Answer
a.
$ h=5280\tan\theta$ (ft)
b.
Fill the table with
1922, 9145, 29944, 60351
Work Step by Step
a.
From the diagram in the book, we see a right triangle with legs
1 mi=5280 ft adjacent to $\theta$,
h opposite to $\theta$
So,
$\displaystyle \tan\theta=\frac{h}{5280} \ \Rightarrow\ h=5280\tan\theta$ (ft)
b.
$ h=5280\tan 20^{o}\approx$1921.76283693
$ h=5280\tan 60^{o}\approx$9145.22826396
$h=5280\tan 80^{o}\approx $29944.3680076
$ h=5280\tan 85^{o}\approx$60350.6761586
Fill the table with
1922, 9145, 29944, 60351
