Can somone please help me, Im so confused!

An engineering team designs a new rocket that is faster and lighter than any other model being produced. however, the materials end up being so expensive that no company can afford to buy them. which step of the engineering process should have addressed this problem? a. know the background. b. evaluate the results. c. identify a need. d. do the work.

Why do cells appear different in distilled water than they do in 10% salt water?

‘which reaction would most likely require the use of an inert electrode?