Answer:
A factor of 10,000
Step-by-step explanation:
To make this comparison, we must convert the measurements into the same units. I'll pick kg as the common unit.
The car has a mass of 1000kg.
The mouse is 100g, but we can convert that to kg by dividing by 1,000:
The conversion factor from g to kg is: (1 kg/1000g)
(100g)*(1kg/1000g) = 0.1 kg for the mouse.
Now we can compare the two masses:
(Mass car/mass mouse)
(1000kg)/(0.1kg) = 10,000 times larger (the car)