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Mathematics, 21.06.2019 20:00, Chen5968
The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?
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Mathematics, 22.06.2019 00:30, braydenmcd02
Hi iβm not sure how to do question 20 if u could explain how to do it thatβd b great
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Mathematics, 22.06.2019 01:10, calmicaela12s
A3cmΓ3cm\greend{3\,\text{cm} \times 3\,\text{cm}} 3cmΓ3cm start color greend, 3, space, c, m, times, 3, space, c, m, end color greend rectangle sits inside a circle with radius of 4cm\blued{4\,\text{cm}} 4cm start color blued, 4, space, c, m, end color blued . what is the area of the shaded region? round your final answer to the nearest hundredth.
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