Saturday
January 31, 2015

Posts by Kyle


Total # Posts: 853

statistics
suppose a sample of 2404 tenth graders is drawn.Of the sampled, 601 read at or below the eighth grade level. using the data, construct the 98% confidence interval for the population proportion of tenth graders reading at or below the eighth grade level.
January 23, 2015

math
suppose a sample of 2404 tenth graders is drawn.Of the sampled, 601 read at or below the eighth grade level. using the data, construct the 98% confidence interval for the population proportion of tenth graders reading at or below the eighth grade level.
January 23, 2015

math
Suppose babies born in a large hospital have a mean weight of 3181 grams, and a standard deviation of 526. If 97 babies are sampled at random from the hospital, what is the probability that the mean weight of the sample babies would differ from the population mean by greater ...
January 23, 2015

algebra
Find the equation of the line passing through the points 2003-13-02-00-00_vl_files/i0030000.jpg and 2003-13-02-00-00_vl_files/i0030001.jpg. A. 2003-13-02-00-00_vl_files/i0030002.jpg B. 2003-13-02-00-00_vl_files/i0030003.jpg C. 2003-13-02-00-00_vl_files/i0030004.jpg D. 2003-13-...
January 15, 2015

Algebra
4x-1+3=4x My answer is -5 4x-1+3x=4x 3x+4x 8x-1 = 4x-8 -1 = -4x -1-4 = x -5 = x Am I correct
January 13, 2015

Algebra- Middle
My math question ask is 1/3(x-9) = 2x+7 greater than or less than 4/3(x+4)= -4x. The problem (1) answer = 6. Problem (2) answer = -1. Therefore problem (2) is less than problem (1). Are the answer to the equations correct. Sincerely
January 13, 2015

Math
Thank You Reiny, much appreciated. Could you tell Ms. Sue thanks for the heads up on the website math is fun, I have been learnign quite alot form it. Thank You again. Kyle
January 12, 2015

Math
If I were to compare -(-9)and -[-9] would it be less than, more than or equal to? I say it is equal to. Would I be right? Thank You for your help.
January 12, 2015

Math
Thank you very much Ms. Sue
January 12, 2015

Math
What rational number is less than 0 but greater than -1/2? I think its negative 1/4 would I be right? Thank You for your help.
January 12, 2015

Physics
Because he found the velocity per second so you have to multiply by two to get the answer for two seconds
January 7, 2015

college pre-calculus
what is the equation of lowest degree with real coefficients if two of its roots are -1 and 1+i? A. x^3+x^2+2=0 B. x^-x^2-2=0 C. x^3-x+2=0 D. x^3-x^2+2=0 e. none of the above i dont get it is it (x+1) (1+i)
January 6, 2015

ap chemistry
thanks
January 6, 2015

ap chemistry
no she didnt give it sadly
January 6, 2015

ap chemistry
calculate the concentration of CO2 in a soft drink after the bottle is opened and equilibrates at 25C under a CO2 partial pressure of 0.0003 atm. c=KP henry's law k=? P=0.0003 atm. how to solve
January 6, 2015

ap chemistry
calculate the concentration of CO2 in a soft drink after the bottle is opened and equilibrates at 25C under a CO2 partial pressure of 0.0003 atm. c=KP henry's law k=? P=0.0003 atm. how to solve
January 6, 2015

chemistry
i need help
January 6, 2015

chemistry
calculate the concentration of CO2 in a soft drink after the bottle is opened and equilibrates at 25C under a CO2 partial pressure of 0.0003 atm. c=KP henry's law k=? P=0.0003 atm. how to solve
January 6, 2015

college
a solution is prepared by mixing 50.0 mL toluene (C6H5CH3 d=0.867 g/mL) with 125 mL Benzene (C6H6 d=0.874 g/mL). assuming that the volumes add upon mixing, calculate the mass percent, mole fraction, molality, and molarity of the toluene.
January 5, 2015

chemistry
a solution is made by dissolving 25 g NaCl in enough water to make 1.0 L solution. Assume that density of the solution is 1.0 g/mL. calculate the mass percent, molarity, molality, and mole fraction of NaCl. whats wrong 25 g NaCl 1.0 L solution 1.0 g/mL 25 g NaCl/58.44 g NaCl...
January 5, 2015

college chemistry
a solution is made by dissolving 25 g NaCl in enough water to make 1.0 L solution. Assume that density of the solution is 1.0 g/mL. calculate the mass percent, molarity, molality, and mole fraction of NaCl.
January 5, 2015

science
a solution is made by dissolving 25 g NaCl in enough water to make 1.0 L solution. Assume that density of the solution is 1.0 g/mL. calculate the mass percent, molarity, molality, and mole fraction of NaCl.
January 5, 2015

ap chemistry
tanks
January 5, 2015

ap chemistry
what else is right?
January 5, 2015

ap chemistry
its touluene
January 5, 2015

ap chemistry
what else is right help me
January 5, 2015

ap chemistry
is that right answer
January 5, 2015

ap chemistry
HELP ME WITH THIS ONE WHEN DONE WITH THE OTHER THX calculate the concentration of CO2 in a soft drink after the bottle is opened and equilibrates at 25C under a CO2 partial pressure of 0.0003 atm. c=KP henry's law k=? P=0.0003 atm. how to solve
January 5, 2015

ap chemistry
i figureed is this right DrBOb22 is my ansswers right mass percent: 43.359/152.6gx100= 28.4% mass of benzene: 25 mLx .874 g/mL= 109.25 grams mass of touluene: 50 mLx .867 g/mL= 43.35 grams molarity: .251 mol/.175 L= 1.43 M molality: .251 mol/ .10925 kg= 2.30 m x touluene= .470...
January 5, 2015

ap chemistry
need help
January 5, 2015

ap chemistry
is this right: mass percent: toluene 28.4 % benezene: 7.6% mole fraction x C6H5CH3: .251 mole fraction of X C6H6 1.619 molality: 2.3 molal molarity: 1.43 M is that right? idk
January 5, 2015

ap chemistry
mass of benzene is 0.874 g/ml mass of toluene= 0.867 g/mL
January 5, 2015

ap chemistry
i dont know how to do it
January 5, 2015

ap chemistry
but how u do it explain please
January 5, 2015

ap chemistry
a solution is prepared by mixing 50.0 mL toluene (C6H5CH3 d=0.867 g/mL) with 125 mL Benzene (C6H6 d=0.874 g/mL). assuming that the volumes add upon mixing, calculate the mass percent, mole fraction, molality, and molarity of the toluene.
January 5, 2015

chemistry
calculate the concentration of CO2, in a soft drink after the bottle is opened and equilibriates at 25C under a CO2 partial pressure of 0.0003 atm.
January 5, 2015

chemistry
a solution is prepared by mixing 50.0 mL toluene (C6H5CH3 d=0.867 g/mL) with 125 mL Benzene (C6H6 d=0.874 g/mL). assuming that the volumes add upon mixing, calculate the mass percent, mole fraction, molality, and molarity of the toluene.
January 5, 2015

science
a solution is made by dissolving 25 g NaCl in enough water to make 1.0 L solution. Assume that density of the solution is 1.0 g/mL. calculate the mass percent, molarity, molality, and mole fraction of NaCl.
January 5, 2015

ELA
I'm reading the Iliad and a question has come up - What is the conflicting message about the relationship between humans and the gods does this myth give? Any help with this would be much appreciatd. Thank You
January 5, 2015

AP Chemistry
Consider the following reaction: CH3X + Y --> CH3Y + X At 25 degrees Celcius the following two experiments were run, yielding the following data: Experiment 1: [Y]0 = 3.0 M [CH3X] (mol/L) Time (hours) 7.08*10^-3 1.0 4.52*10^-3 1.5 2.23*10^-3 2.3 4.76*10^-4 4.0 8.44*10^-5 5....
January 1, 2015

College Algebra
According to Newton's law of cooling, the rate at which an object cools is directly proportional to the difference in temperature between the object and the surrounding medium. The face of a household iron cools from 130° to 100° in 30 minutes in a room that ...
December 10, 2014

College Algebra
The number of bacteria in a certain culture increased from 500 to 1000 between 7:00 A.M. and 9:00 A.M. Assuming growth is exponential, the number f(t) of bacteria t hours after 7:00 A.M. is given by f(t) = 500(2)^t/2. (a) Estimate the number of bacteria in the culture at 8:00 ...
December 10, 2014

Math
A length of rope is stretched between the top edge of a building and a stake in the ground. The head of the stake is at ground level. The rope also touches a tree that is growing halfway between the stake and the building. If the tree is 38 feet tall, how tall is the building...
December 4, 2014

ELA
Have been all over Google looking for laymans terms for this - coulden't find anything but thanks anyway
December 2, 2014

ELA
Athena asks Zeus "will you save a man whom the fates appoint to die?" How does this question relate to the overall theme in the iliad? SOOOOO CONFUSED Please help - Thank You
December 2, 2014

Math
A town has 4900 registered voters, each of whom is either a Republican, a Democrat or an Independent. In the last primary election, 1150 people voted, and the number of Republicans who voted was 720 fewer than 30% of the total number of Democrats plus Independents combined. ...
November 30, 2014

physics
The acceleration of gravity is 9.8 m/s2 . What is the magnitude of the total force on a(n) 75 kg driver by the dragster he operates as it accelerates horizontally along a straight line from rest to 66 m/s in 4.5 s? Answer in units of kN
November 22, 2014

