1) 4^3 - 3^4 = 64 - 81 = (-17)
2) 34.782467:
to nearest decimal point: 34.7
to nearest 4 significant figures: 34.78
3) 2x + 4 / 18
x = 4
(2)(4) + 4 / 18
(8) + 4 / 18
12 / 18
0.66 (was rounded to nearest decimal place)
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