83. 11.4 yr
85. 40 hr
87. At 5% compounded yearly, A=$9849.70. At 4.75% compounded monthly, A=$9754.74. The 5% investment will provide the greater return.
89.
34 million
In 2206 (after 199.3 yr)
91.
≈5 hr
93. t=6.57 min
95.
5000 people / square mile
7459 people / square mile
≈ 13.73 miles
97. I=0.2322I0
99.
11.27 ft / sec
5.29 ft / sec
201
101.
1 g
Remains stationary at 6 g
4.6 days
103. 16 cents; yes, it is noticeable.
105. 4.0⋅10−3; 1585 times more
107. 100 times more intense
109. ≈9.7
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