The lengths of human pregnancies are normally distributed with a mean of 250 days and a standard deviation of 10 days. What is the probability that a pregnancy lasts at least 260 days?

Seymour is twice as old as cassandra. if 16 is added to cassandra’s age and 16 is subtracted from seymour’s age, their ages become equal. what are their present ages? show !

Aball is dropped from a height of 10m above the ground. it bounce to 90% of its previous height on each bounce. what is the approximate height that the ball bounce to the fourth bounce?

Which net represents the pyramid below? meh