2
28 Express, in simplest a + bi form, the roots of the equation x
+ 5 = 4x.
29 A ship at sea is 70 miles from one radio transmitter and 130 miles
from another. The angle between the signals sent to the ship by the
transmitters is 117.4°. Find the distance between the two trans-
mitters, to the nearest mile.
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Math. B – Aug. ’03