Answer:
1. E. 8
(I just answer question 1, hope you don't mind.)
Step-by-step explanation:
12 x 100 : 150 = 8
<u>Given</u>:
The arc length for the given sector is 7π
The central angle for the given sector is θ
The radius of the circle is r.
We need to determine the formula for r in terms of θ
<u>Formula for r:</u>
The formula for r in terms of θ can be determined using the arc length formula,

Substituting the values, we have;

Dividing both sides by θ, we get;

Thus, the formula for r in terms of θ is 
The answer would be A because the theorem is not proven as true and reliable <span />
Answer:
159
Step-by-step explanation:
She paid 6 payments of 139
6*139 = 834
The cost was 675
834-675 =159
The interest was 159