Answer:
8483 ft²
Step-by-step explanation:
Subtract the area of the smaller circle from the area of the greater circle
Greater Circle area:
πr² = π × 140²
= 61583.2 ft²
Smaller Circle area:
= π × 130²
= 53099.8 ft²
Area of track:
61583.2 - 53099.8 = 8483.4ft²
= 8483ft² (to the nearest ft²)
A:
x = a negative number
B:
x = a positive number
C:
x = any number, +/-
Answer:
Your answer is 180°
Step-by-step explanation:
If you had up all of those angles you get 180°.
Answer:
Step-by-step explanation:
Represent the number by x. Then:
9x - 4 = 23
Answer:

Step-by-step explanation:
The area of a circle is given by :

Where
r is the radius of the circle.
If we talk about the area of half of the circle, it means we have to half the area such that,

Hence, this is the required solution.