## iheartfood 2 years ago Air pressure may be represented as a function of height above the surface of the Earth as shown below.

1. iheartfood

2. iheartfood

Answer choices A,B,C,D from top to bottom :)

3. jim_thompson5910

P(h) is the pressure at some height h It's given that the pressure at this unknown height is 75% of the pressure at sea level What is the pressure at sea level?

4. iheartfood

umm p(.75) ??

5. jim_thompson5910

p(0.75) means that you're finding the pressure when h = 0.75

6. iheartfood

so thats not it??

7. jim_thompson5910

no

8. iheartfood

it is?

9. iheartfood

or it isn't?? :/ if so, what do i do next?

10. jim_thompson5910

it says right in there that the pressure at sea level is P0

11. iheartfood

ohhh i see now.. kk what do i do now?

12. iheartfood

do i plug in or something?

13. jim_thompson5910

75% of this pressure at sea level is what

14. iheartfood

.75Po ?

15. jim_thompson5910

yep

16. jim_thompson5910

so replace P(h) with 0.75P0

17. jim_thompson5910

because at this unknown height, the pressure is 75% of the sea level pressure

18. iheartfood

oh i see, so that leaves me with B as my answer right?? because of that and we do process of elimination it right??

19. jim_thompson5910

yep

20. iheartfood

awesome! thanks!! :)

21. iheartfood

awesome! thanks!! :)