Dr. Dre is the founder and CEO of Aftermath Entertainment and Beats Electronics. On the release day, Dr. Dre sold 300 Beats and averaged 30 Beats per day after that. Which equation models the number of Beats, b, Dr. Dre sold after d days?

d=30+300b

d=300+30b

b=30+300d

b=300+30d

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?