A5-ounce can of tuna cost $0.90. a 12-ounce can of tuna coats $2.40. which is the better buy?

The second one is a better buy because you are paying two cents for each ounce in the first one youre paying 18 cents for each one

1.   an exact solution requires a radical solution - no decimal approximation.2. (a)4x^3 = 756x^3 = 756/4 = 189x =   cube root of 189 =   5.74   to nearest hundredth answer(b)   189 = 3*3*3*7   so we can write the cube root of 189 as 3∛7 answerchecking (a) 4*(5.74^3 =   756.48   which is very close(b)   4* ((3∛3)^3   = 4*189   = 756   - spot on! 3. i would use solution b because the original question asked for an exact solution.