Which one is the greater fraction 1/2 or 19/56

The hypotenuse of an isosceles right triangle is $14\sqrt 2$. what is the area of the triangle?

Ben bowled 124 and 188 in his first two games. what must he bowl in his third game to have an average of at least 160?

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?