Allen read that the gas company was burying sheets of magnesium next to pipelines to prevent rusting. He decided to investigate the effectiveness of various metals in preventing rusting. He placed the following
into three separate test tubes of water: A) Iron nail B) Iron nail wrapped with aluminum strip C) Iron nail
wrapped with magnesium strip. He used the same amount of water, equal amounts of the metals and the
same size iron nails. At the end of five days he recorded the amount of rusting on the nails and the color of
the water.

the denominator has a very specific role.

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

i hope this : )

chert is a sedimentary rock composed of microcrystalline or cryptocrystalline silica. with this little bit of information, you can come to the conclusion that your answer is c.  

explanation:

thats not a question