The diameter of a circle is 3 m. Find the circumference \textit{to the nearest tenth}to the nearest tenth.

Acircle has a circumference of 7.850 units. what is its radius?

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?

Can anyone explain to me how to do this? anything will .