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November 23, 2014

Posts by Emily


Total # Posts: 2,354

math
I feel as though I am missing something here...Suppose a family wants to have 3 children. Find the probability that the family has at least 1 boy. Help?
March 13, 2012

Math
I have the same exact question as this. But I don't understand your way of answering. Can you please help me with this?# of faces painted 3x3x3 4x4x4 5x5x5 4 3 2 1 0
March 10, 2012

Social Studies
Did the Emperor of Qon's efforts to unite China make him an effective ruler? Is the answer very ineffective or very effectve?
March 8, 2012

Math
I forget how do you do this problem? -y < -x-2
March 7, 2012

physics
A car initially traveling eastward turns north by traveling in a circular path at uniform speed as in the figure. The length of the arc ABC is 214 m, and the car completes the turn in 40.0 s (Figure shows coordinate plane with point A on -y axis point C on +x axis and point B ...
March 6, 2012

Calculus I
Show that the equation x^4 + 4x + c = 0 has at most two real roots. I believe we're supposed to prove this by proof of contradiction using Rolle's Theorem, but I'm not quite sure how to do this problem.
March 5, 2012

algebra 2
A pebble is tossed from the top of a cliff. The pebble's height in feet is given by y(t) = -16t2 + 6t + 200, where t is the time in seconds. Its horizontal distance in feet from the base of the cliff is given by d(t) = 5t. How far will the pebble be from the base of the ...
March 5, 2012

Calculus I
Sketch the graph of f by hand and use your sketch to find the absolute and local maximum and minimum values of f. 18. f(x) = 1/x , 1 < x < 3 I can graph it just fine, but for my answer I got that the function has none of the above. Is this correct?
March 5, 2012

Algebra 2
If there are initially 1500 bacteria in a culture, and the number of bacteria double each hour, the number of bacteria after t hours can be found using the formula N=1500(2^t). How many bacteria will present after 7 hours? I think the answer is N=192,000. Is this correct?
March 1, 2012

math
i need help doing these type problems.... example 3 1/3- 2 1/2=
February 29, 2012

algebra
To solve ax = b for x multiply both sides of the equation by?
February 29, 2012

algebra
Hi would you help me homework please?
February 29, 2012

world history
Analyze the changes in global commerce between 1750 and 1900 due to changes in technology, communication, and economic theory.
February 26, 2012

math
I have 432 cards that are three and a half inches long if I put them end to end how many feet long is the line of cards
February 23, 2012

Calculus
Ahh yes that was a typo! Thank you!!
February 22, 2012

Calculus
Find the derivative of y = ln |cos(ln)|. I got -tan(ln x)/x, is this correct?
February 22, 2012

Physics
if a force of 163 newtons is applied to the end of the jack handle the end moves down 15 cm. If lifting part of the jac raises the car bumper 1.75 cm what force is the jack exerting on the bumper
February 17, 2012

College Chemistry
How much Ca(OH)2 is required to remove 90.0% of PO4^-3 from 7.5 times 10^6 L of drinking water containing 25 mg/l of PO4^-3?
February 17, 2012

Chemistry
How many milliliters of .100 M HNO3 are needed to neutralize 58.5 mL of .0100 Al(0H)3?
February 17, 2012

math
If there are 75 animals in a pet store and a pie graph shows 16% are cats how many of the animals are cats
February 14, 2012

Physics
A 80.0 N box of is pulled 20.0 m up a 30.0 Degree ramp by a force of 115 N, if the coefficient of kinetic friction between the box and the ramp is .22 what is the box's kinetic energy?
February 14, 2012

chemistry
Thanks dude
February 13, 2012

chemistry
The absorbance reading of an element is observed in an atomic absorption spectrometer. Would the readings increase, decrease or stay the same if: (please explain) Thank you a) viscosity of the solution increased or decreased? b) the solution had a lot of dust particles? c) the...
February 13, 2012

physics
A string connecting a car of mass x1 on an air track is connected to another mass, x2, by a string over a pulley. If the string has appreciable mass will the car still undergo constant acceleration? Explain I think that the car will still undergo constant acceleration, the ...
February 11, 2012

physics
A string connecting a car of a certain mass, x1, on an air track is connected to another mass, x2, by a string over a pulley. If the string has appreciable mass will the car still undergo constant acceleration? Explain. I think it will still undergo a constant acceleration, ...
February 11, 2012

physics
A string connecting a car of a certain mass, x1, on an air track is connected to another mass, x2, by a string over a pulley. If the string has appreciable mass will the car still undergo constant acceleration? Explain. I think it will still undergo a constant acceleration, ...
February 11, 2012

try this
what song is this from: Everybody seems to look at you, Its not because your different, its just because your so scay cool, the sinister style---------------, you dropped it gorgeous, dropped it gorgeous, that's where the cool kids rule!
February 10, 2012

