PLEASE HELP

which of these four sets of side lengths will form a right triangle?
Set 1
6 cm, 7 cm
12 cm
8 in
Set 2
29 in, V35 in
Set 3
3 mm, 4 mm, 5 mm
Set 4
26 ft, 6 ft
9 ft
Set 1
Set 2
Set 3
Set 4

∠aed is formed inside a circle by two intersecting chords. if minor arc bd = 70 and minor arc ac = 180, what is the measure of ∠ aed? a) 45° b) 50° c) 55° d) 60°

The random variable x is the number of occurrences of an event over an interval of ten minutes. it can be assumed that the probability of an occurrence is the same in any two-time periods of an equal length. it is known that the mean number of occurrences in ten minutes is 5.3. the appropriate probability distribution for the random variable

Is this a polynomial function? i need to know asap