DSHUN EDWARDS Question 3 of 7, Step 1 of 2 2/17 Correct The effectiveness of a certain medical injection is modeled by E(t) = 0.01t(100 - t), where t is time in minutes and E is a measure of concentration in the bloodstream. Effectiveness readings above 23 are satisfactory and readings above 41 are dangerous. Step 1 of 2: How many minutes after the first injection are the readings satisfactory and how many minutes after the first injection do they become too low? Express your answer in exact form or as a decimal number rounded to two decimal places. Answer E Keypa- Keyboard Shorto Readings become sufficient at minutes Readings become too low again after minutes

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