# 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.

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