Alana and josh invested their money into two different interest-bearing accounts. Alana invested $4,525 at 6.5% compounded monthly and josh invested the same amount at 6.5% annual simple interest rate. A.) after 8 years, how much will Alana have in the account? & B.) After 8 years, how much will josh have in the account ?

The function a represents the cost of manufacturing product a, in hundreds of dollars, and the function b represents the cost of manufacturing product b, in hundreds of dollars. a(t) = 5t + 2 b(t) = 7t - 2t +4 find the expression that describes the total cost of manufacturing both products, a(t) + b(t). a. 7t^2 - 7t + 2 b. 7t^2 + 3 +6 c. 7t^2 + 7t - 6 d. 7t^2 - 3t + 6