A Bacterial Buffet A biologist keeps dangerous bacteria of six
different kinds in a long glass tube
separated into six chambers by membranes.
She has noticed that, if she removes a
membrane, bacteria start fighting their
neighbours.
Those which are in a minority always die,
together with an equal number of the
enemy. Equal colonies eat each other
completely!
Originally, there were a million bacteria of
the first kind, two million of the second, and
so on, up to six million of the sixth kind.
Is it possible for her to open the membranes
in turn in some order so that no bacteria
survived? Explain your answer.

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of

Aresearch study is studying the effects of a new drug for osteoporosis alzheimer's disease (ad) for women above the age of 65 years. a group of individuals with osteoporosis is randomized into two groups. one group is treated conventionally, and the second group is treated with the new medication. assessments are made at 3, 6, 12, 36, and 48 months. the conventionally treated group is assessed for ad using a serum blood test, and the treatment group is assessed for ad using a pet radiotracer that binds to beta-amyloid plaques. in comparing these 2 trial arms, the authors of the study may encounter which type of bias? a. selection bias on the risk of developing b. measurement bias c. confounding bias d. recall bias e. lead-time bias