The air control tower spots an airplane traveling at a level altitude of 2500 feet. From the top of the 200 foot tower the air controller measures an angle of elevation to the plane is 28 degrees at point A. How much higher in the air the is the airplane than the top of the tower

2.54x10 to the 1st power because you take the first number you see to the left, place the decimal behind it, write the other numbers behind it (don't include 0s unless the 0 has a number above 0), multiply by 10, and to figure out the exponet, you just count how many spaces the decimal moves. If the decimal moves to the right then the exponent is positive, of you move it to the left then the exponet is negative.