Use similar triangles △EFG and △IHG to find the missing distance d

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Oscar and julie ashton are celebrating their 15th anniversary by having a reception hall. they have budgeted $4,500 for their reception. if the reception hall charges a $90 cleanup fee plus & 36 per person, find the greatest number of people that they may invite and still stay within their budget.

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.