On a baseball diamond, the distance between bob to jerry and jerry to allen are 30 feet and 40 feet respectively. if we assume that the angle at jerry is a right angle, what is the distance from bob to allen?

Since Jerry is a right angle, then we have a scalene triangle where the base is 30 feet and the height is 40 feet.
 To find the distance from bob to allen we have to find the hypotenuse of the triangle
 By Pythagorean theorem
 d = root ((30) ^ 2 + (40) ^ 2) = 50
 the distance from bob to allen is 50 feet