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Posts by ashley

Total # Posts: 3,437

physical eduaction
Which of the following does NOT describe the concept of Growth? (Points : 1) a. measured quantitatively b. physical change c.influenced by children’s abilities d. increase in bone size

Sequences
If {x_n} is not bounded above, does x_n -> infinity? prove there exist a subsequence {x_n} where k=1 to infinity such that x_n_k -> infinity

Algebra
re-evaluate your terms. I got x^4 +5x^3 -x^2 -5x-4. my work: .5(2x^2 +4x +2)(x^2 +3x -4)=.5(2x^4+6x^3-8x^2+4x^3+4x^2 -16x+2x^2 +6x-8)

statistics and probability
A company manufactures washers, about 5% of which are defective. If a random sample of 100 washers are inspected, what is the probability that fewer than 4 are defective?

Clinical Chemistry
Not sure that is what the question asks from my instructor. I am totally confused.

Clinical Chemistry
I am not sure how to start this. You are given a 200% solution of a compound. You must dilute and construct a calibration curve to interpret concentration of compound in unknown samples. Show the steps needed to perform a two-fold serial dilution through 5 tubes.

physical eduaction
what can potentially have the most impact on physical education outcomes other than class size? a .type of equipment used b. amount of equipment available c. attitude of the classroom teacher d. lack of funding for equipment

Chemistry
Beryllium flouride's formula is BeF2. Why do beryllium and flourine combine in a 1:2 ratio?

Math
Limit as n goes to infinity of ((2n)!/(n^n)).

math
Anthony is 20. and julian is 10.

Calculus
Find the work done by F(x,y,z)=(x^2y)i=(x-z)j+(xyz)k where c=(t)i+(t^2)j+(2)k, 0<t<1. The answer is supposed to be -17/15, but i keep getting -13/10. Any help on the process would be appreciated.

Math
The medical records of infants delivered at Kaiser Memorial Hospital show that the infants' lengths at birth (in inches) are normally distributed with a mean of 22 and a standard deviation of 2.1. Find the probability that an infant selected at random from among those ...

Physical Science
I am so confused. I do not get it at all.

Physical Science
A 5.00 kg block of ice at –25 oC is converted to steam at 125 oC. How much energy (in kilojoules) is expended in this process? The following data are provided: a. Specific heat of ice = 2.092 J/g oC b. Latent heat of fusion = 334.72 J/g c. Specific heat of water = 4.184 J...

Physical Science
Lead is a soft, dense metal with a specific heat of 0.117 J/goC, a melting point of 328.0 oC, and a heat of fusion of 23012 J/g. How much heat (in kilojoules) must be provided to melt a 350.0 kg sample of lead that is initially at 20 oC?

Limits
I know that 1/n goes to zero so 2^0=1 so obviously the limit is 1. But i have to write it out and I can't seem to figure out the correct way to do this.

Limits
Prove using formal definition of limit: Lim 2^(1/n)=1 n->ininity

Mathematica
I am trying to write a matrix where n=100, and the matrix's first and last number is 2 and all the number in the middle are 1.

Clark Atlanta
Plants need carbon dioxide to produce energy. How many carbon are there in 10.0 g of carbon dioxide? this is what I have so far. 10.0g x 1mol/44.01CO2 = 227 mol CO2

8th grade language arts
Can someone post the answers to this question please.

phyics
_________ was the first to show that all objects fall toward Earth with constant ____________.

Proof
Let {x_n} and {y_n} be real valued sequences suppose x_n->0 and {y_n} is bounded. Prove that (x_n*y_n)->0

Calculus
Use linear approximation, i.e. the tangent line, to approximate \sqrt[3] { 7.9 } as follows: The equation of the tangent line to f(x) at x = 8 can be written in the form y = Using this, we find our approximation for \sqrt[3] {7.9} is

Chemistry
How would the empirical formula of copper (II) sulfate be affected if some of the sample sticks to the stirring rod?

Math
If the first dice yields an even number, what is the probability that the sum of the two dices will be equal to 12? 1st Die P(even) = 3/6 = 0.50 P(6|even) = 1/3 = 0.333 2nd Die P(6) = 1/6 = .1667 So P(12) = 0.33*0.1667 ?

Probability
If the first dice yields an even number, what is the probability that the sum of the two dices will be equal to 12? 1st Die P(even) = 3/6 = 0.50 P(6|even) = 1/3 = 0.333 2nd Die P(6) = 1/6 = .1667 So P(12) = 0.5*0.33*0.1667 ?

algebra
what is the area of a rectangle with a length that is 5 more than triple the width?

calculus
Find the center of mass in the 1st quadrant of the circle x^2+y^2=4 where rho(x,y)=k(x^2+y^2) Thanks.

math
Marcus Has 5 sticks, He gave away 0.75 of each stick away. How Many Did He He Give Away

English Writing
Can you help me write a persuasive paragraph? The topic is about 'Disposal Food'

spanish
en el primer piso puedes encontrar

Poofs
Let {X_n} be a sequence of real numbers that is bounded above by M and such that X_n-->x Prove that x<=M. This is what I have, but I believe it is wrong: Let M>0 then there exist N>=1 s.t. n>=N. then |x_n - x|<M. Since {x_n} is bounded above by the given {x_n...

