Answer:
37
Step-by-step explanation:
if lucy was half lisa's age at 6, that means she was 3. so there's a 3 year difference between the two sisters, so now if Lisa is 40, that makes Lucy 37.
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210cm
B=l•w
B=5•6
B=30
V=B•h
V=30•7
V=210
a.
b.
