In ABC below, what is the measure of angle B? In particular, which option below gives an exact expression for mB and an approximation that is correct to the nearest tenth of a degree? Note: The triangle is not drawn to scale.

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)