## dylanm 3 years ago Can someone explain to me how it is possible to determine an answer for this question? http://i.imgur.com/ahpPs.jpg The waterslide one, I've had a go at it but there simply does not seem to be enough information (equations etc) to get answers. Any ideas?

1. jasonxx

2. dylanm

The one underneath, Analysis Question 1.

3. jasonxx

use tan theta= h1/ 5

4. jasonxx

and $h1= \sqrt {l^2-25}$

5. dylanm

In order to use trig, you need an angle, but there is no angle listed in this question.

6. jasonxx

coordinate of A is (16,0)

7. dylanm

The answer section in the back of the book states it is (15,0)

8. jasonxx

hmm...wait a sec

9. jasonxx

how come this cubic equation has got two roots only??

10. jasonxx

let's say coordinate of A is (x1,0)...your cubic function will be (x-0)(x-8)(x-x1)

11. jasonxx

but at x=0 value of cubic function is h1

12. jasonxx

so the function is (x-h1)(x-5)(x-x1)

13. jasonxx

now i am realising ...this question is really a good one :)

14. jasonxx

@lgbasallote where are you...come here ..have some fun

15. lgbasallote

someone called?

16. jasonxx

yea me....check out the question and help to figure this out ...please

17. lgbasallote

sorry. i hate math...i have no idea

18. jasonxx

well i had been seeing that...you have solved mathematics for most of the time ...but it's fine....if you don't wanna get in to this

19. lgbasallote

i seriously do not have any idea. i'm just a primary school student.

20. jasonxx

cool...