Does anyone know how to do
a student scored in the 85th percentile on her chemistry exam. what does this student's score mean in relation to those of the other test takers?
her score was better than those of 85% of all test takers.
her score was worse than those of 85% of all test takers.
her score on the exam was 85%.
her score was in the top 85% of all test takers' scores.

you probably already have the answer but anyways it's b. 15.0

step-by-step explanation:

ans789

step-by-step explanation:

answer:   the paragraph proof is mentioned below.

step-by-step explanation:

given: in a δxwy where

such that, ∠wzx ≅ ∠yzx and zw≅zy

we have to prove that: segment zx is a perpendicular bisector of segment wy.

prove: since, zw≅zy ⇒ ∠wzy is a supplementary angle.

then, ∠wzy= 180°

⇒∠wzx + ∠yzx = 180° ( because xz divides ∠wzy into two parts)

but, ∠wzx ≅ ∠yzx ( given)

⇒∠wzy+∠wzy=180° ( by substitution)

⇒2∠wzy=180°

⇒∠wzy=90°

⇒∠wzy=∠yzx =90°

therefore, xz⊥wy where wz=zy

⇒zx is a perpendicular bisector of wy.