Question

HELPhelp ASAP)If a substance has a half-life of 45 days, how much of the original substance would be left after 90 days?

A.One half (1/2)
B.One quarter (1/4)
C.One eighth (1/8)
D.One tenth (1/10)

Answer 1

B : One quarter (1/4 )

Answer 2

B.

Step-by-step explanation:

if it is half life at 45 it is 1/4 at 90