What is the probability that a point chosen at random in the given figure will be inside the smaller triangle?

enter your answer, as a fraction in simplest form, in the box.
p(inside smaller triangle) =

Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.

Can someone answer this question for me