The daily discharge of the Spokane River as it flows through Spokane, Washington, in April and June
Question:
The daily discharge of the Spokane River as it flows through Spokane, Washington, in April and June is modeled by the functions
r1(t) = 0.25t2 + 37.46t + 722.47 (April) and
r2(t) = 0.90t2 - 69.06t + 2053.12 (June),
where the discharge is measured in millions of cubic feet per day and t = 1 corresponds to the first day of the month (see figure).
a. Determine the total amount of water that flows through Spokane in April (30 days).
b. Determine the total amount of water that flows through Spokane in June (30 days).
c. The Spokane River flows out of Lake Coeur d’Alene, which contains approximately 0.67 mi3 of water. Determine the percentage of Lake Coeur d’Alene’s volume that flows through Spokane in April and June.
Step by Step Answer:
Calculus Early Transcendentals
ISBN: 978-0321947345
2nd edition
Authors: William L. Briggs, Lyle Cochran, Bernard Gillett