12^3 / 12^7 = 12^3-7
= 12^-4
Answer:
15.95 feets
Step-by-step explanation:
Given that:
Angle of elevation = 62°
Using trigonometric relation :
Tanθ = opposite / Adjacent
From the drawing attached :
Opposite = 30 feets
Distance between girl and lighthouse = d
Tan 62 = 30 / d
1.8807264 * d = 30
d = 30 / 1.8807264
d = 15.951283
d = 15.95 feets
Watch this vid to see how to multiply: https://www.khanacademy.org/math/arithmetic/fractions/multiplying_fractions/v/multiplying-fractions
The answer is 21! - hope it helps