Answer:
We get Q=63 when p=81
Option A is correct.
Step-by-step explanation:
We are given that 
We can write it as 
Where k is constant of proportionality.
We are given Q = 21 when p = 9
Using this Q = 21 when p = 9 we can find value of k

So, we get constant of proportionality k = 7
Now, Finding the value of Q when p = 81
We are given p=81, k=7, we need to find Q
Using the equation
we can find value of Q.

So, we get Q=63 when p=81
Option A is correct.
The (assumed) answer to this question is no, his mean is $88.67 and his average mean he chose was $92. (Answer inconclusive due to asked question failing to repeat desired answer.)
It is D. 5.0% <span>The formula for simple interest is I=Prt </span>
<span>I is interest, p is amount originally deposited, r is the rate, and t is time. </span>
Yes 2m x 2m does equal 4m^2 and im sure you know 5 x -5 =-25