A radioactive substance decays according to

MATHEMATICS · Single correct · AP · Calculus AB · Differential Equations · Differential Equations

Problem

\dfrac{dm}{dt}=-0.12m

. Approximately how many hours are required for the mass to drop to

35\%

of its initial value? (a)

3.6

(b)

8.7

(c)

5.4

(d)

8.2