Answer:
It's -539
Step-by-step explanation:
539 is a positive number in this one, so to find the opposite, you'd make the number a negative one, which is -$539
Answer:

Step-by-step explanation:
The time constant of the element X is:


The decay function has the following form:




First, take all the sides you already have, then add them up. (You should get 12) To find the other two sides, do some more simple addition. The 2+3+2 of the the top side add up to six (the bottom side) and sides equal each other so add another three. Total is 12+6+3=21