The formula for surface area are 2(LW+LH+WH). If the numbers were being placed in the formula, it will become 2[(9*7)+(9*12)+(12*7)]. 9*7 is 63, 9*12 is 108, 12*7 is 84 and the sum will be 255, and multiply by 2 is 510.
The answer is 510
Answer:

Step-by-step explanation:
When you use "and" you multiply the probabilities
Probability to get a 4 is 1/6
Probability to get a 5 is 1/6
Probability to get a 4 with a dice "and" a 5 with the other is 1/6 * 1/6 = 1/36
Answer:
3
Step-by-step explanation:
if you do the math 5+5 is 10 and 3.5 is half of 5 so the answer if you round is 3
Answer:
90
Step-by-step explanation:
40+50 ......................