Answer:
Step-by-step explanation:

Answer:
b
Step-by-step explanation:
Answer:
-615.12
Step-by-step explanation:
hope this helps
plz mark as brainliest!!
Are there any options for us to choose or is there none because I could do it backward
Step-by-step explanation:
1 septillion = 10^6 nonillion
the taking time = 5× 10^-6 / 257.21
= 500× 10^-8 /257.21
= 1.94 × 10^-8 seconds