Answer:
B
Step-by-step explanation:
We have to know divide the total meters that has been traveled by the tortoise which is for 4.8 meters to the time it was completed which is 3 minutes. The formula for speed is: [ speed = distance/time ]. So the equation will be 4.8 meters/3 minutes = 1.6 meters per minute. The speed of the tortoise is 1.6 meters per minute.
Only 4 because result is (x-4)(x-4) that means (x-4)^2=0
So
X-4=0
X=4