Answer:

Step-by-step explanation:
The given series is

The first term is

The last term is

To find the number of terms in the sequence, solve,


The sum of the first i-terms of an arithmetic sequence is:

We substitute the values to get;



We will use formula for circumference of circle:
lets name it as O
O = 2*r * pi
when we express r in this formula we get:
O = 2*2.2*pi
O = 4.4*pi
From this we can see that for given radius, answer is 4.4. The formula only depends on pi and that is what "in terms of pi" means.
It's already rounded to the nearest tenth. The second decimal place is the tenths decimal place
Tina increased 40% time from Tuesday to Thursday
Step-by-step explanation:
The percent increase is given by:

Where

Here given
Increase = 10 minutes
Initial value = 25 minutes
So the percentage increase will be:

Tina increased 40% time from Tuesday to Thursday
Keywords: Percent, percentage
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Answer:
the 2nd one is the answer