Can you figure out the solution?

Options:

a) 8
b) 6
c) 2
d) 5

The value √10 and √15 are plotted on the number line

Abank gives 6.5% interest per year. what is the growth factor b in this situation?

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¯¯¯¯¯¯¯¯)?