1
1
–
r
s
25 Express in simplest form:
r
2
–
1
s
2
26 Cities H and K are located on the same line of longitude and the
difference in the latitude of these cities is 9°, as shown in the accompa-
nying diagram. If Earth’s radius is 3,954 miles, how many miles north of
city K is city H along arc HK? Round your answer to the nearest tenth
of a mile.
H
9°
A
K
(Not drawn to scale)
[10]
Math. B – Aug. ’04