# Posts by Yoona

Total # Posts: 41

**math**

a rectangu7loar field is to be enclosed with exactly 240 meters of fencing materials. if the length is 8 meters more than the width, find the dimensions of the field with solution pls.

*January 13, 2015*

**math for me!!!!!!**

Wait what is the answer then??

*June 2, 2014*

**calculus**

The three pigls are building their houses while the brik=ck house building pig and the stick house building pig are working at a steady rate, the straw house building pig(knowing the wolf will arrive first at his house) is frantically increasing his rate of building by 2feet/...

*March 29, 2012*

**calculus**

3. Let f be the function defined by f(x)=ln(2+sinx) for pi<=x<=2pi a. Find the absolute maximum value and the absolute minimum value of f. Show the analysis that leads to your conclusion. b. Find the x-coordinate of each inflection point on the graph of f. Justify your ...

*February 13, 2012*

**calculus**

1. Let f be the function that is defined for all real numbers x and that has the following properties. (i) f''(x)=24x-18 (ii) f'(1)=-6 (iii) f'(2)=0 a. Find each x such that the line tangent to the graph of f at (x, f (x)) is horizontal b. Write an expression ...

*February 13, 2012*

**calculus**

5. If f (x)=(2x+1)^4 then the 4th derivative of f(x)=0 at x = 0 is..

*February 12, 2012*

**calculus**

2. Let f(x) = ksin(kx), where k is a positive constant. Find the area of the region bounded by one arch of the graph of f and the x-axis

*February 12, 2012*

**calculus(Lab)**

Well, first graph the graph of f(x)=-1/10x^2 + 3 2. We are going to approximate the area between f and the x-axis from x = 0 to x = 4 using rectangles (the method of Riemann sums). This is not the entire area in the first quadrant, just most of it. Draw four inscribed ...

*January 25, 2012*

**Research paper(economics)**

how many Parks and Resorts does Disney have? It's for an economic projects. thank you

*January 21, 2012*

**Research paper(economics)**

thank you. Really appreciate it

*January 21, 2012*

**Research paper(economics)**

so is it profitable? I'm novice when it comes to economics

*January 21, 2012*

**Research paper(economics)**

How do you find how Ebay is doing economically, like an economic overview.

*January 21, 2012*

**calculus**

5. Let for and f(x)=12X^2 for x>=0 and f(x)>=0 a. The line tangent to the graph of f at the point (k, f(k)) intercepts the x-axis at x = 4. What is the value of k? b. An isosceles triangle whose base is the interval from (0, 0) to (c, 0) has its vertex on the graph of f...

*January 3, 2012*

**calculus**

6. Determine a, b, c, and d so that the graph of y=ax^3+bx^2+cx+d has a point of inflection at the origin and a relative maximum at the point (2, 4). Sketch the graph.

*January 3, 2012*

**calculus**

3. The radius r of a sphere is increasing at a constant rate of 0.04 centimeters per second. (Note: The volume of a sphere with radius r is v=4/3pir^3 ). a. At the time when the radius of the sphere is 10 cm, what is the rate of increase of its volume? b. At the time when the ...

*January 3, 2012*

**calculus**

2. Consider the function f defined by f(x)=(e^X)cosx with domain[0,2pie] . a. Find the absolute maximum and minimum values of f(x) b. Find the intervals on which f is increasing. c. Find the x-coordinate of each point of inflection of the graph of f.

*January 2, 2012*

**calculus**

sorry for the double post

*January 2, 2012*

**calculus**

2. Consider the function f defined by f(x)=(e^X)cosx with domain[0,2pie] . a. Find the absolute maximum and minimum values of f(x) b. Find the intervals on which f is increasing. c. Find the x-coordinate of each point of inflection of the graph of f.

*January 2, 2012*

**calculus**

1. A sheet of cardboard 3 ft. by 4 ft. will be made into a box by cutting equal-sized squares from each corner and folding up the four edges. What will be the dimensions of the box with largest volume? so I did V=lhw and found l=4-2h and w=3-2h I also distributed them in the ...

*December 18, 2011*

**calculus**

3. Given the function defined by y = x + sinx for all x such that -π/2<=x<=3π/2 a. Find the coordinate of all maximum and minimum points on the given interval. Justify your answers. b. Find the coordinates of all points of inflection on the given interval. ...

*December 18, 2011*

**calculus**

5. Find the point (x, y) on the graph of y=sqr(x) nearest the point (4, 0).

*December 18, 2011*

**calculus**

1. A sheet of cardboard 3 ft. by 4 ft. will be made into a box by cutting equal-sized squares from each corner and folding up the four edges. What will be the dimensions of the box with largest volume?

