I have to fill out the missing years can someone help me quickly

What percent of 18 is 24? and plz explain thx.

An airplane is flying at an elevation of 5150 ft, directly above a straight highway. two motorists are driving cars on the highway on opposite sides of the plane, and the angle of depression to one car is 35 ̊ and to the other is 52 ̊. how far apart are the cars?

Use the second shift theorem to find the inverse laplace transform of (e^−3s) / (s^2 + 2s − 3)