Bacteria in a petri dish is experiencing exponential decay. There are 1,000 bacteria at the start and 400 bacteria a day later.
1. The percent decrease is
percent, 2. and the decay factor is.
1. 60, 100, 40
2. 1.0, 0.4, 0.6
PLEASE HELP

Thompson and thompson is a steel bolts manufacturing company. their current steel bolts have a mean diameter of 127 millimeters, and a variance of 36. if a random sample of 35 steel bolts is selected, what is the probability that the sample mean would differ from the population mean by greater than 0.5 millimeters? round your answer to four decimal places.

Okay so i didn't get this problem petro bought 8 tickets to a basketball game he paid a total of $200 write an equation to determine whether each ticket cost $26 or $28 so i didn't get this question so yeahyou have a good day.

Steve had 48 chocolates but he decided to give 8 chocolats to each of his f coworkers. how many chocolates does steve have left