Suppose you could choose 2 boxes of markers. find all the possible pairs. 15 markers, 24 markers, 36 markers, 48 markers

There are 6 possible pairs

Step-by-step explanation:

You have 4 boxes, each one has 15 markers, 24 markers, 36 markers and 48 markers. You can choose 2 boxes, the combinations are:

15 markers & 24 markers

15 markers & 36 markers

15 markers & 48 markers

24 markers & 36 markers

24 markers & 48 markers

36 markers & 48 markers

Notice that, for example, 24 markers & 15 markers is already chosen, that is, the order doesn't matter.

step-by-step explanation:

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)