Answer:
The distance is minimized 22 minutes after 3:00 pm.
Step-by-step explanation:
Let t is the time for the 2 boats after 3:00 pm, we have the distance of:
- Boat 1: 20t
- Boat 2: 15t and its distance to the dock is given by (15-15t)
The paths of the boats form a right triangle, in which the hypotenuse (also the distance between the two boats) is:
D = (20t)² + (15 - 15t)²
<=> dD/dt = -2(15² )( 1-t ) +2 × 20² × t
<=> dD/dt = 2 (15² + 20²) × t -2 ( 15 )² = 0
<=> t = 2 ( 15 )² : 2 (15² + 20²)
<=> t = 0.36 hours = 0.36 × 60 = 21.6 minutes ≈ 22 minutes
Therefore, the distance is minimized 22 minutes after 3:00 pm.
Hey there,
So explain and to illustrate (how

is the midpoint of

and the length of

is 23.8 what is the length of

<span>
A-----------------
B----------------
C
</span>
So,

in the problem here is to be considered the (Whole area of this line).

is the whole thing.
So, what we do in this problem, we do
. . .
23.8 ÷ 2 because we need to find what is

, so we will find the one half of it, which in this illustration is to be considered

23.8 ÷ 2 =


Hope this helps.
~Jurgen
The area of the right triangle =

b = base = SV = 12.3
h = hight = HL = 24.6
A = area

Answer:
If you round the answer, you'll get 4000