ana maria are 43 de timbre in trei clasoare. din primul pune 4 in al doiilea si 4 in al 3 lea. in primul clasor vor ramna de doua ori mai putine timbre si cu 3 mai putine decat in al 3 lea clasor. cate timbre sunt in fiecare clasor? repde va rog, mai am o ora la dispozitie :

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)

the answer is simply just 6n add the two together as they have an n

cant open file sorry!

step-by-step explanation:

the answer is

d.

5.3066 m2

step-by-step explanation: