Historically astronomy was limited to visible light; meaning light we can see with our eyes. Visible light is still particularly important for astronomers on the ground even though we have electronics that can detect all sorts of other wavelengths of light we cannot see with our eyes.

What is it about Earth's atmosphere that makes visible light more useful than most other wavelengths of light for astronomers on the ground?

Note: The answer you give should have nothing to do with whether we can see particular type of light using our eyes.

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