Answer:
458965315648
Step-by-step explanation:
Answer:
The formula for area of a circle is : A = PI x r^2
A) find the are of the two circles, subtract the two to find the area of the side walk:
Outside circle: A = PI x 10^2
Area = 100PI
Inner circle: A = PI x 8^2
Area = 64PI
Area of sidewalk:
100PI - 64 PI = 36PI
B) replace PI with 3.14:
Area = 36 x 3.14 = 113.04 square meters.
Step-by-step explanation:
Hope this helped.
Answer:
Step-by-step explanation:
a = -3
Factor out the common term 3.
Cancel 3.
Subtract <em>a</em> from both sides.
Simplify 1 + 2a - <em>a </em>to 1 + a
Subtract 1 from both sides.
Simplify -2 - 1 to -3
Switch sides.
