3x^2 + 64 = 2x^2/2 find the roots of the quadratic equation

What are the relative frequencies to the nearest hundredth of the columns of the two-way table?

This is so hard and it’s for a test

Suppose a store sells an average of 80 cases of soda per day. assume that each case contains 24 cans of soda and that the store is open 10 hours per day. find the average number of soda that the store sells per hour.