Answer:
d. the 10 is the initial amount of the sample at the time it was discovered
Step-by-step explanation:
When we have an equation of the form
y = ab^x
a is the initial value at time x=0
b is the growth (or decay ) factor
and x is the time
So y = 10 (.5)^x the 10 is the initial amount of the sample at the time it was discovered