Math
Thank You Very Much Derius.
November 19, 2014

Math
Everyday I practice the drums for the same length of time. By the end of the 15th week, I have practiced a total of 37 1/2 weekday hours. How many hours do I practice a day? I did 15 x 5 to get 75 days then divided by 37 1/2 hours to get how many hours per day am I doing this ...
November 19, 2014

Math!
Let h(x)=4-x. Use h, the table, and points on graph to evaluate the expression. x 2 3 4 5 6 f(x) −1 0 1 2 3 g(x) points (-1,1), (2,3), (3,5) (a) (g^−1 compose f^ −1)(2) (b) (g^−1 compose h)(1) (c) (h^−1 compose f compose g^-1)(3)
November 19, 2014

College Algebra
Ozone occurs at all levels of Earth's atmosphere. The density of ozone varies both seasonally and latitudinally. At a given city, the density D(h) of ozone (in 10^−3cm/km) for altitudes h between 20 kilometers and 35 kilometers was determined experimentally. For the ...
November 12, 2014

College Algebra
Find the standard equation of a parabola that has a vertical axis and satisfies the given conditions. x-intercepts −2 and 8,highest point has y-coordinate 5
November 12, 2014

College Algebra
An object is projected vertically upward from the top of a building with an initial velocity of 112 ft/sec. Its distance s(t) in feet above the ground after t seconds is given by the equation s(t) = −16t^2 + 112t + 100. (a) Find its maximum distance above the ground. s(t...
November 12, 2014

Math
How would you order the following from least to greatest? 1/4, 0.2, 3/8, 30% Would it be 0.2, 1/4, 30% and 3/8? This was my answer but it was marked wrong? Where did I go wrong? Thanks for your help
November 10, 2014

College Math
An object is projected vertically upward with an initial velocity of v0 ft/sec, and its distance s(t) in feet above the ground after t seconds is given by the formula s(t) = −16t^2 + v0t. (a) If the object hits the ground after 8 seconds, find its initial velocity v0. v0...
November 10, 2014

Physics
A plane is flying horizontally with speed 251 m/s at a height 2180 m above the ground, a package is thrown downward from the plane with a vertical speed v1 = 80 m/s. What is the magnitude of the total velocity of the package at the moment it is thrown as seen by an observer on...
November 7, 2014

Physics
A block of mass m = 3.65 kg is attached to a spring (k = 27.5 N/m) by a rope that hangs over a pulley of mass M = 7.30 kg and radius R = 2.81 cm, as shown in the figure. a) Treating the pulley as a solid homogeneous disk, neglecting friction at the axle of the pulley, and ...
October 31, 2014

Physics
I would really appreciate the help for this assignment. A small reasoning for the answer would be very helpful. Thank you. A sphere of mass m and radius r is attached to the rim of a disk (mass M, radius R). The disk is rotating counter-clockwise with a constant period T ...
October 31, 2014

Math
Sue bought an ice cream cone from Dairy Queen. The cone had a radius of 3cm and a height of 8cm. If I use the formula of (TT=3.14, r=radius, h=height) 2 V=1/3TTr h Is the answer 50.24 cm3? Any help is appreciated. If I'm not right could you tell/show me how to figure this ...
October 27, 2014

Math
Still not getting it - but if I were to guess I would probably pick D? I will go back to math is fun site and study some more! Thanks again, Kyle
October 25, 2014

Math
Oh My God! The expression is 2(n-6) So sorry Ms. Sue
October 25, 2014

Math
Which verbal expression represents the algebraic expression? (A) 2 times a number minus 6 (B) twice the difference between 6 and a number (C) 6 less than twice a number (D) twice the difference between a number and 6 I think it's A, am I right? Thank You for your help.
October 25, 2014

Math
Thanks for the site will go on it. Thanks again. Kyle
October 24, 2014

Math
Thank You Ms. Sue, I'll get the hang of this eventually!!!!!
October 24, 2014

Math
Yes, it's me again! How would you write the expression that represents the perimeter of a rectangle measuring 4 x - 4 + 7 x + 1 Would it be -4 + 1 = - 5
October 24, 2014

Math
I meant to say would it be 26 x + 12
October 24, 2014

math
Thank You
October 24, 2014

math
How would you write the expression that represents the perimeter of a rectangle measuring 9 x + 9 and 4 x - 3 Would it be 26 x + 2 Any help would be appreciated. Thank You
October 24, 2014

Math
Ah Yes! Thank You
October 21, 2014

Math
Am I right? Nobby Hobby charges $35.00 entry fee plus $18.50 per night of camping. Write an algerbraic expression for the cost in dollarsof entry to Nobby Hobby ($35.00+$18.50).n Thanks
October 21, 2014

