If a and b are the two values of t that satisfy the equation t^2 − t − 6 = 0, with a ≥ b, what is the value of a − b? a. 5b. -5c. 1d. -1

Really need on these. i have no idea what to do

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

In what organelle does photosynthesis take place?