TO WRITEACHER
i'm looking for steps to write a summary
February 9, 2012

TO WRITEACHER
it didn't help!
February 9, 2012

HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
I need help on writing a summary and an example of a summary.My teacher said that when your writing a summary,the middle is the 3 supporting details or what happens,the end is what wraps it all up or the conclusion.but what is the beginning? PLEASE, I NEED HELP, MY ASSIGNMENT ...
February 9, 2012

Chemistry
Thanks so much :)
February 9, 2012

Chemistry
Consider the following hypothetical aqueous reaction: A (aq)-->B(aq)}. A flask is charged with 0.065 (mole) of A in a total volume of 100.0 (mL}. The following data are collected: Time (min) 0 10 20 30 40 Moles of A .065 .051 .042 .035 .031 Calculate the average rate of ...
February 9, 2012

trig
Find sin t,cos t and tan t when the terminal side of an angle of t radians passes through ( -3/5 , -4/5) on the unit circle.
February 8, 2012

geometry
If triangle has vertices A(7,-3), B(-1,5), and C(4,-8), what is the length, in simplest radical form, of the median from C to AB?
February 7, 2012

Calculus
Sorry, I forgot one: w) lim (1-2cos^2x)/(cosx-sinx) as x->π/4
February 7, 2012

Calculus
uu) lim ln(1-x) as x->1- yy) lim (√(6-x)-2)/(√(3-x)-1) as x-> 2 zz) lim (1-(1/2)arctanx) as x->-∞ bbb) lim ln|1-x| as x->1 If these are hard to interpret with all the parentheses, you can plug them in to Wolfram Alpha and it interprets them ...
February 7, 2012

Physics
An open tube of length L = 1.60 m and cross-sectional area A = 4.60 cm2 is fixed to the top of a cylindrical barrel of diameter D = 1.27 m and height H = 2.16 m. The barrel and tube are filled with water (to the top of the tube). Calculate the ratio of the hydrostatic force on...
February 6, 2012

physics
A 39-kg girl standing at rest on slippery (frictionless) ice throws a 10-g ball forward with a speed of 10 m/s. Just afterward, the girl will
February 3, 2012

Physics
In a 100 m race, Maggie and Judy cross the finish line in a dead heat, both taking 10.6 s. Accelerating uniformly, Maggie took 2.20 s and Judy 2.90 s to attain maximum speed, which they maintained for the rest of the race. A) What was Maggie's acceleration? B) What was ...
February 2, 2012

physics
A 5.50 bucket of water is accelerated upward by a cord of negligible mass whose breaking strength is 77.0 . If the bucket starts from rest, what is the minimum time required to raise the bucket a vertical distance of 14.0 without breaking the cord?
February 1, 2012

Calc 3
if r= <x,y,z> and r_0= <x_0,y_0,z_0>, describe the set of all points (x,y,z) such that magnitude[r-r_0]=4
January 31, 2012

Math
when he sits on the throne
January 31, 2012

Calculus I
Reading these answers makes a whole lot more sense after a night's sleep, haha. Thank you so much!
January 30, 2012

Calculus I
We're reviewing limits from the previous chapter, but I'm still having some difficulty with some problems: lim tan(pi(x/4)) as x-> -7 lim (x^2 - x^3(cos(1/x))/3x^2 as x-> 0 I know the answer to the first problem is 1 and to the second problem it's 1/3 but I&#...
January 30, 2012

Calculus
Since f is a polynomial, it is continuous in the interval [0,1]. f(0) = 3 f(1) = 9 Therefore, for every value of k in the interval [3,9] there is a c in the interval [0,1] such that f(c)=k.
January 30, 2012

