3 ml dose of a drug is injected into a patient steadily for 0.4 seconds. At the end of this time, the quantity, Q, of the drug in the body starts to...

A 0.3 ml dose of a drug is injected into a patient steadily for 0.4 seconds. At the end of this time, the quantity, Q, of the drug in the body starts to decay exponentially at a continuous rate of 0.35 percent per second. Using formulas, express Q as a continuous function of time, t, in seconds.