Question 258807
Two ships leave the same harbor at the same time. 
The first ship heads north at 20 miles per hour and the second ship heads west at 15 miles per hour.
 Write an expression that gives the distance d between ships after t hours.
:
This is a pythag problem: c^2 = a^2 + b^2 or
c = {{{sqrt(a^2+b^2)}}}
a = dist traveled in t hrs of the 1st ship
b = dist traveled in t hrs by 2nd ship
c = dist between the two ships after t hrs (d)
;
Dist = speed * time (t)
:
d = {{{sqrt((20t)^2 + (15t)^2)}}}
d = {{{sqrt(400t^2 + 225t^2)}}}
d = {{{sqrt(625t^2)}}}
d = 25t is the distance between the ships after t hrs