A. true B. true
C. false
D. true

I just need good explanations
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How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way

An object in geometry with no width, length or height is a(n):

Robin spent 25% more time on his research project than he had planned he’s been an extra h ours on the project which of the following expressions could represent the number of hours rob actually spent on the project