Wavelength is measured in various units of distance (mm, cm, m, etc.). Frequency uses hertz, but that is not what the question is asking. Therefore, the answer is false.
Answer:
a)
, b)
, c) 
Explanation:
a) The initial potential energy is:


b) The efficiency of the bounce is:


c) The final speed of Danielle right before reaching the bottom of the hill is determined from the Principle of Energy Conservation:





A tsp
1 milliliter equals 0.202. US teaspoons. boi did that help
Selection D makes most sense