Which of the following describes all values of x for which 25-x^2 ≥ 0 ? Pick.
A) x ≥ 1
B) x ≤ -1
C) 0 ≤ x ≤ 1
D) x ≤ -1 or x ≥ 1
E) -5 ≤ x ≤ 5
25-x^2 &gt;= 0 ---&gt; x^2-25&lt;=0   --&gt; (x+5)(x-5)&lt;=0   Above equation true for   i) x+5&lt;=0 and x-5&gt;=0 ---&gt; x&lt;= -5 and x&gt;=5 ---&gt; this is not possible ---Strike out this solution   ii) x+5&gt;=0 and x-5&lt;=0 ---&gt; x&gt;=-5 and x&lt;=5 --&gt; -5&lt;=x&lt;=5   Answer -5 ≤ x ≤ 5
<result>E</result>
Which of the following describes all values of x for which 25-x^2 ≥ 0 ?