If you were to randomly survey 1,000 people at a local grocery store about their use of corrective lenses, would this be a valid random sample for your study on use of corrective eyewear in the United States? Why or why not?

yes it would as it is a survey that is completely at random, however you shouldn't say "oh, 682 in 1000 people in the united states use corrective lenses", because it could vary based on the location and other factors. hope this helps! :)

Step-by-step explanation:

option a, c,d are correct.

step-by-step explanation:

from the given figure, it is given that z is equidistant from the sides of the triangle rst, then from triangle tzb and triangle szb, we have

tz=sz(given)

bz=zb(common)

therefore, by rhs rule,δtzb ≅δszb

by cpctc, sz≅tz

also, from δctz and δasz,

tz=sz(given)

∠tcz=∠saz(90°)

by rhs rule, δctz ≅ δasz, therefore by cpctc, ∠ctz≅∠asz

also,from δasz and δzsb,

zs=sz(common)

∠zbs=∠saz=90°

by rhs rule, δasz ≅δzsb, therefore, by cpctc, ∠asz≅∠zsb

hence, option a, c,d are correct.