This is the concept of scale factors, given that the length of the model which has been modeled by scale factor 1/64 is 0.39 inches, then the actual diameter will be:
scale scale factor=(model diameter)/(actual diameter)
where:
actual diameter=(model diameter)/(scale factor)
=0.39/(1/64)
=24.96 inches
Let x be the number of red balloons and y the number of yellow balloons used, then
x + y ≥ 40
y ≥ 25
So, if each one costs $54.99
Let "X" be the number of games sold, Let R(X) be the revenue

This function is continuous
Given:

To find:
The function
.
Solution:
we have,

Put g(x)=y.

Interchange x and y.

Isolate y.



Substitute
.



Therefore, the correct option is (3).