The milligrams of sodium in a 20 ounce sports drink is 275 milligrams. Work: I divided 110 by 8 which gave me 13.75 13.75 is the milligrams of sodium in each ounce. I then divided it by 20 and got 275 the number of milligrams in a 20 ounce drink.
For this case we have the following functions: f (x) = 36 + 4x g (x) = x2 + 15 By matching both functions we have: f (x) = g (x) 36 + 4x = x2 + 15 Rewriting we have: x2 + 15 - 4x - 36 = 0 x2 - 4x - 21 = 0 Solving the polynomial we have: (x-7) (x + 3) = 0 x = -3 x = 7 Taking the positive root we have: x = 7 Answer: They will have the same amount of money saved after: x = 7 weeks
