Alex starts with a population of 1,000 amoeba that quadruples every hour for a number of hours, h. he writes the expression 1,000(4h) to find the number of amoeba after h hours. emma starts with a population of 1 amoeba that increases 40% every hour for a number of hours, h. she writes the expression (1 + 0.4)h to find the number of amoeba after h hours. use the drop-down menus to explain what each part of alex's and emma's expressions mean.