Math Proof
Let {X_n} be a sequence of real numbers that is bounded above by M and such that X_n-->x Prove that x<=M

Physics
I'm having a bit of trouble with this problem. A ball is thrown upwards and stays in the air for 3.65 seconds. What is the initial velocity? (I use an acceleration of -10 m/s/s) I got an answer of 18.25 m/s/s but I'm not sure that it's correct. I would love some help!

Physics
I'm having a bit of trouble with this problem. A ball is thrown upwards and stays in the air for 3.65 seconds. What is the initial velocity? (I use an acceleration of -10 m/s/s) I got an answer of 18.25 m/s/s but I'm not sure that it's correct. I would love some help!

Physics
Thanks so much!

Physics
I'm having some trouble figuring out how to do the following question: A ball punted vertically has a hang time of 3.65 seconds. What was its initial velocity? (I use an acceleration of -10 m/s/s) Thanks!

Math
You can use the Pythagorean equation (a^2 + b^2= c^2 ) because the triangle the diagonal and the 2 sides make is a right triangle. H= height of rectangle 14+H= width of rectangle H^2 + (14+H)^2 = 26^2 Solve for h to find height:)

math
16

math
Yolo has two pieces of string. One is 32 inches long, and the other is 48 inches long. She wants to make as many necklaces as she can, all of the same length. What is the longest a necklace can be?

Math
There are 54 graders who play sports. Twenty-seven play baseball. The rest play soccer. Second grade has 37 soccer players. How many students play soccer?

Math
fx=logx2

Statistics
You own shares of Fidelity Magellan Fund (FMF), which concentrates on stocks of large American companies. Its monthly return is μFMF = 1.4% and sFMF = 4.70%. You decided to diversify your portfolio by adding shares of the Fidelity Japan Fund (FJF), which has monthly ...

Statistics
In a sophisticated medicine research center, two scales are used for repeated weighing of the same item. If the true weight of a compound is 2 grams [g], the first scale produces readings X that have a mean 2.0 g and standard deviation 0.03 g. The second scale’s readings ...

Math
An airplane flys at a constant altitude of 2 miles and a constant speed of 600 miles per hour on a straight course that will take it directly over a kangaroo on the ground. How fast is the angle of elevation of the kangaroo's line of sight increasing when the distance from...

English
After one drink, he drank another, it means that he fluidly drank a lot, until he fell asleep

Pre Calculus
It does not say anything really about finding how many positive and negative roots. It only says how you can find the number of zeros.

Pre Calculus
Using Descartes' Rule of Signs how can you determine the number of positive and negative zeros (roots) a polynomial may have?

History *repost* (sorry!)
Yes, I believe so

Math
I see, for this problem you would have to plug in numbers with trial and error, by doing this you get x=-2 as one of the roots, then you would factor (x+2)out of the problem. Then you would get x²-6x+9. This is a perfect square, so when you factor that, you get (x-3)^2. ...

Math
You would factor by grouping

AP English Language and Comp
Chillingworth, because he practically devoted his whole life to evil

AP English Language and Comp
Whose sin is blacker- Chillingworth's or Dimmesdale's? Why? (The Scarlet Letter)

math
99

Algebra II
You are correct!

Geography
By footprints do you mean carbon footprint? If so, countries with larger carbon footprints are generally more advanced and are industrialized, while countries with smaller footprints are generally less developed.

Pre Calculus
It says, Use the Factor theorem to determine whether x-c is a factor of x: f(x)=-4x^3 +5x^2 +8 and c=-2 That is what it says in the textbook

Pre Calculus
If f(x)=-4x^3 +5x^2 +8 and c=-2 is c a factor of x?(Use the Factor Theorem)

Math
They are imaginary because a negative number cannot be square rooted.

Math Proof
0<=b_n<=a_n. a) if a_n-->0 then b_n-->0. b) if a_n-->infinity then b_n-->infinity I don't know where to start.

math
Is she giving 3 pieces of candy to each student?

Algebra
Find a number such that the sum of two times the number and six times its reciprocal is 79/5.

Chemistry
I am not getting the write answer with this... Please help

US History
The teacher didn't give us a textbook, I would just like to know the different economic purposes between the two colonies.

US History
Can you elaborate on that a little bit more?

US History
Although the New England, and the Chesapeake region were both settled largely by people of english orgin, by 1700 the regions had evolved into 2 distinct societies. Why did this difference in development occur?

Geography
Should geographers regard culture and social customs as generalizations about a group of people, or should they say it comes from people's interaction with the physical environment?

math
In mathematics class, 30 students received an A on the third test, which is 125% of the students who received an A on the second test. How many students received an A on the second test?

math
explain what do you need to do to extend number pattern?

