Answer:
See explanation
Step-by-step explanation:
Zeroe of the function is such velue of x at which f(x)=0.
1. Consider the function 
Zeros are:
Zero 
has multiplicity of 1, zero 
has multiplicity of 2, zero 
has multiplicity of 5.
At or the graph of the function crosses the x-axis, at the graph of the function touches the x-axis.
2. Consider the function 
Zeros are:
Zero has multiplicity of 1, zero 
has multiplicity of 2.
At the graph of the function crosses the x-axis, at the graph of the function touches the x-axis.
The mechanical advantage is the ratio of the radii: 5/0.5=10.
(70+71+72+x)/4 ≥ 73
(213+x)/4 ≥ 73
213+x ≥ 73*4
213+x ≥ 292
-213 -213
x ≥79
Check:
(70+71+72+80)/4
292/4
73.25
Your Answer:
x ≥ 79
