For this case we have that by definition, the circumference of a circle is given by:

Where:
d: It is the diameter of the circle
They tell us that:

Substituting:

Thus, the circumference of the circle is 55 centimeters.
Answer:
Option B
You must use distributive property to get 2m+10+48m+8 and then add all like terms. You get 50m+18 as your final answer.
Answer: 
Step-by-step explanation:
Given
The dog has a 25 ft leash
Arc length is 74.3 ft
Arc length is given by

here, r=25 ft
l=74.3 ft
Put the values

The measure of the angle is 
Answer:
(
a
−
1
+
b
)(
a
−
1
−
b
)
.
Answer:
The second one is the right answer