Answer:
2.6 meters.
Step-by-step explanation:
5-0.9 is 4.1, minus 1.5 is 2.1.
1)3.8 *10¹⁵
2)4.0*10¹⁴
3)30.4*10⁻²⁰
4)523,000,000,000 atoms
5)0.000 000 000 000 000 000 000 000 00167