The circumference of the top of the cake is in.
It sounds like the baker is trying to line the circumference with cherriesto fit as many as possible along the border, like in the picture I've attached below.
This comes down to dividing the cake's circumference by the diameter of each cherry:
or about 39 cherries, making the answer D.
Whenever you can invert a function, you have that the graphs of and its inverse
are reflected with respect to the line
So, given any point on the graph of , you can simply swap its coordinates to get the correspondent point on the original function
As an example, all exponential functions pass through the point , while all the logarithmic functions pass through the point