Which polynomials are in standard form

Given the function f(x) = log base 4(x+8) , find the value of f^-1(2)

Which of the following are parts of a sphere

Jackie purchased 3 bottles of water and 2 cups of coffee for a family for $7.35. brian bought 4 bottles of water and 1 cup of coffee for his family for $7.15. how much does each bottle of water cost? how much does each cup of coffee cost? i need this done