The only ways i thought of was 0.7, 0.70, and 0.700 .
V= pi * r^2 * h
471 = 3.14 * r^2 *6
471 = 18.84 * r^2
25 = r^2
Sqrt25 = r
5 = r
D= 2*5
D= 10in
Answer:
The Answer is C .............
ANSWER

EXPLANATION
The given line passes through;
(-1,-1) and it is parallel to x + y = 3.
This line given to us can be rewritten as
y=-x+1
It has slope m=-1.
The line parallel to this line also has slope m=-1.
We obtain the equation of the line using the formula:

We substitute the slope and the point to obtain:



The equation of the line is

Let
be the random variable for the time a given person from the population spends sleeping. With
we have

where
.


Rounded to the nearest whole number, that comes out to about 31%.