es 人
~ Ar Traffic Control An air traffic controller Spots
two airplanes at the same altitude converglng to apoint
as 負ey 各y at right angles to eachi GOther. One airplane
IS 240 kilometers from fthe polnt and has a speed Qft
/20 lometers per hour. The other js 320 kilometers from
世e polnft and has a speed of 960 kilometers per hour.
(a) Atf what rate is the distance between the planes
changing? 一2go 三衝 久-
(5D) 本ow mucfh fime does tbe controller have to get one
Of 鍋e alrplanes on a different tght path? 2ouoy
22. Advertising C
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