You can learn how to do hard level math by:
-Practicing hard level math
-asking friends who do hard level math to analyze if you have the ability for hard level math
-believing you can do hard level math
-learning from your mistakes :p
Hope this helps you ♥︎☁︎☀︎☁︎
Answer:
decreasing, linear
Step-by-step explanation:
you <em>could</em> find the first differences and then the secon ddifferences, but when it's allowed to use Desmos, why not, lol, so, looking at the 4 points plotted on Desmos, it is decreasing, and linear
Answer: (13.4996, 32.5004)
Step-by-step explanation:
The confidence interval for mean difference is given by :-
,
where 
= sample mean difference .
= critical t value (two-tailed)
SE= Standard error.
Given : 
SE= 4.2
Now, the confidence interval for mean difference will be :-
Hence, the required confidence interval : (13.4996, 32.5004)
