What single percentage change is equivalent to a 12% decrease followed by a 13% decrease? Pls answer asap

Issof claims that the scale factor is 1/2. which statement about his claim is correct

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

Using inductive reasoning, what are the next two number in this set? 2,3/2,4/3,5/4,