Whose sequence proves triangle abc is congruent to triangle def? why?

preston says the sequence of transformations that maps triangle abc onto triangle def is: rotate it 180 degrees about the origin, and then translate it up 7 units.

chanel says the sequence of transformations that maps triangle abc onto triangle def is: reflect it across the x-axis, then reflect it across the y-axis, and then translate it up 6 units and left 1 unit.

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?