In which expression should the exponents be multiplied? 2 to the 9th over 2 to the 7th (610)−7 one half to the 3rd times one half to the 5th 52 ⋅ 54

Kayla made observations about the sellin price of a new brand of coffee that sold in the three different sized bags she recorded those observations in the following table 6 is $2.10 8 is $2.80 and 16 is to $5.60 use the relationship to predict the cost of a 20oz bag of coffee.