Sodium-24 has a half-life of 15 hours.
how many grams of a 900 g sample will remain after 90 hours?
a) 7.03125 g
b) 7.5 g
c) 14.0625 g
d) 28.125 g

The amount left after 90 hours is 14.0625 g

Step-by-step explanation:

This is the case of an exponential decay of Sodium-24. The function for exponential decay is,

where,

y(t) = amount left after time t

a = initial amount = 900 g

r = rate of decay = 0.5 (as the sample is getting halved each time)

t = number of periods = (as we have to convert the period in terms of half lives)

Putting the values,

i dont know sorry

step-by-step explanation:

me! what did you put for this question?

step-by-step explanation: