Answer:
I think the F could mean force like F = ma (mass acceleration)
Step-by-step explanation:

about $3 because...

and

which is probably as close as your gonna get
That would be C....(1 x 10^-1) + (6 x 10^-2) + (9 x 10^-3)
Answer:
[-2, ∞]
Step-by-step explanation:
15 - √(x+2)
domain is any value as long as (x+2) is not-negative, since √ of a negative number has no Real solution.
x+2 ≥ 0 ⇒ x ≥ -2