Store e offers a book that karen wants for 20% off its regular price of $15.00. store f sells the same book for $15, before a $3.00 mail-in rebate. where should karen purchase the book? explain your reasoning. (be sure to consider the cost of postage, as well as the time and effort required to mail in the rebate request in your response.)

Colby and jaquan are growing bacteria in an experiment in a laboratory. colby starts with 50 bacteria in his culture and the number of bacteria doubles every 2 hours. jaquan starts with 80 of a different type of bacteria that doubles every 3 hours. let x equal number of days. colbys experiment follows the model: a.) y=50*2^x b.) y=50*2^8x c.) y=50*2^12x jaquans experiment follows the model: a.)80*2^x b.)80*2^8x c.)80*2^12x

State if the two triangles are congruent. if they are, state how you know?

Is this a polynomial function? i need to know asap