Okay, here we have this:
Considering the provided expression, we are going to solve it, so we obtain the following:

Finally we obtain that the expression is equal to 0.95°.
Using it's formula, it is found that their monthly payments for the mortgage loan will be of $515.45.
<h3>What is the monthly payment formula?</h3>
It is given by:

In which:
- n is the number of payments.
In this problem, we have that the parameters are given as follows:
P = 80000, r = 0.06, n = 25 x 12 = 300.
Hence:
r/12 = 0.06/12 = 0.005.
Then, the monthly payment will be of:


More can be learned about the monthly payments formula at brainly.com/question/22846480
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Answer:
Well according to the number line shown, it is in the negative area and if you see this it is near -6.5, all you need to do is count the spots until it hits the circle which is -6.8
Step-by-step explanation:
The first option is your answer.
Sigma notation is just a fancy way to shorten a sum of a series of numbers using a set equation. The "n =" tells you where to start in the sequence and the top number tells you where to stop.