*December 18, 2011*

**calculus(differentian)**

x=(6-2y²)/(1+y) differentiate with respect to y I saw this in a question here but..I don't get how the person go that answer.

*December 4, 2011*

**calculus(QUICK QQUESTION!!)**

if f(t) were continious on the interval [-2,1] but youo were only given the function for t=-2,-3/2,-1,-1/2 ..,3/2 and 2, explain how would you apporximate f'(1)

*December 1, 2011*

**calculus**

They're actaully 2 question :D 1.find the rate of change of the distance between the orgin and a moving point on the graph of y=x^2+1 if dx/dt=2 centimeters per second when x=1. 2.A triangular trough is 12 feet long and 3 feet across the top. it ends are isosceles ...

*November 30, 2011*

**Calculous**

A dunction is continious on the closed interval [-3,3] such that of f(-3)=4 and f(3)=1. The functions F' anf F'' have the properties shown below Ok there's supposed to be a table but you cant really see it -3<x<-1 F'(x) is positive F''(X) is ...

*November 21, 2011*

**AP Calculous**

f(x) is both functions.. I don't know why the system didn't let me keep the spaces to show that

*November 21, 2011*

**AP Calculous**

let f be the function defined by |x-1|+2 for X<1 f(x)= ax^2-Bx, for X>or equal to 1. where a and b are constants a)if a=2 and b=3 is f continious for all x? justify your answer b)describe all the values of a and b for which f is a continious function c) For what values ...

*November 21, 2011*

**Calculous**

the figure shows the graph of F', the derivative of a function f. the domain of the function f is the set of all X such that -3< or equal to x<or equal to 3 a)for what values of x in the domain does f have a relative max and amin? justify b) for what values of x is ...

*November 21, 2011*

**Calculous**

let f be the function defined by |x-1|+2 for X<1 f(x)= ax^2-Bx, for X>or equal to 1. where a and b are constants a)if a=2 and b=3 is f continious for all x? justify your answer b)describe all the values of a and b for which f is a continious function c) For what values ...

*November 21, 2011*

**Calculous**

let f be the function defined by f(x)=12x^2/3 -4X a)find the intervals on which f is increasing I got the rest of the question but I'm still not getting the increasing/decreasing thing

*November 20, 2011*

**Calculous**

thanks!!! that was VERY helpful!!

*November 20, 2011*

**Calculous**

opps it is x(t)=t^3-6t^2+9t+11 Sorry!!

*November 20, 2011*

**Calculous**

A particle moves along the c-axis so that at time t its position is given by x(t)=t^2-6^t+9t+11 a)What is the velocity of the particle at t=0 b)During what time intervals is the particle moving to the left? c)What is the total distance traveled by the particle t=0 to t=2

*November 20, 2011*

**AP Calculous**

let f be the function defined by f(x)=3X^5 -5X^3 +2 a) on what interval is f increasing? b) on what interval is the graph of f concave upward? c)Write the equation of each horizontal line tangent to the graph of f

*November 20, 2011*

**calculous**

thank you!!!!!!!!!!! I don't think any of my teachers would deticate some of their time for us:D

*November 7, 2011*

**calculous**

A particle moves on the x –axis so that its position at any time is given by x(t) = 2t3 + 1. a. Find the acceleration of the particle at t = 0. b. Find the velocity of the particle when its acceleration is 0. c. Find the total distance traveled by the particle from t = 0 ...

*November 7, 2011*

**calculus**

5. Let f be the function given by f(x) = x3- 7x + 6. a. Find the zeros of f b. Write an equation of the line tangent to the graph of f at x = -1 c. Find the x coordinate of the point where the tangent line is parallel to the secant line on the interval [1, 3].

*November 7, 2011*

**AP Calculous**

A particle moves on the x –axis so that its position at any time is given by x(t) = 2t3 + 1. a. Find the acceleration of the particle at t = 0. b. Find the velocity of the particle when its acceleration is 0. c. Find the total distance traveled by the particle from t = 0...

*November 6, 2011*

**calculous**

I'm in AP calc. We still didn't learn what descartes rule is.. Can you be more explisive please?

*November 5, 2011*

**calculous**

3.Given the function f defined by f(x)=2x^3-3x^2-12x+20 a.Find the zeros of f b.Write an equation of the line perpendicular to the graph of f at x = 0 c. Find the x and y coordinates of all points on the graph of f where the line tangent to the graph is parallel to the x axis.

*November 5, 2011*

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