To what decimal place should each answer be rounded? How many significant figures does the rounded answer have? A. 9 cm+2.8 cm=11.8 cm(unrounded)

After rounding, the number should be reported to the

ones place.

tenths place.

hundredths place.
Thus, the number has

3 significant figures.

2 significant figures.

1 significant figure.

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.

shield volcanos are angry and get mad over the smallest things so much that there heads erupt   pahoehoe and a'a lava. a composite volcano is the poller opposite of a shield volcano. its   peaceful thing and knows how to control its emotions.