Answer
A)
UPPER ESTIMATE =758 GAL
lOWER ESTIMATE = 543 gal
b)
upper estimate=2363 gal
Lower Estimate=1693 gal
c)
worst case=31.4
best case=32.4
Work Step by Step
Since the leakage is increasing, an upper estimate uses right endpoints and a lower estimate uses left endpoints:
(a) upper estimate (70)(1) (97)(1) (136)(1) (190)(1) (265)(1)= 758 gal,
lower estimate (50)(1) (70)(1) (97)(1) (136)(1) (190)(1) = 543 gal.
(b) upper estimate (70 97 136 190 265 369 516 720) = 2363 gal,
lower estimate (50 70 97 136 190 265 369 516) = 1693 gal.
(c) worst case: 2363 720t 25,000 t =31.4 hrs;
best case: 1693 720t 25,000 t= 32.4 hrs
