I think it is either A or B. I’m mostly leaning towards B.
The image shows a continuous signal and is not made of numbers, so this signal is an analog signal. Gina is not correct in her identification of the signal.
The answer would be 20000
The answer in standard form/scientific notation would be 2 x 10^4
(The exponent is 4 because that's how many digits after the 2 there is)
Answer:
The focal length of a lens is refers to the distance from the center of the lens to the principal foci.
Acceleration is 0, speed is constant, velocity is always changing because if you are running in a circle the direction you are facing always changes