Pls help ASAP I will do anything

What is the distance between the points (2 -3) and (-6 4) on the coordinate plane

Afactory buys 10% of its components from suppliers b and the rest from supplier c. it is known that 6% of the components it buys are faulty. of the components brought from suppliers a,9% are faulty and of the components bought from suppliers b, 3% are faulty. find the percentage of components bought from supplier c that are faulty.

For a function f(x), a) if f(7) = 22 then f^-1(22) = b) f^-1(f(c)) =