–5(–2–8m)=10+5m
Show step by step

m=0

Step-by-step explanation:

-5(-2-8m)=10+5m

distribute, 10+40m=10+5m

move all variables to one side of the equation, 35m = 0,

m = 0

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)