(a) How much cubic feet of sand is removed from the beach by the wave pool over the 9 hour interval 0 ≤ t ≤ 8? (b) Is the amount of sand on the beach increasing or decreasing at t = 5? Justify your answer. (c) Write and equation A(t) for the total amount of sand for any time t. Find the amount of sand at the end of the day, t = 8.

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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(a) How much cubic feet of sand is removed from the beach by the wave pool over the 9 hour interval 0 ≤ t ≤ 8?

(b) Is the amount of sand on the beach increasing or decreasing at t = 5? Justify your answer.

(c) Write and equation A(t) for the total amount of sand for any time t. Find the amount of sand at the end of the day, t = 8.

(d) At what time t, 0 ≤ t ≤ 8, is the amount of sand on the beach a minimum? Justify your answer.

2. The rate at which sand is removed from the beach of a water park wave pool is modeled by the
function R, where R(t) = 300 sin ()
cubic feet per hour, t is measured in hours, and the park
is open for only 9 hours, 0 < t< 8. The water park adds sand throughout the day at a constant
rate modeled by S(t)
80 cubic feet per hour, for 0 <t< 8. There are 11,250 cubic feet of
sand at t = 0
Transcribed Image Text:2. The rate at which sand is removed from the beach of a water park wave pool is modeled by the function R, where R(t) = 300 sin () cubic feet per hour, t is measured in hours, and the park is open for only 9 hours, 0 < t< 8. The water park adds sand throughout the day at a constant rate modeled by S(t) 80 cubic feet per hour, for 0 <t< 8. There are 11,250 cubic feet of sand at t = 0
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