## anonymous one year ago Urgent Help Please : A ladder leans against a building. The angle of elevation of the ladder is 70°. The top of the ladder is 25 ft from the ground. To the nearest tenth of a foot, how far from the building is the base of the ladder? 20.5 ft 30.5 ft 32.3 ft 39.5 ft

1. anonymous

@perl

2. anonymous

|dw:1433195125194:dw|

3. anonymous

is that 27 ?

4. anonymous

|dw:1433195241549:dw|

5. anonymous

|dw:1433195262939:dw|

6. anonymous

so we are solving for x

7. anonymous

im sorry 25 feet y i had 27 feet

8. anonymous

it's okay ^^.

9. anonymous

you will either use tangent sine or cosine for the answer

10. anonymous

which one do you think will work?

11. anonymous

Tangent

12. anonymous

$\tan =\frac{ opposite }{ adjacent? }$

13. anonymous

sine ?

14. anonymous

no cosine

15. anonymous

$\cos70 =\frac{ x }{ 25 }$

16. anonymous

then u cross multiply

17. anonymous

25cos(70)=x

18. anonymous

plug that in your calculator and see what you get

19. anonymous

8.55

20. anonymous

is that an option?

21. anonymous

no..did I do something wrong?

22. anonymous

im not sure maybe i did

23. anonymous

@ amielli Thx for trying

24. anonymous

i dont know where I went wrong .. sorry i couldnt help much