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For Problems 20–22, determine whether the given function is an
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Differential Equations and Linear Algebra (4th Edition)
- An antibiotic is administered intravenouslyinto the bloodstream at a constant rate r. As the drug flowsthrough the patient’s system and acts on the infection that is present,it is removed from the bloodstream at a rate proportional tothe amount in the bloodstream at that time. Since the amount ofblood in the patient is constant, this means that the concentrationy = y(t) of the antibiotic in the bloodstream can be modeled bythe differential equation dy/dt = r - ky, k > 0 and constant. If y(0) = y0, find the concentration y(t) at any time t.arrow_forwardSolve the differential equation xdy - ydx = 2x³dx. A. y = x² + Cx B. y = x³ + C C. y = x³ + Cx D. y = x² + Cx³arrow_forwardDetermine the degree of the differential equation: A B 2 6 3x² No degree 3 d²y + 4xy dx² 3/2 = (2x3 2y³ d³y dx³ - 4xy 2/3 ...arrow_forward
- Newton's law of cooling states that for a cooling substance with initial temperature To, the temperature T(t) after t minutes can be modeled by the equation T(t) =T, + (To – T)e-kt, where T, is the surrounding temperature and k is the substance's cooling rate. A liquid substance is heated to 80°C. Upon being removed from the heat, it cools to 60°C in 12 min. What is the substance's cooling rate when the surrounding air temperature is 50° C? Round the answer to four decimal places. O 0.0687 O 0.0732 O 0.0813 O 0.0916arrow_forwardIn 2 I = t-2 e(-1/t) dtarrow_forwardGiven the function y = x3 + x² + x + 10, suppose x increases from 1 to 1.1. Find the absolute error and percentage error that result if we approximate the resulting change in y using the differential formula.arrow_forward
- Use appropriate substitution to solve the differential equation dy dx = 2x + y2 + 1 4x + 2y y = -2x.arrow_forwardFind the differential equation having the solution as:arrow_forward(y+2)dx +y(x+4)dy = 0 ; y(-3) = -1 a. Identify the Differential equation if it is an ODE or PDE.b. Explain why thru discussing which one is the dependent and independent variable. Thenc. Solve the equation if ODE by using any of the SHIELDS method. Explain why this methodwas usedarrow_forward
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