Question

Please help! It’s a mathematical question.

Answer 1

Step-by-step explanation:

a) remaining = 8 × 2^(-t/12)

b) 1=8 × 2^(-t/12)

2^(-t/12) =1/8

2^(-t/12) = 2^(-3)

t/12 = 3

t = 12 × 3

= 36 hours