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.
We know that m-------------------- > <span>the amount of twinkle lights Maggie used l--------------------- > </span><span>the amount of twinkle lights Lilly used l=70 m=51+l therefore m=51+70=121 m=121
the answer is 121 (</span>amount of twinkle lights Maggie used)
