PLEASE HELP ME I WILL MARK YOU BRAINLIST

37.5

Step-by-step explanation:

if it decreases by 1/2 every 8 hours;

( 3×8= 24)

the first 8 hours 1/2×300 =150 gram

the second 8 hours(16 hours) = 1/2×150=75 gram

the third 8 hours(24 hours) = 1/2×75= 37.5gram

ruth is 6 years old

step-by-step explanation:

6 + 24 = 30,   so 6/30 = .2  

if you do 1/5 it also equals .2, so that is the answer.

relating to or denoting a system of numbers and arithmetic based on the number ten, tenth parts, and powers of ten.

it alot will look like this 4.4