Dr. black is standing 20 feet from the street lamp the lamp is making the shadow 5 feet long he estimates angle of elevation from the tip of the shadow to the top of the streetlamp is 30° how tall is the streetlamp

step-by-step explanation:

i dont get

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: