Determine the scale factor for each pair of shapes and label the missing length

In an experiment you are to flip a two sided coin 100 times and record 55 heads up and 45 tails up determine the theoretical and experimental probability of getting a heads up in the experiment.

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

What is the length of the segment, endpoints of which are intersections of parabolas y=x^2− 11/4 x− 7/4 and y=− 7 /8 x^2+x+ 31/8 ?