## anonymous one year ago If a 30-foot silo casts a 20-foot shadow, what is the approximate measure from the tip of the shadow to the top of the silo? 1,300 feet 36 feet 650 feet 13 feet

1. anonymous

|dw:1435766284274:dw|

2. anonymous

pythagorean theorem

3. anonymous

:( i fail at this :p

4. anonymous

the square of the 2 legs will equal the longest side we have the 2 legs and we're trying to find the hypotenuse, x

5. anonymous

6. anonymous

so $$30^2+20^2=x^2$$

7. anonymous

1300

8. anonymous

<3 thanx

9. anonymous

not yet bby

10. anonymous

$$30^2+20^2=x^2\\900+400=x^2\\1300=x^2\\x=\sqrt{1300}$$

11. anonymous

you solved for x^2 but we need x

12. anonymous

so divide by 2 or by itself

13. anonymous

take the square root square roots and squaring are inverse operations. one undoes the other

14. anonymous

so just plug in $$\sqrt{1300}$$ into a calculator

15. anonymous

so technically 36

16. anonymous

indeed

17. anonymous

18. anonymous

you're* :p

19. anonymous