from 12:00 midnight to 6:00 am, the temperature decreased by 12 degrees Celsius. If the original temperature was 12 degrees Celsius, which expression can be used to represent the situation? Can i get help with this one

These are the multiples of 15 but what you are probably asking or what are the factors of 15

Part a)  product a is decreasing by 18% per year1 - .18 = .82part b)  which product recorded a greater percentage change in price over the previous year?   product b recorded a greater percentage change.  justify your answer: the equation for product b is  y= 10000(.56)^x , and 1 - .44 = .56product b decreases by 44% per year