Athermometer is randomly selected and tested. draw a sketch and find the temperature reading corresponding to upper p 89, the 89 th percentile. this is the temperature reading separating the bottom 89 % from the top 11 %.

Explanation:

Given :

μ = 0

σ = 1

For 89th percentile

using invariant norm ( area, μ, σ )

       = inv. norm ( 0.89, 0, 1 )

       = 1.23

or

P ( x > ) = 0.89

Now using Normal table, Z = 1.23

Therefore,

d

explanation:

v=uf/(u-f)

= 5.10/(5-10) convex lens has positive focal length

=50/-5

=-10 cm (formed at other side)