Point P has coordinates (4, 9), and point Q has coordinates (8, 1). To the nearest unit, what is the distance between the two points? You may use the coordinate grid to help you answer the question. 6 units
7 units
8 units
9 units

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