The speed upstream is the difference between the boat speed and the current speed. It is (12 mi)/(4 h) = 3 mph.
The speed downstream is the sum of the boat speed and the current speed. It is (32 mph)/(4 h) = 8 mph.
The speed of the boat is the average of these: (3 + 8)/2 = 5.5 mph.
The speed of the current is that less the difference: 5.5 - 3 = 2.5 mph.
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<u>Check</u>
Boat + Current = 5.5 + 2.5 = 8 mph
Boat - Current = 5.5 - 2.5 = 3 mph
Answer:
going by 2
Step-by-step explanation:
Answer:
= sqrt(53)
Step-by-step explanation:
|7-2i| means find the distance
d = sqrt(real part^2 + imaginary part^2)
= sqrt(7^2 + (-2)^2)
= sqrt(49+4)
= sqrt(53)
The third term is ^5
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