A river flows at 2.50 m/s to the north, while a boat travels from south to north with a
constant velocity of 12.5
m/s relative to the water.
What is the velocity of the boat relative to an
observer at rest on the shore?

15 m/s towards the North

Explanation:

we need to add both velocities to find the effective velocity from the point of view of an observer at rest on the shore:

2.5 m/s + 12.5 m/s = 15 m/s pointing North

c. 7/3

step-by-step explanation:

a rational number is like pi- it is a repeating decimal.

a. is -1.8

b. 2.236068

c. 2.3333333333333333333

d.   is 3

i hope that ! =)