3x10+4x1+ 5x1/10 +5x1/100+6x1/1000 in standard form

72 the length of a side of a triangle is 36. a line parallel to that side divides the triangle into two parts of equal area. find the length of the segment determined by the points of intersection between the line and the other two sides of the triangle.

Convert the density of surface sea water to metric tons/cubic meter

Iwas absent when my class learned this and my teacher is to lazy to teach it to me explain this to me .