Problem: if the height of a right cone c is 3 and the diameter of the base of c is 8 , what is the distance from the apex of c to any point on the circumference of the base of c ? 
Options: ['a ) 3 √ 2', 'b ) 5', 'c ) 5 √ 2', 'd ) √ ( 67 )', 'e ) √ ( 73 )']
b