Which of the following accurately describes properties of valence? a. the smaller the number of electrons an atom has to borrow or to lend, the greater the activity of the atom. b. metals tend to have a negative valence and tend to be electron borrowers. c. the greater the number of electrons an atom has to borrow or to lend, the greater the activity of the atom. d. nonmetallic elements tend to have a positive valence and tend to be electron borrowers.

What you see with your eyes is a form of energy. a. light b. heat c. chemical d. electrical

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

Ais a machine that makes work easier when a single force is applied. a simple machine b compound machine c endangered machine d complex machine