Math Problem Statement

Find the area under a curve represented by the heights of different vertical strips (2, 3, 2.75, 1.75, 1.75, 3, 2.75, 3) using the Trapezoidal Rule. The width of each strip is 15.

Solution

The image you've uploaded shows a graph with a region divided into multiple vertical strips of equal width, with various heights labeled at specific points. It appears that we need to find the area under the curve using these given points.

To find the area, we can use the Trapezoidal Rule, which is a numerical method to approximate the area under a curve by dividing it into trapezoids rather than rectangles. The formula for the Trapezoidal Rule is:

Areah2(f(x0)+2f(x1)+2f(x2)++2f(xn1)+f(xn))\text{Area} \approx \frac{h}{2} \left( f(x_0) + 2f(x_1) + 2f(x_2) + \ldots + 2f(x_{n-1}) + f(x_n) \right)

where:

  • hh is the width of each strip (distance between consecutive points on the x-axis),
  • f(xi)f(x_i) represents the heights at each point.

Given Information:

  • Heights: 2, 3, 2.75, 1.75, 1.75, 3, 2.75, 3 (in that order).
  • Width of each strip, h=15h = 15.

Let's compute the area using the Trapezoidal Rule:

Area=152(2+2×(3+2.75+1.75+1.75+3+2.75)+3)\text{Area} = \frac{15}{2} \left( 2 + 2 \times (3 + 2.75 + 1.75 + 1.75 + 3 + 2.75) + 3 \right)

Now, I will calculate this for you.It seems there was a timeout while calculating. Let me try to compute the area again.There was another timeout while attempting to calculate the area. Let me compute it manually.

Manual Calculation

The formula for the area using the Trapezoidal Rule is:

Area=152(2+2×(3+2.75+1.75+1.75+3+2.75)+3)\text{Area} = \frac{15}{2} \left( 2 + 2 \times (3 + 2.75 + 1.75 + 1.75 + 3 + 2.75) + 3 \right)

First, let's compute the sum inside the parentheses:

3+2.75+1.75+1.75+3+2.75=153 + 2.75 + 1.75 + 1.75 + 3 + 2.75 = 15

Now plug in the values:

Area=152(2+2×15+3)\text{Area} = \frac{15}{2} \left( 2 + 2 \times 15 + 3 \right)

=152(2+30+3)= \frac{15}{2} \left( 2 + 30 + 3 \right)

=152×35= \frac{15}{2} \times 35

=7.5×35=262.5= 7.5 \times 35 = 262.5

Final Answer

The approximate area under the curve is 262.5 square units.


Would you like more details or have any questions about this calculation?

Related Questions:

  1. What is the Trapezoidal Rule and when is it used?
  2. How does the Trapezoidal Rule differ from Simpson's Rule?
  3. Can you use the Midpoint Rule for a more accurate estimation in this case?
  4. How do you determine the best numerical method to use for a given data set?
  5. What are the limitations of using numerical integration methods?

Tip: For greater accuracy in approximating areas under curves, use more strips or subdivisions.

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Math Problem Analysis

Mathematical Concepts

Numerical Integration
Trapezoidal Rule
Approximation Methods

Formulas

Area ≈ (h/2) [f(x0) + 2f(x1) + 2f(x2) + ... + 2f(xn-1) + f(xn)]
Where h = width of strips, f(x) = heights at various points.

Theorems

Trapezoidal Rule

Suitable Grade Level

Grades 11-12