At PetSmart, zebra fish cost $2.10 each and neon tetras cost $1.85 each. Nicolas bought 13 fish for a total of $25.80 (not including tax). How many of each fish did he buy?
Separate your answer list with a comma, for example: 30 neon tetras, 20 zebra fish.

Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 25002500 grams and a standard deviation of 800800 grams while babies born after a gestation period of 40 weeks have a mean weight of 27002700 grams and a standard deviation of 385385 grams. if a 3232-week gestation period baby weighs 21252125 grams and a 4040-week gestation period baby weighs 23252325 grams, find the corresponding z-scores. which baby weighs lessless relative to the gestation period?