Plz help me out it would be a help!!

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

Find 63% of 77. a. 0.485 b. 48.5 c.0.818 d.81.8

Enter the amplitude of the function. f(x)=3cosx