Question

PLEASE HELP ME I WILL MARK YOU BRAINLIST

Answer 1

Answer:

C

Step-by-step explanation:

It's because Magnesium-27 is 8 hours which makes the 300/8=37.5

Answer 2

Answer:

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