After a special medicine is introduced into a petri dish full of bacteria, the number of bacteria remaining in the dish decreases rapidly. The relationship between the elapsed time $t$, in seconds, and the number of bacteria, $N(t)$, in the petri dish is modeled by the following function: ###$N(t)=50{,}000\cdot (0.5)\^{\Large \frac{t}{4.3}}$ **Complete the following sentence about the rate of change in the number of bacteria.** The Petri dish loses $50\%$ of bacteria every [[☃ numeric-input 1]] seconds.