Health--check my answers
no I did the test and it's true false 30 then the rest is right

English
Reversed the order of subject and verb

Pre-Calculus/Trigonometry
-y=-3x y=3x 5x+2(3x)=22 5x+6x=22 11x=22 x=2 y=3(2) y=6

EVERYONE
HI. For one of my classes i need to invent/innovate a product. So it is a year long project and if anyone has anyone sort of ideas it would be really helpful. Thanks (Thin along the lines of what you really hate and need fixed)

Numerical Analysis
Find the parabolically terminated cubic spline through the data ppoints (0,1),(1,1)(2,1)(3,1),(4,1). Is this spline also not-a-Knot? natural?

math mks
the tempreture was -8 f at 6 a.m. and rose 15 f at 9 a.m. the answer is 7 what is the question?

Physics
A swimmer, capable of swimming at a speed of 1.44 m/s in still water (i.e., the swimmer can swim with a speed of 1.44 m/s relative to the water), starts to swim directly across a 2.21-km-wide river. However, the current is 0.840 m/s, and it carries the swimmer downstream. (a) ...

physics
A radar antenna is tracking a satellite orbiting the earth. At a certain time, the radar screen shows the satellite to be 118 km away. The radar antenna is pointing upward at an angle of 58.2 ° above the ground. Find (a) the x and (b) the y components (in km) of the ...

Abstract Algebra
If G is a group with exactly 66 elements of order 14, how many subgroups of order 14 does G have?

math problem (please help)
d. (f+g)(x)=f(x)+g(x), just add the two polynomials together. you'll get 5x^2-x-4

math problem (please help)
switch your x and y like original : y=(7x-8)/(x-1) to: x=(7y-8)/(y-1) and solve for y. so: xy-1=7y-8=> xy-7y=-7=> y(x-7)=-7 => y=-7/(x-7)

statistics
The 92 million Americans of age 50 and over control 50% of all discretionary income (AARP Bulletin, March 2008). AARP estimated that the average annual expenditure on restaurants and carry out food was $1873 for individuals in this age group. Suppose this estimate is based on ...

Chemistry
A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 400mL of a solution that has a concentration of Na+ ions of 1.10M ?

Metric Spaces Proof
d(x,y)={ 1 if x does not equal y 0 if x=y Prove that d satisfies the axioms of a metric. clearly it satisfies d(x,y) existing in the reals, and d(x,y)>=0 and d(x,y)=0 iff x=y. why I don't know is triangle inequality and d(x,y)=d(y,x).

Math Proof
On the real line, define d (x, y ) = sqrt(abs(x − y)) . Prove that d satisfies the axioms of a metric.

math
I wasn't given any

math
What is the domain and range of ln(4-x-y)

math
I am number less than 10. When I am divided by 2, half of that number is also 2. what number am I?

Physics
A relativistic proton has a momentum of 1.0×10^-17 kg ∙ m/s and a rest energy of 0.15 nJ. What is the kinetic energy of this proton? (c = 3.00 × 108 m/s, mass of proton = 1.67 × 10-27 kg)

physics
A car travels along a straight stretch of road. It proceeds for 11.4 mi at 57 mi/h, then 21.8 mi at 43 mi/h, and finally 30.8 mi at 32.6 mi/h. What is the car’s average velocity during the entire trip?

math
I am a whole number. when you add 3 to me you get a 2-digit number. The 2-digit number is the same as 3 four times. What number am I?

Physics
1. A cannon mounted on the back of a ship fires a 50.0 kg cannonball in the horizontal direction at a speed of 150 m/s. If the cannon and ship to which it is firmly attached have a mass of 4.00 x 103 kg and are initially at rest, what is the speed of the ship just after ...

math
Write an equation relating the number of questions I get right on a test to the total score I will get if the test has 20 questions each with the same point value and the test is worth 100 points total. I know each question is worth 5 points so I would think that N (number ...

health
C.

MATH
4X/5+1/7=8

Math Proof:
Can you say: Since x in E then E is not empty and is a subset of the reals. Since there exist and x in E where a<x then a is a lower bound of E. then let lambda be a different lower bound in E then let a precede lambda. this can't occur because we stated that a is a ...

Math Proof:
Let a,b exist in the reals with a<b. (i) for the open interval E=(a,b), prove that infE=a and supE=b. (ii) for the closed interval F=[a,b], prove that the infF=a and infF=b.

Math Proof
Prove: Let a,b exist in the reals with a<b, (i) For the open interval E=(a,b) prove that the inf E=a and sup E=b (ii) for the closed interval F=[a,b], prove that inf F=a and sup F=b.

Math Proof
Find a rational number and an irrational number between x=8.9949926 and y=8.995

chemistry
The typical person needs a 2000 calorie diet to sustain “normal” activity. Nowadays, a lot of the energy in American diet comes from fats and sugars. Assume that “fats” provide 9.0 calories per gram and sugars (treat as glucose) provide 4.5 calories per ...

Numerical Analysis
Consider the equation 8x^4 − 12x^3 + 6x^2 − x = 0. For each of the two solutions x = 0 and x = 1/2, decide whether the Bisection Method or Newton’s method will converge faster (say to eight place accuracy), without running the calculation. I don't ...

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