Mathematical representation ability is needed by students in understanding the material and solving problems. This study aims to determine and describe the mathematical representation abilities of junior high school students in solving non-routine quadrilateral questions using discovery learning models. The method used in this research is descriptive through a qualitative approach. The research…
ABSTRACT:The problem of groundwater in Banyuasin Regency, Kenten Laut sub-district, the residential area has a surface water quality with an iron (Fe) content of 3,324 mg/L. The reduction in iron content can be done by the adsorption method, namely by using an adsorbent. Banana peels contain pectin and cellulose which have the potential to be used as raw materials for heavy metal adsorbents. Th…