4. The half-life of cadmium-109 is 464 days. A scientist measures out a 256.0 gram (g) sample. Approximately how many grams of cadmium-109 would remain after 1,392 days

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.

When a septic tank backs up a goes in to clean it out

What human activity increases beach erosion?