What might cause a percentage of error if a human is doing the measuring? Check all that apply.

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

At your job you're paid $50 per week plus $3 per sale at least how many saled do you need to make in order to have over $250

What is the recursive formula for this sequence . 10,14,18,22,26