The sales tax for all items in a store is 8%, added after all discounts are applied. Let f (x ) represent the price of an item, including sales tax, and g (x ) represent the effect of a discount on the price of an item, not including sales tax. Which function f (x ) represents the price of an item, including sales tax, that originally costs x dollars?

Two trains leave a station on different tracks. the tracks make an angle of 130°, with the station as a vertex. the first train travels 100 km and makes its first stop at point a, while the second train travels 200 km and makes it first stop at point b. how far apart are the trains when both are at their first stop? round the answer to the nearest integer. a) 65 km b) 139 km c) 224 km d) 275 km