What is the value of (-1/2) to the power of 4

Can someone answer these problems for me

Find the roots of the equation below. x^2 - 6 + 9 = 0

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.