Answer: a) Lower limit: (13.1 - 0.05) - (18.7 + 0.05) = -5.65 cm
Upper limit: (13.1 + 0.05) - (18.7 - 0.05) = -4.95 cm
Therefore, the lower limit of the difference is -5.65 cm and the upper limit is -4.95 cm.
b) Lower limit: (0.55 - 0.005) - (0.093 + 0.005) = 0.447 km
Upper limit: (0.55 + 0.005) - (0.093 - 0.005) = 0.457 km
Therefore, the lower limit of the difference is 0.447 km and the upper limit is 0.457 km.
c) Lower limit: (2539 - 0.5) - (1.229 + 0.001) = 2537.27
Upper limit: (2539 + 0.5) - (1.229 - 0.001) = 2541.27
Therefore, the lower limit of the difference is 2537.27 and the upper limit is 2541.27.
d) Lower limit: (8.3 - 0.1) - (15.9 + 0.1) = -7.7 m
Upper limit: (8.3 + 0.1) - (15.9 - 0.1) = -7.3 m
Therefore, the lower limit of the difference is -7.7 m and the upper limit is -7.3 m.
Step-by-step explanation: omg u made me so tired