The answer is option 2,
2x10^10
The area of a circle in terms of the circle's radius

is

Differentiating both sides with respect to

, you get
Answer:
34
Step-by-step explanation:
Points B,C,D, and E are points on the edge of the circle.
and
are in the same segment.
We have that: 
We want find 
Recall that angles in the same segment are congruent.

So the answer is 34
Answer:
A person who watches 8.5 hours of TV can do 30.4 sit ups.
Step-by-step explanation:
The regression equation is used to predict or estimate the value of the response (or dependent) variables using the information about the explanatory (or predictor) variables.
The general form of a regression equation is:

Here,
<em>y</em> = dependent variable
<em>x</em> = independent variable
<em>a</em> = intercept
<em>b</em> = slope
The regression equation representing the relationship between hours of TV watched per day (<em>x</em>) and number of sit ups a person can do (<em>y</em>) is:

Compute the number of sit ups a person who watches 8.5 hours of TV can do as follows:


Thus, a person who watches 8.5 hours of TV can do 30.4 sit ups.