# Posts by REALLY NEED HELP!!!!

Total # Posts: 22

**Math: Calculus**

You are given the four points in the plane A = (5,-6), B = (9,1), C = (14,-6), and D = (19,2). The graph of the function f(x) consists of the three line segments AB, BC and CD. Find the integral f(x)dx from 5 to 19 by interpreting the integral in terms of sums and/or ...

*November 17, 2010*

**Math: Calculus**

Estimate the area under the graph of f(x)=x^2+2x from x = 4 to x = 10 using 3 approximating rectangles and left endpoints. I got 290.25 as my answer but it's wrong. Would someone explain to me how to answer this question.

*November 12, 2010*

**Math: Calculus**

Estimate the area under the graph of f(x)=3x^3+5 from x=-1 to x=4, first using 5 approximating rectangles and right endpoints, and then improving your estimate using 10 approximating rectangles and right endpoints. I'm having problem with using the midpoint to find the ...

*November 12, 2010*

**Math: Calculus**

Never mind i got it.

*November 11, 2010*

**Math: Calculus**

That's the problem. I have no idea. The question is exactly like i posted it here. I did the same thing but i realized i wasn't given a value of what it should equal to. I was hoping there a different way of solving this problem

*November 11, 2010*

**Math: Calculus**

The velocity function is v(t)= t^2-5t+ 4 for a particle moving along a line. The position function s(t) is an antiderivative of the velocity function. Find the displacement, s(6) - s(-3), by the particle during the time interval [-3,6].

*November 11, 2010*

**Math: Calculus**

The velocity of a car is f(t)=7t meters/second. Use a graph of f(t) to find the exact distance traveled by the car, in meters, from t = 0 to t = 10 seconds

*November 10, 2010*

**Math: Calculus**

Consider the function f(x) whose second derivative is f''(x) = 8x + 4sin(x). If f(0) = 2 and f'(0) = 2, what is f(x)? I got... f'(x)=4(x^2 - cos[x]) and f(x)=(4(x^3 - 3sin[x]))/3 but it's wrong. Can anyone explain to me how to solve this.

*November 10, 2010*

**Math: Calculus**

I don't know why but the answer is wrong.

*November 10, 2010*

**Math: Calculus**

Given f''(x) = 4x - 3 and f'( -3) =2 and f( -3)=-1. Find f'(x) =______ and find f( 1) =_____

*November 10, 2010*

**Math: Calculus**

Can someone help me out here with these two problem? I have know idea where to start. 1)The equation: 10(x-1)(x-2)(x-3)=1, has three real solutions a<b<c where a=____, b=___ , and c=___. Enter your answers with at least six correct digits beyond the decimal point. Hint: ...

*November 4, 2010*

**Math: Calculus**

This website doesn't help me in solving my question.

*November 4, 2010*

**Math: Calculus**

The equation: 10(x-1)(x-2)(x-3)=1, has three real solutions a<b<c where a=____, b=___ , and c=___. Enter your answers with at least six correct digits beyond the decimal point. Hint: Ask what the solutions are if the right hand side is 0 instead of 1, and use Newton'...

*November 4, 2010*

**Math: Calculus**

This website doesn't help me in solving my question.

*November 4, 2010*

**Math: Calculus**

Find the smallest positive value of which satisfies -- x=4.100cos(2.800x) Give the answer to four places of accuracy._________ Remember to calculate the trig functions in radian mode.

*November 4, 2010*

**Math: Calculus**

f(x)=(x^3)/(x^2-36)

*November 3, 2010*

**Math: Calculus**

Answer the following questions for the function f(x) = \frac{ x^3 }{ x^2 - 36 } defined on the interval [ -20, 16 ]. A. The function f(x) has vertical asympototes at____ and___ B. f(x) is concave up on the region___ to and____ to___ C. The inflection point for this function is...

*November 3, 2010*

**Math: Calculus**

I manage to get to that point but maximizing it is the problem.

*October 29, 2010*

**Math: Calculus**

A cylinder is inscribed in a right circular cone of height 3.5 and radius (at the base) equal to 7. What are the dimensions of such a cylinder which has maximum volume?

*October 29, 2010*

**Math: Calculus**

I actually got 10.811 ft

*October 29, 2010*

**Math: Calculus**

THANKS YOU Reiny!!! You are a great help. Turns out my "y" was wrong but I did get the "x"

*October 29, 2010*

**Math: Calculus**

A fence 6 feet tall runs parallel to a tall building at a distance of 2 feet 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?

*October 29, 2010*

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