There should have been an attached image.
Area of a circle is can only be computed when the radius or diameter is provided.
Area of a circle = π r²
Based on the image I saw, the radius is 5.6 inches
A = 3.14 * (5.6in)²
A = 3.14 * 31.36 in²
A = 98.47 in² ⇒ CHOICE D. 98.5 square inches.
Each cross section is a square with side length equal to the vertical distance between the curves
and
, with
, or
. Then each section has an area of
, so the volume of this solid is

For computing the integral, consider the substitution

Then the integral becomes


Integrate by parts twice; for the first round, take



For the second round, take



and the rest is trivial.
The most each baseball can cost is $7
You find the measure of angle BEC, by adding angle B and angle C which is 43+90, and then subtract that from 180 and get 180-(43+90). Then you take the measure of angle BEC (which is the same as AEB), take AEB and A which is 90 degrees and add those together. Then you take that and subtract it from 180, which is 180-(AEB+90)
The 2-point form of the equation of a line is
.. y = (y2 -y1)/(x2 -x1)*(x -x1) +y1
For your points (x1, y1) = (0, 3) and (x2, y2) = (3, 5), this is
.. y = (5 -3)/(3 -0)*(x -0) +3
.. y = (2/3)x +3
Written as a function, it is
.. f(x) = (2/3)x +3