Ethan sells e candy bars for $2.50 apiece and Chloe sells c candy bars for $2.00 apiece to raise money for a school trip. Ethan sold 15 fewer candy bars than Chloe, but he also got a $6.00 donation. If Chloe and Ethan raised the same amount of money, which of the following systems could be used to find how many candy bars each sold?

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?