Please choose A, B, C, or D! Thank you :)

a culture of bacteria has an initial population of 2100 bacteria and doubles every 4hours. using the formula Pt = P0 2 t/d, where Pt is the population after t hours, P0 is the initial population, t is the time in hours and d is the doubling time, what is the population of bacteria in the culture after 11hours, to the nearest whole number? *************************** Which type of tax is taken out of each paycheck, and includes Medicare and Social Security taxes? What was the one or two reasons the colonists were willing to brave hostile Indians, diseases and starvation to come to an untamed and often harsh new word to start a new life?Please help For the circle do I find the circumference or area? Thats all. If some methane gas at 115 kPa and 33C is allowed to expand to 15.0dm^3 from 8.00 dm^3 when the temperature changed to 51.2 C. What pressure will the same amount of gas exert? 0.746 as a fraction pls help Pls help! I dont know what to put im horrible at patterns 1. Areas where seawater meet the freshwater from the rivers is also a home to variouskinds of animals. These areas are called estuaries. What services do estuaries provide?A. It provides area that is above water level at low tides and underwater at high tideB. It provides an active area of research because the communities are often welldefined and the common organisms.C. It provides vital nesting, breeding and feeding habitats for many species.D. It provides sediments in which organisms bury themselves. During the Progressive Era, voters were given more opportunities to select political party candidates through? Find the slope of the lineO 1/3O 6/20 -3/103/1 I need help with this!! QUESTION 42 poin4. What are the three areas in which a communication disorder may occur? Please find the square roots of the following complex number.[tex]z = 81(\cos(\frac{4\pi}{9})+i\sin(\frac{4\pi}{9}))[/tex] please help________^ Marcus went to a football game with $55. He bought his ticket at the door, 1 pointa pretzel for $3, ice cream for $5, and a bottle of water for $2. He decidedto buy a team hat for $20. When he left he had $3 left in his pocket. Howmuch did the ticket cost? * 4th time posting this, please help.. I'll give brainliest. (No bots) Galvin bought 3/5 as many non-fiction books as fiction books from a book fair. He read 6 non-fiction books and 13 fiction books. He then had 3/4 as many non-fiction books left to read as fiction books. How many books did Galvin buy altogether? sorry guys here my question please answer if you can thank you What phyla is this animal?PlatyhelminthesNematodaAnnelidaCnidarian