Modern technology has allowed scientists to view many features found on the planet Mars, including volcanoes, channels, valleys, and gullies.
These features are
OA. proof that life once existed on Mars.
ОВ.
evidence that Mars was once one of Earth's moons.
C.
evidence of geologic activity on Mars.
OD
proof that Mars was formed by the Big Bang.

Write a full page that sumerizes thermodynamics it’s from the website visionlearnig

Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.

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