The amount of bacteria that triples every hour can be modeled with B(t)= 8000(3)^t where B(t) is the number of bacteria in the Petri dish and t is the time in hours. How many bacteria were there in the beginning? (This is with 'Creating Exponential Equations') someone please help if you understand how to do this. PLEASE SOMEONE

Assume that females have pulse rates that are normally distributed with a mean of mu equals 72.0 beats per minute and a standard deviation of sigma equals 12.5 beats per minute. complete parts (a) through (c) below. a. if 1 adult female is randomly selected, find the probability that her pulse rate is between 65 beats per minute and 79 beats per minute. the probability is? b. if 16 adult females are randomly selected, find the probability that they have pulse rates with a mean between 65 beats per minute and 79 beats per minute. the probability is? c. why can the normal distribution be used in part (b), even though the sample size does not exceed 30?