I think the answer is B. 55. Butbi would cheat to make sure.
The base of a cone is a circle.
The area of a circle is

.
Thus, the area of the base of a cone

.
The derivation of the formula for the area of a circle involves a bit of calculus, but if you'd like, I can walk you through it.
Answer:
Linear decreasing
Step-by-step explanation:
we know that
In the interval A we have a linear increasing function, because is a line and the slope is positive (as the value of x increases the value of y increases and as the value of x decreases the value of y decreases)
In the interval B we have a linear constant (the value of y is the same for all values of x)
In the interval C we have a linear decreasing function, because is a line and the slope is negative (as the value of x increases the value of y decreases and as the value of x decreases the value of y increases)
In the interval D we have a linear increasing function, because is a line and the slope is positive (as the value of x increases the value of y increases and as the value of x decreases the value of y decreases)
therefore
Interval C is a linear decreasing
2 ( x + 1 ) = 12
Use distributive property:
2x + 2 = 12
Subtract 2 from both sides:
2x = 10
Divide both sides by 2:
X = 5
Answer:
14/20
Step-by-step explanation: