Salena has twice as many DVDs as Jolene, and Jolene has one third as many as Brodie. What fraction of the total DVDs has Salena?

1/3

Step-by-step explanation:

Assume Jolene's DVDs are x.

Selena has twice as many DVDs as Jolene so Selena has 2x DVDs.

Jolene has 1/3 as many DVDs as Brodie which means that Brodie has 3 times as many DVDs as Jolene which is 3x.

Total DVDs = x + 2x + 3x

= 6x

Salena has 2x.

Fraction = 2x/6x

= 1/3

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)

34

step-by-step explanation: