A patient receives an injection of 1.8 milligrams of a drug, and the amount remaining in the bloodstream t hours later is A(t) = 1.820'05t. Find the instantaneous rate of change of this amount at the following intervals. (a) just after the injection (at time t = 0). (b) after 2 hours (Round your answer to three decimal places.) :] mg per hr Need Help? -/2 Points] DETAILS BERRAPCALCBR7 4.3.087. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The weekly sales (in thousands) of a new product are predicted to be S(x) = 1000 goes0'\" after X weeks. Find the rate of change of sales after the following amounts of time. (Round your answers to one decimal place.) (a) 1 week thousand sales per week (b) 13 weeks thousand sales per week Need Help? 6. [l8 Points] - BERRAPCALCBR7 4.3.093. ASK YOUR TEACHER PRACTICE ANOTHER A mug of beer chilled to 30 degrees, if left in a 76-degree room, will warm to a temperature of T(t) = 76 7 46e'3'5r degrees in 1' hours. (a) Find T(0.25) and T'(O.ZS). (Round your answers to one decimal place.) ran-25> = Cr W.) = :r Interpret your answers. After 15 minutes, the temperature of the beer is l degrees and is increasing at the rate of C] degrees per hour. (b) Find T(1) and T'(1). (Round your answers to one decimal place.) Interpret your answers. After 1 hour, the temperature of the beer is l l degrees and is increasing at the rate ofl degrees per hour. Need Help