can you help me with these

6 The table below shows the average yearly balance in a savings Use this space account where interest is compounded annually. No money is computation deposited or withdrawn after the initial amount is deposited Year Balance, in Dollars 0 380.00 10 562.49 20 832.63 30 1232.49 40 1824.39 50 2700.54 Which type of function best models the given data? ( linear function with a negative rate of change (2) linear function with a positive rate of change (3) exponential decay function (4) exponential growth function 7 A company that manufactures radios first pays a start-up cost, and then spends a certain amount of money to manufacture each radio. If the cost of manufacturing r radios is given by the function c(r) = 5.25r + 125, then the value 5.25 best represents (1) the start-up cost (2) the profit earned from the sale of one radio (3) the amount spent to manufacture each radio (4) the average number of radios manufactured 8 Which equation has the same solution as x2 - 6x - 12 = 0? (1) (x + 3)2 = 21 (3) (x + 3)2 = 3 (2) (x - 3)2 = 21 (4) (x - 3)2 =3