The experimental probability of rolling a 7 would be 4/25 (16%). Experimental probably is found by putting the frequency of the event over the total number of trials. In this case that is 16/100, which reduces to 4/25.
Look at this like a right triangle with a height of 32 M and the angle at the base of 22 degrees The distance from the boat to the lighthouse would be the base of the triangle
to find the base given the height and angle given the formula is