Respuesta :

Answer:

d  So y = 10 (.5)^x   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