ILL GIVE BRAINLEST, please show work :)

What is the 12th term of b(n)=-4-2(n-1)

Dakota earned $7.50 in interest in account a and $18.75 in interest in account b after 15 months. if the simple interest rate is 4% for account a and 5% for account b, which account has the greater principal? explain. to make it a little easier, there is an image. good luck!

F(x) = 1/x g(x)=x-4 can you evaluate (g*f)(0) ? why or why not?