Your answer is A. You literally plug in the numbers for a and b to solve for the equation.
Four hundred eighty two point seventy three tenths
Answer:
k ≥ -18
Step-by-step explanation:

The decimal gives after the 9. There are four places behind the decimal between the two numbers being multiplied so there have to be 4 places behind the decimal in your answer.
(4,2) is is the distance from these coordinates