Consider the three roads, where the length of Road 1 is 320 feet. What is the approximate length of Road 3? A. 118.7 feet B. 232
.9 feet C. 439.6 feet or D. 862.5 feet
1 answer:
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For each <em>x</em> in the interval 0 ≤ <em>x</em> ≤ 5, the shell at that point has
• radius = 5 - <em>x</em>, which is the distance from <em>x</em> to <em>x</em> = 5
• height = <em>x</em> ² + 2
• thickness = d<em>x</em>
and hence contributes a volume of 2<em>π</em> (5 - <em>x</em>) (<em>x</em> ² + 2) d<em>x</em>.
Taking infinitely many of these shells and summing their volumes (i.e. integrating) gives the volume of the region:
Answer:
I would assume you're referring to this test? if so the answer is
a, d and e
