Answer:
The area needed to be painted is approximately 301.44 square inches.
Step-by-step explanation:
The shape of a donut is represented by two concentrical circles, whose area is described by the following formula:
(Eq. 1)
Where:
- Total area of the donut, measured in squared inches.
- Area of the greater circle, measured in square inches.
- Area of the lesser circle, measured in square inches.
By using the definition of the area of the circle, we expand the equation above:
(Eq. 1b)
If we know that 
, 
and 
, the area needed to be painted is:
The area needed to be painted is approximately 301.44 square inches.
<span>√4
---
</span><span>√10
</span>
√4 * √10
= ---------------
√10 * √10
2 √10
= ----------
10
√10
= ----------
5
Answer:
Step-by-step explanation:
+
1.85
5.40
_____
6. 2 5
The correlation coefficient is -0.96.
Plotting these points in a graphing calculator and running the linear regression will get you the r value.
Answer:
21 feet
Step-by-step explanation:
pythagoreom theorem
a^2+b^2=c^2
6.5^2+20^2=c^2
42.25+400=c^2
442.25=c^2
21 feet
