About 12% of children are nearsighted. A school district will be testing the vision of 170 incoming kindergarten children.
What proportion of these kids should we expect to be nearsighted (p-hat)?

about 21 kids out of 170 are expected to be nearsighted (20:170)

Step-by-step explanation:

we find 12% out of 70 by muliplying 170 x 0.12 which equals 20.4

However it has to round up because we cant have half a child so 21 children.

step-by-step explanation:

given that there are two triangles j'k'l' and jkl>

the former is got by dilating the second one.

when drawn on a grid, (graph paper) coordinates of vertices of first triangle is

(6,12)j, (9,6)k and (12,9)l

side jk has length = distance between j and k

=

side j'k'=distance between j' and k'

=

ie j'k'l' has sides 1/3 of that of corresponding sides of jkl.

hence scale factor of 1/3 is used to get j'k'l'from jkl

12

step-by-step explanation:

a triangle's   full angle is 180 degrees so 180 - 156 = 24. 24/2=12