Hii pls help me to write the ionic equation ​

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.

How have the greenhouse gasses increased from the year 2000 to 2018

Which rate indicates the number of children that would be born per woman if she were to live to the end of her child bearing years