Answer:
C. xy²
Step-by-step explanation:
You have to add the exponents:
(xy) exponent is 1
(x) exponent is 1
Combine the (x):
xy²
Find .5% of 1.8 meters
.05*1.8=.09
It’s increases by .09meters
Add that to the 1.8 meter bar
1.809 meters
Answer:

Step-by-step explanation:
Given: ![7-3[(n^{3} +8n)\div (-n)+9n^{2} ]](https://tex.z-dn.net/?f=7-3%5B%28n%5E%7B3%7D%20%2B8n%29%5Cdiv%20%28-n%29%2B9n%5E%7B2%7D%20%5D)
Now simplifying expression using PEDMAS
First solving for small parenthesis.
taking common of n
= ![7-3[n(n^{2} +8)\div (-n)+9n^{2} ]](https://tex.z-dn.net/?f=7-3%5Bn%28n%5E%7B2%7D%20%2B8%29%5Cdiv%20%28-n%29%2B9n%5E%7B2%7D%20%5D)
using law of indices, 
= ![7-3[-(n^{2} +8)+9n^{2} ]](https://tex.z-dn.net/?f=7-3%5B-%28n%5E%7B2%7D%20%2B8%29%2B9n%5E%7B2%7D%20%5D)
Opening parenthesis
= ![7-3[-n^{2} -8+9n^{2} ]](https://tex.z-dn.net/?f=7-3%5B-n%5E%7B2%7D%20-8%2B9n%5E%7B2%7D%20%5D)
= ![7-3[ -8+8n^{2} ]](https://tex.z-dn.net/?f=7-3%5B%20-8%2B8n%5E%7B2%7D%20%5D)
Again using distributive property of multiplication
= 
= 
Hence, the answer is 