Answer:
Step-by-step explanation:
Apply exponent rule: 
The answer would be 42. this being because of the fact that 102 can be reflected. you were supplied with the 60 and you want MLO soo subtract 60 from 102 thus giving you 42
The answer is 36 i use foil and cheaked in calculator
To find percentage decrease, we need to see how "much" of 120 was taken off.
So, let's call the percentage x (the percentage in decimal form).
120 * x = 78
so,
78/120 = x
.65 = x
So, our percentage in decimal form is .65, to get it to an actual percentage, we multiply it by 100 (since a percentage is out of 100)
The percentage decrease is 65%
