1. A biologist observes 3 cells. At the end of the first hour, each cell divides into 4 cells. At the end of the second hour, each of those cells divides into 4 more cells, quadrupling each hour. a. If this pattern continues, how many cells will there be at the end of the third hour
b. Write an explicit formula that models the behavior of the cells.​

This is a table of values that follows a given rule or function. each output comes from the input being applied to the rule.

Fran would like to estimate the mean amount of time it takes people in her town to travel to work. the town's population is 150,000 and about 90,000 of those are working adults. which statements are true? select each correct answer. there is no way to infer the value of the mean. she must collect data for all 90,000 working adults and calculate the mean. a larger sample of working adults will provide a better estimate of the true mean than a smaller sample. the population of working adults is too large for using a sample to estimate the mean of the entire group. if she takes a random sample of the population of working adults in her town, the mean for that group is likely close to the mean for the entire group.

At the electronics store you have a coupon for 20% off up to 2 cds you buy for cds with the original cost of $10.99 each the sales tax is 5% what is the total cost of your purchase