The half life of substance A is 18 18 years, and substance B decays at a rate of 30 30 % each decade. (a) Find a formula for a function () f ( t ) that gives the amount of substance A, in milligrams, left after t years, given that the initial quantity was 100 100 milligrams.

Simplify each expression using the definition, identities, and properties of imaginary numbers. match each term in the list on the left to its equivalent simplified form on the right. 1. (i 3)2(-i 0)3(3i 2)4 -4 2. (i 3i -5)2(i 4i -3)0 1 3. (-i 4i 2)(2i)2(i -1i 5)3(i 0)-3 -i 4. i 3[(i 2i 3i 4)(i 0i 2i 5)]2 81