Answer:
hi its simple.
Step-by-step explanation:
9;3
or simplified...
3;1
Answer:
A. T > 2.539
Step-by-step explanation:
We have a hypothesis test of the mean, with unknown population standard deviation.
The hypothesis are:

From the hypothesis we can see that the test is right-tailed, so the critical value of t should be a positive value.
The degrees of freedom can be calculated as:

The significance level is 0.01, so the critical value tc should be the one that satisfies:

Looking up in a t-table, for 19 degrees of freedom, this critical value is tc=2.539.
Answer:
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Step-by-step explanation:
To multiply two fractions, you simply multiply numerators and denominators together.
2 can be read as the fraction 2/1
So, the multiplication is
