Which of the following shows the number 0.00270 written in scientific notation and keeping only the significant figures?

2.7× 10-3

2.7 × 103

2.70 × 10-3

0.27 × 10-2

0.003

0.270 × 10-3

Third option since their are 3 significant figures and that’s the only one written in proper scientific notation with the correct amount of significant figures

Answer: the philippines has suffered from an inexhaustible number of deadly typhoons, earthquakes, volcano eruptions and other natural disasters. this is due to its location along the ring of fire, or typhoon belt – a large pacific ocean region where many of earth's volcanic eruptions and earthquakes occur.

H=   2(area/a+b)h= 2(144/a+b)h= 2(144/18+18)h= 2(144/36)h= 2(4)h=8