Answer:
multiply that and divided by 45
The fact that a double convex lens is thicker across its middle is an indicator that it will converge rays of light that travel parallel to its principal axis. A double convex lens is a converging lens. A double concave lens is also symmetrical<span> across both its </span>horizontal<span>and vertical axis.
This is from google btw.</span>
Answer:

Explanation:
Speed experimented by the ball before and after collision are determined by using Principle of Energy Conservation:
Before collision:


After collision:


The magnitude of the impulse delivered to the ball by the floor is calculated by the Impulse Theorem:
![Imp = (0.32\,kg)\cdot [(17.153\,\frac{m}{s} )-(-19.304\,\frac{m}{s} )]](https://tex.z-dn.net/?f=Imp%20%3D%20%280.32%5C%2Ckg%29%5Ccdot%20%5B%2817.153%5C%2C%5Cfrac%7Bm%7D%7Bs%7D%20%29-%28-19.304%5C%2C%5Cfrac%7Bm%7D%7Bs%7D%20%29%5D)
