Answer:
The answer is No. She should have divided by 10 to find 10%.
Step-by-step explanation:
Using the washer method, the volume is given by the integral

where 3 - 1 = 2 is the distance from <em>y</em> = 3 to the axis of revolution, and similarly (1 + sec(<em>x</em>)) - 1 = sec(<em>x</em>) is the distance from <em>y</em> = 1 + sec(<em>x</em>) to the axis. The integrand is symmetric about <em>x</em> = 0, so the integral "folds" in on itself, and the integral from -π/3 to π/3 is twice the integral from 0 to π/3.
So the volume is


For these lines, let

.

And for these, let

.
Now,

The vertices of

in the x-y plane are (0, 2), (2/3, 10/3), (2, 2), and (4/3, 2/3). Applying

to each of these yields, respectively, (2, 2), (2, 4), (-2, 4), and (-2, 2), which are the vertices of a rectangle whose sides are parallel to the u-v plane.
Answer:
Option C is the correct answer.
Step-by-step explanation:
Perimeter of current office = 88 ft
We have perimeter = 4a , where a is the side of square.
Equating
4a = 88
a = 22 sqft
Area of current office = a x a = 22 x 22 = 484 square feet.
Area of new office is twice the area of current office.
Area of new office = 2 x 484 = 968 square feet.
Option C is the correct answer.