I think your question should read "A circle has an AREA of 81 PI square units...)
Circle Area = PI * radius^2
81 PI = PI * radius ^2
radius^2 = 81 PI / PI
radius^2 = 81
radius = 9
Therefore circle diameter = 9 * 2 = 18
Answer:
B
Step-by-step explanation:
Sana makatulong answer ko
Answer:
The nonpermissible replacement of the variable y is -3
Step-by-step explanation:
The nonpermissible replacement of the variable in a certain expression is the value of the variable that will make the denominator of the expression zero.
The expression
has the denominator 
This denominator cannot be equal zero, thus,

This = - 8 * 1/2 * sqrt2*sqrt32
= -4 * sqrt64
= -4 * 8
= -32 (answer) Its B
8 hours 2 minutes. if you add 8hours to 10:13 you get 6:13 then just add 2 minutes and you will have 6:15 p.m