English Lit
okay-thank you-I'll try again
January 29, 2012

English Lit
I have a question about Henry II. What did he do that solidified his power as king but led to economic problems and helped incite conflict with the church. The possible answers are: Executed all Bishops who were opposed to his rule Gave enormous finiacial gifts to the nobility...
January 29, 2012

SIMILARITY
WHAT ARE THE SIMILARITIES OF A PARK AND A PLAYGROUND?
January 29, 2012

SOSO
okay! but what are the similarities
January 29, 2012

SOSO
okay. THEY ARE DIFFERENT BECAUSE A PLAYGROUND IS A PLACE WITH SLIDES,SWINGS,MONKEY BARS,AND SEE-SAW WHERE KIDS CAN PLAY.A PARK IS AN OPEN AREA WITH BENCHES AND PONDS WHERE THERE IS A LOT OF FREE ROOM TO RUN.
January 29, 2012

SOSO
what ARE the similarites and differences between parks and playgrounds!
January 29, 2012

Physics
A high diver of mass 65.0 kg steps off a board 10.0 m above the water and falls vertical to the water, starting from rest. If her downward motion is stopped 2.30 s after her feet first touch the water, what average upward force did the water exert on her? I'm not sure how ...
January 29, 2012

Physics
How do you calculate the magnitude of the uncertainty of the net force, U{F}? I was given several different equations but for some reason I'm still confused. Any help would be greatly appreciated.
January 28, 2012

Physics
How do you calculate the magnitude of the uncertainty of the net force, U{F}? I was given several different equations but for some reason I'm still confused. Any help would be greatly appreciated.
January 28, 2012

Physics
Starting from rest, a 4.0-kg body reaches a speed of 8.0 m/s in 2.0 s. What is the net force acting on the body?
January 25, 2012

Physics
Starting from rest, a 4.0-kg body reaches a speed of 8.0 m/s in 2.0 s. What is the net force acting on the body?
January 25, 2012

Physics
A hunter wishes to cross a river that is 1.6 km wide and that flows with a speed of 4.8 km/h. The hunter uses a small powerboat that moves at a maximum speed of 9.6 km/h with respect to the water. What is the minimum time necessary for crossing?
January 19, 2012

physics
a car rolls off a cliff and lands 15m from the base. if the cliff was 22m high, how fast was the car going? show work.
January 15, 2012

physics
A 20000 kg airplane takes off by traveling 300 m down a runway while the engines exert a continuous force of 4000 N.(a) Calculate the change in kinetic energy of the airplane during takeoff.(b) Determine the speed of the airplane as it leaves the runway.
January 13, 2012

HELP
okeedokey
January 12, 2012

HELP
i need a printable protractor
January 12, 2012

Science
how is it possible to figure out a science problem like this EXAMPLE:s=2m*6Hz=2m*6(1/s)=12m/s if they don't tell you what the letters mean?
January 10, 2012

Geometry
MO bisects <LMN,m<NMO=(6x+19)°,andm<LMO=(9x-14)°. Solve for x and find <LMN.
January 9, 2012

math
kano's college is 1200 miles away.he drives 300 miles each day.how long will it take him to get to college? _______________________________________ days / miles per day /miles in all _______________________________________ 5 / 300 /1500 300*5 =1500 is the number model write?
January 5, 2012

stuff
is figure skating all season
January 5, 2012

math
How many 8 by 10 inch tiles fit on a 16 by 20 ft floor ?
January 4, 2012

math
what do the numbers 8/10,0.75,0.2 and 2/5 look like in order from least t greatest?
January 3, 2012

Math
A total number of 121 people came to the school science fair this year. This number is 7 MORE than TWICE the number of people who came last year's science fair. How many people came last year?
December 20, 2011

earth
what factors contribute to the formation of fertile, deep topsoil in temperate regions?
December 18, 2011

Physics
James's tug of war team pulls with 500N of force to the right wile Jake's team pulls with 415N to the left. If James's team weighs 350 kg, how fast are they moving?
December 11, 2011

physics
A lever has a Mechanical Advantage of 13. How much force would the lever exert if you push with a 200N force?
December 11, 2011

11th grade english
I'm supposed to choose how the italicized noun clause is used. Not so sure about the different types of noun clauses.. can someone help me? & also kinda explain the difference? 1.The first thing to consider was [how to find a paying job.] S OP PN DO 2.I am optimistic ...
December 9, 2011

Physics
Two carts with masses of 4.24 kg and 3.44 kg move toward each other on a frictionless track with speeds of 4.90 m/s and 3.51 m/s respectively. The carts stick together after colliding head-on. Find the final speed.
December 8, 2011

Math
If Alice earns a monthly salary of $315 plus a comission on her total sales. Last month her total sales were $9640 and she earned a total of $1182.60. What is her comission rate?
December 8, 2011

algebra
k but how do I find that?
December 6, 2011

algebra
write an equation of the line that passes through the given point and is parallel to the given line (-1,3), y=2x+2
December 6, 2011

Government
The correct answer is the television.
December 6, 2011

Science
Stage of mitosis in which Chromosomes split apart
December 5, 2011

Physics
What is the maximum acceleration of a platform that oscillates with an amplitude of 2.1 cm at a frequency of 6.7 Hz? I feel like this is a very simple question, but I'm having trouble figuring it out.
December 5, 2011

Physics
A radio set at a sound level of 20 dB is suddenly increased to 80 dB. how many more time greater is the pressure amplitude at 80 dB? I do not know what to do please help
December 1, 2011

Calculus I
Find the exact area of the surface obtained by rotating the curve about the x-axis. y = sqrt(1+5x) from 1<x<7
December 1, 2011

Calculus I
Find the exact area of the surface obtained by rotating the curve about the x-axis. y = sqrt(1+5x) from 1<x<7
December 1, 2011

3rd Grade Math
Why is this statement wrong? The greater number of counters, the greater the number of arrays you can form.
November 30, 2011

COMPUTER HARDWARE MANAGEMENT
AMD (Advanced Micro Devices) is the second largest maker of personal computer microprocessors after Intel. They also make flash memory, integrated circuits for networking devices, and programmable logic devices. AMD reports that it has sold over 100 million x86 (Windows-...
November 29, 2011

English
c
November 29, 2011

algebra
There are 7 coins in a piggy bank. The coins are all quarters and dimes. All together the total amount of money in the bank is $1.15. How many of each coin are in the piggy bank.
November 21, 2011

Physics
Two disks are mounted (like a merry-go-round) on low-friction bearings on the same axle and can be brought together so that they couple and rotate as one unit. The first disk, with rotational inertia 2.58 kg·m2 about its central axis, is set spinning counterclockwise (...
November 18, 2011

Social Studies
During Rutherford B. Hayes's presidential run, what's was bad or good about it?
November 16, 2011

MATH
no, why?
November 16, 2011

MATH
i need this as quick as possible please Omar is building a straight fence, with posts one meter apart. If the fence is 13 meters long, how many fence posts does he need? If the fence is 13 meters long, how many fence posts does he need?
November 16, 2011

Physics
If a&b are vectors such that a+3b=-3i+j & a-b=i-2j then find vectors a&b.
November 16, 2011

Math
A fence 8 ft tall runs parallel to a tall building at a distance of 4 ft from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?
November 14, 2011

Physics
Suppose vectors a&b, if a cross b=c. Show that c is perpendicular to a&b.
November 13, 2011

math
The height of an object thrown upward with an initial velocity of 96 feet per second is given by the formula h = -16t2 + 96t, where t is the time in seconds. How long will it take the object to reach a height of 144 feet?
November 9, 2011

Sport please help me i have a test 2morrow
What are the reasons for the olympic games to be largest of all sporting events?
November 9, 2011

Sport
Why Olympia selected to hold at the ancient Olympic Games?
November 9, 2011

english 2
WHAT INFERENCE CAN YOU MAKE FROM THE FACT THAT IT IS FORBIDDEN TO GO TO THE PLACE-BY THE WATER OF BABYLON
November 9, 2011

Physics
Calculate the rotational inertia of a wheel that has a kinetic energy of 41.6 kJ when rotating at 264 rev/min.
November 9, 2011

Pre-Algebra
ok well my pre algebra teacher copied some worksheets and its pg 40 and its about some friars in a floral shop buisness. for extra credit we do the joke which is also a way to find out if our answers were correct. there is no 3/8 in my answers and welll yeah thats it.
November 8, 2011

Pre-Algebra
Ok so im in 7th grade and can somone help me with pizzazz worksheet #40? Pretty please?
November 8, 2011

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