Answer:
72
Step-by-step explanation:

To do these, you have to place the entire function inside the parent function's variables.
You are inputting the value of the function g(x) into f(x)
Ithe diameter would be about 5
JK= 8, because x+3= 2x-5= 19
D=z, j=4d,
If w=j, then w=4d,
If w=4d and d=z then:
w=4z