一道数学题,求大神解答

2024-12-29 05:48:17
推荐回答(1个)
回答1:

π(0.15+0.001)²-π0.15²=3.14x0.022801-3.14x0.0225
=3.14x0.000301
=0.00094514
体积0.00094514x4=0.00378056
质量8.9x0.00378056=0.033646984(克)