Assignment:
Q1. The following table gives world oil consumption, in billions of barrels per year. Estimate total oil consumption during this 25-year period.
|
Year
|
1980
|
1985
|
1990
|
1995
|
2000
|
2005
|
|
Oil (bn barrels/year)
|
22.3
|
21.3
|
23.9
|
24.9
|
27.0
|
29.3
|
Q2. Roger runs a marathon. His friend Jeff rides behind him on a bicycle and clocks his speed every 15 minutes. Roger starts out strong, but after an hour and a half he is so exhausted that he has to stop. Jeff's data follow:
|
Time since start (min)
|
0
|
15
|
30
|
45
|
60
|
75
|
90
|
|
Speed (mph)
|
12
|
11
|
10
|
10
|
8
|
7
|
0
|
A. Assuming that Roger's speed is never increasing, give upper and lower estimates for the distance Roger Ran during the first half hour.
B. Give upper and lower estimates for the distance Roger ran in total during the entire hour and a half.
Provide complete and step by step solution for the question and show calculations and use formulas.