1. Partial differential equations has independent variable a) 0+ b) 1+ c) Less than 14 d) More than 1+ 2. d' A at 2 represents a) First order ODE b) Second order ODE c) Third order ODE+ d) nth order ODE 3. Homogeneous system of linear equations has a unique solution (the trivial solution) if and only if its determinant is a) Non-zero b) Zero c) -2+ d) -1+ 4. What is the order of the differential equation given by d dy +4y=sinx?- a) 0.54 b) 1 + C) 2 + d) 0+ 5. A racer accelerates from a stop so that its speed is 10t m/s t second after starting how far will the car go in 4 seconds?+ a) 80m+ b) 60m+ c) 40m+ d) 160m