Chandra has 2 liters of a 14% solution of sodium hydroxide in a container. what is the amount and concentration of sodium hydroxide solution she must add to this in order to end up with 7 liters of a 34% solution?

!! 10 ! a westbound jet leaves central airport traveling 635 miles per hour. at the same time, an eastbound plane departs at 325 miles per hour. in how many hours will the planes be 1900 miles apart?

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?

Apack of gum would be considered a(n) necessity luxury item small ticket item unaccountable expense