12 is 1/5 of what number?

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.

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?