Areas and volumes of similar solids urgent?

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?

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)

George writes the mixed number as sum and uses the distributive property 1/2.-2/5=1/2-2+2/5=1/2