4 should be D and 5 the change would be .94
<span>3•(x•y)=(3•x)•y
</span>
answer
associative property of multiplication
The point on the unit circle corresponding to -180 degrees is
((x, y) = (-1, 0).
<span>tan(-180°) = y/x = 0/(-1) = 0</span>
The answer is <span>π8^2 or about 201.06</span>