1) The radius would be r = x + 4y
<span>.... and the area would be A = pi ( x + 4y )^2 </span>
<span>2) x is not defined. You have to state the relationship of x with l ,w, and, h </span>
<span>3) The square prism is a cube. I assume that the edge is x. Then the perimeter of any one face is : </span>
<span>... p = 4x</span>
For this problem, we can assume the total money is X, than we can get the equation of: 0.08*X*12=7680, than we can know X=8000, therefore, Mike's grandmother deposit 8000 in the account.
