Twelve less than a number greater than 18

Acompany is testing in comparing to lightbulb designs the box plot shows the number of hours that each lightbulb design last before burning out which statement is best supported by the information of the plot

Solve each quadratic equation by factoring and using the zero product property. 14x - 49 = x^2

What is always true about a positive integer raised to a negative odd power?