Sunday

March 29, 2015

March 29, 2015

Posted by **tom** on Tuesday, December 6, 2011 at 9:24pm.

- MATH -
**Anonymous**, Wednesday, December 7, 2011 at 6:33amAssume the observer started out x feet from the building

tan 20 = h/x

tan 40 = h/(x-75)

.3639 = h/x

.8390 = h/(x-75)

h = .3639x

so

.8390 = .3639x/(x-75)

x = 132.45

h = 48.20

**Answer this Question**

**Related Questions**

Trig - a person who eyes are 5 feet above the ground observes the top of a ...

Pre-Calculus - 1.The angle of elevation to top of a building from a point on the...

math - a man standing on ground level is 1000 feet away from the base of a 350 ...

Physics - a television antenna is on the roof of the building. from a pt. on the...

physics - a television antenna is on the roof of the building. from a pt. on the...

Precalculus - To estimate the height of a building, two students find the angle ...

Trig - From a point 120 feet from the base of a plant building the angle of ...

Trigonometry - A hill in Colorado makes an angle of 15.0° with the horizontal ...

Geometry - Please check for me .Thanks A building cast a shadow 23 feet long ...

precal - A contractor needs to know the height of a building to estimate the ...