Fifty-two of 80 marbles are red. What percent of the marbles are red?

If square root x = -7, then x= -49 true or false

The midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square

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?