Explain how you could use the construction tool or a compass and straightedge to create a line segment that is twice as long as ab

1. using the straightedge, draw a straight line that is more than twice the length of ab. make a mark on the line at the point where you want a', the end corresponding to a.2. set the compass width to the length of ab.3. with the compass point at a', make a mark on your line at a'' that is the length of ab from a'.4. move the compass point to a'' and mark the point b' on your line that is the length of ab from a'' (and twice the lenght of ab from a').the length a'b' is now twice as long as ab.

Yes, that is the correct formula. to solve this problem given the number of years, plug in the number of years for t and plug the whole thing into the