Answer:

Step-by-step explanation:
Given the expression
, we will use laws of indices to get the equivalent expression as shown below;
According to one of the law of indices,


This gives the required expression
I assume the base of S is the disk centered at the origin, or x² + y² ≤ r². Solving for y gives two solutions corresponding to the upper and lower halves of the circular boundary,

and the vertical distance between them - i.e. the side length of each cross section - is

Then the volume of each square cross section 4 (r² - x²) ∆x, and the volume of S is

By symmetry, this is the same as

which gives a volume of

Answer:
The Watermelon candies cost 13 more cents then the chocolate.
Step-by-step explanation:
$3.48 divided by 12 is 29 cents
$1.28 divided by 8 is 16 cents
Subtract 16 from 29 and get 13