The common difference is 8 because you add eight to each number to get to the next.
To raise a number n to a negative power you simply take the fraction 1/n and raise it to the (positive) power you want.

So 2^-2 is ¼.
Answer:
d. -4.4
Step-by-step explanation:
We know that log (a/b) = log a - log b
Since log a = 1.2 and log b = 5.6 , we can substitute these values into the equation.
log (a/b) = 1.2 - 5.6
= -4.4
∧ -1
X = 1/2 X
Answer = 1/2 x
As age increases, the value decreases. Older = less valuable
Value = k x 1/age
$3,000 = k x 1/6
To find k, use $3,000 = k/2
k = $6,000
Substitute $6,000 for k
$3,000 = $6,000 x 1/6 = $1,000