Can you me with this question i do not understand it

Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

One of the complementary angles is 4 degrees mor than the other. find the angles (recall that complementary angles are angles whose sum is 90 degrees.) which of the following can not be used to solve the problem if x represents one of the angles? a. 2x-4=90 b. 2x+4=90 c. x+4=90