Can you guys solve this for me please

Can (3,5 and square root 34) be sides on a right triangle?

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

Which of the following parabolas opens down?