Can someone help me with number 16?

Step-by-step explanation:

if we take from south to north as y-axis,west to east as x-axis.

Then position of helicopters are (-20,0) and (15,-15)

a.d=√((15+20)²+(-15-0)²)=√(1225+225)=√1500=10√15

b.

origin is place of rally.

one helicopter is 20 miles south of rally.

other helicopter is at distance=√(15²+15²)=15√2 miles SE of rally.

c.

time taken by first helicopter=(20/80)×60=15 minutes

second helicopter takes time=(15√2/80)×60=(45√2)/4≈15.91 minutes.

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step-by-step explanation:

all the angles opposite to the angle 150 would be 150 and all the angles that are next to 150 are 30 because they equal 180 it you add it up.

step-by-step explanation: