SOLUTION: Two boats leave a dock at the same time. One boat is headed directly east at a constant speed of 35 knots (nautical miles per hour), and the other is headed directly south at a c

Algebra ->  Expressions-with-variables -> SOLUTION: Two boats leave a dock at the same time. One boat is headed directly east at a constant speed of 35 knots (nautical miles per hour), and the other is headed directly south at a c      Log On


   



Question 153483: Two boats leave a dock at the same time. One boat is headed directly east at a constant speed of 35 knots (nautical miles per hour), and the other is headed directly south at a constant speed of 22 knots. Express the distance d between the boats as a function of the time t
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Two boats leave a dock at the same time. One boat is headed directly east at a constant speed of 35 knots (nautical miles per hour), and the other is headed directly south at a constant speed of 22 knots. Express the distance d between the boats as a function of the time t.
:
You can see that the boats' paths represent 2 sides of a right triangle
The distance between the two boats is represented by the hypotenuse
:
Let t = travel time of the boats:
:
one boat dist = 22t, the other boat dist = 35t
;
d = sqrt%28%2822t%29%5E2+%2B+%2835t%29%5E2%29
:
d = sqrt%28%28484t%5E2%29+%2B+%281225t%5E2%29%29
:
d = sqrt%281709t%5E2%29
:
d = 41.34t
:
:
Check solution with calc using t = 1 hr
Enter: sqrt%2822%5E2+%2B+35%5E2%29 = 41.34