The diagonals bisect each other
The answer is 6.7 bc .09 times 74 equals 6.66 so you round the 6 to a 7.
0.7 + 0.4 + 0.6 + 0.4 = 2.1 is the perimeter
0.7 x 0.4 = 0.28
0.6 x 0.4 = 0.24
0.28 + 0.24 = 0.52 is the area
Hope that helped!
Interval notation
(-infinity sign, 1)
Set-builder notation
{x|x less than equal to 1}