Answer:
Step-by-step explanation:
a) 20% decrease, b) 25% increase
(n/3)/4 =20
i think this is what your looking for if not im sorry
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5
547.5 cm
730(9/12)=547.5
-a²-3b³+c²+2b³-c²
= -(3)² - (3×2)³ + (-3)² + (2 × 2)³ - ( -3)²
= 9 - 24 + 9 + 16 - 9
= 1
answer is 1.
