you the greatest distance? How could you test this with a simulation that does not go off the page? What angle

physics
Three people pull simultaneously on a stubborn donkey. Jack pulls eastward with a force of 67.3 N, Jill pulls with 98.7 N in the northeast direction, and Jane pulls to the southeast with 133 N. (Since the donkey is involved with such uncoordinated people,

Calculus
Let f(x)=cosxsqrt(1+sinx) A. If F(x)=the integral of f(x)dx and F(0)=5/3, find F(pi/2). B. If G(x)=the integral of f(x)sinx dx and G(0)=1/3, find G(x).

physics
In driving the usual route to school, a student computes his average speed to be 26 km/h. In a hurry to get home that afternoon, he wants to average 30 km/h for the round trip. What would his average speed for the return trip over the same route have to be

math
One of the tallest living men has a height of 263 cm. One of the tallest living women is 245 cm tall. Heights of men have a mean of 177 cm and a standard deviation of 8 cm. Heights of women have a mean of 163 cm and a standard deviation of 4 cm. Relative

biology
I need help on the following: Imagine that a motor unit, with its nerve intact, is placed in a solution that is calciumfree (but has the proper ionic strength – don’t worry how). Further imagine that the ends of the muscle fibers in the motor unit are

English
A(n) ________ introduction begins with a point that is more specific than that of your thesis. A. quotation B. contrasting idea C. broadtonarrow D. narrowtobroad

physics
Stone dropped from top of a tower 100m high. At same instant another stone is thrown vertically from base of the tower with a velocity of 25m/s. When and where will the two stones meet? Given g =10 m/s^2

English
Avoid ________ when writing an essay. A. summarizing B. using personal input C. quotations D. sermonizing D?

science
what is an electrostatic precipitator? In simple words please..

calculus min value of function
The answer is 1/2 but how? Which of the following is the minimum value of the function f(x)= sinxcosx? a) 0 b) 1/2 c) 1 d) does not exist

maths
A and B can finish a piece of work in 16 days and 12 days respectively. A started the work and worked at it for 2 days.He was then joined by B.Find the total time taken to finish the work.

Calculus
A wealthy patron of a small private college wishes to endow a chair in mathematics with a gift of G thousand dollars. Suppose the mathematician who occupies the chair is to receive $110 thousand dollars per year in salary and benefits. If money costs 8%

Chemistry
Helium was heated in a sealed container from 18°C to 36°C. The original pressure of helium was 0.84 atm. Find the new pressure assuming V and n remain the same. I put 0.84 over 18 and set it equal to x over 36. I got 1.7 atm but it says its wrong?

Science  Urgent.
What is a electrostatic lifting apparatus? Please help..

Chemistry
The equation for the best fit line was y = 4058.7x + 16.10. Using the equation of the best fit line, calculate the heat of vaporization (delta H) and the NORMAL BOILING POINT (in Celsius) of this volatile liquid. Calculated: dHvap = 33.7kJ/mol > I'm

Anthropology
Is my answer correct. In what ways did the indigenous peoples react to European Colonialism? European Colonialism fundamental decisions affecting the lives of the colonized people implemented by the colonial rulers in pursuit of interests that are often

Chemistry
Methanol > Normal BP: 64.6°C > dHvap: 35.3kJ/mol isoPropanol > Normal BP: 82.3°C > dHvap: 45.4kJ/mol Cyclohexane > Normal BP: 80.7°C > dHvap: 33.1kJ/mol Question: Ethanol has a normal BP of 78.3°C. Why is the normal BP higher than

health
If older adults are at risk of falling ,they should do exercises that maintain or improve

accounting
When a european coffee maker becomes less experience to buy in the United states you could probably say that we're experiencing a_____ dollar

Math
I am not sure how to figure out the missing lengths of a pentomino? Here are the lengths. 4cm. 3cm. 12cm and the missing one is in the middle

Algebra
translate the give fhrase into algebraic expresion 7 less than sum of 3 and x divided by 5

calculus
Two forces of 7 lb. and 14 lb. act on a body at right angles to each other. Find the angle their resultant force makes with the force of 14 lb.

algebra
Translate into algebraic exxpression one third of difference betwen 6 andp is added to 8

math
Tony is on his way home in his car. He has driven 12 miles so far, which is threefourths of the way home. What is the total length of his drive?

PreCalculus
Each second after shutoff, the speed of the blade is 2/3 of the speed in the previous second. After the first 8 s, the saw has turned 258 times. What was the speed of the saw before the motor shut off, to the nearest tenth of a turn per second? I get

math
I am a positive integer less that 30, two more than my value is a mulitple of 6 the sum of my digits is a mulitple of 7 find this number

Calculus
Let f(x)=cosxsqrt(1+sinx). A. Let F(x)=the integral of f(x)dx and F(0)=5/3, find F(pi/2). I got 3.386 with Usubstitution B. If G(x)=the integral of f(x)sinxdx and G(0)=1/3, find G(x). I got a reply to this but I did not understand the explanation. How

math
Simplify [1+y/(x+y)]/ [13y2/(x2y2)] a.x/yx b.y/xy c.xy/22x d.xy/x2y

math
Find the solution set 2x + [3x(4x5) ]=x/42 a.28/3 b.28/3 c.9 d.9

Math
What is 2.48 expressed as the quotient of two integers in simplest form?

math
The area of rectangle is 192 sq. meters its diagonal is 20 in. find its width and length?

math
If a man was x years old y years ago, how old is z years old from now? a.35 b.36 c.38 d.None

Microcomputer applications
Do you know if there is an online tutorial for the book Office 2013 Marquee by Rutosky, Sequin, Roggenkamp, Rutosky

chemistry
Upon decomposition, one sample of magnesium fluoride produced 1.66kg of magnesium and 2.56kg of fluorine. A second sample produced 1.29kg of magnesium. How much fluorine (in grams) did the second sample produce?

math
Cristy’s age 15 yrs ago equals the sum of 2/9 of her age 15 yrs hence and 1/6 of her age ago. How old is she now? a.27 b.28 c.29 d.30

chemistry
In Europe, gasoline efficiency is measured in km/L. If your car's gas mileage is 38.0mi/gal , how many liters of gasoline would you need to buy to complete a 142km trip in Europe? Use the following conversions: 1km=0.6214mi and 1gal=3.78L.

math
The length of a rectangle is increased by 50%. By what percent would the width be increased to keep the same area? a.43/3 b.45/4 c.331/3 d.311/3

Chemistry
75.0 mL of a 1.20 M solution is diluted to a total volume of 248 mL. A 124mL portion of that solution is diluted by adding 111 mL of water. What is the final concentration? Assume the volumes are additive.

chemistry
At 29.6 degrees C, pure water has a vapor pressure of 31.1 torr. A solution is prepared by adding 86.7 g of "L" a nonvolatile nonelectrolyte to 390.0 g of water. The vapor pressure of the resulting solution is 27.6 torr. Calculate the molar mass of "L"

chemistry
While in Europe, if you drive 125km per day, how much money would you spend on gas in one week if gas costs 1.10 euros per liter and your car's gas mileage is 26.0mi/gal ? Assume that 1euro=1.26dollars.