Va rog urgent e pt chimie

Evaluate this exponential expression,8. (2 + 3)2 – 42

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.

Match the mixture with the substance// i really need on this guys (it’s a pic btw)