Ava invested $470 in an account in the year 2000, and the value has been growing exponentially at a constant rate. The value of the account reached $660 in the year
2005. Determine the value of the account, to the nearest dollar, in the year 2011.

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