Identify growth or decay then describe its rate (r=%)

Y=e^-0.3t

Y=e^-0.3t would better be written as y = e^ (-0.3t), because you want to emphasize that the exponent of "e" is - 0.3t. Enclose the expon. within (), ps.

Since the expo is neg, this is expo. decay, and the rate is 0.3 per time period.

For example, if y is = to. 5 right now, the next value, after 1 time period, will be

.5 (.3) =.15.