# Hello, I am Kaito from Japan. I would like to ask about significant digits.

Question [A car is traveling along a straight road at a constant velocity of 20 m/s. The driver depresses the accelerator, and the velocity of the car changes to 35 m/s in the next ten seconds. Calculate the acceleration of the car.]

The answer would be 1.5m/s², correct? but 20m/s is two significant digits. so is it better to answer 2m/s²?

Thank you so much