Answer
a)3490 feet $\approx$ 0.66 miles
b) 3840 feet $\approx$ 0.73 miles
Work Step by Step
a. left-endpoint values.
D (0)(10) (44)(10) (15)(10) (35)(10) (30)(10) (44)(10) (35)(10) (15)(10) (22)(10)(35)(10) (44)(10) (30)(10) 3490 feet $\approx$ 0.66 miles
b. right-endpoint values.
(b) D (44)(10) (15)(10) (35)(10) (30)(10) (44)(10) (35)(10) (15)(10) (22)(10) (35)(10)(44)(10) (30)(10) (35)(10) 3840 feet $\approx$ 0.73 miles