An arrow is shot up in the air from a height of 3 feet. The height of the arrow, in feet, can be modeled with the function h=−2t2+12t+3, where h is the height in feet and t is the time in seconds. Enter the average rate of change, in feet per second, from 1 second to 4 seconds.

answer: you need the equation in the question so i can answer it

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.

the answer is  

d.

21

i did this one. so you should get it right.

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