Answer:
The boat's velocity relative to Earth is 3.91 m/s.
Explanation:
Given;
speed of ferry due north,
= 2.5 m/s
speed of the river to the east,
= 3.0 m/s
The boat's velocity relative to Earth is given by;

Therefore, the boat's velocity relative to Earth is 3.91 m/s.
==> Their sum is a wave with amplitude greater than either of
the original waves . . . Constructive interference
==> Their sum is a wave with amplitude less than either of
the original waves . . . Destructive interference
Answer:
the answer would be "using more heat" btw
Explanation:
The answer would be Estrogen, because that is a female sex hormone