Which of the following statements is NOT true? (a) The self-inductance of a long solenoid depends on the number of turns in the solenoid (b) Electric fields carry energy (c) The term mutual inductance refers to the flux of one solenoid affecting the self-inductance of another (and vice versa) (d) Magnetic fields carry energy (e) The time constant of an RL circuit tells you how long it takes to charge the circuit up fully

The second largest public utility in the nation is the sole provider of electricity in 32 counties of southern florida. to meet the monthly demand for electricity in these counties, which is given by the inverse demand function p = 1,200 – 4q, the utility company has set up two electric generating facilities: q1 kilowatts are produced at facility 1, and q2 kilowatts are produced at facility 2 (so q = q1 + q2). the costs of producing electricity at each facility are given by c1(q1) = 8,000 + 6q12 and c2(q2) = 6,000 + 3q22, respectively. determine the profit-maximizing amounts of electricity to produce at the two facilities, the optimal price, and the utility company’s profit