Find the surface area of the cone r=8 and h=7

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

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?

What is the name of a polygon that has four congruent sides and theses angle measures 60,120,60,120?