Answer:
64.8
Step-by-step explanation:
FFFFFUUUCCCKKKUUUUUUUUUKKKKKKKKCCCCCCCCCFFFFFFFFFFFF
Answer;
Commutative Property
It is considered commutative when changing the order of the operands does not change the result.
(a brainliest would be appreciated)
We have:

Then we use trigonometric identities to change the negative sign of the trigonometric functions, so:

We clear f(x):

we simply what we can:

Thus, the correct answer is;
Answer: 1.303639
Step-by-step explanation:
The t-score for a level of confidence
is given by :_
, where df is the degree of freedom and
is the significance level.
Given : Level of significance : 
Then , significance level : 
Sample size : 
Then , the degree of freedom for t-distribution: 
Using the normal t-distribution table, we have

Thus, the t-score should be used to find the 80% confidence interval for the population mean =1.303639