Indicate whether the observational study used is cross-sectional, retrospective or prospective: Researchers from the National Institute of Health want to determine the current rates of smoking among adult males and adult females. They conduct a survey of 500 adults of each gender.

Cross-sectional

Step-by-step explanation:

Cross sectional study is a type of observational study that analyzes data from a population of a representative subset at a particular point in time.

idek

step-by-step explanation:

hello :

by applying the distributive property :

6 × 4.3 = 6 × ( 4 + 0.3 )

            =   (6 ×   4) + (6 ×   0.3)

            = 24 + 1.8

6 × 4.3 = 25.8