Answer:
Step-by-step explanation:
Given that:
and 
If we equate both since they are distances, we have:
Algebraically, moving the equation to the right side, we get:

To factor the equation on the left side:

Factor out 2 on the left-hand side:


![= 2[t(t-1)-4(t-1)]](https://tex.z-dn.net/?f=%3D%202%5Bt%28t-1%29-4%28t-1%29%5D)

To determine the time when the two boats have to cover an equal distance:

Thus:

(16 + 15 -10 +4) = 25
25 squared is 625
Answer:
16m
Step-by-step explanation:
Answer:
10
Step-by-step explanation:
Rationalize the denominator by multiplying both the top and bottom by sqrt(5). you have sqrt(500) * sqrt(5) / sqrt(5)^2
simplifying we have 50/5 = 10
Step-by-step explanation:
By phythagorous theorem,
AC²=AB²+BC²
AC²=36+64
AC²=100
AC=root of 100
AC=10