Answer:
Longitudinal study
Step-by-step explanation:
Information is collected over extended periods of time in a longitudinal study, but in cross-sectional, natural observation, and experimental studies, information is collected over short periods of time or in one time only. Based on the choices given, this type of study would be a longitudinal study.
I drew this by hand. sorry I it does not help.
Answer:

Step-by-step explanation:
Given:

add all together with exponents
=48*290
= Then turn into a smaller exponent
= 
combine like terms

=
C :) brainiest? This is correct because I did the math lol