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## Homework Statement

A hotel elevator ascends 200m with maximum speed of 5m/s. Its acceleration and deceleration both have a magnitude of 1.0m/s^2

How far does the elevator move while accelerating to full speed from rest?

## Homework Equations

## The Attempt at a Solution

delta s = (5m/s)^2 / 1.0m/s^2

= 12.5m

but heres the thing confusing me about rounding.

The values given were written as 5m/s and 1.0m/s^2

When dividing (or multiplying) I thought we use the same number of sig-figs as the value with least amount of sig-figs, which would be "5"

But the answer is 12.5 --three sig-figs. I dont understand why.

Please help thanks