Please help most people are getting concept wrong

At the beginning of a study, a certain culture of bacteria has a population of 20. The population grows according to a continuous exponential growth model. After 17 days, there are 52 bacteria. (a) Let t be the time (in days) since the beginning of the study, and let OIno y be the number of bacteria at time t. Write a formula relating y to t. X Use exact expressions to fill in the missing parts of the formula. Do not use approximations. y = De . (b) How many bacteria are there 22 days after the beginning of the study? Do not round any intermediate computations, and round your answer to the nearest whole number. bacteria