Answer:

Step-by-step explanation:
<h3>to understand this</h3><h3>you need to know about:</h3>
<h3>tips and formulas:</h3>
<h3>given:</h3>
- r=10

<h3>let's solve:</h3>




You can get the answer to this on google
X^2-11x+28=0
(x-7)(x-4)=0
x-7=0
x=7
x-4=0
x=4
Answer:
18.84
Step-by-step explanation:
C because I just did that