Do Now: It’s the zombie apocalypse. Using awesome flamethrowers, Mr. Tamhane can “kill” a zombie in 4 minutes, while Mr. Lopez can “kill” a zombie in 3 minutes. They fight together for 12 minutes before Mr. Lopez gets bitten and turns into a zombie himself. A) If there are initially 100 zombies, how many do Mr. Tamhane and Mr. Lopez “kill” in the first 12 minutes? B) How many zombies are “alive” after 12 minutes? C) How long will it take Mr. Tamhane to finish off the zombie mob?
Bill can build a house in 15 days and Ted can build one in 20 days Bill can build a house in 15 days and Ted can build one in 20 days. They work together for 5 days after which Bill leaves. How much longer will it take for Ted to finish the job? Together: How much is left to build?
A tank can be filled with gas by one nozzle in 35 minutes A tank can be filled with gas by one nozzle in 35 minutes. However, 10 minutes after the nozzle is turned on, a second nozzle is also turned on, and both fill the tank after another 8 minutes pass. If only the second nozzle was used, how long would the entire task have taken?
Mr. Tamhane was writing the acuity exam (taking place November 22nd) Mr. Tamhane was writing the acuity exam (taking place November 22nd). He can usually write one version in 5 hours. After Mr. Tamhane works for an hour, Ms. Zinn joins him. Together, they finish writing the exam after another 2 hours pass. How long would it take Ms. Zinn to write the exam on her own?