What is/are the increasing interval(s) for the function shown?

Please help !

What is the missing reason in step 5? linear pair postulategivendefinition of complementary anglescongruent complements theorem

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x

Ron has 8 caps and 4 of his caps are blue. thes rest of his cap are red. how many of ron's caps are red