Need help.

I. Cbf is the same answer as bcf which is 2x is 30 so it's 30x2 60 ll. Measure with a prtracter I guess iii. 30

answear:

a

step-by-step explanation: a

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)