What is the orbital period of neptune in earth year?

30 earth years

164 earth years

3.8 x 10^11 earth years

2.3 x 10^17 earth years

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)

so then what are you asking?

step-by-step explanation: