-16 because you need to subtract -4 from -12
Note this pattern: Mult. 24 by (-1/4) produces -6.
Mult -6 by (-1/4) produces 6/4 = 3/2
Mult. 3/2 by (-1/4) produces 3/8
Looks as though you copied the problem down incorrectly. You wrote 32 for 3/2 and -38 for -3/8.
The common ratio is -1/4.
5.
First plug the value of x into the equation

then solve for y

6. Do the same steps
The answer should be 26 hours