.100
64.
64, 81, 100
7^2=49 < 50 < 8^2=64 < 9^2=81 < 10^2=100 < 110 < 11^2=121 so there are 3 perfect squares greater than 50 and less than 100 viz. 64, 81 and 100.
-28
anything from .81 and greater... ha.
It is 81
no its not
Yes.
No.
There are several, but here are four: 108, 117, 189, 198.
81 centiliters is = to 810 milliliters, so no, 81 cL is less than 8100 mL.