DN A chemical substance has a decay rate of 8.1% per day. The rate of change of an amount of the chemical after t days is given by
dt
= -0.081N.
a) Let No represent the amount of the substance present at t = 0. Find the exponential function that models the decay.
b) Suppose that 700 g of the substance is present at t = 0. How much will remain after 2 days?
c) What is the rate of change of the amount of the substance after 2 days?
d) After how many days will half of the original 700 g of the substance remain?
.
a) N(t) - No e -0.0810
b) After 2 days, I will remain.
(Round to the nearest whole number as needed.)