the tunnel shown here. The tunnel is 400 ft long and 60 ft wide at the base. The crossed section is shaped like one arch of the curve y = 30 cos(). Upon completion, the TX 60 tunnel's inside surface (excluding the roadway) will be treated with a waterproof sealer that costs $1.75 per square foot to

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Your newly formed engineering firm is competing to bid for a contract to construct the tunnel shown here. The tunnel is 400 ft long and 60 ft wide at the base. The cross-section is shaped like one arch of the curve \( y = 30 \cos \left( \frac{\pi x}{60} \right) \). Upon completion, the tunnel's inside surface (excluding the roadway) will be treated with a waterproof sealer that costs $1.75 per square foot to apply. How much will it cost to apply the sealer? Use Simpson's Rule to find the length of the cosine curve with less than 0.001 error. Show how you determine the number of intervals, \( n \), you decide to use.

**Diagram Description:**

The diagram illustrates a cross-section of the tunnel shaped as the curve \( y = 30 \cos \left( \frac{\pi x}{60} \right) \). It shows the curve extending from \( x = 0 \) to \( x = 60 \), reaching a maximum height of 30 ft at \( x = 0 \), and has a width of 60 ft at the base. The shaded region represents the surface area to be sealed. The diagram is labeled "NOT TO SCALE" and represents the geometric shape of the tunnel's cross-section.
Transcribed Image Text:Your newly formed engineering firm is competing to bid for a contract to construct the tunnel shown here. The tunnel is 400 ft long and 60 ft wide at the base. The cross-section is shaped like one arch of the curve \( y = 30 \cos \left( \frac{\pi x}{60} \right) \). Upon completion, the tunnel's inside surface (excluding the roadway) will be treated with a waterproof sealer that costs $1.75 per square foot to apply. How much will it cost to apply the sealer? Use Simpson's Rule to find the length of the cosine curve with less than 0.001 error. Show how you determine the number of intervals, \( n \), you decide to use. **Diagram Description:** The diagram illustrates a cross-section of the tunnel shaped as the curve \( y = 30 \cos \left( \frac{\pi x}{60} \right) \). It shows the curve extending from \( x = 0 \) to \( x = 60 \), reaching a maximum height of 30 ft at \( x = 0 \), and has a width of 60 ft at the base. The shaded region represents the surface area to be sealed. The diagram is labeled "NOT TO SCALE" and represents the geometric shape of the tunnel's cross-section.
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