Find the scale factor for each pair of similar figures

What is the value of x in the diagram below?

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth

The height of a flare fired from the deck of a ship in distress can be modeled by h(t)= -2(8t^2-52t-28), where h is the height of the flare above water and t is the time in seconds. a. find the time it takes the flare to hit the water.