What do significant figures in a measurement

The significant figures in a measurement include:

 All digits measured exactly,

One estimated digit.

Significant figures can help us show the preciseness of a number.

answer: the direction of the wind is expressed as the direction from which the wind is blowing. for example, easterly winds blow from east to west, while westerly winds blow from west to east.

explanation:

the first american roller coaster was the mauch chunk switchback railway, built in the mountains of pennsylvania in the mid-1800s. the track, originally built to send coal to a railway, was reconfigured as a "scenic tour."