Answer:
P = F / A = 40 N / (0.0045 m^2) = 8889 N/m^2
2.5 : 2
Step-by-step explanation:
2(4a - 4b) + 4(3a + 2b) = 20a
2(4a - 4b) + 4(3a + 2b)
8a - 8b + 12a + 8b
8a + 12b - 8b + 8b
20a+ 0 = 20a
Thus, 2(4a - 4b) + 4(3a + 2b) = 20a
<u>-TheUnknownScientist</u>