Answer:
9
Step-by-step explanation:
Compare your x2 + y2=81 to the following:
x^2 + y^2 = 81
The " ^ " symbol indicates exponentiation.
Now compare x^2 + y^2 = 81 to
x^2 + y^2 = r^2.
This is the standard equation of a circle of radius r centered at the origin, (0,0). You can see for yourself that 81 must equal r^2.
Taking the square root of 81, we get plus or minus 9.
But the radius must be positive, so we reject the -9 and take +9.
The radius is 9.
Answer:
Step-by-step explanation:
16.76FT^3
Answer:
hope it helps you see the attachment for further information
Answer:
Option (2)
Step-by-step explanation:
Given expression is 
÷ 
We further simplify this expression,
÷
= 
= 
= 
Therefore, will be the quotient of the given expression.
and 
for which the given expression is not defined.
Option (2) will be the answer.
