A scientist is growing cells in a petri dishWhich of the following equations could model the number of cells in the petri dish after x days? (1 point) y = 15 * (0.99) ^ x; y = 100 * (0.2) ^ x; y = 10 * (2) ^ x; y = (1/4) ^ x

y = 15 * (0.99) ^ x