Which expression is equivalent to (0.35z - 0.4)- (0.9z - 0.35)

A. 0.55z-0.05
B.0.55z+0.75
C. -0.55z - 0.05
D. - 0.55z+0.75

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)

48 / 6 = x

in this case, x will equal the amount of money in each card!

x therefore will be 8.

trent had $8 in each birthday card.

i think u have 12 apples sorry again i don't really know if it correct i'm just tryna hrlp people out.