X07 · Optional projects job
Five $18 kits plus one $4 fee; budget $95. Explain two estimates and why the exact result decides.
Use scrap paper or a private explanation. No purchase, household information or public performance.
Adult teaching after an own try
Answer
Upper check:$110 using20and10. Lower check:$50 using10and0. Exact:$94/$1 left. Both rough bounds alone straddle the budget.
Why
Bounded uncertainty differs from an exact transaction.