街心花园的花坛是一个长19米、宽6米的长方形,围着花坛走4圈,要走多少米?
(19+6)×2×4,
=25×8,
=200(米);
答:要走200米.
复利计息有间断复利和连续复利之分。如果计息周期为一定的时间区间(如年、季、月等),并按复利计息,称为间断复利。( )
The differences of scores between boys and girls are limited only to the US.