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.

how many players are there?

step-by-step explanation:

so far i think you have the right thing going for you just remember soh cah toh

step-by-step explanation:

sine over hypotenuse

cosine   equals adjacent

tangent over hypotenuse