State the amplitude of 15sin2x - 5

For how answer my question this will be the last question can you answer in math subject

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 value of the product (3-2i)(3+2i)?