Tiago Machado
自 2016 起处于活动状态
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Sound Level in units of decibels
Sound level in units of decibels (dB) is determined by:LP 20 10 p p0 ----⎝⎠ where p is the sound pressure of the sound, and ...
8 years 前 | 0 个回答 | 0
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hello there, can you please help me on this
The number of combinations of taking r objects out of n objects is given by: A deck of poker cards has 52 different cards. De...
8 years 前 | 1 个回答 | 0