Which statement is true regarding mechanical and electromagnetic waves

Si una estrella no tiene paralaje medible, ¿qué puedes inferir?

What is the result of multiplying (2.5 × 1010) × (2.0 × 10-7)? a. 5.0 × 103 b. 5.0 × 10-3 c. 5.0 × 1017 d. 5.0 × 10-17

Look at the bean data from days 4–6. use these data to explain how natural selection changed the number of dark red walking beans over time. writing part