so yes i'm re-posting this same question since last time no one answered it for me so this time somebody please help me out :(

its 30

Step-by-step explanation:

if you see the x is in the middle of the line meaning its 30

30 is your answer hope it helps you to

the answer is d

step-by-step explanation:

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)