Can someone help me with this math homework please!

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

1. writing an equation for an exponential function by 2. a piece of paper that is 0.6 millimeter thick is folded. write an equation for the thickness t of the paper in millimeters as a function of the number n of folds. the equation is t(n)= 3. enter an equation for the function that includes the points. (-2, 2/5) and (-1,2)

What is the distance from zero if a quadratic function has a line of symmetry at x=-3 and a zero at 4