Pure acid is to be added to a 10% acid solution to obtain 90L of 81% solution. What amounts of each should be used? How many liters of 100% pure acid should be used to make the solution?

Plot the points (0,6), (3,15.8), and (9.5,0) using the graphing tool, and find the function

Alonso walked with his friend andy one day, and wanted to compare their speeds. alonso walked 3 miles in one hour, and andy walked 2 miles in 2 hours. complete the table to graph the relationship for each person.

Lv beethoven software supplies customized software to a managed healthcare system. lv beethoven software's costs for the software is $1,723,000. lv beethoven software sells the software to the healthcare system for $3,816,981.10. overhead expenses are estimated at 47% of the selling price. what is lv beethoven software's net profit to the nearest dollar?