Answer:
Boat speed = 75 miles/ h
Current speed = 25 miles/ h
Step-by-step explanation:
Remember that:
Where
s is the speed
d is the distance
t is the time.
If we call s the speed of the boat and we call c the speed of the current, then we have to:
Boat speed downstream (Boat speed in the same direction as river speed):
Where:
Boat speed upstream (Boat speed in the opposite direction than the river speed):
Where:
Then we have the following system of equations:
(1)
(2)
Add equation (1) with equation (2) and solve for s:
Now substitute s in equation (2) and solve for c
Finally
Boat speed = 75 miles/ h
River speed = 25 miles/ h
to get the the equation of any straight line, we only need two points off of it, let's use the two points already in the picture.
A=pi(r)^2
So A= 3.14(13)^2
A=530.66
Answer:
7
Step-by-step explanation:
15/2 = 7.5
you can't but half a figure so its 7