I need help with is question ASAP please

Which math sentence can be used to determine if the triangle is a right triangle?

Which function has the domain x> -11?

The frequency table shows the results of a survey comparing the number of beach towels sold for full price and at a discount during each of the three summer months. the store owner converts the frequency table to a conditional relative frequency table by row. which value should he use for x? round to the nearest hundredth. 0.89 0.90 0.92 0.96