Step-by-step explanation:
1. 
multiply

do both the numerator and denominater

Answer:
120cm^3
Step-by-step explanation:
Consider this option:
1.the equation of the circle using its centre and point (0;-4) is:
x²+y²=4.
2. to substitute given point (23;2) into the equation of the circle:
23²+2²≠4
answer: this point does not belongs to the circle.