researcher for the EPA measured the amount of arsenic in the water near a sewage treatment plant. Over 12 days, he took n=40n=40 measurements (in ppb). His sample data is summarized in the frequency distribution polygon shown below. (image attached) Question:  How many measurements taken in this time frame were within 70−75 ppb? ans =

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Q: 1.) Determine [-5 aces the dimension of the matrix. -9 7 28 13 3 X 10 -1 7 1 ka-

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Q: You have the following geometric sequence. Find the formula for the 3,-6,18,-54,...... a)3+(n-1)3…

A: Topic:- sequence and series