Can someone me with this today is the last day i have to complete this! check all of the points

The areas of two similar triangles are 72dm2 and 50dm2. the sum of their perimeters is 226dm. what is the perimeter of each of these triangles?

Judy garland electronics operate on a net-profile rate of 20% on its printer cables. if the markup is $8.95 and the overhead is $4.31,find the net profit and the selling price? use the net-profit rate formula to solve this problem.

Convert 3,200,000 to a scientific notation.