Me with this you so much really need

-12 since she started 2 feet above the surface of the water than she jumped down to 10 feet under the water's surface. So it would be -12 for the first answer.

So if she was snorkeling at -12 surface of the water and she went to a rock that is 15 above her from before, it means that 15 + -12 which is 3 feet from the surface.

Hope you understand!

 on december 16 - 24: Posada and and a Pinata Fair is celabrated.(Feria de la Posada y Pinata) -- Alcoman, Estado de Mexico

A celebration near Mexico City of the Posadas procession and this children's party staple. Among the pinatas on display are those made from clay, traditional models with seven points that symbolize the seven deadly sins ( pride, lust,anger,gluttony, greed, envy,and sloth) , and those made from cardboard with popular children's designs. Workshops in pinata-making are also offered.