Final answer:
To find an equivalent form of the equation given, divide both sides of the equation by 0.0803 and simplify.
Step-by-step explanation:
An equivalent form of the equation 0.0803 A(t) = A (0.5) 0, where 4 represents the initial amount of the substance, can be found by dividing both sides of the equation by 0.0803:
A(t) = (A (0.5))/0.0803
This simplifies to:
A(t) = 49.84 A (0.5)