Find the 14th term of the geometric sequence 2,4,8

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. how many hours after the truck's departure will the two meet?

Secant be and cf intersect at point d inside a what is the measure of cde