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The anwser cause i do not understand just plez

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.

On this question. a hypothermia occurs when a person's body temperature drops below 95 degrees fahrenheit. write and solve an inequality that describes how much lower the body temperature of a person with hypothermia will be than the body temperature of a person with a normal temperature of 98.6 degrees fahrenheit