## dylanm Group Title 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? 2 years ago 2 years ago

1. jasonxx

are you talking about 16?

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...