Quick math help
faction in simple form
October 15, 2014

physics
Nevermind
October 14, 2014

physics
016 10.0 points One of the great dangers to mountain climbers is an avalanche, in which a large mass of snow and ice breaks loose and goes on an essentially frictionless “ride” down a mountainside on a cushion of compressed air. The acceleration of gravity is 9.8 m/...
October 14, 2014

Math
It is better to use fractions when it is on top of other fractions, for example 2/3+2/4 ----------- 2/5-2/6 Because then you can get a common demoninator and cancel For decimals I don't know pretty much everything else
October 14, 2014

physics
016 10.0 points One of the great dangers to mountain climbers is an avalanche, in which a large mass of snow and ice breaks loose and goes on an essentially frictionless “ride” down a mountainside on a cushion of compressed air. The acceleration of gravity is 9.8 m/...
October 14, 2014

Math
Did you type that in right?
October 14, 2014

math
Did you try distributing
October 14, 2014

math
6 is the largest common factor
October 8, 2014

math
i am so confused, can you teach me?
October 8, 2014

math
5?
October 8, 2014

math
the factorization of 18 is 2x3x3, and the 60 is 2x2x3x5. so the question is asking the greatest so 3 is not correct? maybe 2?
October 8, 2014

math
Q2 answer is 3?
October 8, 2014

math
There are 18 boys and 60 girls working on a community service project. They work in groups where each group has the same number of boys and the same number of girls. Q1: What is the first step to finding the greatest number of groups possible? A. Multiply 18 times 60 B. Divide...
October 8, 2014

Physics
A 5.00×10^5-kg rocket is accelerating straight up. Its engines produce 1.250×10^7 N of thrust, and air resistance is 4.50×10^6 N. What is the rocket’s acceleration? I just need the formula for finding the acceleration.
October 1, 2014

Math (LCM)
A music store gives every 20th customer a $5 gift card. every 50th customer gets a $10 gift card. Which customer will be the first to receive both types of gift cards? Use prime factorizations.
September 30, 2014

Physics
A 103 kg sprinter wishes to accelerate from rest to a speed of 13.2 m/s in a distance of 19.3 m. What coefficient of static friction is required between the runners shoes and the track?
September 29, 2014

Math
3sqrt(5x-6) + 2sqrt(7-x) = 13
September 24, 2014

Math
A conical paper cup is to have a height of 3 inches. Find the radius r of the cone that will result in a surface area of 6ðin^2.
September 24, 2014

Math
Determine all values of k for which each pair of vectors is orthogonal. a) (1,2) and (k,k) b) (1,2,1) and (k,2k,4)
September 24, 2014

math
Determine all values of k for which each pair of vectors is orthogonal. a) (1,2) and (k,k) b) (1,2,1) and (k,2k,4)
September 23, 2014

Algebra
Logan saves $5.50 in dimes and quarters over a week. He has 20 more dimes than quarters. Find the number of dimes and quarters he saves.
September 23, 2014

Math
Find a unit vector in the direction of(1/2, 1/2, 1/2).
September 23, 2014

Algebra
x^3 + 6x^2 + 10x = 0
September 19, 2014

Math
The speed of the current in a stream is 4 mi/hr. It takes a canoeist 96 minutes longer to paddle 13 miles upstream than to paddle the same distance downstream. What is the canoeist's rate in still water?
September 15, 2014

math
given the domain of g(x) is (-3,5) and the range of g(x) (-10, 10) find the domain and range of the transformed function 4g(x-7)+12
September 14, 2014

Math
A pizza box with a square base is to be made from a rectangular sheet of cardboard by cutting six 1-inch squares from the corners and the middle sections and folding up the sides (see the figure). If the area of the base is to be 144 in^2, what size piece of cardboard should ...
September 14, 2014

Physics
While entering a freeway, a car accelerates from rest at a rate of 2.3 m/s2 for 12 s.How far does the car travel in those 12 s, in meters?
September 14, 2014

math
You are running a fuel economy study. one of the cars you find is blue. it can travel 35 1/2 miles on 1 1/4 of gasoline. Another car is red. It can travel 27 1/5 on 4/5 gallon of gasoline. What is the unit rate for miles per gallon for the blue car? what is for the red?
September 10, 2014

Math
(2x^3y^2z)-2/(3x^4yz^-2)^-2
September 10, 2014

math
A rectangular box is to have a square base and a volume of 30 ft3. The material for the base costs 33¢/ft2, the material for the sides costs 10¢/ft2, and the material for the top costs 24¢/ft2. Letting x denote the length of one side of the base, find a function...
September 7, 2014

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