1.
(3/4)^2 = (3/4)* (3/4)
(3/4)*(3/4)= 9/16
Final answer: 9/16
2.
11+6.4= 17.4
Final answer: 17.4
3.
9.5-2.8= 6.7
Final answer: 6.7
The answer you are looking for is: -15.
I hope this helps.
To find the answer, take the measurement of an edge of the cube, multiply it by 6, and then square that number.
Ex:
Edge = 16
Faces in 1 cube = 6
6 * 16 = 96
96^2 (which is just 96 * 96)= 9,216
I hope this helps! :)