How to find a unit rate from a table

In order to find a unit rate, the second part of the ratio must equal one. For example, let's say we want to find the ratio of 10/5. The second part of the ratio is 5. To get from 5 to 1, we must divide by 5. 5 / 5 = 1. However, what you do to the second part, you do to the first part. 10 / 5 = 2. The unit rate is 2:1.

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

hope this ! ^w^

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)