non-zero digits are always significant.
any zeros between two significant digits are significant.
a final zero or trailing zeros in the decimal portion only are significant.
keeping the body healthy and exercise. also take centrum advance. charot
when a volcano erupts, it's spewing forth lava, ash, and hot rocks. stratovolcanoes, the largest kind of volcano, can have entire networks of volcano conduits inside them, and they can have eruptions from the central crater at the top, or from volcanic vents on the side.