Tim is choosing between two cars to buy. the first car is $10070 and has 25% off. the second car is priced at $11905 and has 30% off. a) estimate the price of each car , using an appropriate and sensible strategy. explain your estimation strategy. b) calculate the price of each car -- show your working. c) write down a general formula for calculating the sale price (s) of a car in terms of the following variables: the original price (p) and the discount as a percentage (d) ( hint: your answer will be s=