an exponential decay
the percent decay is 60%
Explanation:16) y = 3(0.4)^t
using the expontial function formula:
y = ab^t
if b > 1, it is an exponnetial growth
if b is greater than zero but less than 1, it is an exponential decay
b in the given function = 0.4
0.4 is is greater than zero but less than 1
Hence, it is an exponential decay
For exponential decay, Percent decay:
y= a(1-r)^x
r is the exponential percent decay
comparing both function:
a = 3
0.4 = 1 - r
r = 1 - 0.4
r = 0.6 = 60/100
Hence, the percent decay is 60%
