Answer:
D. By adding the vectors

Explanation:
Given
Represent the velocity of the river current as VR

Represent the velocity of the boat as VB

Required
How to calculate the velocity of boat relative to river current
From the question, we understand that both move in the same direction.
So, the relative velocity V is calculated as:



Notice that the both velocities are added together to get the relative velocities.
This is so because they both move in the same direction
<em>From the list of given options, only option D is correct.</em>
Answer:
It would be necessary to focus on the objective information, and also to separate the influence of the present cultural environment from the past events.
Explanation:
In the study of past events, it would be necessary to take into account the idea of being objective towards the information about historical events. Since, it is known that the perception of the present surrounding environment and the social interaction lived by the researcher, could affect the study of past events,. It would be important to draw a line in order to separate the information corresponding to each epoch of time without modifying history by the influence of the present.
True. The most successful was the Massachusetts Bay Colony, established by the Puritans...
Source of information: http://thehistoryjunkie.com/new-england-colonies/
Explanation:
academic study or science that deals with human behavior in its social
C. a sense of achievement