a ring is now reduced to £840. this is a saving of 40% of the original price. work out the original price of the ring.( PL answer ty x)

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)

Can some one me with these questions

Triangle knm is what is true about the sides of knm