Do i need to use a benchmark or no benchmark for 1/5 and 4/5

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

What is the area of the shaded sector?

Type the next three numbers in a sequence 80, 90, 85, 95, 90, 100, 95, 105